CN110526681A - A kind of high fire endurance foamed ceramic and preparation method thereof - Google Patents
A kind of high fire endurance foamed ceramic and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of high fire endurance foamed ceramics, are mainly made of raw material from the following weight: 90~95 parts, 1~5 part of lithium compound, 1~3 part of clay, 0.5~1 part of foaming agent, 0.2~1 part of stabilizer of the red tailing in Luoyuan；The sum of each raw material component parts by weight are 100 parts；Wherein, the lithium compound selects one of spodumene, lithium porcelain stone, lepidolite, montebrasite, petalite, lepidolite, zinnwaldite or a variety of.The present invention is added to lithium-containing compound among formula, and since Li particle radii are small, electric field strength is big, therefore have the function of Strengthens network, the thermal expansion coefficient of foamed ceramic may make to reduce, crystallization tendency becomes smaller, the fire resistance that foamed ceramic can be improved widens the application field of foamed ceramic.
Description
Technical field
The present invention relates to field of inorganic nonmetallic material more particularly to a kind of high fire endurance foamed ceramic and its preparation sides
Method.
Background technique
Foamed ceramic is a kind of New Building Materials, internal to have a large amount of sealed porosity, therefore has lightweight heat-proof
The advantages of heat preservation；Meanwhile this foamed ceramic also has the advantages that compression strength is high, water absorption rate is low etc.；Existing foaming for building
Ceramics mostly use ceramic tile factory polished waste material or other wastes (such as granite waste material, flyash) as base-material, are conducive to solve
Certainly solid waste pollution problem.Therefore, foamed ceramic has extremely wide application prospect.
From mineral composition, foamed ceramic matrix is by crystal phase and glass phase composition, while intrinsic silicon also contains this
The closed air bubbles formed under a large amount of vacuum and semi-vacuum state.This mine phase composition determine its surface layer heat when, glass phase with
Thermal stress extension between crystal phase is easy to produce quickly and bursts phenomenon, i.e., its fire endurance is very low；Meanwhile in closed air bubbles
A small amount of gas also can expanded by heating, accelerate the diffusion of this stress, further decrease the fire endurance of foamed ceramic.
To solve the above-mentioned problems, Chinese patent CN109503138A discloses a kind of fire resisting foamed ceramic, by
Foamed ceramic matrix surface be arranged refractory coating, refractory coating by spodumene, foamed ceramic fine powder, bentonite, calcination of talc,
Potassium feldspar, albite, glass powder, nanometer titanium dioxide Silica hydrogel, aluminium oxide, aluminium dihydrogen phosphate and water are made；It is burnt in foamed ceramic
At later, above-mentioned refractory coating is coated to foamed ceramic surface, is being heating and curing；This complex process, and matrix surface
Refractory coating is easy to fall off in anxious thermal process, it is difficult to be played a protective role.Chinese patent CN108395273A provides one kind
The production technology for improving foamed ceramic partition plate fire endurance, by adding the zirconium oxide of high fire endurance among formula,
And specific firing process, reduce the internal stress after foamed ceramic is heated, improves fire endurance.But due to oxygen
It is high to change zirconium firing temperature, causes the firing heat consumption of foamed ceramic to be promoted, and zirconium oxide price is higher.
Summary of the invention
Technical problem to be solved by the present invention lies in, a kind of high fire endurance foamed ceramic is provided, fire endurance is high,
Production cost is low.
The present invention also technical problems to be solved are, provide a kind of preparation side of above-mentioned high fire endurance foamed ceramic
Method.
In order to solve the above-mentioned technical problems, the present invention provides a kind of high fire endurance foamed ceramics, mainly by following
The raw material of parts by weight is made:
90~95 parts of the red tailing in Luoyuan, 1~5 part of lithium compound, 1~3 part of clay, 0.5~3 part of foaming agent, stabilizer 0.2
~1 part；
The sum of each raw material component parts by weight are 100 parts；
Wherein, the lithium compound selects spodumene, lithium porcelain stone, lepidolite, montebrasite, petalite, lepidolite, iron
One of lepidolite is a variety of.
As an improvement of the above technical solution, the red tailing in the Luoyuan mainly consists of the following components in percentage by weight:
SiO268~73%, Al2O312~15%, Fe2O31.2~2%, CaO 0.5~1.5%, MgO 0.2~0.5%, K2O 5
~5.5%, Na2O 3~5%, LOI 0.5~3%.
As an improvement of the above technical solution, the lithium compound selects lithium porcelain stone and/or spodumene.
As an improvement of the above technical solution, the clay selects Luoyuan sand hill soil, mud washing, black mud, harbour road mud or sea
One of mud is a variety of.
As an improvement of the above technical solution, the Luoyuan sand hill soil mainly consists of the following components in percentage by weight:
SiO270~75%, Al2O312~16%, Fe2O30.5~1.5%, CaO 0.3~0.5%, MgO 0.01~0.1%,
K2O 4~6%, Na2O 3~5%, LOI 1~5%；
The mud washing mainly consists of the following components in percentage by weight: SiO245~50%, Al2O332~36%,
Fe2O32~3%, CaO 0.01~0.1%, MgO 0.3~0.5%, K2O 2~3%, Na2O 0.3~0.8%, LOI 8~
12%；
The black mud mainly consists of the following components in percentage by weight: SiO261~65%, Al2O320~24%,
Fe2O31.5~3%, CaO 0.3~1%, MgO 0.3~0.5%, K2O 1~2%, Na2O 0.2~0.6%, LOI 5~
10%；
The harbour road mud mainly consists of the following components in percentage by weight: SiO268~72%, Al2O312~15%,
Fe2O32~3%, CaO 3~5%, MgO 1.5~3%, K2O 3.5~5%, Na2O 1.5~3.5%, LOI 1~8%；
The ooze mainly consists of the following components in percentage by weight: SiO268~72%, Al2O311~14%,
Fe2O33~4%, CaO 2~3.5%, MgO 1.5~2.5%, K2O 3~5%, Na2O 1~3%, LOI 3~10%.
As an improvement of the above technical solution, the foaming agent is selected in silicon carbide, carbon dust or ceramic abrading block reclaimed materials
It is one or more；The stabilizer selects manganese dioxide.
As an improvement of the above technical solution, fire endurance >=2h of the high fire endurance foamed ceramic, combustion rating
It is A1 grades, compression strength >=7MPa, bulk density is 200~450kg/m3, thermal coefficient≤0.13W/m DEG C, water absorption rate≤
0.5%, IRa≤ 1.0, Ir≤1.0。
Correspondingly, the invention also discloses a kind of preparation methods of above-mentioned high fire endurance foamed ceramic comprising:
(1) various raw materials are uniformly mixed according to formula, obtain mixture；
(2) mixture is subjected to ball milling, obtains slurry；
(3) slurry is subjected to mist projection granulating, obtains powder；
(4) the powder cloth is expected among high temperature sagger；
(5) high temperature sagger is placed in kiln, is burnt into according to default sintering curve, obtains high fire endurance foamed ceramic
Finished product.
As an improvement of the above technical solution, the firing temperature is 1120~1160 DEG C, and firing period is 5~13h；
The sintering curve are as follows:
From room temperature to 800 DEG C, using the heating rate of 400~500 DEG C/h；
From 800 DEG C to firing temperature, using the heating rate of 200~250 DEG C/h；
0.5~1.5h is kept the temperature in firing temperature；
From firing temperature to 600 DEG C, using the rate of temperature fall of 500~1000 DEG C/h；
From 600 DEG C to room temperature, using the rate of temperature fall of 200~300 DEG C/h.
As an improvement of the above technical solution, in step (2), the fineness of the slurry is that 250 meshes tail over < 0.5%.
The invention has the following beneficial effects:
1. the present invention is added to lithium-containing compound among formula, since Li particle radii are small, electric field strength is big, therefore has
There is Strengthens network, the thermal expansion coefficient of foamed ceramic may make to reduce, crystallization tendency becomes smaller, and foamed ceramic can be improved
Fire resistance widens the application field of foamed ceramic.
2. the lithium in lithium-containing compound in the present invention is carved at high temperature forms asymmetric center in the structure, and can polarize
Cation plays the role of mitigation and destroys silicon oxygen bond, can play the fluxing effect of high temperature, reduce firing temperature, shorten firing
Period reduces firing cost, energy-saving.
3. the present invention selects lithium porcelain stone to be used as lithium-containing compound, containing a small amount of sericite mineral in structure, plasticity compared with
By force, the dosage of clay among formula can be reduced.
4. the present invention uses the red tailing in Luoyuan to prepare foamed ceramic for primary raw material, the red tailing accounting in Luoyuan reaches 90%~
95%, recycling, the high value added utilization of the red tailing in Luoyuan, energy conservation and environmental protection are realized, while also reducing the life of foamed ceramic
Produce cost.
Detailed description of the invention
Fig. 1 is a kind of preparation method flow chart of high fire endurance foamed ceramic of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.Only this is stated, the present invention occurs in the text or will occur up, down, left, right, before and after, it is inside and outside etc. just
Position word is not to specific restriction of the invention only on the basis of attached drawing of the invention.
The present invention provides a kind of high fire endurance foamed ceramic bricks, are mainly made of raw material from the following weight:
90~95 parts of the red tailing in Luoyuan, 1~5 part of lithium compound, 1~3 part of clay, 0.5~1 part of foaming agent, stabilizer 0.2
~1 part；The sum of each raw material component parts by weight are 100 parts；Wherein, the lithium compound select spodumene, lithium porcelain stone, lepidolite,
One of montebrasite, petalite, lepidolite, zinnwaldite are a variety of；The red tailing in Luoyuan is mainly by following weight
The group of percentage is grouped as: SiO268~73%, Al2O312~15%, Fe2O31.2~2%, CaO 0.5~1.5%, MgO
0.2~0.5%, K2O 5~5.5%, Na2O 3~5%, LOI 0.5~3%.
The present invention is added to lithium-containing compound among formula, and since Li particle radii are small, electric field strength is big, therefore has
The effect of Strengthens network may make the thermal expansion coefficient of foamed ceramic to reduce, and crystallization tendency becomes smaller, and the resistance to of foamed ceramic can be improved
Fiery performance widens the application field of foamed ceramic.
Meanwhile lithium can play the fluxing effect of high temperature, can melt at 900~1000 DEG C, can play reduction firing temperature
Degree, reduces the effect of energy consumption.But lithium also will be greatly reduced the viscosity of firing melt, cause firing defects.For this purpose, this hair
It is bright that the red tailing in Luoyuan is selected.Specifically, the red tailing in Luoyuan mainly consists of the following components in percentage by weight: SiO2
68~73%, Al2O312~15%, Fe2O31.2~2%, CaO 0.5~1.5%, MgO 0.2~0.5%, K2O 5~
5.5%, Na2O 3~5%, LOI 0.5~3%.The red tailing in Luoyuan is leftover pieces remaining after the red exploitation in Luoyuan and some
Sawdust etc..Mutually uniformly Luoyuan is red identical with mine for its ingredient.In terms of mineralogy angle, Luoyuan is red to belong to a kind of granite, Hua Gang
Rock is mainly made of mica, quartz and feldspar；Particularly, potassium composition content is higher by (5.0 among the red tailing in Luoyuan in the present invention
~5.5wt%), i.e. potassium feldspar component content is higher, and the viscosity of high-temperature melt that the red tailing in Luoyuan melts is higher, the red tail in Luoyuan
Mine and lithium-containing compound are arranged in pairs or groups, and can eliminate the defect that melt viscosity is greatly lowered in lithium-containing compound to a certain extent, guarantee to burn
At going on smoothly.
In addition, the red tailing in Luoyuan in the present invention can also act synergistically with lithium-containing compound, firing temperature is reduced, shortens and burns
At the period.In general, the foamed ceramics of common solid waste base (tailing, polishing slag), roller kiln burning at when, firing period
In 9-14h or so, and present invention only requires 5-8 hours；In tunnel oven firing, common solid waste base foamed ceramic firing period exists
24-28h, and present invention only requires 8-13h.This just significantly reduces firing energy consumption.
Preferably, the lithium compound selects lithium porcelain stone and/or spodumene；It is further preferred that selecting lithium porcelain stone；Lithium porcelain
Contain sericite in stone ore object, the plasticity of composition of raw materials can be improved, reduces the usage amount of clay；Meanwhile the partial size of sericite
It is small, fusion temperature is high, lithium porcelain stone fusing after, can preservation in melt, promoted viscosity of high-temperature melt.
In the present invention, the addition parts by weight of the red tailing in Luoyuan are 90~95 parts, are main base.But due to Luoyuan
Red tailing belongs to ridge mineral, among ball milling, aging process can not well suspended, homo-effect is poor；In addition, a large amount of sieve
The red tailing in source but also mist projection granulating cross among can not form biggish particle, obtained powder poor fluidity, it is difficult to cloth.For
This, the present invention selects lithium porcelain stone as lithium compound, while 1~3 part of clay is added, and both this is capable of providing plasticity, meets
Process requirements among ball milling, pulverizing process.
Specifically, the clay selects one of Luoyuan sand hill soil, mud washing, black mud, harbour road mud or ooze or a variety of.
Wherein, sand hill soil in Luoyuan refers to the sandy soil on the red mine surface layer in Luoyuan, mainly by following components in percentage by weight group
At: SiO270~75%, Al2O312~16%, Fe2O30.5~1.5%, CaO 0.3~0.5%, MgO 0.01~
0.1%, K2O 4~6%, Na2O 3~5%, LOI 1~5%；Clay pit phase and the content of feldspar ore phase are equal in the sand hill soil of Luoyuan
It is higher, certain plasticity can be provided, firing temperature can be also further decreased.
Wherein, mud washing is the useless mud obtained after sand hill soil in Luoyuan is washed, and average grain diameter is minimum (1 μm of D50 <)；Plasticity
It is extremely strong.The mud washing mainly consists of the following components in percentage by weight: SiO245~50%, Al2O332~36%,
Fe2O32~3%, CaO 0.01~0.1%, MgO 0.3~0.5%, K2O 2~3%, Na2O 0.3~0.8%, LOI 8~
12%；Alumina content is up to 32~36% in mud washing, and mullite can be converted into during high temperature firing, promotes foaming
Ceramics strength.
Wherein, the black mud mainly consists of the following components in percentage by weight: SiO261~65%, Al2O320~
24%, Fe2O31.5~3%, CaO 0.3~1%, MgO 0.3~0.5%, K2O 1~2%, Na2O 0.2~0.6%, LOI
5~10%.
Wherein, harbour road mud refers to the mud between Luoyuan bay and river；It is mainly by following components in percentage by weight
Composition: SiO268~72%, Al2O312~15%, Fe2O32~3%, CaO 3~5%, MgO 1.5~3%, K2O 3.5
~5%, Na2O 1.5~3.5%, LOI 1~8%.The average grain diameter of this harbour road mud is small (1 μm of D50 <), and plasticity is good.
Wherein, ooze is the ooze in Luoyuan bay；It is mainly consisted of the following components in percentage by weight: SiO268~
72%, Al2O311~14%, Fe2O33~4%, CaO 2~3.5%, MgO 1.5~2.5%, K2O 3~5%, Na2O 1
~3%, LOI 3~10%.The average grain diameter of this ooze is small (1 μm of D50 <), and plasticity is good.
Preferably, in the present invention, the clay selects one of Luoyuan sand hill soil, harbour road mud, ooze or a variety of；It
CaO, content of MgO it is relatively low, K2O content is higher, has good effect to the high-temperature fusant for obtaining suitable viscosity；Into
One step is preferred, selects the mixture of mud washing and harbour road mud；Na in mud washing2O, CaO, content of MgO are lower, it is easier to obtain
The plasticity of the high-temperature fusant of proper viscosity, harbour road mud is stronger, helps to meet process requirements.Wherein, weight is added in sand hill soil in Luoyuan
Measuring part is 0.5~2 part, and it is 1.5~2.5 parts that parts by weight, which are added, in harbour road mud.
Among formula of the invention, also contain 0.5~3 part of foaming agent；The foaming agent selects silicon carbide, carbon dust or pottery
One of porcelain mill block reclaimed materials (main component is silicon carbide and resin) is a variety of；Preferably, silicon carbide is selected.Foaming agent exists
Generation gas can be decomposed among high temperature firing process, reduce foamed ceramic bulk density and thermal coefficient.Preferably, foaming agent
It is 0.1~1 part that parts by weight, which are added, and the foaming agent of this range has preferable foaming effect.
In addition, reducing thermal coefficient and bulk density to optimize foaming effect, it is also necessary to be added among formula a small amount of
Stabilizer.Specifically, in the present invention, the additive amount of stabilizer is 0.1~1 part, and stabilizer selects manganese dioxide.Titanium dioxide
Manganese can decompose release oxygen at 900 DEG C or so, promote the decomposition of foaming agent.Preferably, the addition parts by weight of stabilizer be 0.5~
1 part.Preferably, the additional amount of foaming agent is 2~3 times of stabilizer, with optimal foaming effect in this；It is further excellent
Choosing, foaming agent: stabilizer=(2~2.5): 1.
Preferably, the foamed ceramic in the present invention is made of raw material from the following weight: 92~95 parts of the red tailing in Luoyuan, lithium
3~5 parts of porcelain stone, 0.5~1 part of Luoyuan sand hill soil, 1~2 part of harbour road mud, 0.5~1.5 part of silicon carbide, 0.5~1 part of manganese dioxide；
The foamed ceramic of this proportional region fire endurance with higher, compression strength, lower water absorption rate, thermal coefficient, volume are close
Degree.
In order to promote every property of foamed ceramic in the present invention, it is also necessary to cooperate specific preparation method, specifically, ginseng
Examine Fig. 1, the preparation method of the foamed ceramic in the present invention the following steps are included:
S1: various raw materials are uniformly mixed according to formula, obtain mixture；
S2: the mixture is subjected to ball milling, obtains slurry；
Wherein, the fineness of the slurry is that 250 meshes tail over < 0.5%.It should be noted that in general foamed ceramic
Among production process, fineness control is tailed in 250 meshes 3~5% or so.And present invention reduces the content of clay, because
This promotes the suspension of slurry and the mobility of powder after granulation by way of reducing slurry fineness.
S3: the slurry is subjected to mist projection granulating, obtains powder；
Specifically, being pumped to spray tower spray drying by slurry in stock tank after aging 24~48h, being granulated；Granulation obtains
Powder in more than 40 mesh particle accounting >=20wt%, the powder of this grain composition has preferable mobility, after being conducive to
Continuous distributing technique.
S4: the powder cloth is expected among high temperature sagger；
S5: being placed in kiln for the high temperature sagger, is burnt into according to default sintering curve, obtains high fire endurance foamed ceramic
Finished product
Wherein, the sintering curve are as follows: from room temperature to 800 DEG C, using the heating rate of 400~500 DEG C/h；From 800 DEG C
To firing temperature, using the heating rate of 200~250 DEG C/h；0.5~1.5h is kept the temperature in firing temperature；From firing temperature to 600
DEG C, using the rate of temperature fall of 500~1000 DEG C/h；From 600 DEG C to room temperature, using the cooling speed of 200~300 DEG C/h of rate of temperature fall
Rate.
At 800 DEG C hereinafter, heating rate is very fast, it can prevent from melting on a large scale containing lithium minerals, quickly reduce melt viscosity；From
800 DEG C are arrived firing temperature, lower using heating rate, the potassium-bearing mineral in raw material are sufficiently melted, with melt containing lithium
Cooperation promotes viscosity of high-temperature melt.
In addition, from firing temperature to 600 DEG C, using faster rate, high temperature firing can be prevented molten among cooling procedure
Body significantly crystallization, keeps more glass phase state, to reach the fire endurance for promoting foamed ceramic.From 600 DEG C to room
Temperature may make quartz crystal sufficiently to be converted using lower rate of temperature fall, stress caused by reducing because of quartz crystal lattice conversion
Remnants further promote the fire endurance of foamed ceramic.
Preferably, the firing temperature is 1120~1160 DEG C, and firing period is 5~13h.Specifically, when using roller-way
When kiln is burnt into, firing temperature is 1130~1160 DEG C, and firing period is 5~8h；When using tunnel oven firing, firing temperature
Degree is 1130~1160 DEG C, and firing period is 8~13h.
Under the synergistic effect of above-mentioned formula and preparation method, foamed ceramic that the present invention obtains: its fire endurance >=
2h, combustion rating are A1 grades, and compression strength >=7MPa, bulk density is 200~450kg/m3, thermal coefficient≤0.13W/m DEG C,
Water absorption rate≤0.5%, IRa≤ 1.0, Ir≤1.0。
With specific embodiment, invention is further explained below:
Embodiment 1
The present embodiment provides a kind of high fire endurance foamed ceramic, formulas are as follows: 90 parts of the red tailing in Luoyuan, lithium-containing compound
5 parts, 1 part of black mud, 3 parts of foaming agent, 1 part of stabilizer；
Wherein, the red tailing in Luoyuan is composed of the following components: SiO270.0%, Al2O314.8%, Fe2O31.9%, CaO
1.8%, MgO 0.4%, K2O 5.1%, Na2O 3.8%, LOI 2.2%；
Black mud is composed of the following components: SiO264.6%, Al2O323.4%, Fe2O32.8%, CaO 0.6%, MgO
0.4%, K2O 1.7%, Na2O 0.3%, LOI 6.2%；
Wherein, lithium-containing compound selects lepidolite, and foaming agent selects carbon dust, and stabilizer selects manganese dioxide.
Preparation method are as follows:
(1) various raw materials are uniformly mixed according to formula, obtain mixture；
(2) mixture is subjected to ball milling, obtains slurry；
Wherein, it is 0.5% that the fineness of the slurry, which is that 250 meshes tail over,.
(3) slurry is subjected to mist projection granulating, obtains powder；
(4) the powder cloth is expected among high temperature sagger；
(5) high temperature sagger is placed in kiln kiln roasting, obtains high fire endurance foamed ceramic finished product.
Wherein, when being burnt into using roller kilns, firing temperature is 1130 DEG C, firing period 8h.
Embodiment 2
The present embodiment provides a kind of high fire endurance foamed ceramic, formulas are as follows: 95 parts of the red tailing in Luoyuan, petalite 1
Part, 3 parts of mud washing, 0.5 part of ceramic abrading block reclaimed materials, 0.5 part of manganese dioxide；
Wherein, the red tailing in Luoyuan is composed of the following components: SiO272.6%, Al2O313.2%, Fe2O31.3%, CaO
0.8%, MgO 0.6%, K2O 5.4%, Na2O 3.5%, LOI 2.6%；
Mud washing is composed of the following components: SiO248.1%, Al2O335.9%, Fe2O32.4%, CaO 0.02%,
MgO 0.42%, K2O 2.46%, Na2O 0.6%, LOI 10.1%.
Preparation method are as follows:
(1) various raw materials are uniformly mixed according to formula, obtain mixture；
(2) mixture is subjected to ball milling, obtains slurry；
Wherein, it is 0.3% that the fineness of the slurry, which is that 250 meshes tail over,.
(3) slurry is subjected to mist projection granulating, obtains powder；
(4) the powder cloth is expected among high temperature sagger；
(5) high temperature sagger is placed in kiln kiln roasting, obtains high fire endurance foamed ceramic finished product.
Wherein, when being burnt into using tunnel oven, firing temperature is 1140 DEG C, firing period 13h.
Embodiment 3
The present embodiment provides a kind of high fire endurance foamed ceramic, formulas are as follows: 93 parts of the red tailing in Luoyuan, 3 parts of spodumene,
2 parts of ooze, 1.5 parts of silicon carbide, 0.5 part of manganese dioxide；
Wherein, the red tailing in Luoyuan is composed of the following components: SiO270.7%, Al2O313.6%, Fe2O31.2%, CaO
1.4%, MgO 0.4%, K2O 5.2%, Na2O 4.5%, LOI 3%；
Ooze is composed of the following components: SiO268.7%, Al2O313.2%, Fe2O33.6%, CaO 2.8%, MgO
2.1%, K2O 4.25%, Na2O 2.15%, LOI 3.2%.
Preparation method are as follows:
(1) various raw materials are uniformly mixed according to formula, obtain mixture；
(2) mixture is subjected to ball milling, obtains slurry；
Wherein, it is 0.3% that the fineness of the slurry, which is that 250 meshes tail over,.
(3) slurry is subjected to mist projection granulating, obtains powder；
(4) the powder cloth is expected among high temperature sagger；
(5) high temperature sagger is placed in kiln kiln roasting, obtains high fire endurance foamed ceramic finished product.
Wherein, it is burnt into using roller kilns, firing temperature is 1160 DEG C, firing period 7.1h.
Embodiment 4
The present embodiment provides a kind of high fire endurance foamed ceramic, formulas are as follows: 93 parts of the red tailing in Luoyuan, 3 parts of lithium porcelain stone,
2 parts of harbour road mud, 1.5 parts of silicon carbide, 0.5 part of manganese dioxide；
Wherein, the red tailing in Luoyuan is composed of the following components: SiO270.7%, Al2O313.6%, Fe2O31.2%, CaO
1.4%, MgO 0.4%, K2O 5.2%, Na2O 4.5%, LOI 3%；
Harbour road mud is composed of the following components: SiO270.9%, Al2O313.1%, Fe2O32.5%, CaO 3.2%, MgO
1.6%, K2O 3.2%, Na2O 1.5%, LOI 4%；
Preparation method is same as Example 3.
Embodiment 5
The present embodiment provides a kind of high fire endurance foamed ceramic, formulas are as follows: 93 parts of the red tailing in Luoyuan, 3 parts of lithium porcelain stone,
0.5 part, 1.5 parts of harbour road mud, 1.5 parts of silicon carbide, 0.5 part of manganese dioxide of Luoyuan sand hill soil；
Wherein, the red tailing in Luoyuan is composed of the following components: SiO270.7%, Al2O313.6%, Fe2O31.2%, CaO
1.4%, MgO 0.4%, K2O 5.2%, Na2O 4.5%, LOI 3%；
Luoyuan sand hill soil is composed of the following components: SiO274.1%, Al2O312.4%, Fe2O31.2%, CaO
0.4%, MgO 0.05%, K2O 4.55%, Na2O 4.3%, LOI 3%；
Harbour road mud is composed of the following components: SiO268.2%, Al2O313.5%, Fe2O32.1%, CaO 3.2%, MgO
1.8%, K2O 4.6%, Na2O 1.6%, LOI 5%；
Preparation method is same as Example 3.
Embodiment 6
The present embodiment provides a kind of high fire endurance foamed ceramic, formulas are as follows: 93 parts of the red tailing in Luoyuan, 3 parts of lithium porcelain stone,
0.5 part, 1.5 parts of harbour road mud, 1.4 parts of silicon carbide, 0.6 part of manganese dioxide of Luoyuan sand hill soil；
Wherein, the red tailing in Luoyuan is composed of the following components: SiO270.7%, Al2O313.6%, Fe2O31.2%, CaO
1.4%, MgO 0.4%, K2O 5.2%, Na2O 4.5%, LOI 3%；
Luoyuan sand hill soil is composed of the following components: SiO274.1%, Al2O312.4%, Fe2O31.2%, CaO
0.4%, MgO 0.05%, K2O 4.55%, Na2O 4.3%, LOI 3%；
Harbour road mud is composed of the following components: SiO268.2%, Al2O313.5%, Fe2O32.1%, CaO 3.2%, MgO
1.8%, K2O 4.6%, Na2O 1.6%, LOI 5%；
Preparation method are as follows:
(1) various raw materials are uniformly mixed according to formula, obtain mixture；
(2) mixture is subjected to ball milling, obtains slurry；
Wherein, it is 0.3% that the fineness of the slurry, which is that 250 meshes tail over,.
(3) slurry is subjected to mist projection granulating, obtains powder；
(4) the powder cloth is expected among high temperature sagger；
(5) high temperature sagger is placed in kiln kiln roasting, obtains high fire endurance foamed ceramic finished product.
Wherein, it is burnt into using roller kilns, firing temperature is 1160 DEG C, firing period 6.8h.
Embodiment 7
The present embodiment provides a kind of high fire endurance foamed ceramics, are formulated same as Example 6.
Preparation method are as follows:
(1) various raw materials are uniformly mixed according to formula, obtain mixture；
(2) mixture is subjected to ball milling, obtains slurry；
Wherein, it is 0.1% that the fineness of the slurry, which is that 250 meshes tail over,.
(3) slurry is subjected to mist projection granulating, obtains powder；
(4) the powder cloth is expected among high temperature sagger；
(5) high temperature sagger is placed in kiln kiln roasting, obtains high fire endurance foamed ceramic finished product.
Wherein, high fire endurance foamed ceramic, sintering curve are burnt into roller kilns are as follows:
From room temperature to 800 DEG C, heating rate is 450 DEG C/h；
From 800 DEG C to 1160 DEG C, heating rate is 250 DEG C/h；
In 1160 DEG C of heat preservation 0.6h；
From 1160 DEG C to 600 DEG C, rate of temperature fall is 600 DEG C/h；
From 600 DEG C to room temperature, rate of temperature fall is 250 DEG C/h.
Embodiment 8
The present embodiment provides a kind of high fire endurance foamed ceramics, and formula is same as Example 6, and preparation method is in addition to burning
It is all the same with embodiment 6 at extra curvature；
The sintering curve of the present embodiment are as follows: from room temperature to 800 DEG C, heating rate is 450 DEG C/h；
From 800 DEG C to 1160 DEG C, heating rate is 250 DEG C/h；
In 1160 DEG C of heat preservation 0.6h；
From 1160 DEG C to 600 DEG C, rate of temperature fall is 850 DEG C/h；
From 600 DEG C to room temperature, rate of temperature fall is 250 DEG C/h.
Foamed ceramic in embodiment 1-7 is detected, wherein surveyed using the method for GB/T 9978.8-2008 defined
Fire endurance is tried, other performances are tested using the method for defined in JGT 511-2017；Test result is as follows shown in table:
As can be seen from the above table, by the synergistic effect of the raw materials and preparation process such as the red tailing in Luoyuan, lithium-containing compound, clay,
Fire endurance >=2h, compression strength >=7MPa has been prepared in the present invention, and bulk density is 200~450kg/m3, thermal coefficient
≤ 0.13W/m DEG C, fire endurance >=1h, combustion rating is A1 grades, water absorption rate≤0.5%, IRa≤ 1.0, Ir≤ 1.0 foaming pottery
Porcelain.
The above is the preferred embodiment of invention, it is noted that those skilled in the art are come
It says, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as this
The protection scope of invention.
Claims (10)
1. a kind of high fire endurance foamed ceramic, which is characterized in that it is mainly made of raw material from the following weight:
90~95 parts of the red tailing in Luoyuan, 1~5 part of lithium compound, 1~3 part of clay, 0.5~3 part of foaming agent, stabilizer 0.2~1
Part；
The sum of each raw material component parts by weight are 100 parts；
Wherein, the lithium compound selects spodumene, lithium porcelain stone, lepidolite, montebrasite, petalite, lepidolite, iron lithium cloud
One of mother is a variety of.
2. high fire endurance foamed ceramic as described in claim 1, which is characterized in that the red tailing in Luoyuan is mainly by following
The group of weight percent is grouped as: SiO268~73%, Al2O312~15%, Fe2O31.2~2%, CaO 0.5~1.5%,
MgO 0.2~0.5%, K2O 5~5.5%, Na2O 3~5%, LOI 0.5~3%.
3. high fire endurance foamed ceramic as described in claim 1, which is characterized in that the lithium compound selects lithium porcelain stone
And/or spodumene.
4. high fire endurance foamed ceramic as described in claim 1, which is characterized in that the clay selection Luoyuan sand hill soil,
One of mud washing, black mud, harbour road mud or ooze are a variety of.
5. high fire endurance foamed ceramic as claimed in claim 4, which is characterized in that the Luoyuan sand hill soil is mainly by following
The group of weight percent is grouped as: SiO270~75%, Al2O312~16%, Fe2O30.5~1.5%, CaO 0.3~
0.5%, MgO 0.01~0.1%, K2O 4~6%, Na2O 3~5%, LOI 1~5%；
The mud washing mainly consists of the following components in percentage by weight: SiO245~50%, Al2O332~36%, Fe2O3
2~3%, CaO 0.01~0.1%, MgO 0.3~0.5%, K2O 2~3%, Na2O 0.3~0.8%, LOI 8~12%；
The black mud mainly consists of the following components in percentage by weight: SiO261~65%, Al2O320~24%, Fe2O3
1.5~3%, CaO 0.3~1%, MgO 0.3~0.5%, K2O 1~2%, Na2O 0.2~0.6%, LOI 5~10%；
The harbour road mud mainly consists of the following components in percentage by weight: SiO268~72%, Al2O312~15%, Fe2O3
2~3%, CaO 3~5%, MgO 1.5~3%, K2O 3.5~5%, Na2O 1.5~3.5%, LOI 1~8%；
The ooze mainly consists of the following components in percentage by weight: SiO268~72%, Al2O311~14%, Fe2O3 3
~4%, CaO 2~3.5%, MgO 1.5~2.5%, K2O 3~5%, Na2O 1~3%, LOI 3~10%.
6. high fire endurance foamed ceramic as described in claim 1, which is characterized in that the foaming agent selects silicon carbide, carbon
One of powder or ceramic abrading block reclaimed materials are a variety of；The stabilizer selects manganese dioxide.
7. high fire endurance foamed ceramic as claimed in any one of claims 1 to 6, which is characterized in that the high fire endurance hair
Fire endurance >=2h of ceramics is steeped, combustion rating is A1 grades, and compression strength >=7MPa, bulk density is 200~450kg/m3, lead
Hot coefficient≤0.13W/m DEG C, water absorption rate≤0.5%, IRa≤ 1.0, Ir≤1.0。
8. a kind of preparation method of such as described in any item high fire endurance foamed ceramics of claim 1-7, which is characterized in that packet
It includes:
(1) various raw materials are uniformly mixed according to formula, obtain mixture；
(2) mixture is subjected to ball milling, obtains slurry；
(3) slurry is subjected to mist projection granulating, obtains powder；
(4) the powder cloth is expected among high temperature sagger；
(5) high temperature sagger is placed in kiln, according to default sintering curve be burnt into, obtain high fire endurance foamed ceramic at
Product.
9. the preparation method of high fire endurance foamed ceramic described in right 8, which is characterized in that the firing temperature is 1120
~1160 DEG C, firing period is 5~13h；
The sintering curve are as follows:
From room temperature to 800 DEG C, using the heating rate of 400~500 DEG C/h；
From 800 DEG C to firing temperature, using the heating rate of 200~250 DEG C/h；
0.5~1.5h is kept the temperature in firing temperature；
From firing temperature to 600 DEG C, using the rate of temperature fall of 500~1000 DEG C/h；
From 600 DEG C to room temperature, using the rate of temperature fall of 200~300 DEG C/h.
10. the preparation method of high fire endurance foamed ceramic as claimed in claim 8, which is characterized in that in step (2), institute
The fineness for stating slurry is that 250 meshes tail over < 0.5%.
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