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Coking additive agent and use thereof

A technology of additives and coal additives, applied in coke ovens, petroleum industry, etc., can solve the problems of adverse effects on the operation of coke blast furnaces, increased costs, poor cohesiveness, etc., to ensure long-term use in large areas, safe mixing, and low cost Effect

Inactive Publication Date: 2009-01-07
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN1392223 "A Coke Modification Method" discloses a coke spraying agent, which can improve the quality of coke to a certain extent, but these methods have the disadvantages of large investment and long period of implementation.
Moreover, the coke produced by some methods even has an adverse effect on the operation of the blast furnace
[0004] At present, my country's coking coal resources are gradually being exhausted, and the coking plants of various iron and steel enterprises are in a state of shortage of coking coal resources. Most of the coking coal comes from the Bureau of Mines. Caking coal, such as strong caking coal in Yunnan and Guizhou, leading to increased costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 Preparation of coke additive of the present invention

[0016] Take 99% purity SiO 2 , Use a ball mill to grind into powder that can pass a 100-mesh sieve, and 80% of which can pass a 200-mesh sieve by weight. Place for use.

Embodiment 2

[0017] Example 2: Preparation of coke using traditional technology

[0018] Blending coal ratio: Pakistan coking coal 20%, grid coking coal 10%, Guizhou coal 10%, Fuyuan coal 5%, Huaping coal 25%, suburban coal 10%, Longchang coal 5%, Guangrong coal 5%, lean coal 10% %, with coal moisture 10.3%. Take 400g of matched coal and put it into a corundum crucible (Φ80mm×110mm), then compact the crucible with a 3kg weight for 5min, remove the weight and seal it, put it into the muffle furnace (400mm×150mm×200mm) Dry distillation, heating rate 18℃ / min, heating to 1100℃, constant temperature for 100min, take out water to quench the coke, after cooling, it is broken into a particle size of 5-10mm for thermal reactivity (The thermal reactivity determination method refers to the national standard GB / T4000-1996, in Fill the reactor with 20g coke sample, when the temperature of the center of the material layer reaches 400℃, pass the flow rate N of 0.8L / min 2 Protect coke, when the material layer...

Embodiment 3

[0019] Example 3 Preparation of coke using the coke additive of the present invention

[0020] Blending coal ratio: Pakistan coking coal 20%, grid coking coal 10%, Guizhou coal 10%, Fuyuan coal 5%, Huaping coal 25%, suburban coal 10%, Longchang coal 5%, Guangrong coal 5%, lean coal 10% %, with coal moisture 10.3%. Blended coal 400g, SiO 2 2g(SiO 2 The particle size-200 mesh accounts for 90%, the purity is 99%), mix it, put it into a corundum crucible (Φ80mm×110mm), then use a 3kg weight to compact the crucible with coal for 5min, remove the weight, seal it, and put it in Dry distillation in the muffle furnace (400mm×150mm×200mm), the heating rate is 18℃ / min, the temperature is increased to 1100℃, the constant temperature is 100min, and the coke is quenched with water. After cooling, it is crushed into a particle size of 5-10mm for thermal reactivity (thermal reactivity) The determination method refers to the national standard GB / T4000-1996, and 20g coke sample is loaded into the r...

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PUM

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Abstract

The invention relates to a coking additive and the application thereof, belonging to the coal processing field. The technical problem to be solved is to improve the coke quality and in particular to lower the thermal reaction of the coke. The coking additive is SiO2 powder which can pass through a sieve 100. The best purity of the additive is larger than 99 percent. SiO2 is creatively applied to the improvement of the performance of the coke by the invention. The reaction of the obtain coke can be lowered by 2-6 percent points. At the same time, with low cost, the coke additive of the invention brings no secondary pollutions. Residuals in the coke bring no negative effects on the blast furnace smelting. And the coking additive is especially applied to the industrialized production.

Description

Technical field [0001] The invention belongs to the field of coal processing, and specifically relates to a coking additive for improving the quality of coke and its application. Background technique [0002] With the further increase of blast furnace smelting intensity, blast furnace requirements for raw materials are gradually increasing. In particular, if the quality of coke can be further improved, it will be of great significance for the blast furnace to increase the amount of coal injection, reduce coke consumption and reduce ironmaking production costs. [0003] The general method to improve the quality of coke is to add caking substances such as pitch, tar and other caking substances to the coking coal, and use the cohesiveness of the additives during coking to improve the quality of the coke to achieve the purpose of improving the quality of the coke; In addition, the quality of coke can be improved by changing the coking process, such as tamping coking, blending briquet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/12
Inventor 蒋胜文永才黄先佑舒文东
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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