CN101418387A - Calcium-silicon alloy mixed smelting method - Google Patents
Calcium-silicon alloy mixed smelting method Download PDFInfo
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- CN101418387A CN101418387A CNA200810174712XA CN200810174712A CN101418387A CN 101418387 A CN101418387 A CN 101418387A CN A200810174712X A CNA200810174712X A CN A200810174712XA CN 200810174712 A CN200810174712 A CN 200810174712A CN 101418387 A CN101418387 A CN 101418387A
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Abstract
The invention relates to a silicon-calcium alloy mixing smelting method. The smelting method comprises the following steps: using a calcium-based material, a silicon dioxide material and a carbon-based material as raw materials; adopting a smelting technology of high-temperature reduction; adopting a smelting technology of mixing, controlling furnace temperature between 1,800 and 2,200 DEG C; continuously feeding the materials in batch subjected to continuous reaction in a furnace; and discharging the materials intermittently. The method is characterized in that the reduction is carried out in an ore heating furnace. The smelting method has the following advantages: firstly, the smelting method has remarkable energy saving and consumption reducing effects, namely, a layering method consumes 14,000kWh of electricity per ton of products, while the smelting method consumes 7,800 to 9,000kWh of electricity; and the layering method consumes 1,000 to 1,400 kilograms of carbon per ton of products, while the smelting method consumes 900 to 1,100 kilograms of carbon; and secondly, the smelting method improves quality of products, namely, silicon content of the products produced by the layering method is less than or equal to 54 percent, while the silicon content of the products produced by the smelting method is more than or equal to 58 percent; impurity aluminum of the products produced by the layering method is less than or equal to 1.8 percent, while the impurity aluminum of the products produced by the smelting method is less than or equal to 1.0 percent; and impurity carbon of the products produced by the smelting method is more than or equal to 1.3 percent, while the impurity carbon of the products produced by the smelting method is less than or equal to 0.7.
Description
Technical field:
The invention belongs to metallurgical technology field, relate to a kind of smelting process of silicocalcium, particularly a kind of calcium-silicon alloy mixed smelting method.
Background technology:
At present, the domestic smelting technology that generally adopts of silicocalcium is top and bottom process production, and the type of furnace is little, disposable feeding intake.The interrupter method production technique, the unit consumption height, energy utilization rate is low, yields poorly the quality instability.Its technical process as shown in Figure 1.
The smelting of domestic ferrosilicon, calcium carbide is generally carried out in the hot stove in ore deposit.Adopt hybrid system (or mixing settling process) production technique, this technology can realize continuous production, and output is higher, and quality product is more stable, and energy consumption is relatively low.But working of a furnace control is difficult, and this technology is not applied to the smelting of silicocalcium as yet.
Summary of the invention:
The objective of the invention is to overcome existing domestic top and bottom process silico-calcium smelting technology defective, a kind of constant product quality is provided, output height, production efficiency height, energy-saving and cost-reducing calcium-silicon alloy mixed smelting method.Purpose of the present invention realizes according to following proposal:
Calcium-silicon alloy mixed smelting method, with calcium sill, earth silicon material and carbon based material is raw material, adopt the high temperature reduction smelting technology, reduction reaction is carried out in the hot stove in ore deposit, adopt the hybrid system smelting technology, Control for Kiln Temperature is at 1800-2200 ℃, in batches continuous charging, successive reaction in the stove, intermittent take-off.
Described calcium sill is calcium oxide or lime carbonate;
Described carbon based material is a caking coal;
Described carbon based material is the compound of caking coal, coke and blue charcoal;
The Composition Control of described silico-calcium product is at silicon weight ratio 〉=58%, calcium weight ratio 〉=28%, and impurity aluminum weight ratio＜1.0%, and be converted into the charging capacity that product composition calculates calcium sill and earth silicon material with raw material 80%-95%;
The consumption of described carbon based material product 900-1100 per ton kilogram;
What came out of the stove described intermittence is spaced apart 1.5-2.5 hour.
The present invention and the contrast of traditional batch method technology have following positively effect:
1, energy conservation and consumption reduction effects is remarkable:
Top and bottom process ton product power consumption: 14000kwh, the present invention: 7800-9000kwh;
Top and bottom process ton product charcoal consumes: 1000-1400kg, the present invention: 900-1100kg
2, quality product improves:
Top and bottom process product silicone content≤54%, the present invention: 〉=58%
Top and bottom process product impurity aluminum≤1.8%, the present invention :≤1.0%
Top and bottom process product impurity charcoal≤1.3%, the present invention :≤0.7%
Six, embodiment:
Embodiment 1: with the hot stove in 6300KVA ore deposit is reduction apparatus, at first is converted into the charging capacity that product composition calculates calcium sill lime carbonate and earth silicon material silica according to raw material 85%; Carbon based material selection caking index is the caking coal more than 70, the amount of allocating into is final product 1000kg per ton, by the accurate mixing raw material of proportioning, drops in the stove, Control for Kiln Temperature is at 1800-2200 ℃, reaction times was controlled at 2-3 hour, generated high-temperature liquid state product, the postprecipitation of coming out of the stove, casting at furnace bottom, chemically examine through finishing after the cooling, the warehouse-in processing and packing, whole process of production is continuous charging in batches, comes out of the stove once every 1.5-2.5 hour.
Embodiment 2: with the hot stove in 6300KVA ore deposit is reduction apparatus, at first is converted into the charging capacity that product composition calculates calcium sill lime carbonate and earth silicon material silica according to raw material 90%; Carbon based material is selected to mix the charcoal material, comprises that caking index is the caking coal more than 70, blue charcoal and coke, allocates total amount 930kg into wherein, caking coal 500kg, blue charcoal 190kg, coke 240kg; By the accurate mixing raw material of proportioning, drop in the stove, Control for Kiln Temperature is at 1800-2200 ℃, reaction times was controlled at 2-3 hour, generated high-temperature liquid state product, the postprecipitation of coming out of the stove, casting at furnace bottom, chemically examine through finishing after the cooling, the warehouse-in processing and packing, whole process of production is continuous charging in batches, comes out of the stove once every 1.5-2.5 hour.
Claims (8)
1, calcium-silicon alloy mixed smelting method, with calcium sill, earth silicon material and carbon based material is raw material, adopt the high temperature reduction smelting technology, it is characterized in that reduction reaction is to carry out in the hot stove in ore deposit, adopt the hybrid system smelting technology, furnace temperature will be controlled at 1800-2200 ℃, divides continuous charging several times, Continuous Heat reduction reaction in the stove is intermittently come out of the stove.
2, calcium-silicon alloy mixed smelting method as claimed in claim 1 is characterized in that described calcium sill is calcium oxide or lime carbonate.
3, calcium-silicon alloy mixed smelting method as claimed in claim 1 is characterized in that described earth silicon material is a silica.
4, calcium-silicon alloy mixed smelting method as claimed in claim 1 is characterized in that described carbon based material is a caking coal.
5, calcium-silicon alloy mixed smelting method as claimed in claim 1 is characterized in that described carbon based material is the compound of caking coal, coke and blue charcoal.
6, calcium-silicon alloy mixed smelting method as claimed in claim 1, the Composition Control that it is characterized in that described silico-calcium product is at silicon weight 〉=58%, calcium weight 〉=28%, impurity aluminum weight＜1.0%, and be converted into the charging capacity that product composition calculates calcium sill and earth silicon material with raw material 80%-95%.
7, calcium-silicon alloy mixed smelting method as claimed in claim 1 is characterized in that the consumption product 900-1100 per ton kilogram of described carbon based material.
8, calcium-silicon alloy mixed smelting method as claimed in claim 1 is characterized in that be 1.5-2.5 hour the pitch time of coming out of the stove described intermittence.
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| CN200810174712XA CN101418387B (en) | 2008-10-25 | 2008-10-25 | Calcium-silicon alloy mixed smelting method |
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| CN200810174712XA CN101418387B (en) | 2008-10-25 | 2008-10-25 | Calcium-silicon alloy mixed smelting method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984102A (en) * | 2010-08-24 | 2011-03-09 | 安阳市鑫屹合金有限责任公司 | Smelting method of calcium-silicon alloy |
| CN105112664A (en) * | 2015-09-22 | 2015-12-02 | 刘来宝 | Method for producing silicon-calcium alloy from cut waste in photovoltaic industry |
| CN106381407A (en) * | 2016-09-22 | 2017-02-08 | 安徽工业大学 | Method for preparing carbonaceous reducing agent and lime composite furnace burden for one-step method calcium silicon alloy smelting |
| CN111676370A (en) * | 2020-06-17 | 2020-09-18 | 宁夏科通新材料科技有限公司 | Process for producing high-silicon low-aluminum-silicon-calcium alloy by novel submerged arc furnace |
-
2008
- 2008-10-25 CN CN200810174712XA patent/CN101418387B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984102A (en) * | 2010-08-24 | 2011-03-09 | 安阳市鑫屹合金有限责任公司 | Smelting method of calcium-silicon alloy |
| CN105112664A (en) * | 2015-09-22 | 2015-12-02 | 刘来宝 | Method for producing silicon-calcium alloy from cut waste in photovoltaic industry |
| CN106381407A (en) * | 2016-09-22 | 2017-02-08 | 安徽工业大学 | Method for preparing carbonaceous reducing agent and lime composite furnace burden for one-step method calcium silicon alloy smelting |
| CN106381407B (en) * | 2016-09-22 | 2018-03-09 | 安徽工业大学 | A kind of carbonaceous reducing agent smelted for one-step method calcium-silicon and lime Composite burden preparation method |
| CN111676370A (en) * | 2020-06-17 | 2020-09-18 | 宁夏科通新材料科技有限公司 | Process for producing high-silicon low-aluminum-silicon-calcium alloy by novel submerged arc furnace |
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| CN101418387B (en) | 2010-12-01 |
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Address after: 753200 Hong Nu zi Town, Hui Nong District, Shizuishan, the Ningxia Hui Autonomous Region Patentee after: NINGXIA KETONG NEW MATERIAL TECHNOLOGY Co.,Ltd. Address before: 753200 Hong Nu zi Town, Hui Nong District, Shizuishan, the Ningxia Hui Autonomous Region Patentee before: SHIZUISHAN KETONG METALLURGY INDUSTRY AND TRADE Co.,Ltd. |
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Denomination of invention: Silicon calcium alloy mixed smelting method Effective date of registration: 20230626 Granted publication date: 20101201 Pledgee: Shizuishan Bank Co.,Ltd. Huinong Branch Pledgor: NINGXIA KETONG NEW MATERIAL TECHNOLOGY Co.,Ltd. Registration number: Y2023980045919 |
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