A Modified Pretreatment Method for Separation of Coal and Rock Components

A technology for coal and rock composition and pretreatment, applied in flotation, solid separation, etc., can solve the problem of poor flotation separation effect, small difference in flotation, and enlarge the difference in flotation between vitrinite and inert group. and other problems, to achieve the effect of increasing the difference in floatability, simple operation, and controllable modification effect.

Active Publication Date: 2017-06-30
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method adds modifying agent to the raw coal during the ball milling process, and combines microwave radiation to modify the raw coal to expand the difference in buoyancy between the vitrinite and the inertinite of coal rocks, thereby improving the vitrinite and vitrinite. The flotation separation effect of inert components fundamentally solves the problem of small differences in floatability of microscopic components of coal rocks and poor flotation separation effect

Method used

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  • A Modified Pretreatment Method for Separation of Coal and Rock Components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1, crushing the raw coal until the particle size is not greater than 0.125mm;

[0031] Step 2, placing zirconia balls with a diameter of 3mm and the crushed raw coal in step 1 in the microwave stirring ball mill of Example 1; the volume ratio of the zirconia balls to the crushed raw coal is 3:1;

[0032] Step 3: Turn on the agitator 2 of the microwave stirring ball mill, and perform ball milling under the condition that the rotating speed is 200rpm. When the agitator 2 is turned on, start to add 1% of the mass of raw coal after crushing into the ball mill barrel 1 through the dosing port 5. % modifying agent methyl alcohol, and control the adding time of the modifying agent to be 1min; after adding the modifying agent for 1min, turn on the microwave generator 3, and under the condition of 550W, microwave radiation to the material in the microwave stirring ball mill for 0.5min, Then close the microwave generator 3;

[0033] Step 4, after closing the microwave gener...

Embodiment 2

[0036] Step 1, crushing the raw coal until the particle size is not greater than 0.125mm;

[0037] Step 2, placing zirconia balls with a diameter of 5mm and the crushed raw coal in step 1 in the microwave stirring ball mill of Example 1; the volume ratio of the zirconia balls to the crushed raw coal is 4:1;

[0038] Step 3: Turn on the agitator 2 of the microwave agitation ball mill, and perform ball milling at a speed of 250 rpm. 10 minutes after the agitator 2 is turned on, start to add in the ball mill barrel 1 through the dosing port 5, which has a mass equal to the quality of the crushed raw coal. 4% modifying agent acetone, and control the adding time of the modifying agent to be 5min; open the microwave generator 3 after adding the modifying agent for 1min, and microwave the material in the microwave stirring ball mill for 2min under the condition that the power is 600W, Then close the microwave generator 3;

[0039] Step 4, after closing the microwave generator 2min i...

Embodiment 3

[0043] Step 1, crushing the raw coal until the particle size is not greater than 0.125mm;

[0044] Step 2, placing zirconia balls with a diameter of 5mm and the crushed raw coal in step 1 in the microwave stirring ball mill of Example 1; the volume ratio of the zirconia balls to the crushed raw coal is 5:1;

[0045] Step 3: Turn on the agitator 2 of the microwave stirring ball mill, and perform ball milling under the condition that the rotating speed is 150rpm. 5 minutes after starting the agitator 2, start to add in the ball mill barrel 1 through the dosing port 5. 5% modified agent ether, and control the adding time of the modified agent to be 5min; after adding the modified agent for 10 minutes, turn on the microwave generator 3, and irradiate the material in the microwave stirring ball mill for 5 minutes under the condition that the power is 450W, Then close the microwave generator 3; continue ball milling until the total time of ball milling reaches 30min;

[0046] Step ...

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Abstract

The invention discloses a modified pretreatment method for the separation of coal and rock components. The method includes: 1. crushing raw coal until the particle size is not greater than 0.125 mm; 2. crushing zirconia balls with a diameter of 3 mm to 5 mm Put the crushed raw coal in the microwave stirring ball mill; 3. Turn on the stirrer of the microwave stirring ball mill for ball milling. During the ball milling process, add the modifying agent to the ball mill barrel for 1 to 6 times, and carry out microwave radiation; 4. Wait for After the ball milling, the materials in the microwave stirring ball mill are taken out, and the zirconia balls are removed after cooling at room temperature to obtain the modified coal material. The present invention adds modifying agents to the raw coal during the ball milling process and modifies the raw coal in combination with microwave radiation to expand the difference in buoyancy between vitrinite and inertinite in coal rocks, thereby improving the vitrinite and vitrinite components. The flotation separation effect of inert components fundamentally solves the problem of small differences in floatability of microscopic components of coal rocks and poor flotation separation effect.

Description

technical field [0001] The invention belongs to the technical field of coal surface modification, and in particular relates to a modification pretreatment method for coal rock component separation. Background technique [0002] According to coal petrology methods, coal microcomponents can be divided into vitrinite, inertinite and exinite. The structure and properties of each microscopic component in coal are different, and their status and use in coal processing and utilization are also different. For example, vitrinite can be used in a large proportion in coal blending, coking, liquefaction and other industries; However, it is a high-quality raw material for preparing carbon materials such as graphite and activated carbon. The microscopic composition of coal rocks has an impact on the fields of coal coking industry, coal liquefaction industry, coal combustion, coal water slurry industry, coal oxidation and gasification, primary sedimentary deposits and biomineralization (R...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03B1/00B03B1/04
Inventor 赵伟周安宁杨志远
Owner XIAN UNIV OF SCI & TECH
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