A kind of electric flotation separation method of coal and rock micro-components

A technology of microscopic components and separation methods, applied in flotation, solid separation, selective deposition, etc., can solve problems such as insufficient effect, reduced flotation yield, cumbersome flotation process, etc., to achieve improved flotation Separation effect, improvement of wettability and sedimentation, effect of improvement of flotation separation efficiency

Active Publication Date: 2017-02-15
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when these methods increase the enrichment rate, the flotation yield is often reduced, and the multi-stage flotation process is cumbersome, but the effect is not obvious enough.

Method used

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  • A kind of electric flotation separation method of coal and rock micro-components
  • A kind of electric flotation separation method of coal and rock micro-components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1. Crushing and grinding the coal sample until the particle size is less than 0.074mm, then adding water to adjust the slurry to obtain a coal slurry with a concentration of 30g / L;

[0028] Step 2, adjust the temperature of the coal slurry described in step 1 to be 20°C, then add hydrochloric acid (5mol / L) until the pH value of the coal slurry is 2.0, then add the collector and stir evenly; the collector is oleic acid (Emulsified kerosene, stearic acid or humic acid can be used instead), the amount of collector added is 500g of collector per ton of raw coal;

[0029] Step 3: Add the coal slurry that has been evenly stirred with the collector in step 2 into the flotation tube, so that both the positive electrode 1 and the negative electrode 2 are in the coal slurry, and then energize the positive electrode 1 and the negative electrode 2 in the flotation tube , the control current density is 3A / dm 2 , carry out electric flotation to the coal slurry in the flotation ...

Embodiment 2

[0031] Step 1. Crushing and grinding the coal sample until the particle size is less than 0.074mm, adding water to adjust the slurry to obtain a coal slurry with a concentration of 20g / L;

[0032] Step 2, adjust the temperature of the coal slurry described in step 1 to be 10°C, then add hydrochloric acid (2mol / L) until the pH value of the coal slurry is 3.0, then add collector and stir evenly; the collector is emulsified kerosene (Oleic acid, stearic acid or humic acid can be used instead), and the amount of collector added is 1000g of collector per ton of raw coal;

[0033] Step 3: Add the coal slurry that has been evenly stirred with the collector in step 2 into the flotation tube, so that both the positive electrode 1 and the negative electrode 2 are in the coal slurry, and then energize the positive electrode 1 and the negative electrode 2 in the flotation tube , the control current density is 2A / dm 2, carry out electric flotation to the coal slurry in the flotation tube,...

Embodiment 3

[0035] Step 1, crushing and grinding the coal sample until the particle size is less than 0.074mm, adding water to adjust the slurry to obtain a coal slurry with a concentration of 50g / L;

[0036] Step 2, adjust the temperature of the coal slurry described in step 1 to be 30°C, then add hydrochloric acid (5mol / L) to the pH value of the coal slurry to 4.0, then add the collector and stir evenly; the collector is stearin Acid (can be replaced by emulsified kerosene, oleic acid or humic acid), the amount of collector added is 750g of collector per ton of raw coal;

[0037] Step 3: Add the coal slurry that has been evenly stirred with the collector in step 2 into the flotation tube, so that both the positive electrode 1 and the negative electrode 2 are in the coal slurry, and then energize the positive electrode 1 and the negative electrode 2 in the flotation tube , the control current density is 1A / dm 2 , carry out electric flotation to the coal slurry in the flotation tube, the...

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Abstract

The invention discloses an electric flotation separation method for coal rock microcomponents. The method comprises the following steps: 1. Add water to the raw coal which has been crushed and ground until the particle size is less than 0.074mm, and the concentration obtained is 20g / L-50g / L of coal slurry; 2. Add hydrochloric acid to the coal slurry until the pH value is 2.0-4.0, then add collector and stir evenly; 3. Add the coal slurry after adding collector and stir evenly into the flotation tube, and then The positive electrode and negative electrode in the flotation tube are energized, and the current density is controlled to be 1A / dm2~5A / dm2, and the coal slurry in the flotation tube is electrically flotation to realize the separation of coal and rock microscopic components. The invention is a method combining electrolytic oxidation, electrolytic coagulation and flotation, which can effectively control the buoyancy of inertinite and vitrinite, so that the inertinite can be settled in the sediment as much as possible, and the vitrinite Enriched in the floating matter, the effective separation of vitrinite and inertinite in coal rock can be achieved.

Description

technical field [0001] The invention belongs to the technical field of coal rock microcomponent separation, and in particular relates to an electric flotation separation method for coal rock microcomponents. Background technique [0002] China's coal resources are dominated by low-coalification coals, and studies have found that the content of inert components in these coals is generally high. For example, the inertinite content of Shenfu coal is generally 30%-70%, that of Binchang coal is 44%-89%, that of Huanglong coal is 24%-63%, that of Lingwu coal is 30%-69%, that of Huating 30% to 50% of coal, 30% to 47% of Jingyuan coal, 40% to 57% of Datong coal, and an average of about 40% of Hami coal, and the content of inertinite in Datong coal is also between 30% and 45%. [0003] The microcomponents of coal rock have an important influence on the industrial application of coal. For example, a high content of inertite in coal will affect the processing and utilization performa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B1/00B03B1/04B03D1/00B03D3/02
Inventor 赵伟周安宁杨志远
Owner XIAN UNIV OF SCI & TECH
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