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High-temperature adhesive for forming jet coal and quick lime mixed pellets and preparation method thereof

A high-temperature binder and long-flame coal technology, which is applied in the petroleum industry, carbides, solid fuels, etc., can solve the problems of poor compressive strength of pellets, achieve the effects of low cost, wide sources, and increased strength

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

[0005] The present invention aims at the problem of poor compressive strength after pyrolysis of the mixed pellets of long-flame coal and quicklime without caking, and provides a new type of high-temperature binder, which can effectively improve the non-caking properties. High-temperature compressive strength of mixed pellets of long-flame coal and quicklime

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Adding CS to Caking Coal 2 / NMP mixed solvent (CS 2 and NMP volume ratio is 1:3) for extraction (caking coal powder and CS 2 The weight ratio of / NMP mixed solvent is 1:40), obtains extract after centrifugation, then adds rubber powder, cross-linking agent sulfur, promotor carbamic acid and activator zinc oxide in extract; The add-on of rubber powder is 0.2 parts by weight of caking coal, the addition of crosslinking agent sulfur is 0.005 parts by weight of caking coal, accelerator carbamic acid is 0.001 parts by weight of caking coal, activator zinc oxide is 0.01 parts by weight of caking coal 0.002, fully mixed evenly, and then reacted at a temperature of 120°C and a pressure of 0.1MPa for 3 hours, obtained a residue by distillation, and washed and dried the residue to obtain a high-temperature adhesive.

[0027] Grind the long-flame coal (cohesion index is 0), quicklime and the high-temperature binder to a particle size ≤ 150 μm; mix the pulverized long-flame coal,...

Embodiment 2

[0029] Add CS2 / NMP mixed solvent (CS 2 and NMP volume ratio is 1:3.5) for extraction (caking coal powder and CS 2 The weight ratio of NMP / NMP mixed solvent is 1:45), obtain extract after centrifugation, then add rubber powder, cross-linking agent thiuram disulfide, accelerator dimethyl dithioaminomethyl zinc in the extract and activator zinc oxide, the addition of rubber powder is 0.4 of the weight part of caking coal, the addition of crosslinking agent thiuram disulfide is 0.007 of the weight part of caking coal, and the accelerator dimethyl dithiocarbamate Base zinc is 0.002 parts by weight of caking coal, activator zinc oxide is 0.003 parts by weight of caking coal, fully mixed, then reacted at a temperature of 150 °C and a pressure of 0.2 MPa for 4 hours, and obtained a residue by distillation. The residue is washed and dried to obtain a high-temperature adhesive.

[0030] Grind the long-flame coal (caking index is 0, caking index greater than 50), quicklime and the high...

Embodiment 3

[0032] Add CS2 / NMP mixed solvent (CS 2 and NMP volume ratio is 1:4) for extraction (caking coal powder and CS 2The weight ratio of / NMP mixed solvent is 1:50), after centrifugation obtains extract, then in extract, add rubber powder, cross-linking agent sulfur, promotor carbamic acid and activator zinc oxide, the add-on of rubber powder is 0.6 parts by weight of caking coal, the addition of crosslinking agent sulfur is 0.01 parts by weight of caking coal, accelerator carbamic acid is 0.003 parts by weight of caking coal, activator zinc oxide is 0.03 parts by weight of caking coal 0.002, fully mixed evenly, and then reacted at a temperature of 200°C and a pressure of 0.3MPa for 5 hours, obtained a residue by distillation, and washed and dried the residue to obtain a high-temperature adhesive.

[0033] Pulverize the long-flame coal (cohesion index is 0), quicklime and the high-temperature binder; mix the pulverized long-flame coal, quicklime and high-temperature binder accordin...

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Abstract

The invention discloses a high-temperature adhesive for forming jet coal and quick lime mixed pellets and a preparation method thereof. The high-temperature adhesive is prepared from the following steps: adding a CS2 / NMP mixed solvent into crushed adhesive coal particles for extraction and performing centrifugal separation to obtain an extraction solution; adding rubber powder, a crosslinking agent, an accelerant and an activating agent into extract liquor to obtain a mixture; performing a reaction on the mixture; and distilling a reaction product, and washing and drying the residues to obtain the high-temperature adhesive. The invention further provides a method of improving the high-temperature strength of the 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 press moulding to obtain the pellets; and performing pyrolysis on the pellets to obtain high-strength pyrolyzed pellets. The high-temperature adhesive disclosed by the invention is wide in source of raw materials and low in cost, can effectively improve the strength of the jet coal and the quick lime mixed pellets without cohesiveness after pyrolysis, and meets the demand of directly feeding the pellets into a calcium carbide furnace to be smelted.

Description

technical field [0001] The invention relates to a high-temperature adhesive, further relates to a preparation method and application of the high-temperature adhesive, and belongs to the field of adhesives. 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 this time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/14C01B32/942
CPCC10L5/14C10L2230/14
Inventor 赵飞翔祁娟邓鑫王建民高建薛逊吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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