Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing adsorbing material for water treatment by taking coal gangue as raw material

An adsorption material, coal gangue technology, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as environmental hazards and achieve the effect of simple process

Inactive Publication Date: 2021-01-22
HENAN POLYTECHNIC UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some studies use chemical treatment of coal gangue to prepare aluminum chloride as a water treatment agent. The preparation process uses strong acid and strong alkali for leaching treatment, which causes certain environmental hazards and produces a large amount of leaching residues.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing adsorbing material for water treatment by taking coal gangue as raw material
  • Method for preparing adsorbing material for water treatment by taking coal gangue as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A1, coal gangue powder preparation: use a jaw crusher to crush the coal gangue to an average particle size of 5 mm, and then use a ball mill to process the coal gangue powder with a particle size of less than 45 microns;

[0020] A2. Calcination decarbonization and activation treatment: The coal gangue powder obtained in A1 is calcined at a high temperature of 600° C. for 2 hours, and the calcined decarbonization activated coal gangue powder is obtained through natural cooling;

[0021] A3. Mix the calcined coal gangue powder obtained in A2 with water to make pulp, and the mass ratio of the calcined coal gangue powder to water is 1:4; then stir and react in the reactor at 180°C for 48 hours, and use centrifugation after cooling machine for solid-liquid separation, then drying and grinding, and finally obtain the coal gangue adsorption material for water treatment.

Embodiment 2

[0023] A1. Coal gangue powder preparation: use a jaw hammer crusher to crush the coal gangue to a median particle size of 5 mm, and then use a ring roller mill to obtain a coal gangue powder with a particle size of less than 72 microns;

[0024] A2. Calcination for carbon removal and activation treatment: calcining the coal gangue powder obtained in A1 at a high temperature of 700° C. for a holding time of 2 hours, and then naturally cooling down to obtain calcined coal gangue powder;

[0025] A3. Mix the calcined coal gangue powder obtained in A2 with water to make pulp, the mass ratio of the calcined coal gangue powder to water is 1:6; then stir and react in a pressure reactor at 200°C for 12 hours, and use it after cooling A centrifuge is used for solid-liquid separation, followed by drying and grinding, and finally the coal gangue adsorption material for water treatment is obtained.

Embodiment 3

[0027] A1, coal gangue powder preparation: use a jaw crusher to crush the coal gangue to an average particle size of 5 mm, and then use a ball mill to obtain a coal gangue powder with an average particle size of less than 45 microns;

[0028] A2. Calcination and activation treatment: calcining the coal gangue powder obtained in A1 at a high temperature of 550° C. for a holding time of 2 hours, and then naturally cooling down to obtain calcined coal gangue;

[0029] A3. Mix the calcined coal gangue powder obtained in A2 with water to make pulp, and the mass ratio of the calcined coal gangue to water is 1:10; then stir and react in a pressure reactor at 220°C for 16 hours, and use centrifugation after cooling Machine for solid-liquid separation, and then drying, grinding, and finally made of coal gangue adsorption material.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

A method for preparing an adsorbing material for water treatment by taking coal gangue as a raw material is characterized by comprising the following steps: A1, coal gangue micronization treatment: crushing blocky coal gangue into coal gangue powder with the particle size of less than 45 microns by adopting mechanical crushing; A2, calcining carbon removal and activation treatment: calcining the coal gangue powder obtained in the step A1 at a high temperature of 500800 DEG C, keeping the temperature for 60180 minutes, and naturally cooling to obtain calcined coal gangue powder; A3, mixing thecalcined coal gangue powder obtained in the step A2 with water to prepare slurry, wherein the mass ratio of the calcined coal gangue powder to the water is 1: (3-10); then performing stirring and reacting for 12-48 hours in a pressure reaction kettle at 180-250 DEG C, cooling, then carrying out solid-liquid separation by adopting a centrifugal machine, and then performing drying and grinding to finally obtain the coal gangue adsorbing material for water treatment.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization and material preparation, in particular to a method for preparing an adsorption material for water treatment using coal gangue as a raw material. Background technique [0002] Coal gangue is solid waste in the coal washing process, and its main components are silicate minerals and a small amount of coal. At present, the resource utilization of coal gangue mainly includes coal gangue for power generation, but only coal gangue with high calorific value can be used, and a large amount of waste residue needs to be further processed; coal gangue is used as a building auxiliary material for paving, cement admixture, and brick making etc., but with low added value and high transportation costs, they can only be used nearby. In some methods, for some minerals whose content reaches a certain grade, gravity separation and flotation are used to extract kaolinite and pyrite. Some st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J20/10B01J20/28C02F1/28C02F101/30C02F101/20
CPCB01J20/10B01J20/28021C02F1/281C02F2101/308C02F2101/20
Inventor 张乾张玉德陈子益殷帅军康雅敏赵晓磊冯兆祥
Owner HENAN POLYTECHNIC UNIV