Black glass production process

Abstract

The present invention discloses a black glass production process, and relates to the technical field of glass production and processing. The method is characterized in that the method comprises the following steps: (1): mixing, raw materials including quartz sand, limestone, sodium carbonate, basalt stone and tuff are mixed, black basalt stone accounts for 1-3% of the total weight of the raw materials, and black tuff accounts for 1.2-2.3% of the total weight of the raw materials; (2) melting: the mixed raw materials are heated in a melting furnace with a high temperature of 1550-1600 DEG C to form uniform liquid glass; (3) molding: the melted liquid glass is molded by a mold; and (4) heat treating: the molded liquid glass is performed with annealing and quenching process to eliminate or produce internal stress, phase separation or crystallization of the glass, and to change the glass structure and state. The black glass is environmentally friendly and healthy, and the produced black glass is low in brittleness and stronger in wear resistance and pressure resistance so that the black glass is not prone to splintering.

Description

Technical field: [0001] The invention relates to the technical field of glass production and processing, in particular to a black glass production process. Background technique: [0002] Glass is a transparent solid at room temperature. It forms a continuous network structure when it melts. It is a silicate non-metallic material that gradually increases in viscosity and hardens during cooling. The chemical composition of ordinary glass is Na 2 O CaO 6SiO 2 , the main component is silicon dioxide. Widely used in buildings, used for wind and light transmission, belongs to the mixture. There are also colored glass that is mixed with certain metal oxides or salts to show color, and tempered glass made by a special method. [0003] The production of black glass raw materials in the prior art generally adds a lot of colorants, and the content of colorants exceeds 30% of the glass weight. Such glass is very brittle and easily broken, and a large amount of heavy metals are also ...

AI Technical Summary

Problems solved by technology

[0003] The production of black glass raw materials in the prior art generally adds a lot of colorants, and the content of colorants exceeds 30% of the glass weight. Such glass is very brittle and easily broken, and a large amount of heavy metals are also added to the glass raw materials. We know that heavy metals are toxic to a certain extent, which is not environmentally friendly and healthy