Method for coking with high-viscosity high-volatility steam coal

A high-volatile, high-bond technology, used in coke ovens, petroleum industries, etc., can solve the problems of inability to meet the requirements of blast furnace ironmaking, affecting coke quality, and high bonding index, so as to solve the shortage of coal resources and expand coking coal. Remarkable effect of resources and economic benefits

Active Publication Date: 2013-01-09
YUNNAN COAL & ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high volatile content and high caking index of imported Indonesian gas-fertilized coal, when used alone for coking, it will become honeycomb coke with many pores and large size.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A. Prepare materials according to the following proportions:

[0021] Imported Indonesian gas-fertilized coal with Rmax of 0.7% 5 wt%

[0022] Low coalification coal with Rmax of 0.6% 15 wt%

[0023] Medium coalification coal with Rmax of 1.2% 25 wt%

[0024] Medium coalification coal with Rmax of 1.5% 20 wt%

[0025] Medium to high degree of coalification coal with Rmax of 1.5% 35 wt%;

[0026] B, mix each raw coal of step A evenly, get: Rmax is 1.25%, volatile matter is 26.0 wt%, ash is 14wt%, cohesive index is 65, and final shrinkage is 35.0mm, and colloid layer maximum expansion degree 13.5mm mixed coal;

[0027] C. Send the mixed coal in step B to a conventional 5.5-meter tamping coke oven with an aspect ratio of 11:1, the temperature on the machine side is 1335°C, the coke side temperature is 1345°C, and the coke cake center temperature is 1000°C 1. Under the condition that the fire hole pressure is 5pa, the air collecting pipe pressure is 100pa, ...

Embodiment 2

[0029] A. Prepare materials according to the following proportions:

[0030] Imported Indonesian gas-fertilized coal with Rmax of 0.75% 9 wt%

[0031] Low coalification coal with Rmax of 0.9% 10 wt%

[0032] Medium coalification coal with Rmax of 1.1% 20 wt%

[0033] Medium coalification coal with Rmax of 1.3% 46 wt%

[0034] 15 wt% of medium-high coalification coal with Rmax of 1.6%;

[0035] B, mix each raw coal of step A evenly, get: Rmax is 1.15%, volatile matter is 28.0 wt%, ash is 14.5wt%, cohesive index is 70, and final shrinkage is 40mm, and the maximum swelling degree of colloidal layer 14.5mm mixed coal;

[0036] C. Send the mixed coal of step B to a conventional 5.5-meter tamping coke oven. The aspect ratio of the oven is 11:1. The temperature at the machine side of the coke oven is 1320°C, the temperature at the coke side is 1330°C, and the temperature at the center of the coke cake is Under the conditions of 980°C, fire hole pressure of 0pa, gas c...

Embodiment 3

[0038] A. Prepare materials according to the following proportions:

[0039] Imported Indonesian gas-fertilized coal with Rmax of 0.8% 13 wt%

[0040] Low coalification coal with Rmax of 0.9% 10 wt%

[0041] Medium coalification coal with Rmax of 0.9% 15 wt%

[0042] Medium coalification coal with Rmax of 1.2% 42 wt%

[0043] Medium to high degree of coalification coal with Rmax of 1.7% 20 wt%;

[0044] B, mix each raw coal of step A evenly, get: Rmax is 1.05%, volatile matter is 30 wt%, ash is 14.5wt%, cohesive index is 75, and final shrinkage is 45mm, and colloid layer maximum expansion degree 15.5mm mixed coal;

[0045] C. Send the mixed coal in step B to a conventional 5.5-meter tamping coke oven. The aspect ratio of the oven is 11:1. The temperature on the machine side of the coke oven is 1305°C, the temperature on the coke side is 1315°C, and the temperature at the center of the coke cake is Under the conditions of 950°C, the pressure of the fire hole is -5...

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Abstract

The invention provides a method for coking with high-viscosity high-volatility steam coal. The method includes mixing 5-13wt% of coal with Rmax ranging from 0.7% to 0.8%, 10-15wt% of coal with Rmax ranging from 0.6% to 0.9%, 15-25wt% of coal with Rmax ranging from 0.9% to 1.2%, 20-50wt% of coal with Rmax ranging from 1.2% to 1.5% and 15-35wt% of coal with Rmax ranging from 1.5-1.7% uniformly; feeding the above raw materials into a coke tamping furnace, coking for 25-28 hours under conditions that machine-side temperature ranges from 1305 DEG C to 1335 DEG C, coke-side temperature ranges from 1315 DEG C to 1345 DEG C, coke cake center temperature ranges from 950 DEG C to 1050 DEG C, pressure of an observation hole ranges from -5Pa to 5Pa, pressure of a gas collector pipe ranges from 80Pa to 100Pa and suction force of a flue distribution duct ranges from 245Pa to 265Pa, and obtaining qualified cokes meeting requirements of iron making. Resource utilization of coking coal is expanded, the problem of shortage of coal resources is solved, cost is reduced effectively, and economic benefits of enterprises are increased.

Description

[0001] technical field [0002] The invention relates to a coking method, in particular to a coking method in which high-caking and high-volatile coal is blended, and belongs to the technical field of coking, stamping and coking. Background technique [0003] With the continuous rise of domestic raw coal prices, coking enterprises are already in the era of meager profits, or even losses. Expanding coking coal resources to reduce coal blending costs has become a necessary measure for coking enterprises to reverse the unfavorable situation. The introduction of imported Indonesian gas-fertilized coal with low ash content, high caking and low price is one of the measures for coking enterprises to expand coking coal resources and reduce coal blending costs. Due to the high volatile content and high caking index of imported Indonesian gas-fertilized coal, when used alone for coking, it will become honeycomb coke with many pores and large size. Therefore, how to effectively use i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/04
Inventor 龙建新李立薛龙唐宁生陈四利
Owner YUNNAN COAL & ENERGY
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