Glass refining agent, production method and application

Abstract

The invention discloses a glass refining agent for forming an echelon refining effect in glass melt so as to eliminate bubbles in melted glass liquid, a production method of the glass refining agent and application of the glass refining agent to glass production. The glass refining agent comprises one or a combination of an oxide refining agent, an alkaline-earth metal salt refining agent and a halide refining agent, and is characterized in that the glass refining agent is prepared by raw material via procedures of distribution, ball milling, sieving, spray granulation and mixing, and comprises three particle groups with different specific surface areas, the first particle group accounts for 20%-30% by weight, the grain size of the first particle group is larger than 1.5mm and smaller than or equal to 2.0mm, the second particle group accounts for 40%-50% by weight, the grain size of the second particle group is larger than 0.5mm and smaller than or equal to 1.5mm, the third particle group accounts for 25%-35%, the grain size of the third particle group is larger than or equal to 0.5mm, and the sum of the three particle groups is 100%. The glass refining agent is not made of arsenic trioxide, is non-toxic, is safe in use and favorable for environmental protection and human health, plays an active role in developing green glass products, and can be applied to production of ultra-white glass as the iron content of the refining agent is low.

Description

technical field [0001] The invention relates to an auxiliary agent for glass production, in particular to a glass clarifying agent, its production method and its application in glass production. Background technique [0002] Glass emits a lot of gas during the melting process, which is because of various minerals (such as feldspar), metal salts (such as barium carbonate), oxides (such as SiO 2 ) The reaction products released by chemical reactions such as decomposition and melting. They are inevitable products in the glass production process, and at the same time, they are redundant reaction products free from the glass structure, called gaseous inclusions, generally called "bubbles". The existence of these bubbles will have a fatal impact on the final glass product. [0003] Depending on the glass composition and production process, the bubbles in the glass are characterized by chemical diversity and structural polymorphism. According to the source of the bubbles, there ...

AI Technical Summary

Problems solved by technology

However, when the temperature is lower than 1300 ° C, the components in the melt have not completely reacted, and new bubbles are constantly forming. At the same time, the melt is in a high-viscosity state without external forces, such as stirring and blowing air. , it is difficult to give full play to the role of clarifying agent