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A kind of preparation method of composite molded coal binder

A technology of composite briquette and binder, which is used in solid fuel, petroleum industry, fuel and other directions, can solve the problems of poor moisture-proof and waterproof performance, poor bonding performance, low cohesiveness, etc., and achieves easy operation, suitable for large The effect of large-scale promotion and application and simplified process

Active Publication Date: 2018-12-28
山东沾化民恒环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem mainly solved by the present invention: Although the commonly used organic binders can improve the water resistance and combustion performance of briquettes, the bonding performance is not good and the price is expensive, while the inorganic binders are cheap in raw materials, but the bonding properties are low. Low, the present situation of moisture-proof and waterproof performance is poor, provides a kind of with yam powder as raw material, makes yam starch powder, then yam starch is modified with glycerin and oxalic acid to obtain yam liquefaction, subsequently yam liquefaction and bentonite, water The preparation method of composite briquette binder can be obtained by mixing reaction of glass, magnesium oxide and other substances, drying after mixing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023]First weigh 250g yam powder, pass it through a 120 mesh sieve, mix it with deionized water at a solid-to-liquid ratio of 1:8, adjust the pH value of the mixed solution to 9.5 with a concentration of 2mol / L sodium hydroxide solution, and mix it with Put the solution into a water bath, raise the temperature to 50°C, keep stirring and mixing at this temperature for 2 hours, let it stand for 20 minutes after the stirring, and separate the lower precipitate; then add the above-mentioned lower precipitate to the deionized In the water, stir and suspend, let stand to settle, and filter the residue by suction. After repeating the suspension and precipitation steps twice, the mixture is centrifuged at 3000r / min for 10 minutes to obtain the precipitate, and then the precipitate is re-according to the solid-to-liquid ratio of 1. :5 was added to deionized water to obtain a starch suspension, and after removing impurities such as large particles in the lower layer, centrifuged at a sp...

example 2

[0026] First weigh 300g yam powder, pass it through a 130 mesh sieve, mix it with deionized water at a solid-to-liquid ratio of 1:8, adjust the pH value of the mixed solution to 9.8 with a concentration of 2mol / L sodium hydroxide solution, and mix it with Put the solution into a water bath, raise the temperature to 55°C, keep stirring and mixing at this temperature for 2.5 hours, let stand for 25 minutes after the stirring, and separate the lower sediment; then add the lower sediment obtained above at a solid-to-liquid ratio of 1:5 Stir and suspend in deionized water, let stand to settle, and get the filter residue by suction filtration. After repeating the suspension and precipitation steps for 2.5 times, the mixture is centrifuged at 3500r / min for 13 minutes to obtain the precipitate, and then the precipitate is re-according to the solid-liquid ratio Add deionized water at 1:5 to obtain starch suspension, remove impurities such as large particles in the lower layer, and then ...

example 3

[0029] First take 350g yam powder, pass it through a 140 mesh sieve, mix it with deionized water at a solid-to-liquid ratio of 1:8, adjust the pH value of the mixed solution to 10.0 with a concentration of 2mol / L sodium hydroxide solution, and mix the adjusted Put the solution into a water bath, raise the temperature to 60°C, keep stirring and mixing at this temperature for 3 hours, let it stand for 30 minutes after the stirring, and separate the lower precipitate; then add the above-mentioned lower precipitate to the deionized In water, stir and suspend, let stand to settle, and filter the residue by suction, repeat the suspension and precipitation steps for 3 times, centrifuge the mixture at 4000r / min for 15min to obtain the precipitate, and then re-set the precipitate according to the solid-liquid ratio of 1 :5 was added to deionized water to obtain a starch suspension, and after removing impurities such as large particles in the lower layer, centrifuged at a speed of 7000r / ...

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PUM

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Abstract

The invention discloses a preparing method of composite coal binder, and belongs to the technical field of binder preparation. Chinese yam powder is used as a raw material to prepare Chinese yam starch powder, the Chinese yam starch powder is modified with glycerinum and oxalic acid to obtain a Chinese yam liquefied product, then the Chinese yam liquefied product, bentonite, sodium silicate, magnesium oxide and other substances are mixed for reaction, and the composite coal binder can be obtained after mixing and drying. It is proved through examples that the preparing method is easy to operate, Chinese yam powder is used as a raw material, the process is simplified while production cost is reduced, environment protection is achieved, and the prepared briquette coal binder is high in cohesiveness and stability, good in dampproofness and waterproofness, wide in market prospect and suitable for large-scale application and popularization.

Description

technical field [0001] The invention discloses a preparation method of a composite molded coal binder, which belongs to the technical field of binder preparation. Background technique [0002] Briquette is a kind of secondary processed coal which is made by adding briquette binder to pulverized coal, which is used in gasifier and replaces anthracite lump coal. [0003] At present, there are still a large number of areas that use briquette, firewood, lignite, bituminous coal, and earth coke as civil fuels. Due to the advantages of convenient transportation and smokeless combustion of earth coke, and the need for dust control in many areas, environmental protection departments , it is stipulated that only earth coke can be used, and the use of other smoky fuels is restricted, so earth coke has become a fuel commonly used in cities and towns. However, earth coke brings a lot of inconvenience to users due to its high price, large crushing loss, high ash sulfur content, and diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L5/10C10L5/12C10L5/14
CPCC10L5/105C10L5/12C10L5/14
Inventor 陈建峰张明王统军
Owner 山东沾化民恒环保材料有限公司