CN1814843A - Out-of-furnace process for producing high-silicon manganese silicon - Google Patents
Out-of-furnace process for producing high-silicon manganese silicon Download PDFInfo
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- CN1814843A CN1814843A CN 200610031315 CN200610031315A CN1814843A CN 1814843 A CN1814843 A CN 1814843A CN 200610031315 CN200610031315 CN 200610031315 CN 200610031315 A CN200610031315 A CN 200610031315A CN 1814843 A CN1814843 A CN 1814843A
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Abstract
This invention relates to a production method for high SiMnSi by an external furnace method including 1, preparing materials: crusing FeSi powder into the size of 0-10mm, taking Mn slags from a solution with 18-20%Mn and 1.0-1.2 alkali to be put standby under 1480-1510deg.C, 2, inpouring the FeSi and the Mn slags into a waving bag in the proportion of 1:6-9, starting the bag for 9-17 minutes and keeping still for 9-12 minutes then raking up slags to be cast and arranged then to be sent to the storeroom.
Description
Technical Field
The invention relates to a process for producing high-silicon manganese-silicon by an out-of-furnace method, in particular to a production process method for producing high-silicon manganese-silicon alloy by taking ferrosilicon (crystal silicon) and liquid medium manganese slag as raw materials through shaking a ladle.
Background
The high silicon manganese silicon alloy is a traditional ferroalloy product, and has been produced by carbon thermal method in submerged arc furnace, and the process consumes 5000kWh of electricity and produces 1200m of waste gas every time one ton of silicon manganese alloy is produced3(standard state), the waste water is 110 tons, and the high-silicon manganese-silicon alloy which is used for producing low-carbon ferromanganese and has the C less than or equal to 0.7 percent is difficult to produce in a submerged arc furnace.
The shaking ladle production is an energy-saving new process, is recorded in various ferroalloy documents, and belongs to an ferroalloy out-of-furnace production process. Advanced foreign enterprises have been applied to production as a mature process. The method has the advantages of no pollution, energy conservation, capability of improving the recovery rate of elements in ores, more importantly, comprehensive utilization of waste residues, great reduction of the production cost of products, capability of competitive development of various domestic iron alloy factories in more than ten years, and experimental development of the company in 1994. However, in 2003 of this century, other domestic iron alloy factories really form industrial production shaking ladles, and only pre-smelt manganese-silicon alloy by using medium manganese slag to generate low-silicon manganese-silicon alloy, and then put the low-silicon manganese-silicon alloy into a furnace to smelt and produce medium-carbon ferromanganese; so the added value of the final product is low.
The traditional production method of high-silicon manganese silicon is to produce in an electric furnace, and the content of C element in the alloy is controlled by improving the content of Si element in the product. The disadvantages of this method are: high power consumption, high-quality imported manganese ore with low P content, high production cost, difficult control of furnace conditions, large fluctuation of product components and low grade rate. In recent years, domestic steel manufacturers adjust steel structure, increase proportion of high-quality steel, and sharply increase demand for low-carbon ferromanganese. The key point of producing low-carbon ferromanganese is that high-quality high-silicon manganese silicon exists, if a new process for producing high-silicon manganese silicon alloy by shaking a ladle can be developed, the production cost of the high-silicon manganese silicon alloy can be greatly reduced, and high-quality product components can be ensured; not only reducing environmental pollution, but also having social and economic benefits.
Disclosure of Invention
The invention aims to provide a novel process for producing high-silicon manganese-silicon alloy by shaking manganese slag in an out-of-furnace method.
The purpose of the invention is realized by the following ways: a production process of high silicon manganese silicon by an external furnace method comprises the first step of preparing materials, namely crushing ferrosilicon powder into the particle size of 0-10 mm; taking liquid manganese slag, wherein the manganese content of the manganese slag is 18-20%, the alkalinity is 1.0-1.2, and the storage temperature is 1480-1510 ℃ for later use; and secondly, reacting, namely injecting ferrosilicon and liquid medium manganese slag into a shaking ladle in sequence according to the weight percentage of 1: 6-9, starting the shaking ladle for 9-17 minutes, stewing for 9-12 minutes, removing slag, casting, finishing and warehousing.
The ferrosilicon powder FeSi can be 75 percent ferrosilicon FeSi or bulk 65 percent ferrosilicon FeSi or crystalline silicon Si.
When 75% ferrosilicon powder and liquid medium manganese slag are used for reaction, the adding proportion of the ferrosilicon powder and the liquid medium manganese slag is 1: 7.2-7.5 by weight percent, and the time for operating and shaking the ladle is 14-17 minutes; when 65% ferrosilicon powder and liquid medium manganese slag are used for reaction, the adding proportion of the ferrosilicon powder and the liquid medium manganese slag is 1: 6.2-6.4 by weight percent, and the operation and ladle shaking time is 14-17 minutes; when the crystalline silicon and the liquid medium manganese slag are used for reaction, the addition ratio of the crystalline silicon to the liquid medium manganese slag is 1: 8.7-8.9 in percentage by weight, and the operation and ladle shaking time is 10-14 minutes.
When 75% ferrosilicon powder and liquid medium manganese slag are used for reaction, the adding proportion of the ferrosilicon powder and the liquid medium manganese slag is 1: 7.33 by weight percent, and the time of operating and shaking the ladle is 15 minutes; when 65 percent of ferrosilicon powder and liquid medium manganese slag are used for reaction, the adding proportion of the ferrosilicon powder and the liquid medium manganese slag is 1: 6.28 by weight percent, and the time of operating and shaking the ladle is 15 minutes; when the crystalline silicon and the liquid medium manganese slag are used for reaction, the addition ratio of the crystalline silicon to the liquid medium manganese slag is 1: 8.80 in percentage by weight, and the time for operating and shaking the ladle is 12 minutes.
Before the reaction, 20-30 Kg of pack of ferrosilicon powder is in order to every bag for later use, is convenient for artifical transport to add to shake the package.
The manganese slag shaking ladle is used to produce high-silicon manganese silicon outside the furnace, mainly by using Si in ferrosilicon and MnO in manganese slagIn the state of shaking the bagOxidation reduction reaction is carried out to generate Mn and SiO2The chemical reaction formula is as follows: the reaction is violent exothermic reaction, no external heat source is needed, and the heat released by the reaction can ensure that the ferrosilicon is melted and the temperature of the manganese slag in the shaking ladle is maintained; as the impurity elements of carbon and phosphorus in the raw materials are very low and smelting in the furnace is not needed, the carbon and the phosphorus in the high-silicon manganese-silicon alloy are very low and stable. The prior production method of the high-silicon manganese-silicon alloy is carried out in an electric furnace, so that the electricity is consumed, and the impurity elements in the raw materials are high in carbon and phosphorus content, so that the smelted high-silicon manganese-silicon product is low in grade.
Liquid medium manganese slag: mn 18-20%; crushing 75% ferrosilicon or 65% ferrosilicon or crystalline silicon to the granularity of 0-10 mm; firstly, adding liquid medium manganese slag which is a byproduct of a medium manganese electric furnace into a shaking ladle, adding the crushed ferrosilicon powder into the shaking ladle, and starting the shaking ladle; and stopping shaking the ladle after the silicon content meets the requirement, fully calming, slagging off and casting. The invention contains more than or equal to 22 percent of Si, has the characteristic of lower cost than that of the high-silicon manganese silicon produced by any other forms, and particularly can meet the requirement of the high-silicon manganese silicon used for producing low-carbon ferromanganese. The product quality is stable, the grade rate is high, and the operation is simple, convenient, safe and reliable. Alloy components: c is less than or equal to 0.2 percent, P is less than or equal to 0.08 percent, and the final slag comprises the following components: mn is less than or equal to 5%, alkalinity R: about 0.8.
Drawings
The invention is described in further detail below with reference to the accompanying drawings:
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The following examples refer to fig. 1:
example 1, 600 kg of 75% ferrosilicon was crushed to 8mm grain size; 4400 kg of manganese slag in a liquid state is taken, the manganese Mn content of the manganese slag is 18 percent, the alkalinity is 1.0, and the preservation temperature is 1480 ℃ for standby; pouring the raw materials into a shaking ladle in sequence, operating the shaking ladle for 15 minutes, stewing for 10 minutes, removing slag, casting, finishing and warehousing.
Example 2, 700 kg of 65% ferrosilicon is crushed and processed into 6mm of grain size, 4400 kg of liquid medium manganese slag with the manganese Mn content of 19% and the alkalinity of 1.2, and the storage temperature is 1500 ℃ for standby; pouring the raw materials into a shaking ladle in sequence, operating the shaking ladle for 15 minutes, stewing for 10 minutes, removing slag, casting, finishing and warehousing.
Example 3, 500 kg of crystalline silicon is crushed and processed into 9mm of granularity, 4400 kg of liquid medium manganese slag contains 20% of manganese Mn and has alkalinity of 1.2, and the storage temperature is 1510 ℃ for standby; pouring the raw materials into a shaking ladle in sequence, operating the shaking ladle for 12 minutes, stewing for 10 minutes, removing slag, casting, finishing and warehousing.
Claims (5)
1. A process for producing high silicon manganese silicon by an out-of-furnace method is characterized by comprising the following process steps:
firstly, preparing materials, namely crushing ferrosilicon powder into the particle size of 0-10 mm; taking liquid manganese slag, wherein the manganese content of the manganese slag is 18-20%, the alkalinity is 1.0-1.2, and the storage temperature is 1480-1510 ℃ for later use;
and secondly, reacting, namely injecting ferrosilicon and liquid medium manganese slag into a shaking ladle in sequence according to the weight percentage of 1: 6-9, starting the shaking ladle for 9-17 minutes, stewing for 9-12 minutes, removing slag, casting, finishing and warehousing.
2. The out-of-furnace high-silicon manganese-silicon production process as claimed in claim 1, characterized in that: the ferrosilicon powder FeSi can be 75 percent ferrosilicon FeSior bulk 65 percent ferrosilicon FeSi or crystalline silicon Si.
3. The out-of-furnace high-silicon manganese-silicon production process as claimed in claim 1, characterized in that: when 75% ferrosilicon powder and liquid medium manganese slag are used for reaction, the adding proportion of the ferrosilicon powder and the liquid medium manganese slag is 1: 7.2-7.5 by weight percent, and the time for operating and shaking the ladle is 14-17 minutes; when 65% ferrosilicon powder and liquid medium manganese slag are used for reaction, the adding proportion of the ferrosilicon powder and the liquid medium manganese slag is 1: 6.2-6.4 by weight percent, and the operation and ladle shaking time is 14-17 minutes; when the crystalline silicon and the liquid medium manganese slag are used for reaction, the addition ratio of the crystalline silicon to the liquid medium manganese slag is 1: 8.7-8.9 in percentage by weight, and the operation and ladle shaking time is 10-14 minutes.
4. The out-of-furnace high silicon manganese silicon production process of claim 3, characterized in that: when 75% ferrosilicon powder and liquid medium manganese slag are used for reaction, the adding proportion of the ferrosilicon powder and the liquid medium manganese slag is 1: 7.33 by weight percent, and the time of operating and shaking the ladle is 15 minutes; when 65 percent of ferrosilicon powder and liquid medium manganese slag are used for reaction, the adding proportion of the ferrosilicon powder and the liquid medium manganese slag is 1: 6.28 by weight percent, and the time of operating and shaking the ladle is 15 minutes; when the crystalline silicon and the liquid medium manganese slag are used for reaction, the addition ratio of the crystalline silicon to the liquid medium manganese slag is 1: 8.80 in percentage by weight, and the time for operating and shaking the ladleis 12 minutes.
5. The out-of-furnace high-silicon manganese-silicon production process as claimed in claim 1, characterized in that: before reaction, the ferrosilicon powder is bagged for later use by 20-30 Kg per bag.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692479B (en) * | 2009-09-29 | 2011-08-31 | 武汉理工大学 | Method for preparing P-type high manganese-silicon thermoelectric material |
| CN102168158A (en) * | 2011-03-27 | 2011-08-31 | 中信锦州金属股份有限公司 | Shaking ladle premelting process for producing medium and low carbon ferromanganese |
| CN104313422A (en) * | 2014-09-26 | 2015-01-28 | 四川川投峨眉铁合金（集团）有限责任公司 | Online fusion production method of manganese-silicon alloy powder |
| CN105112661A (en) * | 2015-08-10 | 2015-12-02 | 云南文山斗南锰业股份有限公司 | Method for preparing silicomanganese with high silicon |
| CN106435310A (en) * | 2016-10-14 | 2017-02-22 | 贵州镇远鸿丰新材料有限公司 | Technology for using rocking furnace silicon-thermal method for refining manganese silicon aluminum alloy |
| CN114908263A (en) * | 2022-06-11 | 2022-08-16 | 赤峰鑫旭铸造有限公司 | Preparation method of silicon-manganese alloy |
-
2006
- 2006-03-08 CN CN 200610031315 patent/CN1814843A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692479B (en) * | 2009-09-29 | 2011-08-31 | 武汉理工大学 | Method for preparing P-type high manganese-silicon thermoelectric material |
| CN102168158A (en) * | 2011-03-27 | 2011-08-31 | 中信锦州金属股份有限公司 | Shaking ladle premelting process for producing medium and low carbon ferromanganese |
| CN104313422A (en) * | 2014-09-26 | 2015-01-28 | 四川川投峨眉铁合金（集团）有限责任公司 | Online fusion production method of manganese-silicon alloy powder |
| CN104313422B (en) * | 2014-09-26 | 2016-05-11 | 四川川投峨眉铁合金（集团）有限责任公司 | A kind of production method of online melting manganese-silicon powder |
| CN105112661A (en) * | 2015-08-10 | 2015-12-02 | 云南文山斗南锰业股份有限公司 | Method for preparing silicomanganese with high silicon |
| CN106435310A (en) * | 2016-10-14 | 2017-02-22 | 贵州镇远鸿丰新材料有限公司 | Technology for using rocking furnace silicon-thermal method for refining manganese silicon aluminum alloy |
| CN114908263A (en) * | 2022-06-11 | 2022-08-16 | 赤峰鑫旭铸造有限公司 | Preparation method of silicon-manganese alloy |
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