Method for manufacturing light ceramisite through high-sulfur coal gangue tailings

A technology of high-sulfur coal gangue and light ceramsite, applied in chemical instruments and methods, wet separation, sustainable waste treatment, etc., can solve the problems of low utilization rate of high-sulfur coal gangue and steel slag, secondary pollution, etc. Achieve the effect of increasing plasticity and increasing value-added space

Inactive Publication Date: 2017-08-22
绵阳耀邦环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the utilization rate of existing high-sulfur coal gangue and steel slag is low, and it is easy to cause secondary pollution. T

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First prepare the kaolinite tailings in the sorting of high-sulfur coal gangue:

[0030] Step (1), ore grinding: first crush the high-sulfur coal gangue with a pulverizer, and grind it with a ball mill to obtain coal gangue particles, the particle diameter of the coal gangue particles is 140 mesh to 170 mesh;

[0031] Step (2), mixing slurry: adding water to the gangue particles and preparing slurry in the adjustment tank, the mass concentration of the slurry is 18%, and the slurry is stirred for 12 minutes;

[0032] Step (3), cyclone separation: the ore slurry is separated through a hydrocyclone, the cone angle of the hydrocyclone is 16°, the cone ratio is 0.50, the cyclone separation pressure is 0.16MPa, and the hydrocyclone The separation time is 3 to 5 minutes;

[0033] Step (4), pulp preparation: the upper layer of wood obtained by separating the cyclone separator can be further sorted to obtain coal slime, and the lower layer of material is prepared in the adjust...

Embodiment 2

[0036] The invention provides a method for making lightweight ceramsite by using high-sulfur coal gangue tailings, the specific steps are:

[0037] Step 1, weighing raw materials by weight, wherein 45 parts of kaolinite tailings, 30 parts of steel slag, 8 parts of coal slime;

[0038] Step 2, ball milling and mixing the raw materials to obtain a mixed material with a particle size of 230 meshes after the ball milling and mixing;

[0039] Step 3, adding 15 parts of water to the mixed material, and then adopting a ball forming disc to carry out ball processing to obtain a ball material, the diameter of the ball material is 8mm;

[0040] Step 4, preheating the pellets at 280°C for 3 to 8 minutes; then continuing to heat up to 550°C for 10 to 15 minutes;

[0041] Step 5, performing high-temperature sintering treatment on the preheated pellets, the sintering temperature is 1200°C, the sintering time is 20min, and the lightweight ceramsite is obtained after cooling;

[0042] Where...

Embodiment 3

[0044] The invention provides a method for making lightweight ceramsite by using high-sulfur coal gangue tailings, the specific steps are:

[0045] Step 1, weighing raw materials by weight, wherein 50 parts of kaolinite tailings, 25 parts of steel slag, 10 parts of coal slime;

[0046] Step 2, ball milling and mixing the raw materials to obtain a mixed material with a particle size of 230 meshes after the ball milling and mixing;

[0047] Step 3, adding 18 parts of water to the mixed material, and then adopting a ball forming disc to carry out ball processing to obtain a ball material, the diameter of the ball material is 9mm;

[0048] Step 4, first preheating the pellets at 300°C for 3-8 minutes; then continuing to heat up to 600°C for 10-15 minutes;

[0049] Step 5, subjecting the ball material after the preheating treatment to high-temperature sintering treatment, the sintering temperature is 12400°C, the sintering time is 25min, and the lightweight ceramsite is obtained a...

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Abstract

The invention discloses a method for manufacturing light ceramisite through high-sulfur coal gangue tailings. The method comprise the following steps of step 1 of weighing raw materials according to parts by weight: 45 to 65 parts of kaolinite tailings, 20 to 30 parts of steel slag and 5 to 10 parts of coal slime; step 2 of ball milling and evenly mixing the raw materials to obtain a mixed material which has a particle size of 230 to 270 meshes; the step 3 of adding 15 to 20 parts of water into the mixed material, then utilizing a disc granulator to perform balling treatment to obtain a ball material, wherein the diameter of the ball material is 8 to 10mm; step 4 of preheating the ball material; step 5 of sintering the preheated ball material at high temperature and cooling to obtain the light ceramisite; the kaolinite tailings are high-sulfur coal gangue obtained through hydrocyclone separation and floatation. The method disclosed by the invention improves resource utilization of the high-sulfur coal gangue and the steel slag, further is simple in processing technology, reduces environmental pollution and meanwhile greatly improves added value space of the high-sulfur coal gangue and the steel slag.

Description

technical field [0001] The invention relates to a coal gangue utilization method, in particular to a method for preparing lightweight ceramsite by using high-sulfur coal gangue tailings. Background technique [0002] High-sulfur coal gangue is black waste rock with low carbon content discharged during the coal mining process. It is a harmful solid waste. Its discharge and accumulation not only occupy a large amount of cultivated land, but also cause great pollution to the surface and the atmosphere. The chemical composition of coal gangue is similar to that of clay, and coal gangue contains relatively high carbon and sulfur, and the loss on ignition is relatively large. Only in a certain temperature range can a sufficient amount of molten material with suitable viscosity be produced and have expansion properties. According to its characteristics, my country has developed gangue ceramsite. [0003] The existing steel slag is basically pulled to the garbage pile after simple...

Claims

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Application Information

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IPC IPC(8): C04B18/02C04B18/12C04B20/02B03B7/00
CPCB03B7/00C04B18/027C04B20/02C04B18/023C04B18/12C04B18/142Y02W30/91
Inventor 谢秩勇
Owner 绵阳耀邦环保科技有限公司
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