Method for directly utilizing liquid-state blast furnace slag to manufacture glass ceramics

Abstract

The invention discloses a method for directly utilizing liquid-state blast furnace slag to manufacture glass ceramics. The method comprises the following concrete steps: 1) respectively adding liquid-state blast furnace slag and molten-state SiO2 at a certain mass ratio into a burdening kiln, and evenly mixing; 2) transferring the burdened mixture from the burdening kiln to a heat treating kiln, and carrying out heat treating in the heat treating kiln; and 3) annealing the material obtained by the step 2) to room temperature, thereby obtaining the glass ceramics. The invention directly utilizes the liquid-state blast furnace slag to manufacture the glass ceramics, thereby effectively utilizing the sensible heat of the blast furnace slag, greatly reducing the energy consumption and the production cost, improving the utilization rate of the blast furnace slag to 90% and shortening the production cycle.

Description

technical field [0001] The invention relates to a method for producing glass-ceramic from liquid blast furnace slag. The method utilizes the liquid blast-furnace slag produced in the blast furnace ironmaking process to directly produce low-cost glass-ceramic, which can be used as a decorative material in the construction industry and other industries. . Background technique [0002] Blast furnace slag is a solid waste discharged during the blast furnace ironmaking process, with a huge amount of discharge and rich sensible heat energy. At present, 90% of blast furnace slag in my country is treated with water quenching method. This method not only makes all the heat loss of liquid blast furnace slag, but also wastes the water resources of slag flushing. At the same time, the slag flushing wastewater contains a lot of harmful substances. It is quite difficult to deal with and needs to invest a lot of money, otherwise it will cause serious pollution to the environment. In my co...

AI Technical Summary

Problems solved by technology

In industrial production, due to the huge amount of cold materials, the energy consumption in the high-temperature melting, grinding and heat treatment processes is extremely high, resulting in high production costs of slag glass-ceramic

[0011] The above process only uses the blast furnace slag as a raw material after cooling, and does not use its own sensible heat as an energy source, nor does it solve the serious waste of energy and water resources in the current blast furnace slag treatment.

At the same time, there is also a common problem: on the basis of blast furnace slag as the base material, a relatively high proportion of chemical reagents is added to the formula, which leads to high raw material costs of slag glass-ceramics and makes the product lack of market competitiveness.

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