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Coal rock maceral enrichment method based on charged micro-nano bubble flotation

A micro-component, micro-nano technology, applied in flotation, solid separation and other directions, can solve the problems of the enrichment of difficult coal and rock components, the restriction of fine processing and quality transformation of coal resources, and the small difference of surface physical and chemical properties. , to achieve the effect of improving the efficiency of sorting and enrichment, fully separating and enriching, convenient and flexible operation

Pending Publication Date: 2022-04-08
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the small difference in surface physical and chemical properties of vitrinite and inertinite, it is difficult to quickly and effectively enrich coal rock components by conventional flotation methods, so that the fine processing and qualitative transformation of coal resources in my country has been restricted. Certain restrictions

Method used

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  • Coal rock maceral enrichment method based on charged micro-nano bubble flotation
  • Coal rock maceral enrichment method based on charged micro-nano bubble flotation
  • Coal rock maceral enrichment method based on charged micro-nano bubble flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Select the anionic sodium lauryl sulfate solution that solution concentration is 0.25mM / L to prepare charged micro-nano bubbles (such as figure 2 Shown, the particle size of charged bubble is between 100-200nm), gets 400mL in order to flotation test, promptly charged micro-nano bubble solution accounts for pulp volume fraction is 40%, and inorganic salt ion aluminum chloride is 90mg, captures The dosage of kerosene as a absorbent is 2000g / t, and the dosage of 2-octanol as a foaming agent is 600g / t.

Embodiment 2

[0032] Example 2 is similar to Example 1, except that the concentration of sodium dodecyl sulfate solution for preparing charged micro-nano bubbles is 0.75 mM / L. The particle size of the prepared charged bubbles is between 100-200nm.

Embodiment 3

[0034] Example 3 is similar to Example 1, except that the concentration of sodium dodecyl sulfate solution for preparing charged micro-nano bubbles is 1.0 mM / L. The particle size of the prepared charged bubbles is between 100-200nm.

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Abstract

The invention discloses a coal rock maceral enrichment method based on charged micro-nano bubble flotation, which comprises the following steps: crushing a coal sample, adjusting vitrinite and inertinite in a system to have opposite electrical properties by using an inorganic salt ionic solution, then preparing charged micro-nano bubbles by using an ionic surfactant, and carrying out flotation on the charged micro-nano bubbles to obtain the coal rock maceral enrichment. Coal rock components with charges opposite to the charges of the charged bubbles are accurately and rapidly enriched into concentrate through a foam flotation method. Accurate and rapid adhesion of charged bubbles and coal rock components with opposite electrical properties of the charged bubbles is enhanced through the electrostatic attraction effect, efficient enrichment of vitrinite and inertinite is completed, the operation is simple and easy to implement, the cost is low, and the coal rock component enrichment efficiency is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of coal rock microcomponent enrichment, in particular to a coal rock microcomponent enrichment method based on charged micro-nano bubble flotation. Background technique [0002] Coal is an organic rock composed of various organic and inorganic components. The organic microscopic components can be divided into vitrinite, inertinite and exinite, and the inorganic components are mostly gangue minerals. The properties of different coal rock components are significantly different, resulting in different application fields. For example, vitrinite is suitable for light solid fuels, liquefied raw materials, gasification raw materials, etc., while inertinite is more suitable for the preparation of carbon materials such as activated carbon and graphite. . Obtaining high-purity single-component coal and rock for utilization can greatly improve the level of clean and efficient utilization of coal resources in my count...

Claims

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Application Information

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IPC IPC(8): B03D1/02B03D1/002
Inventor 王磊李孟乐桂夏辉邢耀文夏阳超倪中海
Owner CHINA UNIV OF MINING & TECH
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