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A kind of cas series iron tailings glass-ceramic material and preparation method and application thereof

A technology of glass-ceramics and iron tailings, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve problems such as difficult operation, no attention to whether the leachability of heavy metals is in compliance, complex heat treatment system, etc., to achieve leaching The effect of reducing the toxicity, achieving harmless and resourceful utilization, and good application prospects

Active Publication Date: 2022-08-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat treatment system of this method is complicated and needs to go through a water quenching process, which is not easy to operate
At present, there are few methods for preparing CAS-based glass-ceramic materials from iron tailings, and these methods do not pay attention to whether the leachability of heavy metals in the prepared products meets the national standard requirements

Method used

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  • A kind of cas series iron tailings glass-ceramic material and preparation method and application thereof
  • A kind of cas series iron tailings glass-ceramic material and preparation method and application thereof
  • A kind of cas series iron tailings glass-ceramic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of the CAS series iron tailings glass-ceramic material comprises the following steps:

[0041] 1. After drying the iron tailings in an oven at 105°C, grind and sieve them with a ceramic mortar to obtain iron tailings powder with a particle size of less than 200 μm for later use;

[0042]2. Mix the iron tailing powder with a mass ratio of 10:33:38:19 with alumina, silica and calcium oxide ball milling;

[0043] 3. At room temperature, the mixed powder is pressed into a sheet with a diameter of 30mm and a thickness of 4mm, the pressure is 20MPa, and the pressing time is 2min to ensure that the powders are tightly combined, which is conducive to the heat treatment reaction;

[0044] 4. Put the obtained sheet in an alumina crucible, then put the crucible into a high-temperature resistance furnace for high-temperature sintering, heat up to 1460°C for sintering at a heating rate of 5°C / min, and then keep at 1460°C for 2 hours;

[0045] 5. After the alu...

Embodiment 2

[0047] The difference from Example 1 is that the mass ratio of iron tailing powder, alumina, silicon oxide and calcium oxide described in step 2 is 14:28:32:16, and the obtained CAS series iron tailings glass-ceramic material is marked with for sample 2.

Embodiment 3

[0049] The difference from Example 1 is that the mass ratio of iron tailings powder, alumina, silicon oxide and calcium oxide described in step 2 is 30:26:29:15, and the obtained CAS series iron tailings glass-ceramic material is marked as Sample 3.

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Abstract

The invention belongs to the field of harmless and comprehensive utilization of iron tailings, and discloses a CAS series iron tailings glass-ceramic material and a preparation method and application thereof. For the glass-ceramic material, iron tailings powder is ball-milled and mixed with alumina, silica and calcium oxide powders, and then the mixed powder is pressed into flakes; the flakes are sintered at 960-1460° C. and naturally cooled to room temperature. be made of. The present invention is implemented through different ratios of raw materials, and an iron tailings glass-ceramic material with excellent water absorption, elastic modulus, acid and alkali resistance is obtained, the water absorption is 0.3%, and the elastic modulus is 733.6 MPa. The acid resistance is 0.12%, and the alkali resistance is 0.01%, meeting the national standard requirements. The method of the invention is simple, easy to produce on a large scale, realizes the harmless and resourceful utilization of tailings, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of harmless and comprehensive utilization of solid waste tailings, and more particularly relates to a CAS series iron tailings glass-ceramic material and a preparation method and application thereof. Background technique [0002] Tailings are solid wastes produced in the process of beneficiation. The content of tailings discharged every year in my country is as high as 500 million tons, of which iron tailings are 150 million tons. However, the comprehensive utilization rate of tailings is low, less than 10%. Therefore, the treatment and reuse of tailings is an issue that should be widely concerned in our country at present. For a long time, tailings treatment and disposal mainly adopts the method of open-air stacking, which occupies a large amount of land and causes air pollution. In addition, the chemical elements in iron tailings are very complex, and they are eroded during the open-air stacking process,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/06C03C4/20C03B19/06C03C6/04
CPCC03C10/0063C03C10/0036C03C4/20C03B19/06C03C1/002
Inventor 路星雯刘雨昕宁寻安王玉洁
Owner GUANGDONG UNIV OF TECH
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