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Furnace charge for one-step process of producing RE ferro-silicon alloy

A rare-earth ferrosilicon alloy and charge technology, which is applied in the field of one-step production of rare-earth ferrosilicon alloy charge, can solve the problems of large economic losses, difficult implementation, and incomplete lowering of the furnace bottom.

Inactive Publication Date: 2005-05-04
四川红佳瑞稀土金属材料有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former method is relatively easier, and the economic loss is smaller, but once the furnace is repaired, the economic loss is more than 100,000 yuan based on an 1800KVA submerged arc furnace. The bottom of the furnace will quickly rise to the repair position, shortening the service life of the furnace. In addition, it will also cause pollution to the environment due to the discharge of washings
Although the latter method is more thorough, it is difficult to implement and the economic loss is huge. The economic loss of a furnace repair is as high as hundreds of thousands of yuan, and there is still great danger.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021]The batching is carried out with the total weight of charge as 100%. The composition of the charge is: silica content not less than 98%, silica with a particle size of 25-70mm is about 48%; rare earth raw material pellets are about 30%; carbon reducing agent is about 20.5%; steel shavings are about 1.5‰ . In the carbon reducing agent, the total weight of the carbon reducing agent is 100%, of which, coke with a particle size of 3-8mm is about 70%; coke powder with a particle size of less than 3mm is about 10%; walnuts with a particle size of not less than 10mm The shell is about 20%. In the rare earth raw material pellets, the weight ratio of the oxide contained in the rare earth concentrate to the reducing agent carbon is 1:20. The batching takes the total weight of raw material pellets as 100%. Among them, the oxide content is about 60%, and the rare earth concentrate with a particle size of 0.152mm or more is about 67.58%; the carbon reducing agent is about 18.24%, ...

Embodiment 2

[0023] The batching is carried out with the total weight of charge as 100%. The composition of the charge is as follows: the silica content is not less than 98%, and the silica with a particle size of 25-70mm is about 49%; the rare earth raw material pellets are about 29.4%; the carbon reducing agent is about 20%; 1.6%. In the charging carbon reducing agent, the total weight of the carbon reducing agent is 100%. Semi-coke with a particle size of 3-8mm accounts for about 72%; coke powder with a particle size of less than 3mm accounts for about 8%; bamboo chips with a particle size of not less than 10mm account for about 20%. In the rare earth raw material pellets used as the furnace charge, the weight ratio of the oxide to the reducing agent carbon in the rare earth concentrate is 1:1.25. The batching takes the total weight of rare earth raw material pellets as 100%. The composition of the raw material pellets is: 65.54% rare earth concentrate powder with an oxide content of...

Embodiment 3

[0025] Carry out batching with the gross weight of charge as 100%. The composition of the charge is as follows: silica content not less than 98%, silica with a particle size of 25-70mm is about 48.6%; rare earth raw material pellets are about 30.4%; carbon reducing agent is about 19.8%; steel shavings are about 1.20% . In the charging carbon reducing agent, the total weight of the carbon reducing agent is 100%. Coke with a particle size of 3-8mm accounts for about 30%; semi-coke with a particle size of 3-8mm accounts for about 30%; coke powder with a particle size of less than 3mm is about 12%; bamboo chips with a particle size of not less than 10mm are about 28%. In the rare earth raw material balls used as the furnace charge, the weight ratio of the oxide to the reducing agent carbon in the rare earth concentrate is 1:1.30. The batching takes the total weight of raw material pellets as 100%. The composition of the raw material pellets is: about 59.52% of the rare earth c...

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Abstract

The present invention is a furnace charge suitable for one-step production of rare earth ferrosilicon alloys. The main technical measures adopted are to keep the carbon ratio in the rare earth raw material pellets used as the furnace charge at a level of 1:1.20-1.30, and in the raw material pellets 2.0-10.0% silicon element by weight of the oxide contained in the rare earth concentrate is added. In the production process of the rare earth ferrosilicon alloy, the furnace charge disclosed by the present invention can effectively overcome the problem of furnace bottom rising in the process of producing rare earth ferrosilicon alloy with the prior art, and avoid the huge economic loss caused by repairing the furnace due to the furnace bottom rising, The production cost is greatly reduced.

Description

1. Technical field [0001] The invention relates to a production method of rare earth ferrosilicon alloy, more specifically, relates to a charge for producing rare earth ferrosilicon alloy by one-step method. 2. Background technology [0002] The traditional method of producing rare earth ferrosilicon alloy is a two-step method, that is, ferrosilicon is produced first, and then ferrosilicon and rare earth ore are used as raw materials, and calcium oxide is used as slag agent to produce rare earth ferrosilicon alloy. The biggest disadvantage of this production method is that it cannot be produced continuously, and the production efficiency of a single furnace is low; the impurity components in the alloy are relatively high, which affects the scope of use; the extraction rate of silicon and rare earth is relatively low, which wastes precious resources. In order to overcome the shortcomings of the two-step method, people have explored in many ways and developed a method for the ...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B4/06C22B5/10C22C1/02
Inventor 穆东林
Owner 四川红佳瑞稀土金属材料有限责任公司