CN103553578A - Air brick fired at low temperature by using gel and preparation process thereof - Google Patents
Air brick fired at low temperature by using gel and preparation process thereof Download PDFInfo
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- CN103553578A CN103553578A CN201310501781.8A CN201310501781A CN103553578A CN 103553578 A CN103553578 A CN 103553578A CN 201310501781 A CN201310501781 A CN 201310501781A CN 103553578 A CN103553578 A CN 103553578A
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Abstract
The invention relates to an air brick fired at low temperature by using a gel and a preparation process of the air brick. The raw materials of the air brick include an aggregate and a fine powder, wherein the weight ratio of the aggregate to the fine powder is 6.5:3.5-7:3; the alumina gel fine powder is used as a binding agent; due to the addition of the alumina gel particle having quite high chemical activity into the air brick in the firing process of the air brick at the temperature being lower than 800 DEG C, the air brick body has high strength; the addition of chromium sesquioxide fine powder can effectively improve the capacities of resisting the permeability of molten steel and the erosion by the steel slag in the use process of the air brick, so as to ensure the good application performance of the air brick; and the firing temperature of the air brick provided by the invention is controlled at 500-800 DEG C, but the firing temperature of a traditional air brick is generally higher than 1300 DEG C, and therefore, the cost of the fuel gas can be saved by about 60% and the firing time can be shortened by about 50%.
Description
Technical field
The present invention relates to bottom-blown air brick brick core preparation technology for a kind of iron and steel metallurgical industry ladle refining, specifically a kind of gel is in conjunction with easy fired gas permeable brick and preparation technology thereof.
Background technology
Ladle bottom air blowing treatment is the degassed furnace outer refining process with removing non-metallic inclusion of a kind of easy molten steel, this mode stirs by pass into gas in molten steel, acceleration realizes metallurgical process, even liquid steel temperature and chemical composition, the form of promotion inclusion removal or control inclusion.To being blown into gas in molten steel, can obtain by two kinds of modes, a kind of is to adopt air blow gun, inserts the molten steel operation of blowing from ladle top; Another kind is to adopt the gas permeable brick that is arranged in ladle bottom, from ladle bottom, gas is sent into, and wherein bottom-blown air brick mode is more convenient, effective, thereby is widely used.
Gas permeable brick is as the important functional original paper of refining process, its in the course of the work safe and reliable use to guarantee refining process continue play an important role; In gas permeable brick use procedure major requirement its have and use the performances such as stable, blowing rate is high.
At present, for guaranteeing have good hot strength and flushing resistance generally need to adopt higher temperature (1300 ℃ of >) to fire in working strength tradition gas permeable brick production process, utilize that material density after high temperature sintering is high, high-temperature behavior good and resistance to molten steel the feature such as washes away it is had a wide range of applications in ladle refining furnace, but this gas permeable brick produce and use procedure in the following problem of ubiquity:
1. the manufacture craft production cycle is long, power consumption is large;
2. because sintering degree is higher, the phase interface of material internal buffering thermal stresses is less, and the ability that cushions discontinuous operation generation built-in thermal stress in gas permeable brick use procedure is poor, causes that its thermostability reduces and causes gas permeable brick to lose efficacy in advance.
Summary of the invention
As above problem for gas permeable brick in prior art and production technique existence, the invention provides a kind of gel in conjunction with easy fired gas permeable brick and preparation technology thereof.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 27-35 part granularity, the plate diamond spar that 10-18 part granularity is 3-1mm, the plate diamond spar that 8-13 part granularity is 1-0.5mm, the plate diamond spar that 8-12 part granularity is 0.5-0mm and 4-9 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 3-8 part 325 object plate diamond spars, 7-11 part 325 object spinel fine powders, 2-5 part alumina gel fine powder, 3-14 part Reactive alumina, 2-5 part 200 object chromium sesquioxide fine powders and 0.1-0.8 part water reducer form,
Described water reducer is peace ADS advanced in years or ADW series of high efficiency water reducer;
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 500 ℃-800 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Beneficial effect of the present invention:
The present invention uses alumina gel fine powder as bonding agent, utilize the chemically reactive that gel particles is higher, add in gas permeable brick to make gas permeable brick body produce higher intensity when 800 ℃ of < burn till, demoulding folding strength (110 ℃ of X24h) > 6Mpa, compressive strength > 60Mpa, (1550 ℃ of X3h) folding strength > 26Mpa after burning, compressive strength > 120Mpa after burning, adding of chromium sesquioxide fine powder can effectively improve the perviousness of anti-molten steel and the aggressiveness of anti-slag in gas permeable brick use procedure, and then guarantee that gas permeable brick has good use properties,
Gas permeable brick firing temperature of the present invention is controlled at 500-800 ℃, and traditional gas permeable brick firing temperature is generally greater than 1300 ℃, can save by comparison combustion gas cost approximately 60% left and right, and firing time can shorten 50% left and right;
The prepared gas permeable brick of the present invention is compared with traditional gas permeable brick obvious thermostability advantage in use procedure, can effectively improve gas permeable brick work-ing life, the prepared gas permeable brick of this method gas permeable brick high life approximately 5 stoves left and right that comparable traditional preparation method is produced in 220 tons of ladle use procedures of certain steel mill at home;
The gel of manufacturing of the present invention is compared with traditional gas permeable brick in conjunction with easy fired gas permeable brick, has the features such as good air permeability, thermostability is high, gas permeable brick use is stable; The advantages such as have gas consumption in preparation technology few, cost of manufacture is low, and fabrication cycle is short.
Embodiment
Below in conjunction with embodiment, the present invention is further elaborated.
Embodiment 1
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 27-30 part granularity, the plate diamond spar that 15-18 part granularity is 3-1mm, the plate diamond spar that 9-13 part granularity is 1-0.5mm, the plate diamond spar that 8-10 part granularity is 0.5-0mm and 6-9 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 5-8 part 325 object plate diamond spars, 7-10 part 325 object spinel fine powders, 3-5 part alumina gel fine powder, 3-9 part Reactive alumina, 2-3 part 200 object chromium sesquioxide fine powders and 0.1-0.4 part peace step ADS water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 500 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Gas permeable brick prepared by the present embodiment, physical and chemical index is as follows:
Demoulding folding strength (110 ℃ of X24h) > 6Mpa, compressive strength > 60Mpa;
Folding strength (1550 ℃ of X3h) > 26Mpa after burning, compressive strength > 120Mpa after burning.
Embodiment 2
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 27-30 part granularity, the plate diamond spar that 15-18 part granularity is 3-1mm, the plate diamond spar that 9-13 part granularity is 1-0.5mm, the plate diamond spar that 8-10 part granularity is 0.5-0mm and 6-9 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 5-8 part 325 object plate diamond spars, 7-10 part 325 object spinel fine powders, 3-5 part alumina gel fine powder, 3-9 part Reactive alumina, 2-3 part 200 object chromium sesquioxide fine powders and 0.1-0.4 part peace step ADW water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 800 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 3
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 30-35 part granularity, the plate diamond spar that 10-15 part granularity is 3-1mm, the plate diamond spar that 9-13 part granularity is 1-0.5mm, the plate diamond spar that 10-12 part granularity is 0.5-0mm and 4-6 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 5-8 part 325 object plate diamond spars, 7-10 part 325 object spinel fine powders, 2-3 part alumina gel fine powder, 9-14 part Reactive alumina, 3-5 part 200 object chromium sesquioxide fine powders and 0.1-0.4 part peace step ADW water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 500 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 4
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 30-35 part granularity, the plate diamond spar that 10-15 part granularity is 3-1mm, the plate diamond spar that 9-13 part granularity is 1-0.5mm, the plate diamond spar that 10-12 part granularity is 0.5-0mm and 4-6 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 5-8 part 325 object plate diamond spars, 7-10 part 325 object spinel fine powders, 2-3 part alumina gel fine powder, 9-14 part Reactive alumina, 3-5 part 200 object chromium sesquioxide fine powders and 0.1-0.4 part peace step ADS water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 800 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 5
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 30-35 part granularity, the plate diamond spar that 10-15 part granularity is 3-1mm, the plate diamond spar that 8-9 part granularity is 1-0.5mm, the plate diamond spar that 8-10 part granularity is 0.5-0mm and 6-9 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 3-5 part 325 object plate diamond spars, 10-11 part 325 object spinel fine powders, 3-5 part alumina gel fine powder, 9-14 part Reactive alumina, 2-3 part 200 object chromium sesquioxide fine powders and 0.1-0.4 part peace step ADS water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 500 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 6
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 30-35 part granularity, the plate diamond spar that 10-15 part granularity is 3-1mm, the plate diamond spar that 8-9 part granularity is 1-0.5mm, the plate diamond spar that 8-10 part granularity is 0.5-0mm and 6-9 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 3-5 part 325 object plate diamond spars, 10-11 part 325 object spinel fine powders, 3-5 part alumina gel fine powder, 9-14 part Reactive alumina, 2-3 part 200 object chromium sesquioxide fine powders and 0.1-0.4 part peace step ADS water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 800 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 7
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 27-30 part granularity, the plate diamond spar that 15-18 part granularity is 3-1mm, the plate diamond spar that 8-9 part granularity is 1-0.5mm, the plate diamond spar that 10-12 part granularity is 0.5-0mm and 4-6 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 3-5 part 325 object plate diamond spars, 10-11 part 325 object spinel fine powders, 2-3 part alumina gel fine powder, 3-9 part Reactive alumina, 3-5 part 200 object chromium sesquioxide fine powders and 0.4-0.8 part peace step ADS water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 600 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 8
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 27-30 part granularity, the plate diamond spar that 15-18 part granularity is 3-1mm, the plate diamond spar that 8-9 part granularity is 1-0.5mm, the plate diamond spar that 10-12 part granularity is 0.5-0mm and 4-6 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 3-5 part 325 object plate diamond spars, 10-11 part 325 object spinel fine powders, 2-3 part alumina gel fine powder, 3-9 part Reactive alumina, 3-5 part 200 object chromium sesquioxide fine powders and 0.4-0.8 part peace step ADW water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 800 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 9
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 30-35 part granularity, the plate diamond spar that 10-15 part granularity is 3-1mm, the plate diamond spar that 8-9 part granularity is 1-0.5mm, the plate diamond spar that 10-12 part granularity is 0.5-0mm and 4-6 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 5-8 part 325 object plate diamond spars, 7-10 part 325 object spinel fine powders, 3-5 part alumina gel fine powder, 9-14 part Reactive alumina, 2-3 part 200 object chromium sesquioxide fine powders and 0.1-0.4 part peace step ADS water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 500 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 10
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 30-35 part granularity, the plate diamond spar that 10-15 part granularity is 3-1mm, the plate diamond spar that 8-9 part granularity is 1-0.5mm, the plate diamond spar that 10-12 part granularity is 0.5-0mm and 4-6 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 5-8 part 325 object plate diamond spars, 7-10 part 325 object spinel fine powders, 3-5 part alumina gel fine powder, 9-14 part Reactive alumina, 2-3 part 200 object chromium sesquioxide fine powders and 0.1-0.4 part peace step ADW water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 700 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 11
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 27-30 part granularity, the plate diamond spar that 15-18 part granularity is 3-1mm, the plate diamond spar that 9-13 part granularity is 1-0.5mm, the plate diamond spar that 8-10 part granularity is 0.5-0mm and 6-9 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 3-5 part 325 object plate diamond spars, 10-11 part 325 object spinel fine powders, 2-3 part alumina gel fine powder, 3-9 part Reactive alumina, 3-5 part 200 object chromium sesquioxide fine powders and 0.4-0.8 part peace step ADW water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 500 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Embodiment 12
A kind of gel is in conjunction with easy fired gas permeable brick, aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 27-30 part granularity, the plate diamond spar that 15-18 part granularity is 3-1mm, the plate diamond spar that 9-13 part granularity is 1-0.5mm, the plate diamond spar that 8-10 part granularity is 0.5-0mm and 6-9 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 3-5 part 325 object plate diamond spars, 10-11 part 325 object spinel fine powders, 2-3 part alumina gel fine powder, 3-9 part Reactive alumina, 3-5 part 200 object chromium sesquioxide fine powders and 0.4-0.8 part peace step ADS water reducer and form.
Prepare a technique for gas permeable brick as mentioned above, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 800 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
Claims (3)
1. a gel is in conjunction with easy fired gas permeable brick, it is characterized in that: aggregate and fine powder that its raw material is 6.5:3.5 ~ 7:3 by weight ratio form, count by weight, the plate diamond spar that described aggregate is 6-3mm by 27-35 part granularity, the plate diamond spar that 10-18 part granularity is 3-1mm, the plate diamond spar that 8-13 part granularity is 1-0.5mm, the plate diamond spar that 8-12 part granularity is 0.5-0mm and 4-9 part granularity are that 0.5-0mm spinel particle forms, described fine powder is by 3-8 part 325 object plate diamond spars, 7-11 part 325 object spinel fine powders, 2-5 part alumina gel fine powder, 3-14 part Reactive alumina, 2-5 part 200 object chromium sesquioxide fine powders and 0.1-0.8 part water reducer form.
2. gel as claimed in claim 1, in conjunction with easy fired gas permeable brick, is characterized in that: described water reducer is peace ADS advanced in years or ADW series of high efficiency water reducer.
3. prepare a technique for gas permeable brick as claimed in claim 1, it is characterized in that, comprise the following steps:
Step 1: after aggregate and powder being mixed according to described composition and ratio, add the water of 3.8-4.5 weight part, make adobe after mixing;
Step 2: by adobe maintenance under room temperature condition, ambient moisture is controlled at 70-80%;
Step 3: the adobe after maintenance is dry at the temperature of 200-300 ℃;
Step 4: adobe is put into kiln, with the temperature rise rate of 25 ℃/h, furnace temperature is warming up to 500 ℃-800 ℃, insulation 5h, then naturally cools to room temperature, obtains gas permeable brick.
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| CN103896612A (en) * | 2014-03-17 | 2014-07-02 | 马鞍山市鑫海耐火材料有限责任公司 | Chromium-free magnesium aluminum ramming material for RH furnace bottom |
| CN103896611A (en) * | 2014-03-14 | 2014-07-02 | 濮阳濮耐高温材料（集团）股份有限公司 | Air brick with high blowing through rate and manufacturing method thereof |
| CN105645977A (en) * | 2016-01-08 | 2016-06-08 | 洛阳利尔耐火材料有限公司 | Air brick for special steel refining and preparation method thereof |
| CN106278304A (en) * | 2016-07-29 | 2017-01-04 | 山西高科耐火材料股份有限公司 | A kind of intermediate frequency furnace lining and preparation method thereof |
| CN107935571A (en) * | 2017-10-18 | 2018-04-20 | 浙江科特高温新材料有限公司 | The formula and preparation process of a kind of stainless steel smelting high-performance air brick |
| CN110066906A (en) * | 2019-06-06 | 2019-07-30 | 洛阳利尔耐火材料有限公司 | A kind of one-pass molding integral air brick, molding die and forming method |
| CN116283249A (en) * | 2022-12-22 | 2023-06-23 | 鞍山钢铁冶金炉材科技有限公司 | Ladle nozzle pocket brick thermal state repairing material and preparation and use methods thereof |
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| CN103896611A (en) * | 2014-03-14 | 2014-07-02 | 濮阳濮耐高温材料（集团）股份有限公司 | Air brick with high blowing through rate and manufacturing method thereof |
| CN103896611B (en) * | 2014-03-14 | 2016-03-02 | 濮阳濮耐高温材料（集团）股份有限公司 | A kind of high through-blowing rate gas permeable brick and manufacture method thereof |
| CN103896612A (en) * | 2014-03-17 | 2014-07-02 | 马鞍山市鑫海耐火材料有限责任公司 | Chromium-free magnesium aluminum ramming material for RH furnace bottom |
| CN103896612B (en) * | 2014-03-17 | 2016-03-30 | 马鞍山市鑫海耐火材料有限责任公司 | A kind of RH stove furnace bottom Chrome-free magnalium matter ramming mass |
| CN105645977A (en) * | 2016-01-08 | 2016-06-08 | 洛阳利尔耐火材料有限公司 | Air brick for special steel refining and preparation method thereof |
| CN106278304A (en) * | 2016-07-29 | 2017-01-04 | 山西高科耐火材料股份有限公司 | A kind of intermediate frequency furnace lining and preparation method thereof |
| CN107935571A (en) * | 2017-10-18 | 2018-04-20 | 浙江科特高温新材料有限公司 | The formula and preparation process of a kind of stainless steel smelting high-performance air brick |
| CN110066906A (en) * | 2019-06-06 | 2019-07-30 | 洛阳利尔耐火材料有限公司 | A kind of one-pass molding integral air brick, molding die and forming method |
| CN116283249A (en) * | 2022-12-22 | 2023-06-23 | 鞍山钢铁冶金炉材科技有限公司 | Ladle nozzle pocket brick thermal state repairing material and preparation and use methods thereof |
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