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Whole coal powder wet duriron smelting technology

A technology for pulverized coal and ferrosilicon, which is applied in the field of ferrosilicon smelting technology, can solve the problems of reducing the smelting cost of a single furnace and the comprehensive smelting cost, and achieve the effects of reducing the number of furnaces, smooth slag discharge, and loose material surface.

Inactive Publication Date: 2003-10-01
JINHE MINING & METALLURGY SHUIGANG GROUP
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AI Technical Summary

Problems solved by technology

It adopts low carbon ratio ingredients, wet material into the furnace, and high material surface smelting, which solves the problems of using raw coal as a reducing agent at present, and greatly reduces the cost of single furnace smelting and comprehensive smelting

Method used

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Embodiment

[0012] Embodiment: Ferrosilicon smelting technology by humidification of whole pulverized coal is smelted ferrosilicon according to the following process:

[0013] a. Material selection: choose powdered raw coal with ash content ≤ 10%, volatile content ≤ 22%, silica and iron materials that meet the requirements of the existing smelting process, and limestone or fluorite as raw materials;

[0014] b. Ingredients: After the silica is washed with water, each batch is prepared according to 100kg of silica, 3-5kg of coal powder with a theoretical carbon content of 97-98%, and 3-5kg of theoretically used iron materials;

[0015] c. Mixing: add water to the prepared charge and stir it, so that the coal powder is attached to the surface of the silica, and the mixed charge is obtained;

[0016] d. Into the furnace: put the mixed furnace material into the furnace, and keep the material surface 100-500mm higher than the furnace mouth;

[0017] e. Smelting: The smelting process after cha...

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Abstract

The whole pulverized coal humidification smelting ferrosilicon technology, which selects powdery raw coal with ash content ≤ 12%, volatile content ≤ 22%, silica, iron materials, and limestone or fluorite as raw materials; Furnace material is put into the furnace, and the material surface is kept 100-500mm higher than the furnace mouth for smelting; other smelting requirements are the same as the existing smelting process. The invention adopts ingredients with low carbon ratio, puts wet materials into the furnace, and smelts with high material surface. It solves the existing problems of using raw coal as a reducing agent at present, and greatly reduces the single-furnace smelting cost and the comprehensive smelting cost. The aluminum content of the finished product can reach no more than 0.5%, and can be guaranteed to be less than 1.8%. The utility model has the characteristics of good practical effect and remarkable economic benefit.

Description

technical field [0001] The invention relates to a metal smelting technology, in particular to a ferrosilicon smelting technology. Background technique [0002] The use of raw coal instead of metallurgical coke, gas coal coke, semi-coke, charcoal, etc. as the reducing agent for ferrosilicon smelting has been widely used at home and abroad. The advantage of using raw coal as a reducing agent is that the cost is lower than other reducing agents. However, there are some new problems in the smelting process. For example: the air permeability in the furnace is poor, and the furnace mouth is severely hardened; the raw coal is severely burned, the utilization rate is low, and the smooth operation of the furnace is affected; the Al in the raw coal 2 o 3 The high content makes slag formation more difficult to remove during the smelting process, which can easily cause the bottom of the furnace to rise, shorten the life of the furnace, and increase the overall cost. Contents of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/10C22C33/04
Inventor 陈航
Owner JINHE MINING & METALLURGY SHUIGANG GROUP
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