Preparation method of low-cost glass ceramic

Abstract

The invention provides a preparation method of low-cost glass ceramic. Copper slag and high-temperature molten converter slag are mixed, molten reduction tailings generated after iron is reduced and recovered and zinc-containing dust serve as base materials of the low-cost glass ceramic, and a one-step heat treatment process is carried out to prepare the low-cost glass ceramic. The process can be arranged near a high-temperature converter, the solid copper slag and the reducing agent are poured into the liquid converter slag after deslagging and are heated to be completely molten, glass ceramic is prepared from generated secondary tailings, and iron in the glass ceramic is recycled. According to the method, waste of the recovery process can be completely utilized, the economic additional value of the waste is improved, solid waste is reduced, the effect of protecting the environment is achieved, and the purpose of efficiently utilizing the waste heat of the molten converter slag is achieved; and meanwhile, the technological process is simplified. The secondary tailings obtained after reduction of the copper slag and the molten converter slag are used as the base material of the glass ceramic, the preparation cost is low, the price advantage is great, the economic benefit is good, the performance of the prepared glass ceramic is superior to that of natural stone, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of glass-ceramics preparation, in particular to a method for preparing low-cost glass-ceramics. Background technique [0002] Glass-ceramic refers to the basic glass with a specific composition with or without a crystal nucleating agent. After heat treatment under a certain temperature system, a large number of tiny crystals are uniformly precipitated in the glass to form a dense microcrystalline phase and glass. multiphase complexes. By controlling the type, quantity and size of crystallites, transparent glass-ceramics, glass-ceramics with low expansion coefficient, surface-strengthened glass-ceramics, glass-ceramics of different colors or machinable glass-ceramics can be obtained. As an inorganic non-metallic material, glass-ceramic is a new type of building material, which has the dual characteristics of glass and ceramics. The arrangement of atoms inside ordinary glass is irregular, which is one of the...

AI Technical Summary

Problems solved by technology

Commonly used additives are Na 2 O, BaO or SrO, etc., but Na 2 O has adverse effects on the crystallization, internal structure and performance of glass-ceramics. When BaO is added too much, it will make it difficult to clarify the glass liquid, and the amount of crystallization will increase, and the crystals will grow too much, which will affect the structural stability of crystal glass. The addition of SrO will increase the high-temperature viscosity of the molten glass, making the water quenching process difficult to operate

[0004] Copper slag is a by-product of the copper smelting process. The output is huge, but the metal resources are abundant and have a high recovery value. However, a large amount of secondary tailings will be generated in the recycling process; the main utilization methods of these secondary tailings It is mostly used for the production of cement or roadbed materials, and the added value of these utilization methods is low

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