Method for preparing briquette binder

A technology of binder and briquette, applied in the field of coal chemical industry, can solve the problems of low viscosity and poor strength, and achieve the effects of high catalytic activity, high cold and hot strength, and convenient operation.

Active Publication Date: 2013-05-22
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a method for preparing coal molding binder to solve the problems of low viscosity and poor strength of the existing coal molding binder

Method used

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  • Method for preparing briquette binder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In Example 1, a coal modification test was carried out using Xinjiang Heishan long-flame coal as a raw material.

[0046] 40g of 100-mesh pulverized coal, 15g of 100-mesh bentonite, 30g of urban waste water and catalyst Na 2 O 2g, mixed in a high-pressure reactor, fed a reducing gas mixture, wherein the CO content is 50%, the gas is purged and the initial pressure is set to 3MPa, and heated to a reaction temperature of 330°C at a speed of 15°C / min , reacted for 30min, and controlled the pressure in the kettle to reach 20MPa. After the reaction is finished, the reactor is cooled to room temperature, and the reaction materials are taken out, and the water and the coal materials are centrifuged with a 100-mesh filter, and the separated solids are briquette binders.

[0047] Use a caking index tester to measure the briquette binder according to GB / T 5447-1997. The caking index of the product is 85. The swelling value of the product is 8ml / 3g measured by the ammonium chlori...

Embodiment 2

[0049] In Example 2 of the present invention, a coal modification test was carried out using lignite II as a raw material.

[0050] With 200 mesh coal powder 45g, 100 mesh bentonite 5g, urban waste water 40g and catalyst Na 2 CO 3 1.5g, mixed in a high-pressure reactor, fed a reducing gas mixture, the CO content of which was 60%, the gas was purged and the initial pressure was set to 4MPa, heated to a reaction temperature of 340°C at a rate of 15°C / min , reacted for 60min, and controlled the pressure in the kettle to reach 25MPa. After the reaction is finished, the reactor is cooled to room temperature, and the reaction materials are taken out, and the water and the coal materials are centrifuged with a 100-mesh filter, and the separated solids are briquette binders.

[0051] Use a caking index tester to measure the briquette binder according to GB / T 5447-1997, the caking index of the product is 90, the swelling value of the product is 6ml / 3g measured by the ammonium chlor...

Embodiment 3

[0053] In Example 3 of the present invention, a coal modification test was carried out using lignite III as a raw material.

[0054] Put 50g of 200-mesh pulverized coal, 5g of 100-mesh bentonite, 45g of urban waste water and 2g of catalyst NaOH in a high-pressure reactor and mix them, and feed a reducing mixed gas, in which the CO content is 80%, the gas is purged and its initial pressure is set to 4MPa, heated to a reaction temperature of 340°C at a rate of 15°C / min, reacted for 40min, and controlled the pressure inside the kettle to reach 35MPa. After the reaction is finished, the reactor is cooled to room temperature, and the reaction materials are taken out, and the water and the coal materials are centrifuged with a 100-mesh filter, and the separated solids are briquette binders.

[0055] The briquette binder is measured by a caking index tester according to GB / T 5447-1997, the caking index of the product is 96, the swelling value of the product is 7ml / 3g measured by ...

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Abstract

The invention relates to a method for preparing a briquette binder. According to the method, pulverized coal and bentonite are taken as master batches and are matched with water as a solvent and a catalytic sodium agent so as to react at a high temperature and a high pressure for preparation of the briquette binder. The method has the advantages of obviously improving the coking property of coal briquette, being simple in technology and simple in operation and having obvious economic and social benefits. Raw materials are wide in source and have low cost.

Description

technical field [0001] The invention relates to a preparation method of a briquette binder, specifically, coal powder and bentonite are used as masterbatches, together with solvent water and a catalytic sodium agent, and a briquette is reacted under high temperature and high pressure in a reducing gas The binder method belongs to the technical field of coal chemical industry. Background technique [0002] Briquette is one of the effective ways to utilize weak and non-viscous pulverized coal. Briquette should have a certain strength, and its strength mainly depends on the quality and quantity of the binder used. Therefore, it is particularly necessary to research and develop low-cost and high-quality briquette binder. [0003] CN1252429A discloses "a method for preparing an inorganic coal binder". In this method, water is heated to 90-95°C, and potassium aluminum sulfate is put in. After it dissolves, potassium dichromate and the like are all put in and dissolved by stirring...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/12
Inventor 翟玲玲张永发崔新涛董东柳谢克昌
Owner TAIYUAN UNIV OF TECH
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