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High-temperature adhesive and method of increasing high-temperature strength of jet coal and quick lime mixed pellets

A high-temperature binder and long-flame coal technology, used in the petroleum industry, fuel additives, solid fuels, etc., can solve problems such as poor compressive strength, and achieve the effects of low cost, wide sources, and improved strength after pyrolysis

Inactive Publication Date: 2017-05-31
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of the poor compressive strength of the pellets after pyrolysis of the mixed pellets of non-caking long-flame coal and quicklime, the present invention provides a new type of composite high-temperature binder. The binder can effectively improve the high-temperature strength of long-flame coal and quicklime pellets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Adding CS to Caking Coal 2 / NMP mixed solvent (CS 2 The volume ratio with NMP is 1:1.5) for extraction (caking coal powder and CS 2 The weight ratio of NMP / NMP mixed solvent is 1:20); After centrifugation, the extract is obtained; then, high-temperature coal tar (coking tar at 1000°C) and crosslinking agent benzoyl peroxide and high-temperature coal tar are added to the extract. The addition amount is 0.2 parts by weight of caking coal, the addition amount of crosslinking agent benzoyl peroxide is 0.005 parts by weight of cohesive coal, mix well and then react at a temperature of 100°C and a pressure of 0.1 MPa for 3 hours, and then distill A residue is obtained, and the residue is washed and dried to obtain a high-temperature adhesive.

[0028] Grind the long-flame coal (caking index is 0), quicklime and high-temperature binder until the particle size is less than 150 microns, and grind the pulverized long-flame coal, quicklime and high-temperature binder according t...

Embodiment 2

[0030] Add CS to caking coal powder (caking index greater than 50, particle size less than 75μm) 2 / NMP mixed solvent (CS 2 The volume ratio with NMP is 1:2.5) for extraction (caking coal powder and CS 2 The weight ratio of NMP / NMP mixed solvent is 1:30), obtain extract after centrifugation, then add high-temperature coal tar (coking tar at 1000 ℃) and crosslinking agent benzoyl peroxide to extract, the high-temperature coal tar The addition amount is 0.4 parts by weight of caking coal, the addition amount of cross-linking agent benzoyl peroxide is 0.007 parts by weight of cohesive coal, fully mixed, and then reacted at a temperature of 150 ° C and a pressure of 0.2 MPa for 4 hours, passed The residue is obtained by distillation, and the residue is washed and dried to obtain a high-temperature binder.

[0031] Grind the long-flame coal (cohesion index is 0), quicklime and high-temperature binder until the particle size is less than 150 microns, and grind the pulverized long-...

Embodiment 3

[0033] Adding CS to Caking Coal 2 / NMP mixed solvent (CS 2 The volume ratio of NMP and NMP is 1:2.0) for extraction (caking coal powder and CS 2 The weight ratio of NMP / NMP mixed solvent is 1:25), and the extract is obtained after centrifugation, and then high-temperature coal tar (coking tar at 1000°C) and cross-linking agent dicumyl peroxide, high-temperature coal tar are added to the extract The addition amount of the compound is 0.5 parts by weight of the caking coal, and the addition amount of the cross-linking agent dicumyl peroxide is 0.01 parts by weight of the cohesive coal, mix well, and then react at a temperature of 200°C and a pressure of 0.3 MPa for 5 hours , the residue is obtained by distillation, and the residue is washed and dried to obtain a high-temperature binder.

[0034] Pulverize the long-flame coal (caking index is 0), quicklime and high-temperature binder, and mix the pulverized long-flame coal, quicklime and high-temperature binder according to the ...

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Abstract

The invention discloses a high-temperature adhesive and a method of increasing high-temperature strength of jet coal and quick lime mixed pellets. The high-temperature adhesive is prepared from the following steps: adding a CS2 / NMP mixed solvent into the crushed adhesive coal particles to extract and performing centrifugal separation to obtain an extraction liquid; adding high-temperature coal tar and a crosslinking agent into the extraction liquid, and uniformly stirring the same to obtain a mixture; performing a reaction on the mixture; and distilling the reaction product, and washing and drying the residue to obtain the high-temperature adhesive. The invention also discloses the method of increasing high-temperature strength of jet coal and quick lime mixed pellets by using the high-temperature adhesive. The method comprises the following steps: uniformly mixing the jet coal, the quick lime and the high-temperature adhesive, and performing compression forming to obtain pellets; and pyrolyzing the pellets to obtain high-strength pyrolyzed pellets. According to the invention, the strength of the pyrolyzed jet coal and quick lime mixed pellets without a caking property can be increased to a great extent, so that the pellets can meet the requirement of being fed to a calcium carbide furnace to be smelted.

Description

technical field [0001] The invention relates to a high-temperature binder and its use in improving the high-temperature strength of long-flame coal and quicklime mixed pellets, belonging to the field of binders. Background technique [0002] Long-flame coal is the bituminous coal with the lowest degree of metamorphism, and the youngest bituminous coal whose coalification degree is only higher than that of lignite, ranging from no caking to weak caking. When bituminous coal is heated in the absence of air, the organic macromolecules in the coal are decomposed by heat to form a mixture of gas, liquid and solid three-phase coexistence, which is called colloid. The ability of colloid to bind itself or foreign inert substances , which is called the caking property of coal. For coal with strong cohesion, there are many liquid products in the colloid body and the fluidity is suitable, which can be well filled into the gap between solid particles and has a certain viscosity. At thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/14C10L5/00C10L5/04C10L10/00
CPCC10L5/14C10L5/00C10L5/04C10L10/00
Inventor 赵飞翔祁娟邓鑫高建王建民薛逊吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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