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Method for preparing high-reactivity gasified coke from calcium carbide waste residues

A calcium carbide waste residue, high reactivity technology, applied in coking ovens, petroleum industry, special forms of dry distillation, etc., can solve the problems of limited application of high-sulfur coking coal, poor economic benefits of enterprises, low operating rate of equipment, etc., and achieve pore structure The effect of enrichment, reduction of coal blending cost, and improvement of reactivity

Pending Publication Date: 2021-09-24
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high sulfur content, in order to ensure that the sulfur content of coke does not exceed the standard, the application of high-sulfur coking coal in coking coal blending is severely limited, and it can only be used as steam coal for combustion, resulting in a huge waste of resources
[0007] In recent years, my country's coking industry is facing difficulties, with serious overcapacity, low operating rate of equipment, and poor economic benefits of enterprises

Method used

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  • Method for preparing high-reactivity gasified coke from calcium carbide waste residues
  • Method for preparing high-reactivity gasified coke from calcium carbide waste residues
  • Method for preparing high-reactivity gasified coke from calcium carbide waste residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Select long flame coal (MSC), gas coal (WGC) and fat coal (DFC) from a certain place in my country respectively.

[0046] Among them, the sulfur content in fat coal is 1.62%; the volatile matter of long-flame coal, gas coal and fat coal is 37.62%, 29.19% and 28.48% respectively, the caking index is 4, 47 and 96 respectively, and the calcium content in the ash composition They are 0.9%, 0.6%, and 0.4% respectively.

[0047] Each of the above-mentioned individual coals is pulverized and screened to obtain coal powder with a particle size of <3mm.

[0048] Mix long-flame coal, gas coal and fat coal with mass ratios of 45%, 30% and 25% to obtain volatile V daf The blending coal is 32.85% and the caking index is 48.

[0049] Water is added to the blended coal until the water content is 8-12%, and the basic blended coal 1 is obtained.

[0050] The base blend coal 1 is tamped to obtain a bulk density of 1.10g / cm 3 The tamped coal sample was pushed into the coke oven, and t...

Embodiment 2

[0053] Select calcium carbide waste residue from a certain manufacturer, in which the calcium content is 48% and the water content is 1%.

[0054] The calcium carbide waste residue is crushed and ground to control its particle size to <0.075mm.

[0055] The volatile matter V obtained in Example 1 daf 32.85% and a cohesion index of 48 were added to the above-mentioned calcium carbide waste residue, and the quality of the added calcium carbide waste residue was 7% of the blended coal mass.

[0056] According to the proportion of each single coal in the blended coal, the calcium content in the ash composition, and the calcium content in the calcium carbide residue, the calcium content of the blended coal after adding the calcium carbide residue is calculated to be 4%.

[0057] Water is added to the blended coal with calcium carbide waste residue until the water content is 8-12%, and modified blended coal 1 is obtained.

[0058] The modified blend coal 1 is tamped to obtain a bu...

Embodiment 3

[0066] Non-caking coal (BNC), weakly caking coal (RNC) and coking coal (LJC) from a certain place in my country were selected respectively.

[0067] Among them, the sulfur content in coking coal is 1.78%; the volatile content of non-caking coal, weak caking coal and coking coal are 40.38%, 33.26% and 24.67% respectively; the caking index is 0, 38 and 94 respectively; 1.0%, 0.7%, 0.3%.

[0068] Each of the above-mentioned individual coals is pulverized and screened to obtain coal powder with a particle size of <3mm.

[0069] Mix non-caking coal, weakly caking coal and coking coal powder at mass ratios of 40%, 25% and 35% to obtain volatile V daf The blending coal is 33.26% and the caking index is 49.

[0070] Water is added to the blended coal until the water content is 8-12%, and the basic blended coal 2 is obtained.

[0071] The base blend coal 2 is tamped to obtain a bulk density of 1.10g / cm 3 The tamped coal sample was pushed into the coke oven, and the temperature was ...

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Abstract

The invention relates to a method for preparing high-reactivity gasified coke from calcium carbide waste residues, which comprises the steps of selecting a proper raw material coal type, measuring the caking index of the raw material coal and the mineral composition of the calcium carbide waste residues and the raw material coal, adjusting a coal blending scheme so as to enable the volatile component content of modified blended coal added with the calcium carbide waste residues to be 30-35%, the caking index to be 20-50, and the calcium content to be 3-5.5 wt.%, and coking to obtain gasified coke with the reactivity not lower than 60%. According to the method, the adding amount of the calcium carbide waste residues in coal blending is regulated and controlled through the low-cost and convenient-to-operate method, the utilization way of the calcium carbide waste residues is expanded, existing low-rank coal and high-sulfur coking coal which are rich in reserves are reasonably utilized, and the reactivity of the gasified coke is improved while the production cost of the gasified coke is reduced.

Description

technical field [0001] The invention belongs to the technical field of coal blending and coking in the coking industry, and relates to a method for preparing gasification coke, in particular to a method for preparing high-reactivity gasification coke by using industrial waste. Background technique [0002] Acetylene is the main raw material for the production of polyvinyl chloride (PVC). The current industrial production method of acetylene in my country is mainly obtained by hydrolysis of calcium carbide. [0003] The process of producing acetylene by adding water to calcium carbide is simple and mature. 1 ton of calcium carbide can produce more than 300 kg of acetylene gas, but at the same time, 10 tons of calcium carbide slurry with a solid content of about 12% will be produced. Further dehydration of the calcium carbide slurry can obtain calcium carbide waste residue. Therefore, for every 1t of PVC produced, about 1.5-1.8t of calcium carbide waste residue will be produce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B57/00
CPCC10B53/00C10B57/005
Inventor 焦海丽郭江邢孟文王美君申岩峰常丽萍鲍卫仁
Owner TAIYUAN UNIV OF TECH
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