Method of using common rock ballast as slag-modifier agent for silicomanganese alloy smelting

A technology of silicomanganese alloy and slagging agent, which is applied in the field of metallurgy, can solve the problems of increased energy consumption, prolonged time, and high price of slag adjusting agent, and achieves the effects of high moisture resistance, high construction cost, and cost reduction

Inactive Publication Date: 2013-04-03
GUANGXI XIN MANGANESE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, most silicomanganese alloy manufacturers use dolomite, limestone or lime as the slagging agent. The price of these slagging agents is relatively high, the smelting cost of silicomanganese alloy remains high, and the economic benefits of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Silicon-manganese alloy smelting After the molten iron is released, ordinary rock slag with a particle size of 10-50mm and a calcium carbonate content of 50wt% is added to the submerged arc furnace. The ordinary rock slag is calcined for 60 minutes under the waste heat of the submerged arc furnace to decompose the calcium carbonate in it to form calcium oxide. , add manganese ore, coke, and silica that meet the requirements of silicomanganese alloy smelting, mix evenly, and smelt with conventional smelting techniques to obtain silicomanganese alloy; 2 ) is 0.6~0.8.

[0020] Note: Each time before adding ordinary gravel, the composition of the gravel will be tested to obtain the content of calcium carbonate and silicon dioxide.

[0021] Before adding manganese ore, coke, and silica, the content of each component will also be detected to meet the requirements of the compound smelting ratio of the added manganese ore, coke, and silica. At the same time, the content of calc...

Embodiment 2

[0023] After the silicon-manganese alloy is smelted and released from the furnace in Example 1, ordinary stone slag with a particle size of 10 to 50 mm and a calcium carbonate content of 90wt% is added to the submerged arc furnace. Calcium is decomposed to generate calcium oxide, and manganese ore, coke, and silica that meet the requirements of silicomanganese alloy smelting are added, mixed evenly, and smelted by conventional smelting processes to obtain silicon-manganese alloy; the amount added is to make the slag alkalinity n(CaO+MgO) / n (SiO 2 ) is 0.6~0.8.

[0024] Note: Each time before adding ordinary gravel, the composition of the gravel will be tested to obtain the content of calcium carbonate and silicon dioxide. , silica compound smelting ratio requirements, and also detect the content of calcium oxide, silicon dioxide and magnesium oxide in manganese ore, coke and silica, and then calculate how much ordinary rock slag should be added to make the alkalinity n(CaO+Mg...

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PUM

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Abstract

The invention provides a method of using common rock ballast for smelting silicomanganese alloy. The method is characterized in that the afterheat of a submerged arc furnace is used for calcining common rock ballast containing calcium carbonate after silicomanganese alloy smelting molten iron is discharged, and an obtained calcined object is used as a slag-modifier agent for next silicomanganese alloy melting. Therefore, the common rock ballast replaces dolomite or lime to serve as the slag-modifier agent, the afterheat is fully used, the raw material source of the slag-modifier agent is enlarged, and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for using ordinary rock slag as a slag adjusting agent in smelting silicon-manganese alloys, belonging to the field of metallurgy. Background technique [0002] Silicon-manganese alloy is an alloy composed of manganese, silicon, iron, a small amount of carbon and other elements. It is an alloy with a wide range of uses and a large output. It is mainly used as an intermediate material for deoxidizers and alloying agents in steel production, and is also the main raw material for medium and low carbon ferromanganese production. The raw materials for the production of silicomanganese alloys include manganese ore, manganese-rich slag, silica, coke, etc. The principle of silicon-manganese alloy smelting is as follows: [0003] MnO 2 +2C=Mn + 2 CO , SiO 2 + 2C=Si+2 CO, MnO+ SiO 2 =MnSiO 3 , Mn + Si = MnSi [0004] In the smelting process of silicon-manganese alloy, in order to improve the reduction condition of si...

Claims

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Application Information

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IPC IPC(8): C22C28/00C22C22/00C22C1/00
Inventor 李祖敏
Owner GUANGXI XIN MANGANESE GROUP
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