Formed coke preparation method for replacing carbon raw material used for electric furnace steel making with COREX coke powder

An electric furnace steelmaking and coke powder technology, applied in coke ovens, special forms of dry distillation, petroleum industry, etc., can solve problems such as cost waste, and achieve the effects of reducing production costs, reducing consumption and high value

Active Publication Date: 2015-11-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production of COREX, coke purchased from outside is also used, resulting in a large amount of coke powder. The utilization of coke powder mainly includes: partly used for coking; preparation of activated carbon; used as raw fuel in sintering plants, which will cause a huge waste of cost
There are also many mold cokes used in the production (CN11800

Method used

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  • Formed coke preparation method for replacing carbon raw material used for electric furnace steel making with COREX coke powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] COREX coke powder (Ad=17%, VMd=4%) smaller than 5mm is crushed with a pulverizer, the particle size of the crushed coke powder is less than 1mm, put in a drying oven and add 6% binder (bentonite: hydroxyl Methyl cellulose = 1:3), fully mixed and stirred, put it into a molding machine, and cold press it under a pressure of 0.8MPa. Cool naturally, and then sieve to keep the coke particle size at 20-60mm. The performance test results are as follows: RI is 33.24, and RSI is 40.33.

[0018] Put the refined molded coke into the electric arc furnace, add 5.5% molded coke, 2% lime, 0.7% fluorite, 0.4% fire block, and deoxidizer etc. according to 1 ton (scrap steel + pig iron) etc., the materials were put into the electric arc furnace for molten steel smelting at 1580°C, and finally qualified molten steel was obtained. The composition of the molten steel is shown in Table 1.

Embodiment 2

[0020] COREX coke powder (Ad=16%, VMd=3%) smaller than 5mm is crushed with a pulverizer, the particle size of the crushed coke powder is less than 1mm, put in a drying oven and add 8% binder (bentonite: hydroxyl Methyl cellulose = 1:2), fully mixed and stirred, put it into a molding machine, and cold press it under a pressure of 1.2MPa. Cool naturally, and then sieve to keep the coke particle size at 20-60mm. The performance test results are as follows: RI is 32.15, and RSI is 41.23.

[0021] Put the refined molded coke into the electric arc furnace, add 5.5% molded coke, 2% lime, 0.7% fluorite, 0.4% fire block, and deoxidizer etc. according to 1 ton (scrap steel + pig iron) etc., the materials were put into the electric arc furnace for molten steel smelting at 1580°C, and finally qualified molten steel was obtained. The composition of the molten steel is shown in Table 1.

Embodiment 3

[0023] COREX coke powder (Ad=14%, VMd=2%) smaller than 5mm is crushed with a pulverizer, the particle size of the crushed coke powder is less than 1mm, put in a drying oven and add 12% binder (bentonite: hydroxyl Methyl cellulose=5:9), fully mixed and stirred, put it into a molding machine, and cold press it under a pressure of 1.2MPa. Cool naturally, and then sieve to keep the coke particle size at 20-60mm. The performance test results are as follows: RI is 32.47, and RSI is 41.19.

[0024] Put the refined molded coke into the electric arc furnace, add 5.5% molded coke, 2% lime, 0.7% fluorite, 0.4% fire block, and deoxidizer etc. according to 1 ton (scrap steel + pig iron) etc., the materials were put into the electric arc furnace for molten steel smelting at 1580°C, and finally qualified molten steel was obtained. The composition of the molten steel is shown in Table 1.

[0025] Table 1 molten steel composition

[0026] Element

[0027] According to a method for...

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Abstract

A formed coke preparation method for replacing a carbon raw material used for electric furnace steel making with COREX coke powder includes the specific process steps of firstly, smashing the COREX coke powder into powder; secondly, adding and processing binding agents and conducting material forming; thirdly, charring materials at a high temperature; fourthly, cooling formed coke. According to the formed coke preparation method for replacing the carbon raw material used for electric furnace steel making with the COREX coke powder, the prepared formed coke can replace the carbon material (such as coke) used for electric furnace steel making, and therefore the consumption of electric furnace steel making carbon-graphite electrodes is lowered, the production cost of electric furnace steel making raw materials is greatly reduced, and quailed liquid steel can be produced. By means of the preparation of the formed coke, a new route is provided for utilization of a large amount of coke powder, especially the COREX coke powder, generated in the transporting, loading and unloading processes. Utilization of the coke powder has higher value, and new cost saving possibility is provided for coking enterprises and coke utilizing enterprises on the aspect of coke utilization.

Description

technical field [0001] The invention belongs to the technical field of COREX waste utilization and carbon raw material for electric furnace steelmaking and the preparation of molded coke, and in particular relates to a method for preparing molded coke by using COREX coke powder instead of carbon raw material for electric furnace steelmaking. Background technique [0002] Due to increasingly stringent environmental protection requirements and a large amount of scrap steel reserves in developed countries, the electric furnace steelmaking process has attracted widespread attention compared with the converter steelmaking process. Because converter steelmaking requires oxygen blowing, a large amount of non-environmental-friendly gases are discharged, while electric furnace smelting mainly uses electric energy, which is more environmentally friendly, but electric furnace steelmaking needs to add a certain amount of coke as a heating agent and carburant, and can pass carbon oxygen ...

Claims

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Application Information

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IPC IPC(8): C10B53/08C10B57/06
Inventor 王玉明毛晓明胡德生钱晖徐万仁
Owner BAOSHAN IRON & STEEL CO LTD
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