Radiation-grafting-based preparation method for dense medium used for coal preparation

A technology for dense medium and coal preparation, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of difficult recovery and large loss of dense medium powder, and achieve energy saving, medium consumption reduction, and good social benefits. Effect

Active Publication Date: 2019-01-25
河南省核力科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention proposes a preparation method for preparing dense medium for coal preparation based on irradiation grafting, which solves the problems of large loss and difficult recovery of existing heavy medium powder

Method used

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  • Radiation-grafting-based preparation method for dense medium used for coal preparation
  • Radiation-grafting-based preparation method for dense medium used for coal preparation
  • Radiation-grafting-based preparation method for dense medium used for coal preparation

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Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0017] A preparation method for preparing a dense medium for coal preparation based on irradiation grafting, the steps are as follows:

[0018] Make the pre-adsorbent castor oil fatty acid sodium (BMN) into an aqueous solution with deionized water at a mass concentration of 40%, 45%, and 50%, and add it and magnetite powder to the mill powder at a mass ratio of 1:1000 In the machine, when the particle size of the mineral powder is 0.075mm, add 50% mass concentration of acrylic acid solution, and its mass ratio with the magnetite powder is 1:1000. After grinding for 30 minutes, the particle size of the mineral powder is about 0.061mm. Radiation source 60 Co, radiation dose rate 2.6×10 3 Gy / h, the irradiation dose is 10000 Gy, the acrylic acid is grafted onto the magnet mineral powder by γ-ray irradiation, and the final product is obtained after filtering and drying.

[0019] The laboratory performance and on-site media consumption of the tested product are shown in Table 1. ...

Embodiment 4-6

[0022] A preparation method for preparing a dense medium for coal preparation based on irradiation grafting, the steps are as follows:

[0023] Make the pre-adsorbent sulfonated castor oil (BSN) into an aqueous solution with deionized water at a mass concentration of 40%, 45%, and 50%, and add it and magnetite powder to the milling powder at a mass ratio of 1:1000 In the machine, when the particle size of the mineral powder is 0.075mm, add 50% mass concentration of acrylic acid solution, and its mass ratio with the magnetite powder is 1:1000. After grinding for 30 minutes, the particle size of the mineral powder is about 0.061mm. Radiation source 60 Co, radiation dose rate 2.6×10 3 Gy / h, the irradiation dose is 10000 Gy, the acrylic acid is grafted onto the magnet mineral powder by γ-ray irradiation, and the final product is obtained after filtering and drying.

[0024] Product performance data is shown in Table 2.

Embodiment 7-11

[0026] A preparation method for preparing a dense medium for coal preparation based on irradiation grafting, the steps are as follows:

[0027] The pre-adsorbent sulfonated castor oil (BSN) is made into an aqueous solution with deionized water at a mass concentration of 45%, and it is added to the pulverizer with magnetite powder at a mass ratio of 1:1000, and ground to ore When the powder particle size is 0.075mm, add 50% mass concentration of acrylic acid solution, and its mass ratio with magnetite powder is 1:1000. After grinding for 30 minutes, the particle size of mineral powder is about 0.061mm. 60 Co, radiation dose rate 2.6×10 3 Gy / h, the irradiation dose is 10000, 20000, 30000, 40000, 50000Gy, the acrylic acid is grafted onto the magnet mineral powder by γ-ray irradiation, and the final product is obtained by drying after filtration.

[0028] Product performance data are shown in Table 3.

[0029] Table 1

[0030]

[0031] Table 2

[0032]

[0033] table 3 ...

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Abstract

The invention provides a radiation-grafting-based preparation method for a dense medium used for coal preparation. The dense medium powder uses coarse magnetite powder as a raw material, wet grindingis conducted after the coarse magnetite powder is mixed with a high concentration aqueous solution of sulfonated castor oil (BSN) or castor oil sodium aliphatate (BMN), an acrylic acid aqueous solution is then sprayed for wet grinding to the required particle size, and finally acrylic acid is grafted to magnetite powder through gama ray irradiation to obtain a final product. The increase of the particle size of the magnetite powder has two advantages that 1, the grinding time is reduced in a fine grinding stage, energy is saved, the production cost is reduced, and the method has good social benefits; 2, the magnetite powder relatively large in particle size is easy to recycle, medium consumption is reduced, compared with traditional magnetite powder, the medium consumption can be reduced by 10-20%, and economic benefits are increased for coal preparation plants.

Description

technical field [0001] The invention relates to the technical field of wet dense medium coal preparation, and relates to a method for preparing dense medium for coal preparation based on irradiation and grafting. Background technique [0002] Coal is the main energy source in my country. In 2017, the output of raw coal was about 3.4 billion tons, and the washing rate of raw coal was about 70%. Moreover, with the improvement of my country's environmental protection requirements, the washing rate of raw coal will further increase. [0003] The most commonly used coal preparation method is dense medium coal preparation. Dense medium coal preparation refers to the process where the density is greater than 1g / cm 3 In the medium, coal preparation is carried out according to the difference in particle density. Dense medium powder is a material used to increase liquid density in dense medium coal preparation. At present, the commonly used dense medium powder is magnetite powder, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B5/44C08F292/00C08F220/06C08F2/48
CPCB03B5/445C08F2/48C08F292/00C08F220/06
Inventor 路永广张晓丽杨胜杰张国立梁亚丽
Owner 河南省核力科技发展有限公司
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