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A kind of chemical preparation method of active coal gangue

A chemical method and technology of coal gangue, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of high energy consumption, poor comprehensive activation effect, strict raw material requirements, etc., and achieve non-corrosiveness. , easy to deploy production, broaden the effect of the application field

Active Publication Date: 2019-04-30
山西省生态环境研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, provide a chemical preparation method for activated coal gangue, and solve the shortcomings of the existing coal gangue activation technology in terms of high energy consumption, strict raw material requirements, and poor comprehensive activation effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The chemical preparation method of active coal gangue in the present embodiment, it is made up of following steps:

[0013] 1) Coal gangue pretreatment: Use physical or chemical methods to decarbonize and desulfurize coal gangue in sequence so that the loss on ignition ≤ 8%, SO 3 Content ≤ 3.5%, 80μm square hole sieve residue ≤ 10%, the physical or chemical methods include but not limited to jigging treatment, chute treatment, shaker treatment and flotation treatment;

[0014] 2) Preparation of activator: take 0.2518% naphthalene series, 0.013% melamine, 0.0145% sodium silicate, 0.2493% mineral powder and mix them evenly, and prepare them into an activator aqueous solution with a concentration of 0.3%;

[0015] 3) Spray the prepared activator aqueous solution evenly into the coal gangue powder with a mass fraction of 99.4714% within 5 minutes, stir for 2 hours with a mixer at a speed of 30 r / min, and stand still for 24 hours after stirring to obtain active gangue.

Embodiment 2

[0017] The chemical preparation method of active coal gangue in the present embodiment, it is made up of following steps:

[0018] 1) Coal gangue pretreatment: Use physical or chemical methods to decarbonize and desulfurize coal gangue in sequence so that the loss on ignition ≤ 8%, SO 3 Content ≤ 3.5%, 80μm square hole sieve residue ≤ 10%, the physical or chemical methods include but not limited to jigging treatment, chute treatment, shaker treatment and flotation treatment;

[0019] 2) Preparation of activator: take 0.1987% naphthalene series, 0.0102% melamine, 0.0095% sodium silicate, 0.2225% mineral powder and mix them evenly, and prepare them into an activator aqueous solution with a concentration of 0.8%;

[0020] 3) Spray the prepared activator aqueous solution evenly into the coal gangue powder with a mass fraction of 99.5591% within 5 minutes, stir for 4 hours with a mixer at a speed of 60 r / min, and stand still for 48 hours after stirring to obtain active gangue.

Embodiment 3

[0022] The chemical preparation method of active coal gangue in the present embodiment, it is made up of following steps:

[0023] 1) Coal gangue pretreatment: Use physical or chemical methods to decarbonize and desulfurize coal gangue in sequence so that the loss on ignition ≤ 8%, SO 3 Content ≤ 3.5%, 80μm square hole sieve residue ≤ 10%, the physical or chemical methods include but not limited to jigging treatment, chute treatment, shaker treatment and flotation treatment;

[0024] 2) Preparation of activator: take 0.2353% naphthalene series, 0.013% melamine, 0.0145% sodium silicate, and 0.2658% mineral powder, mix them evenly, and prepare them into an activator aqueous solution with a concentration of 0.5%;

[0025] 3) Spray the prepared activator aqueous solution evenly into the coal gangue powder with a mass fraction of 99.4714% within 5 minutes, stir for 2.5 hours with a mixer at a speed of 40r / min, and stand still for 30 hours after stirring to obtain active gangue . ...

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Abstract

The invention provides a chemical preparation method of active coal gangue, belongs to the technical field of recycling of coal gangue and solves the problems of high energy consumption, strict raw material requirement, poor comprehensive activation effect and the like of an existing coal gangue activation technology. According to the solution, the chemical preparation method comprises steps as follows: 1), the coal gangue is pretreated; 2), an activating agent is prepared; 3), a prepared activating agent aqueous solution is uniformly sprayed to coal gangue powder, the materials are stirred and left to stand, and then the active coal gangue is prepared. Compared with the prior art, the chemical preparation method has a lower requirement for raw material components of the coal gangue, so that energy consumption can be greatly reduced, and environmental pollution in a calcining process is basically eliminated; the selected activating agent is non-corrosive and easy to prepare and produce; a requirement for carbon content of the coal gangue is relatively low in a chemical activating process, thus, not only can the pretreated coal gangue meeting the requirement be treated, but also the coal gangue raw materials meeting the requirement can be directly treated, and the chemical preparation method of the active coal gangue has practical value for expanding the application field of the raw materials of the coal gangue.

Description

technical field [0001] The invention belongs to the technical field of coal gangue reuse, in particular to a chemical preparation method of active coal gangue. Background technique [0002] With the rapid and rapid development of the world economy, all walks of life have an increasing demand for energy, and coal, as a solid fuel with huge reserves in the world, has always been favored by people and has become an indispensable part of daily life and production. Energy-supplying substances. However, with the large-scale mining of coal, solid waste represented by coal gangue is continuously mined out. Due to its low carbon content and a large amount of clay minerals, it is not easy to be used as an energy supply material. Therefore, a large amount of random stacking not only occupies a large amount of land and farmland on the one hand, but on the other hand, a large amount of coal gangue piled up often spontaneously ignites, producing toxic gases and a large amount of dust. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/12C04B20/02
CPCC04B18/12C04B20/02C04B20/023Y02W30/91
Inventor 赵亮李超高成伟袁进
Owner 山西省生态环境研究中心
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