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Method for preparing water-charcoal slurry with semi-coke powder as raw material

A technology of semi-coke powder and carbon slurry, which is applied in the field of clean coal, can solve the problems of increasing the internal water content and difficulty in increasing the slurry concentration, and achieve the effect of expanding the application field

Inactive Publication Date: 2016-01-20
SHAANXI RADIO TV UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with pulverized coal, the internal water content of semi-coke is lower, but the oxygen-containing polar functional groups in the structure will absorb a certain amount of water molecules, thereby increasing the internal water content, making it difficult to increase the concentration of the slurry

Method used

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  • Method for preparing water-charcoal slurry with semi-coke powder as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: The selected additive is polyoxyethylene ether-acrylate polymer and sodium carboxymethyl cellulose, and its mass fraction is 1.0% of blue charcoal powder dry material, wherein, polyoxyethylene ether-acrylate polymer 0.5% , Sodium Carboxymethyl Cellulose 0.5%. The preparation method of polyoxyethylene ether-acrylate polymer is: dissolve a certain amount of polyoxyethylene ether in water at 60°C, stir for 30 minutes, add dropwise acrylate and initiator ammonium persulfate, polyoxyethylene ether and acrylic acid The molar ratio of the ester is 1:1.5, the amount of ammonium persulfate is 10% (mass fraction) of the amount of acrylate, and the amount of water is 60% of the total weight of the added material. React for 4 hours at 60-80°C to obtain polyoxyethylene ether - acrylate polymers.

[0026] The selected grading scheme is: >200 mesh 90%, 100-200 mesh 6%, 60-100 mesh 4%, mix 50g of blue charcoal powder, 38ml of water and additives according to the above st...

Embodiment 2

[0027] Embodiment 2: The selected additive is polyoxyethylene ether-acrylate polymer and sodium carboxymethyl cellulose, and its mass fraction is 1.0% of blue charcoal powder dry material, wherein, polyoxyethylene ether-acrylate polymer 0.5% , Sodium Carboxymethyl Cellulose 0.5%. The selected grading scheme is: >200 mesh 80%, 100-200 mesh 15%, 60-100 mesh 5%, mix 50g of blue charcoal powder, 37ml of water and additives according to the above steps and stir quickly, then at 1500r min -1 After stirring for 10 minutes, a water-charcoal slurry product was prepared. The concentration of the water-charcoal slurry is 57.14%, the viscosity is 1200mpa·S, the stability is high, and the fluidity is good. There is no water separation after standing for 5 days, and the soft sediment can be recovered after standing for 17 days.

Embodiment 3

[0028] Embodiment 3: The selected additive is polyoxyethylene ether-acrylate polymer and sodium carboxymethyl cellulose, and its mass fraction is 1.0% of blue charcoal powder dry material, wherein, polyoxyethylene ether-acrylate polymer 0.5% , Sodium Carboxymethyl Cellulose 0.5%. The selected gradation scheme is: >200 mesh 67%, 100-200 mesh 18%, 60-100 mesh 15%, mix 50g of semi-coke powder, 38ml of water and additives according to the previous steps, and then use 1500r min -1 After stirring for 10 minutes, a water-charcoal slurry product was prepared. The concentration of the water-charcoal slurry is 56.50%, the viscosity is 900mpa·S, the fluidity is good, and the stability is high. There is no water separation after standing for 4 days, and the soft sediment can be recovered after standing for 10 days.

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Abstract

The invention provides a method for preparing aqueous charcoal pulp by using semi coke powder as a raw material. The method comprises the following steps: firstly, putting the semi coke powder in a drying tank for drying treatment; grinding to obtain semi coke powder with different granularities in a mill by adopting a dry-method ore grinding process; mixing materials according to a specified grading scheme; dissolving a certain amount of additive into water, mixing and stirring with the semi coke powder until a uniform paste, namely the aqueous charcoal pulp with high concentration and good stability, is obtained. The method is simple in process and convenient to operate, and can be used for producing by directly utilizing an existing aqueous charcoal pulp production device; the prepared aqueous charcoal pulp product can completely achieve the application standards of combustion, gasification and other industries, and has an important meaning in high-efficiency and clean utilization of existing semi coke powder resources.

Description

technical field [0001] The invention belongs to the technical field of clean coal, and in particular relates to a method for preparing water-charcoal slurry by using semi-coal powder as a raw material. Background technique [0002] my country's low-metamorphic bituminous coal resources (long-flame coal, non-caking coal, and weakly caking coal) account for more than 60% of coal resources. The Ordos Basin and northern Shaanxi (Yulin, Yan'an) are approved by the National Development and Reform Commission (1998) No. 1404 The country's only energy and heavy chemical industry base is rich in low-metamorphic coal resources, featuring low ash, low sulfur, low phosphorus, low ash melting point, high calorific value, high inert component content, and high calcium oxide content. 34.9%. At present, this resource is mainly used as power coal or semi-coke, tar and gas products are obtained through medium and low temperature dry distillation (pyrolysis). Studies have shown that the tar con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23K1/02
Inventor 兰新哲苏婷宋永辉时明亮赵西成
Owner SHAANXI RADIO TV UNIV