CN105063280A - Slagging medium and preparation method thereof - Google Patents
Slagging medium and preparation method thereof Download PDFInfo
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- CN105063280A CN105063280A CN201510522288.3A CN201510522288A CN105063280A CN 105063280 A CN105063280 A CN 105063280A CN 201510522288 A CN201510522288 A CN 201510522288A CN 105063280 A CN105063280 A CN 105063280A
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- slag
- quartz sand
- preparation
- magnesium reduction
- slag former
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a slagging medium and a preparation method thereof. Raw materials of the slagging medium are composed of following ingredients of magnesium reduction slag, quartz sand and fluorite. The slagging medium comprises effective ingredients of, by weight, 20%-40% of CaO, 25%-40% of SiO2, 12%-30% of CaF2 and the balance impurities. The slagging medium can be used for external refining of ferrosilicon, and silicon iron low in aluminum content can be obtained; according to the preparation method, the reduction slag produced by magnesium smelting is fully used, so that the cost is reduced, and the environment is protected.
Description
[technical field]
The invention belongs to and smelt auxiliary material technical field, being specifically related to a kind of take magnesium reduction slag as ferrosilicon refining slag former of raw material and preparation method thereof.
[background technology]
Ferrosilicon is main in steel-making is used as reductor and alloy addition, is not generally strict with the content controlling aluminium, but, along with the exploitation of electrical steel or special steel grade, then require more and more stricter to the aluminum content in ferrosilicon additive.Therefore, domestic and international many ferrosilicon manufacturers and R&D institution are devoted to the R & D and manufacture of low aluminium alloy.Take foreign matter content low at first, the raw material production high purity ferrosilicon that purity is high, but use the raw material of purity business to smelt more difficult constantly and cost is high, so develop the method for external refining.The normal method adopted is synthetic slag oxidation style both at home and abroad.
Synthetic slag oxidation style is incorporating selectively oxidation mechanisms, mixes slag making, make aluminium in ferrosilicon be oxidized to Al to greatest extent in the ferrosilicon water selecting suitable slag former to add to come out of the stove
2o
3rear removal, reduces the oxidational losses of silicon simultaneously as far as possible, has reached and has fallen the object that aluminium protects silicon.
Magnesium reduction slag is the solid waste that MAGNESIUM METAL factory discharges in refining magnesium process.The technique of production MAGNESIUM METAL is roughly as follows: by rhombspar (MgCO
3caCO
3) calcination in rotary kiln (calcining temperature is 1150 ~ 1250 DEG C), then mix with ferrosilicon powder (siliceous 75%) and Fluorspar Powder (fluorinated calcium 95%) after pulverizing, ball processed, send in high temperature steel reductive jar, crude magnesium is produced with reduction at the temperature of 1190 ~ 1210 DEG C and 1.33 ~ 10Pa vacuum condition in reduction furnace, again through flux-refining, ingot casting, surface treatment, namely metal magnesium ingot is obtained, remaining residue is magnesium reduction slag, and magnesium slag main component is CaO and SiO
2.At present, the process of magnesium reduction slag brings very large problem, and magnesium reduction slag is disposed and is generally air storage, and heap rally takies large-area soil also can cause severe contamination to surrounding environment simultaneously.
Therefore, be necessary the recycle utilization studying magnesium reduction slag, improve the added value that magnesium reduction slag utilizes, solve the problem of environmental pollution that magnesium reduction slag brings.
[summary of the invention]
The object of the present invention is to provide a kind of magnesium slag that utilizes as the ferrosilicon external refining slag former of raw material, this slag former is used for the external refining of ferrosilicon, the aluminium foreign matter content in the ferrosilicon that can effectively reduce.
Object of the present invention is achieved through the following technical solutions: provide a kind of slag former, and its raw material comprises magnesium reduction slag, quartz sand and fluorite, it is characterized in that, the effective constituent containing following weight percents in described slag former: CaO20% ~ 40%; SiO
225% ~ 40%, CaF
212% ~ 30%, remaining is impurity.
Further, the granularity of described quartz sand is not more than 10mm.
Further, the moisture content of described quartz sand is less than 0.5%.
The present invention also aims to provide a kind of magnesium slag that utilizes as the preparation method of the ferrosilicon external refining slag former of raw material, slag former prepared by the method can be used for the external refining of ferrosilicon, the aluminium foreign matter content in the ferrosilicon that can effectively reduce.
For achieving the above object, the invention provides a kind of preparation method of slag former, its step comprises:
(1) quartzite or quartz sand powder are broken to granularity and are less than 10mm, heating is baked to moisture and is less than 0.5%;
(2) with the magnesium reduction slag of 80um ~ 495um hole pattern sieve sieve through cooling, taking lower part of screen and dividing;
(3) by the quartz sand of step 1, the magnesium reduction slag of step 2 and the materials such as Fluorspar Powder in proportion ingredients mix;
(4) load moisture barrier bag sealing and be finished product.
Further, the composition of the ratio by mass per-cent in described step 3 consists of: magnesium reduction slag 43% ~ 85%, quartz sand 5% ~ 29%, fluorite 10% ~ 28%, and all the other are impurity.
Further, the effective constituent of the mixture of described step 3 gained by weight percentage consist of CaO20% ~ 40%; SiO
225% ~ 40%, CaF
212% ~ 30%, all the other are impurity.
Further, the granularity of described quartz sand is for being not more than 2mm.
The invention has the beneficial effects as follows: this slag former is used for refining ferrosilicon, the foreign matter content such as aluminium, phosphorus in the ferrosilicon effectively reduced, and fully utilized magnesium reduction slag, effectively reduce environmental pollution.
[embodiment]
Embodiment 1:
Utilize the slag former that magnesium reduction slag is raw material, its starting material also comprise quartz sand and fluorite.Wherein, the effective constituent containing following weight percents in described slag former: CaO20 ~ 30%, SiO
225 ~ 40%, CaF
222 ~ 30%, all the other are impurity.Preferably, in order to obtain the per-cent of aforementioned effective constituent, described starting material are grouped into by the one-tenth of following weight percents: magnesium reduction slag 43 ~ 65%, quartz sand 14 ~ 29%, fluorite 10 ~ 28%, and all the other are impurity.
In order to obtain above-mentioned slag former, a kind of preparation method of slag former being now provided, the steps include:
(1) quartzite or quartz sand powder are broken to granularity and are less than 10mm, be beneficial to quartz sand and melt in time in red-hot molten iron, with iron impurities in water generation chemical reaction, heating is baked to moisture and is less than 0.5%;
(2) with the magnesium reduction slag of 495um hole screen filtration through cooling, macrobead (main component is MgO) can be filtered out, select the small-particle part under sieve, avoid MgO to bring in refined alloy as far as possible, cause alloy quality to decline.
(3) quartz sand of step 1, the magnesium reduction slag of step 2 are prepared burden by aforementioned ratio with Fluorspar Powder etc. mix;
(4) step 3 gained mixture is loaded moisture barrier bag sealing and be finished product.
The slag former prepared by this embodiment is for refined silicon iron alloy, about can effectively reducing the content to 0.5% of the aluminium in ferrosilicon, in addition, found by checking, the quartzite in the present embodiment or quartz sand powder are broken to granularity and are less than 2mm and can obtain better refining effect.Meanwhile, use the slag former prepared of embodiment also can play to reduce the content of the impurity such as such as phosphorus in ferrosilicon, can select as preferably auxiliary material when smelting steel, and fully utilize magnesium reduction slag, reduce environmental pollution.
Embodiment 2:
Utilize the slag former that magnesium reduction slag is raw material, its starting material are grouped into by the one-tenth of following weight percents: magnesium reduction slag 65 ~ 85%, quartz sand 5 ~ 15%, fluorite 10 ~ 22%, and all the other are impurity.By the configuration of aforementioned proportion, the effective constituent of following weight percent finally can be obtained: CaO30 ~ 40%, SiO
225 ~ 40%, CaF
212 ~ 25%, all the other are impurity.The present invention is also to provide a kind of preparation method producing described slag former, the steps include:
(1) quartzite or quartz sand powder are broken to granularity and are less than 10mm, be beneficial to quartz sand and melt in time in red-hot molten iron, with iron impurities in water generation chemical reaction, heating is baked to moisture and is less than 0.5%;
(2) with the magnesium reduction slag of 80um hole pattern sieve sieve through cooling, macrobead (macrobead main component is MgO) can be filtered out, take lower part of screen and divide, avoiding MgO to bring in refined alloy, cause alloy quality to decline.
(3) magnesium reduction slag of the quartz sand of step 1, step 2 is prepared burden in proportion with Fluorspar Powder etc. mix;
(4) mixture obtained in step 3 is loaded moisture barrier bag sealing and be finished product.
The slag former prepared by this embodiment is for refined silicon iron alloy, about can effectively reducing the content to 0.1% of the aluminium in ferrosilicon, in addition, found by checking, the quartzite in the present embodiment or quartz sand powder are broken to granularity and are less than 2mm and can obtain better refining effect.Meanwhile, use the slag former prepared of embodiment also can play to reduce the content of the impurity such as such as phosphorus in ferrosilicon, can select as preferably auxiliary material when smelting steel, and fully utilize magnesium reduction slag, considerably reduce pollution on the environment.
Claims (7)
1. a slag former, its moiety comprises magnesium reduction slag, quartz sand and fluorite, it is characterized in that, the effective constituent containing following weight percents in described slag former: CaO20% ~ 40%; SiO
225% ~ 40%, CaF
212% ~ 30%, all the other are impurity.
2. a kind of slag former as claimed in claim 1, is characterized in that, the granularity of described quartz sand is for being not more than 10mm.
3. a kind of slag former as claimed in claim 1, is characterized in that, the moisture content of described quartz sand is less than 0.5%.
4. a preparation method for slag former, comprises the following steps:
(1) quartzite or quartz sand powder are broken to granularity and are less than 10mm, heating is baked to moisture and is less than 0.5%;
(2) with the magnesium reduction slag of 80um ~ 495um hole pattern sieve sieve through cooling, taking lower part of screen and dividing;
(3) by step 1 gained quartz sand, step 2 gained magnesium reduction slag and Fluorspar Powder in proportion ingredients mix;
(4) mixture in step 3 is loaded moisture barrier bag sealing and be finished product.
5. preparation method as claimed in claim 5, it is characterized in that, the composition of the ratio by mass per-cent in described step 3 consists of: magnesium reduction slag 43% ~ 85%, quartz sand 5% ~ 29%, fluorite 10% ~ 28%, and all the other are impurity.
6. preparation method as claimed in claim 5, is characterized in that, the effective constituent of the mixture of described step 3 gained by weight percentage consist of CaO20% ~ 40%; SiO
225% ~ 40%, CaF
212% ~ 30%, all the other are impurity.
7. preparation method as claimed in claim 5, it is characterized in that, the granularity of described quartz sand is for being not more than 2mm.
Priority Applications (1)
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|---|---|---|---|
| CN201510522288.3A CN105063280A (en) | 2015-08-24 | 2015-08-24 | Slagging medium and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108715972A (en) * | 2018-06-19 | 2018-10-30 | 青海百通高纯材料开发有限公司 | A kind of low-phosphorous silicon iron product and its smelting process |
| CN109439845A (en) * | 2018-12-26 | 2019-03-08 | 武汉如星科技有限公司 | A kind of cord steel slug type calcium magnesium silicate refining slag and preparation method thereof |
| CN111304523A (en) * | 2020-03-31 | 2020-06-19 | 西安宏信矿热炉有限公司 | Production process of low-aluminum ferrosilicon |
| CN112375874A (en) * | 2020-10-23 | 2021-02-19 | 鄂尔多斯市西金矿冶有限责任公司 | Refining slag composition for ferrosilicon external furnace refining with aluminum content less than 0.1% |
| CN113502372A (en) * | 2021-05-26 | 2021-10-15 | 山东鲁丽钢铁有限公司 | Rapid white slag making material for 120tLF refining furnace and process |
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| CN101126133A (en) * | 2007-09-24 | 2008-02-20 | 昆明理工大学 | Method for reclaiming valuable element from zinc kiln slag |
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| CN101844768A (en) * | 2010-05-20 | 2010-09-29 | 厦门大学 | Method for removing phosphorus and boron from metallurgical-grade silicon |
| CN101914651A (en) * | 2010-08-19 | 2010-12-15 | 遵化市励拓环保科技有限公司 | Converter or electric furnace steel-making slagging agent and preparation process thereof |
| CN102139880A (en) * | 2011-05-16 | 2011-08-03 | 大连隆田科技有限公司 | Method for removing impurity boron in polycrystalline silicon by electron beam slagging smelting |
| CN102212821A (en) * | 2011-05-26 | 2011-10-12 | 山东大学 | Method for preparing reinforced tungsten carbide abrasion-resistant composite plate |
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2015
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Patent Citations (6)
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|---|---|---|---|---|
| CN101126133A (en) * | 2007-09-24 | 2008-02-20 | 昆明理工大学 | Method for reclaiming valuable element from zinc kiln slag |
| CN101555538A (en) * | 2009-04-30 | 2009-10-14 | 爱德洛（北京）科技有限公司 | Production technique for smelting low-manganese pig iron |
| CN101844768A (en) * | 2010-05-20 | 2010-09-29 | 厦门大学 | Method for removing phosphorus and boron from metallurgical-grade silicon |
| CN101914651A (en) * | 2010-08-19 | 2010-12-15 | 遵化市励拓环保科技有限公司 | Converter or electric furnace steel-making slagging agent and preparation process thereof |
| CN102139880A (en) * | 2011-05-16 | 2011-08-03 | 大连隆田科技有限公司 | Method for removing impurity boron in polycrystalline silicon by electron beam slagging smelting |
| CN102212821A (en) * | 2011-05-26 | 2011-10-12 | 山东大学 | Method for preparing reinforced tungsten carbide abrasion-resistant composite plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108715972A (en) * | 2018-06-19 | 2018-10-30 | 青海百通高纯材料开发有限公司 | A kind of low-phosphorous silicon iron product and its smelting process |
| CN109439845A (en) * | 2018-12-26 | 2019-03-08 | 武汉如星科技有限公司 | A kind of cord steel slug type calcium magnesium silicate refining slag and preparation method thereof |
| CN111304523A (en) * | 2020-03-31 | 2020-06-19 | 西安宏信矿热炉有限公司 | Production process of low-aluminum ferrosilicon |
| CN112375874A (en) * | 2020-10-23 | 2021-02-19 | 鄂尔多斯市西金矿冶有限责任公司 | Refining slag composition for ferrosilicon external furnace refining with aluminum content less than 0.1% |
| CN113502372A (en) * | 2021-05-26 | 2021-10-15 | 山东鲁丽钢铁有限公司 | Rapid white slag making material for 120tLF refining furnace and process |
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Application publication date: 20151118 |
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