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High-activity reduction agent for smelting iron alloy by electric oven

An electric furnace smelting and ferroalloy technology, which is applied to electric furnaces, furnaces, furnace types, etc., can solve the problems of loose structure, differences in mechanical strength and particle size, and unsatisfactory effects, so as to increase production and reduce the speed of reduction reaction. effect of cost

Inactive Publication Date: 2005-04-20
陈航
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the differences in the physical properties, chemical activity, mechanical strength and particle size of various reducing agents, the use of conventional matching has the problem of loose structure and unsatisfactory effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1. Prepare the reducing agent as follows.

[0012] a, raw material preparation: get fixed carbon content 82%, ash content 13%, volatile matter 8% coke powder (or broken coke) 40kg, fixed carbon content 72%, ash content 10%, volatile matter 18% bituminous coal ( or crushed bituminous coal) 30kg, 30kg of anthracite powder (or crushed anthracite) with a fixed carbon content of 82%, ash content of 16%, and a volatile content of 6%. The three things are mixed to obtain a fixed carbon content of 79%, ash content of 13%, Volatile matter is 100kg mixture of 13.4%, obtains A product.

[0013] b. Preparation: Process product A into a powder with a particle size of less than 1 mm, then add 5 kg of calcium oxide and 3 kg of sodium chloride and mix well, and press it into a briquette with a diameter of 20 mm to 30 mm with a briquette machine to obtain a highly active briquette that can be used directly reducing agent. Wherein, the catalyst can also use calcium chloride, c...

Embodiment 2

[0014] Example 2. Prepare the reducing agent as follows.

[0015] a, raw material preparation: get fixed carbon content 82%, ash content 13%, volatile matter 5% coke powder (or broken coke) 50kg, fixed carbon content 75%, ash content 10%, volatile matter 15% bituminous coal ( or crushed bituminous coal) 50kg, the two things are mixed evenly to obtain a 100kg mixture of 78.5% fixed carbon, 11.5% ash, and 10% volatile matter to obtain product A.

[0016] b. Preparation: Process product A into a powder with a particle size of less than 1mm, then add 7kg of calcium oxide and 2kg of sodium chloride to mix, and press it into a briquette with a diameter of 20mm to 30mm with a briquette machine to obtain a highly active briquette that can be used directly. reducing agent.

Embodiment 3

[0017] Example 3. Prepare the reducing agent as follows.

[0018] a, raw material preparation: get 50kg of bituminous coal (or crushed bituminous coal) with fixed carbon content 76%, ash content 10%, volatile matter 14%, anthracite powder (or crushed coal powder) with fixed carbon content 80%, ash content 14%, volatile matter 6%. Anthracite) 50kg, the two are mixed evenly to obtain a 100kg mixture of 78% fixed carbon, 12% ash, and 10% volatile matter to obtain product A.

[0019] b. Preparation: Process product A into a powder with a particle size of less than 1mm, then add 8kg of calcium oxide and 2kg of sodium chloride to mix, and press it into a briquette with a diameter of 20mm to 30mm with a briquette machine to obtain a high-activity briquette that can be used directly. reducing agent.

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PUM

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Abstract

The invention discloses a highly active reducing agent for smelting ferroalloys in an electric furnace. It first selects one or more of coke powder, bituminous coal, and anthracite, and prepares a mixture of fixed carbon not less than 78%, ash content not greater than 16%, and hair content not less than 10%; then the mixture is processed into a particle size For powders smaller than 1mm, add 5-8% catalyst and 2-3% binder according to the weight of the powder, mix well, and press into spherical objects with a block diameter of 20-30mm to obtain finished products. This reducing agent not only gathers the advantages of a single carbonaceous reducing agent, but also reduces the cost of obtaining the reducing agent. In practice, the reducing agent of the present invention has the characteristics of high reaction activity, increased oxide reduction amount, accelerated reduction reaction speed, increased output, reduced power consumption and reduced total production cost. The reducing agent of the present invention is especially suitable for smelting ferroalloys of silicon series, manganese series and chromium series in large and medium-sized electric furnaces.

Description

technical field [0001] The invention relates to a method for preparing a reducing agent for smelting, in particular to a method for preparing a reducing agent for smelting ferroalloys in an electric furnace. Background technique [0002] There are many types of carbonaceous reducing agents that can be used for smelting ferroalloys in electric furnaces with different properties. But the overall requirement is that it is best to meet the indicators of high fixed carbon, low ash content, high specific resistance, good reaction performance, certain particle size and mechanical strength, low price, and easy availability. At present, coke is the most widely used carbonaceous reducing agent for ferroalloy smelting in electric furnaces. The main advantages of coke are high fixed carbon, high porosity, and good mechanical strength. However, coke has a high ash content and low specific resistance, which is not conducive to smelting operations, which is its biggest weakness. The seco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/12C22B5/06C22C33/04
Inventor 陈航
Owner 陈航
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