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Method for directly preparing glass-ceramic by using hot steel slag

A technology of glass ceramics and slag, which is applied in the field of building decoration materials, can solve the problems of reduced utilization efficiency, achieve the effects of alleviating a large amount of waste, simple production process, and easy operation

Inactive Publication Date: 2017-11-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, almost all the utilization of iron and steel slag is in the form of cold slag, and the sensible heat in the second iron and steel slag is indirectly utilized in the form of steam, and the utilization efficiency is greatly reduced

Method used

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  • Method for directly preparing glass-ceramic by using hot steel slag

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Effect test

example 1

[0029] The preparation method of directly using hot-melt steel slag glass ceramics is as follows:

[0030] a. Use a certain amount of auxiliary materials: quartz sand, aluminum stone powder, soda ash, barium carbonate, and titanium oxide are added to the steel slag. The mass ratio of these auxiliary materials to the steel slag is 35:100; the applicable chemical composition of the steel slag Range: SiO 2 (20wt%wt%), Al 2 o 3 (8wt%), CaO (55wt%), MgO (7wt%), Fe 2 o 3 (10wt%); the specific addition amount of auxiliary materials needs to refer to the composition of steel slag in actual production. It is necessary to ensure that the chemical composition of the molten glass after mixing is within the following range: SiO 2 (55wt%), Al 2 o 3 (8wt%), CaO (16wt%), MgO (1wt%), BaO (8wt%), Na 2 O (6wt%), Fe 2 o 3 (5wt%), TiO 2 (1 wt%).

[0031] b. Transport the steel slag with a certain quality in liquid state through the steel slag transport tank 1 to the front transition po...

example 2

[0036] a. Use a certain amount of auxiliary materials: quartz sand, aluminum stone powder, soda ash, barium carbonate, and titanium oxide are added to the steel slag. The mass ratio of these auxiliary materials to the steel slag is: 48:100; the applicable chemical composition of the steel slag Range: SiO 2 (23wt%), Al 2 o 3 (6wt%), CaO (52wt%), MgO (7wt%), Fe 2 o 3 (5wt%); the specific addition amount of auxiliary materials needs to refer to the composition of steel slag in actual production. It is necessary to ensure that the chemical composition of the molten glass after mixing is within the following range: SiO 2 (58wt%), Al 2 o 3 (5wt%8), CaO (20wt%), MgO (2wt%), BaO (6wt%), Na 2 O (4wt%), Fe 2 o 3 (4wt%), TiO 2 (1 wt%).

[0037] b. Transport the steel slag with a certain quality in liquid state through the steel slag transport tank 1 to the front transition pool 3 of the steel slag melting furnace and throw it into the glass kiln feeding port through the refrac...

example 3

[0042] a. Use a certain amount of auxiliary materials: quartz sand, aluminum stone powder, soda ash, barium carbonate, and titanium oxide are added to the steel slag. The mass ratio of these auxiliary materials to the steel slag is: 58:100; the applicable chemical composition of the steel slag Range: SiO 2 (25wt%), Al 2 o 3 (2wt%), CaO (48wt%), MgO (7wt%), Fe 2 o 3 (5wt%-); the specific addition amount of auxiliary materials needs to refer to the composition of steel slag in actual production. It is necessary to ensure that the chemical composition of the molten glass after mixing is within the following range: SiO 2 (60wt%), Al 2 o 3 (5wt%), CaO (21wt%), MgO (1wt%), BaO (5wt%), Na 2 O (3wt%), Fe 2 o 3 (4wt%), TiO 2 (1 wt%).

[0043] b. Transport the steel slag with a certain quality in liquid state through the steel slag transport tank 1 to the front transition pool 3 of the steel slag melting furnace and throw it into the glass kiln feeding port through the refrac...

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Abstract

The invention discloses a method for directly preparing glass-ceramics by using hot steel slag. The liquid steel slag and auxiliary materials are mixed at the feeding port and enter the melting part of the glass melting furnace through a roller feeder; Supplement heat from the device to keep the melting temperature at 1480-1560°C and keep it warm for 10 hours; microwave homogenize the glass melt in the melting part of the glass melting furnace; melt, clarify and homogenize the glass melt for glass forming; pass through the annealing furnace Anneal and lower the temperature to 10-50°C below the Tg temperature of the glass to obtain a glass panel; heat the cooled glass panel directly in a roller kiln for nucleation and crystallization heat treatment, and cut it to obtain glass ceramics after cooling. In the present invention, hot steel slag is used to directly prepare glass-ceramics, and the heat energy brought by the high temperature of liquid steel slag is fully utilized. In production, only the heat energy for heating the additional raw materials to melting is required, which greatly reduces the energy consumption.

Description

technical field [0001] The invention belongs to the field of building decoration materials, and in particular relates to a method for preparing glass-ceramics by using steel slag. Background technique [0002] Steel slag is a by-product of the steelmaking process. In the process of steelmaking, oxygen or air is used to oxidize various elements in the protective material (mainly pig iron), such as manganese, iron, phosphorus, silicon, and at the same time in a high temperature environment, it is combined with a solvent (mainly refers to limestone) A slag formed by the reaction. As the world's largest steel producer, my country produces a large amount of steel slag every year. These waste steel slags pose a serious threat to our country's environment. In response to this situation, a lot of research has been done on the recycling of steel slag in China, and it is mainly used in the construction material industry. Its utilization methods include the following: cement raw mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C6/10C03C10/00
Inventor 何峰谢峻林叶楚桥
Owner WUHAN UNIV OF TECH
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