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Method for improving high-temperature metallurgical property of coke

A coke and high temperature technology is applied in the field of improving the high temperature metallurgical properties of coke, which can solve the problems of difficulty in purchasing high-quality coking coal and difficult high temperature metallurgical properties of coke, so as to improve the thermal strength index of coke, improve high temperature alkali resistance, and improve cold strength. The effect of the indicator

Inactive Publication Date: 2012-11-21
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Years of research results show that coke pyrometallurgical performance indicators depend to a large extent on the quality of coking coal, but affected by changes in the coal market, it is becoming more and more difficult to purchase high-quality coking coal, and it can only be improved by improving the coal blending structure. Pyrometallurgical Properties of Coke Increasingly Difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The method for improving coke pyrometallurgical properties provided by the invention is as follows:

[0013] A. Put boric acid in the return ditch of the coke quenching tower, and enter the powder coke sedimentation tank together with the water in the return ditch of the coke quenching tower. After stirring and mixing to form boric acid water with a mass concentration of 0.5%, it is pumped to The spray pipe group above the coke tower;

[0014] B. Send the coke with a temperature of 1000±50°C to the conventional coke quenching tower, and use 1 ton of water per ton of coke to spray boric acid water with a mass concentration of 0.5%% from the spray pipe group above the coke quenching tower. 1260m 3 / h flow, 160 seconds of coke quenching time, once sprayed on the coke to cool the coke to 80°C, let the boron vapor enter the interior of the coke as much as possible under the action of the "vapor cushion" to form C-B complexation object, and then through B 2 o 3 The reacti...

Embodiment 2

[0016] The method for improving coke pyrometallurgical properties provided by the invention is as follows:

[0017] A. Put boric acid in the return ditch of the coke quenching tower, and enter the powder coke sedimentation tank together with the water in the return ditch of the coke quenching tower. After stirring and mixing to form boric acid water with a mass concentration of 1.5%, it is pumped to The spray pipe group above the coke tower;

[0018] B. Send the coke with a temperature of 1000±50°C to the conventional coke quenching tower, and use 2.5 tons of water per ton of coke to spray boric acid water with a mass concentration of 1.5% at 1260 m 3 / h flow, 110 seconds of coke quenching time, once sprayed on the coke to cool the coke to 50°C, let the boron vapor enter the interior of the coke as much as possible under the action of the "vapor cushion" to form C-B complexation object, and then through B 2 o 3 The reaction channel is blocked, and the resulting coke M 40 A...

Embodiment 3

[0020] The method for improving coke pyrometallurgical properties provided by the invention is as follows:

[0021] A. Put boric acid in the return ditch of the coke quenching tower, and enter the powder coke sedimentation tank together with the water in the return ditch of the coke quenching tower. After stirring and mixing to form boric acid water with a mass concentration of 1%, it is pumped to The spray pipe group above the coke tower;

[0022] B. Send the coke with a temperature of 1000±50°C to the conventional coke quenching tower, and use 1.8 tons of water per ton of coke to spray boric acid water with a mass concentration of 1% at 1260 m 3 / h flow, 130 seconds of coke quenching time, once sprayed on the coke to cool the coke to 65°C, let the boron vapor enter the interior of the coke as much as possible under the action of the "vapor cushion" to form C-B complexation object, and then through B 2 o 3 The reaction channel is blocked, and the resulting coke M 40 An av...

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Abstract

The invention provides a method for improving the high-temperature metallurgical property of coke. The method is characterized in that on the condition that 1-2.5 tons of water are consumed by per ton of coke, a boric acid solution with the mass concentration of 0.5-1.5 percent is sprayed on the coke at the temperature of 950-1050 DEG C at a time at the flow of 1,260 m<3> / h to quench the coke for 110-160 seconds, so as to enable the temperature of the coke to be reduced to 50-80 DEC G. Due to the adoption of the method, not only the thermal strength index of the coke is greatly improved, but also the cold strength index of the coke is improved, and at the same time, the high-temperature alkali-resistance of the coke is improved. Moreover, the shortcomings that boric acid is difficult to fuse and the consumption is high are overcome, the optimization of technological parameters is realized, and the high-temperature metallurgical property of coke can be improved to the utmost through the boric acid.

Description

[0001] technical field [0002] The invention relates to a method for improving high-temperature metallurgical properties of coke, which belongs to the technical field of coal chemical industry. Background technique [0003] With the rapid development of the ironmaking industry, the high-temperature metallurgical performance, hot strength, reactivity, CRI and post-reaction strength CSR index, which characterize the performance of coke in the blast furnace, and the cold strength and crushing strength M 40 and abrasion resistance M 10 Indexes have been paid more and more attention by ironworkers, especially coke reactivity and post-reaction strength are important indicators for evaluating the metallurgical properties of coke. Furnace condition plays an important role. Years of research results show that coke pyrometallurgical performance indicators depend to a large extent on the quality of coking coal, but affected by changes in the coal market, it is becoming more and mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B39/04C10B57/06
Inventor 高云祥李轶唐启荣杨雪峰刘宁斌夏海英杨立新杨方
Owner WUKUN STEEL
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