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Coking additive agent and use thereof

A technology for coal additives and uses, applied in the field of coking additives, can solve the problems of adverse effects of coke blast furnace operation, increased cost, poor cohesion, etc., and achieves the effect of ensuring large-scale long-term use, safe mixing and low cost

Inactive Publication Date: 2012-08-22
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] Embodiment 1 The preparation of coke additive of the present invention

[0016] Take SiO with a purity of 99% 2 , using a ball mill to grind into a powder that can pass through a 100-mesh sieve, and wherein 80% by weight can pass through a 200-mesh sieve. Set aside.

Embodiment 2

[0017] Example 2 Preparation of coke using traditional techniques

[0018] Mixed coal ratio: 20% of Pakistan coking coal, 10% of grid coking coal, 10% of Guizhou coal, 5% of Fuyuan coal, 25% of Huaping coal, 10% of suburban coal, 5% of Longchang coal, 5% of Guangrong coal, and 10% of lean coal %, with coal moisture content of 10.3%. Take 400g of mixed coal, put it into a corundum crucible (Φ80mm×110mm), and then use a 3kg weight to compact the mixed coal in the crucible for 5 minutes, remove the counterweight and seal it, and put it into a muffle furnace (400mm×150mm×200mm) Dry distillation, heating rate 18°C / min, heating up to 1100°C, constant temperature for 100min, taking out water to quench the coke, cooling and crushing into particles with a particle size of 5-10mm for thermal reactivity (the thermal reactivity measurement method refers to the national standard GB / T4000-1996, in Put 20g coke sample into the reactor, and when the temperature of the center of the material ...

Embodiment 3

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

[0020] Mixed coal ratio: 20% of Pakistan coking coal, 10% of grid coking coal, 10% of Guizhou coal, 5% of Fuyuan coal, 25% of Huaping coal, 10% of suburban coal, 5% of Longchang coal, 5% of Guangrong coal, and 10% of lean coal %, with coal moisture content of 10.3%. Mixed coal 400g, SiO 2 2g(SiO 2 Granularity -200 mesh accounts for 90%, purity 99%) and mix well, put it into a corundum crucible (Φ80mm×110mm), and then use 3kg weight to compact the coal in the crucible for 5min, remove the counterweight and seal, put Dry distillation in a muffle furnace (400mm×150mm×200mm), the heating rate is 18°C / min, the temperature is raised to 1100°C, the temperature is kept constant for 100min, the water is taken out to quench the coke, and after cooling, it is crushed into a particle size of 5-10mm for thermal reactivity (thermal reactivity) The measurement method refers to the national standard GB...

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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 in particular relates to a coking additive for improving the quality of coke and an application thereof. Background technique [0002] With the further increase of blast furnace smelting intensity, the requirements of blast furnace for raw materials are gradually increased. Especially if the quality of coke can be further improved, it is of great significance to increase the amount of coal injection in the blast furnace, reduce the consumption of coke and reduce the production cost of ironmaking. [0003] Generally, the method to improve the quality of coke is to add cohesive substances, such as pitch, tar, etc., to the blended coal, and use the cohesiveness of the additives during coking to improve the quality of the blended coal to achieve the purpose of improving the quality of coke; In addition, the quality of coke can be improved by changing the coking process, such as tamping coking, ble...

Claims

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Application Information

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Patent Type & Authority Patents(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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