CN111676370A - Process for producing high-silicon low-aluminum-silicon-calcium alloy by novel submerged arc furnace - Google Patents
Process for producing high-silicon low-aluminum-silicon-calcium alloy by novel submerged arc furnace Download PDFInfo
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- CN111676370A CN111676370A CN202010556005.8A CN202010556005A CN111676370A CN 111676370 A CN111676370 A CN 111676370A CN 202010556005 A CN202010556005 A CN 202010556005A CN 111676370 A CN111676370 A CN 111676370A
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Abstract
The invention discloses a novel submerged arc furnace process for producing a high-silicon low-aluminum-silicon-calcium alloy, which comprises the following components in parts by weight: 1500-1600kg, limestone: 900-950kg, semi coke: 650-680kg, bituminous coal: 600-650kg, silicon slag: 200-300kg, the process comprises the following steps: weighing the silica, limestone, semi-coke, bituminous coal and silica slag according to a certain proportion; mixing the materials in sequence, and adding the materials into a submerged arc furnace in batches according to the proportion; heating with high current in a submerged arc furnace; the process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace has the advantages that the furnace life cycle is prolonged from 10 months to 18 months, furnace building raw materials are saved, the furnace building times are reduced, the labor intensity of workers is reduced, the production efficiency is improved, and meanwhile, the quality of products prepared by the process is remarkably improved: 58 percent of Si is increased to 60 percent, 28 percent of Ca is increased to 29 percent, Al is less than or equal to 1.25 percent, and C is less than or equal to 0.4 percent; and the yield is improved: the daily yield is as follows: the 36 tons is improved to 40-45 tons, and the practicability is realized.
Description
Technical Field
The invention belongs to the field of high-silicon low-aluminum-silicon-calcium alloy processing, and particularly relates to a process for producing a high-silicon low-aluminum-silicon-calcium alloy by a novel submerged arc furnace.
Background
The submerged arc furnace is also called electric arc furnace or resistance furnace. It is mainly used for reducing and smelting raw materials such as ore, carbonaceous reducing agent and solvent. The method is mainly used for producing ferrosilicon, ferromanganese, ferrochromium, ferrotungsten, silicomanganese and other ferroalloys, and is an important industrial raw material in the metallurgical industry and a chemical raw material such as calcium carbide and the like. The transformer of the submerged arc furnace has continuous and stable load, low impedance voltage, more voltage regulation stages, smaller stage difference and strong overload capacity. Can be divided into two types of loaded voltage regulation and non-excited voltage regulation. Generally, the first several stages of constant capacity output and the last several stages of constant current output;
the submerged arc furnace is also called electric arc furnace or resistance furnace. It is mainly used for reducing and smelting raw materials such as ore, carbonaceous reducing agent and solvent. The method is mainly used for producing ferrosilicon, ferromanganese, ferrochromium, ferrotungsten, silicomanganese and other ferroalloys, and is an important industrial raw material in the metallurgical industry and a chemical raw material such as calcium carbide and the like.
It features use of carbon or magnesium refractory as furnace lining and self-culturing electrode. The electrode is inserted into the furnace charge to carry out submerged arc operation, the energy and current of the electric arc are utilized to pass through the furnace charge, the energy is generated due to the resistance of the furnace charge to smelt metal, the charging is carried out sequentially, the iron slag is discharged intermittently, and the continuous operation is carried out. The transformer of the submerged arc furnace has continuous and stable load, low impedance voltage, more voltage regulation stages, smaller stage difference and strong overload capacity. Can be divided into two types of loaded voltage regulation and non-excited voltage regulation. Generally, the first several stages of constant capacity output and the last several stages of constant current output;
when the traditional submerged arc furnace is used for producing high-silicon low-aluminum-silicon-calcium alloy, the furnace life period is short, the furnace building times and the raw material consumption for furnace building are more, and the production efficiency is low.
Disclosure of Invention
The invention mainly aims to provide a novel process for producing a high-silicon low-aluminum-silicon-calcium alloy by a submerged arc furnace, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a novel submerged arc furnace production process of high-silicon low-aluminum-silicon-calcium alloy comprises the following steps of: 1500-1600kg, limestone: 900-950kg, semi coke: 650-680kg, bituminous coal: 600-650kg, silicon slag: 200-300 kg.
Preferably, the moisture content of the carbon-based material in the bituminous coal is 12-18%.
A novel submerged arc furnace process for producing high-silicon low-aluminum-silicon-calcium alloy comprises the following steps:
s1: weighing the silica, limestone, semi-coke, bituminous coal and silica slag according to a certain proportion;
s2: mixing the materials in sequence, and adding the materials into a submerged arc furnace in batches according to the proportion;
s3: heating by a submerged arc furnace with high current, adding the mixture while melting the mixture added into the submerged arc furnace, heating to 1350-1650 ℃, and refining for 12-20min after all the materials are melted to obtain liquid high-silicon low-aluminum-silicon-calcium alloy;
s4: and discharging the high-silicon low-aluminum-silicon-calcium alloy from the furnace, pouring the high-silicon low-aluminum-silicon-calcium alloy into a ship-shaped ladle car, pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold from the ladle car for casting, cooling and crushing the high-silicon low-aluminum-silicon-calcium alloy into blocks to obtain the finished high-silicon low-aluminum-silicon-calcium alloy.
Preferably, the smelting time of the submerged arc furnace is 1.5-2h, and the smelting power consumption is 9000-9600 KW.h/t.
Preferably, when the high-silicon low-aluminum-silicon-calcium alloy is poured into an ingot mold, the high-silicon low-aluminum-silicon-calcium alloy is cooled at normal temperature, and the cooling time is kept for 6-8 hours.
Preferably, the working current of the submerged arc furnace is 460-520A.
Compared with the prior art, the invention has the following beneficial effects: according to the novel process for producing the high-silicon low-aluminum-silicon-calcium alloy by the submerged arc furnace, the furnace life cycle is improved by 18 months from 10 months, the furnace building raw materials are saved, the furnace building times are reduced, the labor intensity of workers is reduced, the production efficiency is improved, and meanwhile, the product quality prepared by the process is remarkably improved: 58 percent of Si is increased to 60 percent, 28 percent of Ca is increased to 29 percent, Al is less than or equal to 1.25 percent, and C is less than or equal to 0.4 percent; and the yield is improved: the daily yield is as follows: the 36 tons is improved to 40-45 tons, and the practicability is realized.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
A novel submerged arc furnace production process of high-silicon low-aluminum-silicon-calcium alloy comprises the following steps of: 1500-1600kg, limestone: 900-950kg, semi coke: 650-680kg, bituminous coal: 600-650kg, silicon slag: 200-300 kg.
The moisture content of the carbon-based material in bituminous coal is 12-18%.
A novel submerged arc furnace process for producing high-silicon low-aluminum-silicon-calcium alloy comprises the following steps:
s1: weighing the silica, limestone, semi-coke, bituminous coal and silica slag according to a certain proportion;
s2: mixing the materials in sequence, and adding the materials into a submerged arc furnace in batches according to the proportion;
s3: heating by a submerged arc furnace with high current, adding the mixture while melting the mixture added into the submerged arc furnace, heating to 1350-1650 ℃, and refining for 12-20min after all the materials are melted to obtain liquid high-silicon low-aluminum-silicon-calcium alloy;
s4: and discharging the high-silicon low-aluminum-silicon-calcium alloy from the furnace, pouring the high-silicon low-aluminum-silicon-calcium alloy into a ship-shaped ladle car, pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold from the ladle car for casting, cooling and crushing the high-silicon low-aluminum-silicon-calcium alloy into blocks to obtain the finished high-silicon low-aluminum-silicon-calcium alloy.
The smelting time of the submerged arc furnace is 1.5-2h, and the smelting power consumption is 9000-9600 KW.h/t; when pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold, cooling at normal temperature, wherein the cooling time is kept for 6-8 h; the working current of the submerged arc furnace is 460-520A.
Example 1
The high-silicon low-aluminum-silicon-calcium alloy comprises the following components in parts by weight: 1500-1600kg, limestone: 900-950kg, semi coke: 650-680kg, bituminous coal: 600-650kg, silicon slag: 200-300 kg.
Example 2
When the high-silicon low-aluminum-silicon-calcium alloy produced by the submerged arc furnace is processed, the silica, the limestone, the semi-coke, the bituminous coal and the silicon slag are weighed according to a certain proportion; mixing the materials in sequence, and adding the materials into a submerged arc furnace in batches according to the proportion; heating by a submerged arc furnace with high current, adding the mixture while melting the mixture added into the submerged arc furnace, heating to 1350-1650 ℃, and refining for 12-20min after all the materials are melted to obtain liquid high-silicon low-aluminum-silicon-calcium alloy; and discharging the high-silicon low-aluminum-silicon-calcium alloy from the furnace, pouring the high-silicon low-aluminum-silicon-calcium alloy into a ship-shaped ladle car, pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold from the ladle car for casting, cooling and crushing the high-silicon low-aluminum-silicon-calcium alloy into blocks to obtain the finished high-silicon low-aluminum-silicon-calcium alloy.
The smelting time of the submerged arc furnace is 1.5-2h, and the smelting power consumption is 9000-9600 KW.h/t; when pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold, cooling at normal temperature, wherein the cooling time is kept for 6-8 h; the working current of the submerged arc furnace is 460-520A.
The detection shows that the high-silicon low-aluminum-silicon-calcium alloy produced by the method contains Ca 27-32%, Si 56-60%, slag components of SiC 14%, CaC 27-9%, SiO 214-17%, CaO 40-50%, Al2O 32-3%, FeO 1% and MgO 1%. 0.5-0.7 t of 1t of silicon-calcium slag, about 670kg of limestone, about 1500kg of silica, about 650kg of semi-coke, 650kg of bituminous coal, about 400kg of electrode paste, about 9600kWh of electric energy consumption, 55-75% of calcium recovery rate and 75-90% of silicon recovery rate when 1t of silicon-calcium alloy (28% of Ca is taken as a reference) is produced.
Comparative example
The slag composition of the silicon-calcium alloy produced by the mixing method is approximately: 22 to 28 percent of SiC, 210 to 20 percent of CaC, 212 to 20 percent of SiO, 30 to 45 percent of CaO, 32 to 3 percent of Al2O, about 0.5 percent of FeO and about 0.3 percent of MgO. 1.0-1.5 t of slag is produced per ton of the silicon-calcium alloy. The Ca content of the silicon-calcium alloy is more than or equal to 24-28 percent, and the Si content is about 60 percent.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A novel process for producing a high-silicon low-aluminum-silicon-calcium alloy by a submerged arc furnace is characterized in that the high-silicon low-aluminum-silicon-calcium alloy comprises the following components by weight: 1500-1600kg, limestone: 900-950kg, semi coke: 650-680kg, bituminous coal: 600-650kg, silicon slag: 200-300 kg.
2. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 1, which is characterized in that: the water content of the carbon-based material in the bituminous coal is 12-18%.
3. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 1, which is characterized in that: the process for producing the high-silicon low-aluminum-silicon-calcium alloy by the submerged arc furnace comprises the following steps:
s1: weighing the silica, limestone, semi-coke, bituminous coal and silica slag according to a certain proportion;
s2: mixing the materials in sequence, and adding the materials into a submerged arc furnace in batches according to the proportion;
s3: heating by a submerged arc furnace with high current, adding the mixture while melting the mixture added into the submerged arc furnace, heating to 1350-1650 ℃, and refining for 12-20min after all the materials are melted to obtain liquid high-silicon low-aluminum-silicon-calcium alloy;
s4: and discharging the high-silicon low-aluminum-silicon-calcium alloy from the furnace, pouring the high-silicon low-aluminum-silicon-calcium alloy into a ship-shaped ladle car, pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold from the ladle car for casting, cooling and crushing the high-silicon low-aluminum-silicon-calcium alloy into blocks to obtain the finished high-silicon low-aluminum-silicon-calcium alloy.
4. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 3, which is characterized in that: the smelting time of the submerged arc furnace is 1.5-2h, and the smelting power consumption is 9000-9600 KW.h/t.
5. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 1, which is characterized in that: when pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold, cooling at normal temperature for 6-8 h.
6. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 1, which is characterized in that: the working current of the submerged arc furnace is 460-520A.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118379A (en) * | 1994-09-05 | 1996-03-13 | 甘肃省城市集体经济工商公司 | Melting process and special furnace for high grade silica-calcium alloy |
| CN1281905A (en) * | 1999-07-23 | 2001-01-31 | 李金山 | Production method of high-grade silicon-calcium alloy and its ore-smelting electric furnace |
| CN101418387A (en) * | 2008-10-25 | 2009-04-29 | 石嘴山市科通冶金工贸有限公司 | Calcium-silicon alloy mixed smelting method |
| CN101709379A (en) * | 2009-12-01 | 2010-05-19 | 陕西盛华冶化有限公司 | Proportioning method of large Fe-Ca-Si alloy electric stove |
| CN102121069A (en) * | 2010-12-28 | 2011-07-13 | 陕西盛华冶化有限公司 | Raw material of high purity silicon-calcium alloy and production equipment and production process thereof |
| CN105986121A (en) * | 2015-03-02 | 2016-10-05 | 石嘴山市宝马兴庆特种合金有限公司 | Method for producing multi-component alloy by using hill-skill soil and dust removing micro-powder |
| CN109338128A (en) * | 2018-10-31 | 2019-02-15 | 宁夏科通新材料科技有限公司 | A kind of calcium-silicon production technology |
-
2020
- 2020-06-17 CN CN202010556005.8A patent/CN111676370A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118379A (en) * | 1994-09-05 | 1996-03-13 | 甘肃省城市集体经济工商公司 | Melting process and special furnace for high grade silica-calcium alloy |
| CN1281905A (en) * | 1999-07-23 | 2001-01-31 | 李金山 | Production method of high-grade silicon-calcium alloy and its ore-smelting electric furnace |
| CN101418387A (en) * | 2008-10-25 | 2009-04-29 | 石嘴山市科通冶金工贸有限公司 | Calcium-silicon alloy mixed smelting method |
| CN101709379A (en) * | 2009-12-01 | 2010-05-19 | 陕西盛华冶化有限公司 | Proportioning method of large Fe-Ca-Si alloy electric stove |
| CN102121069A (en) * | 2010-12-28 | 2011-07-13 | 陕西盛华冶化有限公司 | Raw material of high purity silicon-calcium alloy and production equipment and production process thereof |
| CN105986121A (en) * | 2015-03-02 | 2016-10-05 | 石嘴山市宝马兴庆特种合金有限公司 | Method for producing multi-component alloy by using hill-skill soil and dust removing micro-powder |
| CN109338128A (en) * | 2018-10-31 | 2019-02-15 | 宁夏科通新材料科技有限公司 | A kind of calcium-silicon production technology |
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Application publication date: 20200918 |