CAS iron tailing microcrystalline glass material as well as 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 the problems of complex heat treatment system, no attention to the compliance of heavy metal leachability, difficult operation, etc., and achieve good application Prospects, realization of harmless and resourceful utilization, effect of reducing leachability

Active Publication Date: 2020-07-31
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • CAS iron tailing microcrystalline glass material as well as preparation method and application thereof
  • CAS iron tailing microcrystalline glass material as well as preparation method and application thereof
  • CAS iron tailing microcrystalline glass material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of the CAS 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 use;

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

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

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

[0045] 5. After the alumi...

Embodiment 2

[0047] The difference from Example 1 is that the mass ratio of iron tailings powder, alumina, silicon oxide and calcium oxide in step 2 is 14:28:32:16, and the obtained CAS iron tailings glass-ceramic material is marked 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 in step 2 is 30:26:29:15, and the obtained CAS 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 iron tailing microcrystalline glass material as well as a preparation method and application thereof. The microcrystalline glass material is prepared by the following steps: ball-milling and mixing iron tailing powder with alumina, silicon oxide and calcium oxide powder, then pressingthe mixed powder into sheets; and sintering the sheets at 960-1460 DEG C, and naturally cooling the sheets to the room temperature. The iron tailing microcrystalline glass material with an excellentwater absorption rate, elasticity modulus, acid resistance and alkali resistance is obtained by mixing raw materials according to a certain ratio, the water absorption rate is 0.3%, the elasticity modulus is 733.6 MPa, the acid resistance is 0.12%, and the alkali resistance is 0.01%, and the iron tailing microcrystalline glass material meets the national standards. The method is simple, large-scale production is easy, harmlessness and resource utilization of tailings are achieved, and the glass material has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of harmless treatment and comprehensive utilization of solid waste tailings, and more specifically relates to a CAS-based iron tailings glass-ceramic material and its preparation method and application. Background technique [0002] Tailings are solid wastes produced during the beneficiation process. The content of tailings discharged in my country is as high as 500 million tons per year, of which 150 million tons of iron tailings are discharged. But the comprehensive utilization rate of tailings is low, less than 10%. Therefore, the treatment and reuse of tailings is a problem that should be widely concerned in our country at present. For a long time, tailings have been treated and disposed of mainly by open stacking, which takes up a lot of land and pollutes the air. Moreover, the chemical elements in iron tailings are very complex, and they are eroded during the open-air stacking process, and some metal...

Claims

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Application Information

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Patent Type & Authority Applications(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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