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Method for directly preparing ferro-magnetic microcrystal glass by thermal state steel slag

A technology for glass-ceramic and hot steel slag, which is applied in the fields of comprehensive utilization of resources and material science, can solve the problems of glass-ceramics that have not been reported, avoid material consumption and waste generation, fast homogenization, and melting time. short effect

Inactive Publication Date: 2012-12-19
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technology of using hot slag to prepare glass ceramics has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0040] Using cullet as raw material, heat cullet at 1400-1450°C for 2-4 hours to melt it into cullet melt; mix and homogenize with hot steel slag under inert or reducing atmosphere. The homogeneous melt was casted and annealed at 550 °C for 2 hours to obtain the basic glass.

[0041] After the basic glass is crystallized and heat-treated at 950-1050 ℃, glass-ceramics with strong magnetic properties can be obtained.

[0042] The mass ratios of cullet to hot steel slag are 1:1.5, 1:2.5, and 1:3, respectively. The chemical compositions of raw materials and products are shown in Table-1, Table-2 and Table-3 respectively.

[0043] Table-1 Chemical composition of auxiliary materials and products (mass ratio of steel slag to waste glass is 1:1.5)

[0044] components SiO 2 Al 2 o 3 Fe T CaO MgO K 2 o Na 2 o steel slag 11.37 2.67 30.75 38.25 10.56 waste glass 71.02 0.94 0.27 8.64 4.25 0.3 13.51 Glass-ceramic 47.16 1.63...

Embodiment 4

[0050] Take 81.23g of auxiliary materials to make powder and mix evenly, heat at 1400-1450°C for 2-4 hours to melt it into auxiliary material melt;

[0051] The ratio of auxiliary materials is: SiO2 49.59g, CaO 8.67g, Al 2 o 3 15.7g, MgO 4.95g, Na 2 O 2.32g;

[0052] Take 18.68g of hot steel slag, pour it into the auxiliary material melt and mix it uniformly, cast it into a preheated mold for molding, anneal, cool to room temperature, and make the basic glass.

[0053] After the basic glass is crystallized and heat-treated at 950-1050 ℃, glass-ceramics with strong magnetic properties can be obtained.

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Abstract

The invention discloses a method for directly preparing ferro-magnetic microcrystal glass by thermal state steel slag, comprising the steps of founding base glass by steel slag and preparing ferro-magnetic microcrystal glass by thermal treatment. The method comprises the following steps of: firstly, milling and evenly mixing auxiliary material components, heating the mixture for 2-4h at the temperature of 1400-1450DEG C, melting into liquid, pouring thermal state steel slag into an auxiliary material melt and evenly mixing, casting in a mold to be formed, annealing, and cooling to room temperature, so that a base glass blank can be formed; and carrying out the nucleating and crystallizing thermal treatment on the glass blank, preserving heat preservation after the crystallization temperature is higher than 950DEG C and then cooling down, so that the magnetic microcrystal glass where the diopside and the ferrite are taken as a main crystalline phase can be obtained. Due to a preparation method of the ferro-magnetic microcrystal glass provided by the invention, a mass of sensible heat in the thermal state steel slag can be sufficiently used, the environment pollution can be avoided, and the iron in the slag can be effectively used. The prepared microcrystal glass is good in magnetic thermal property and biological activity, and is high in product additional value.

Description

[0001] technical field [0002] The invention relates to a method for directly preparing ferromagnetic glass-ceramics from hot steel slag, and belongs to the fields of resource comprehensive utilization and material science and technology. Background technique [0003] Hot steel slag has a higher temperature (about 1500°C), more heat energy (1758kJ / kg) and a large amount of iron (10-30 wt%). The traditional treatment process is to use the action of cooling medium and hot steel slag to quench and crush it, and obtain slag particles after cooling. The process of obtaining cold steel slag will consume sensible heat in hot steel slag, consume water and other substances, and cause environmental pollution. The use of cold steel slag is usually to recover the iron and other metals in it first, and then use it in agricultural fertilizers, cementitious materials, roadbed materials, building materials and glass-ceramic raw materials. [0004] Glass-ceramic is a new type of composite...

Claims

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Application Information

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IPC IPC(8): C03C10/02
Inventor 张凯武文斐李保卫
Owner INNER MONGOLIA UNIV OF SCI & TECH
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