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Method for treating slime water by employing coal gangue-based flocculant

A technology of coal gangue and flocculant, which is applied in the field of coal chemical industry, can solve the problems of collapse, landslide, debris flow, gangue ecological factor harm, land environment deterioration and other problems, and achieves the effect of solving harm, improving comprehensive utilization rate and strengthening commercial competitiveness.

Inactive Publication Date: 2017-06-13
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The discharge of a large amount of gangue not only causes serious harm to ecological factors such as soil, air, and water bodies, but also occupies a large amount of land due to the long-term stockpiling of gangue, which leads to environmental degradation and seriously affects human health.
The gangue in the mining area is mostly piled up naturally, with a loose structure and poor stability. Therefore, if the slope of the gangue hill is too large or the accumulation is too high, it is considered that it is easy to cause collapse, landslide, mud-rock flow and other disasters during excavation or heavy rain erosion. Seriously endanger the ecological environment, and even cause great losses to people's lives and property

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The method that present embodiment utilizes coal gangue base flocculant to process coal slime water comprises the following steps:

[0024] Step 1: Crush the coal gangue and sieve it to obtain coal gangue powder with a particle size of less than 200 meshes, then weigh 2g of coal gangue powder and place it in a muffle furnace for 1.5 hours at 800°C, then rapidly cool at room temperature to obtain activated materials.

[0025] Step 2, add 20% dilute sulfuric acid to the activated material obtained in step 1, the liquid-solid ratio is 0.8mL:1g, and stir evenly.

[0026] Step 3: Put the mixture in step 2 into a muffle furnace for aging at 400° C. for 3 hours, and slowly cool it to 25° C. in the muffle furnace at 10° C. / min to obtain a gangue-based flocculant.

[0027] Step 4: Weigh 0.2g of coal gangue flocculant powder in step 3 and add it to a beaker containing 250 mL of coal slime water with a concentration of 50 g / L, stir for 5 min at a speed of 100 r / min, and transfer ...

Embodiment 2

[0030] The method that present embodiment utilizes coal gangue base flocculant to process coal slime water comprises the following steps:

[0031] Step 1: Crush the coal gangue and sieve it to obtain coal gangue powder with a particle size of less than 200 meshes, then weigh 2g of coal gangue powder and place it in a muffle furnace for roasting at 700°C for 2 hours, then rapidly cool it at room temperature to obtain an activated material .

[0032] Step 2, add 30% dilute sulfuric acid to the activated material obtained in step 1, the liquid-solid ratio is 1mL:1g, and stir evenly.

[0033] Step 3. Put the mixture in step 2 into a muffle furnace for aging at 500° C. for 2 hours, and slowly cool it to 25° C. in the muffle furnace at 15° C. / min to obtain a gangue-based flocculant.

[0034] Step 4: Weigh 0.5g of coal gangue flocculant powder in step 3 and add it to a beaker filled with 250 mL of coal slime water with a concentration of 30g / L, stir for 5 min at a speed of 200 r / min...

Embodiment 3

[0036] Embodiment 3: the present embodiment utilizes the method for coal gangue-based flocculant processing coal slime water to comprise the following steps:

[0037] Step 1: Crush the coal gangue and sieve it to obtain coal gangue powder with a particle size of less than 200 meshes, then weigh 2g of coal gangue powder and place it in a muffle furnace for roasting at 600°C for 3 hours, then rapidly cool it at room temperature to obtain an activated material .

[0038] Step 2, add 40% dilute sulfuric acid to the activated material obtained in step 1, the liquid-solid ratio is 1.2mL:1g, and stir evenly.

[0039] Step 3: Put the mixture in step 2 into a muffle furnace for aging at 550° C. for 1.5 h, then cool slowly to 25° C. at 20° C. / min in the muffle furnace to obtain a gangue-based flocculant.

[0040] Step 4: Weigh 0.2g of coal gangue flocculant powder in step 3 and add it to a beaker containing 250 mL of coal slime water with a concentration of 10g / L, stir for 5 min at a s...

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Abstract

The invention discloses a method for treating slime water by employing a coal gangue-based flocculant and belongs to the field of coal chemical industry. The method comprises the following steps of (1) crushing and sieving coal gangue, roasting in a muffle furnace and quickly cooling to obtain an activated material; (2) adding the coal gangue to dilute sulphuric acid, stirring evenly, and heating and curing the coal gangue in the muffle furnace to obtain the coal gangue-based flocculant; and (3) mixing the coal gangue-based flocculant and slime water for a period of time, standing and taking supernate to obtain treated slime water. The slime water is treated by using the coal gangue-based flocculant, clean production and comprehensive utilization of coal resources are achieved, the harm to the environment caused by the coal gangue is avoided to a great extent, local materials are adopted, wastes are changed into treasures, and the problem of high-mud slime water of a coal cleaning plant is difficult to treat is solved.

Description

technical field [0001] The invention relates to a method for treating coal slime water with a coal gangue-based flocculant, and belongs to the technical field of coal chemical industry. Background technique [0002] my country is a big country of coal production and consumption. However, with the development of society and the improvement of people's living standards and environmental protection awareness, the development model of mining enterprises that rely on a large number of mining resources to develop the economy is no longer in line with the country's energy policy and environmental protection policy. The waste gas, waste rock and waste water produced in the process of mining and coal washing make the resources continue to be wasted and the ecological environment is also greatly damaged. Therefore, how to rationally utilize mineral resources, reduce environmental pollution, reduce the economic cost of environmental pollution control, reduce dependence on traditional e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F103/10
CPCC02F1/5263C02F1/5236C02F2103/10C02F2209/06C02F2209/44
Inventor 杨志超刘生玉王伟张素红郭建英
Owner TAIYUAN UNIV OF TECH
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