Glass clarifying agent and preparation method thereof

Abstract

The invention provides a glass clarifying agent. The glass clarifying agent is prepared from components of raw materials in parts by weight as follows: 5-10 parts of cerium oxide, 10-25 parts of fluorite, 10-25 parts of lithium feldspar, 5-10 parts of lepidolite, 5-20 parts of barium sulfate, 5-15 parts of calcium sulfate and 5-15 parts of barium carbonate. The glass clarifying agent has excellent clarifying effect, can realize the clarifying effect the same as that of arsenic trioxide, can also remarkably reduce the use quantity of production raw materials introduced through matching with the clarifying agent and reduces the production cost of glass, and the comprehensive effect is better than that of arsenic trioxide; besides, the problem of glass defects caused by high probability of microbubbles on a glass panel with the adoption of a cerium oxide and sulfate composited clarifying agent is solved by means of the glass clarifying agent. The preparation method of the glass clarifying agent is simple, realizes safe production, prevents environmental pollution and is applicable to large-scale production.

Description

technical field [0001] The invention relates to the technical field of glass clarifiers, in particular to a glass clarifier, and at the same time, to a preparation method of the glass clarifier. Background technique [0002] In the process of glass production and melting, due to the decomposition and volatilization of ingredients, a large amount of gas will be precipitated. In addition, due to the high decomposition temperature of some components, the delay of gas decomposition and the operation of batch materials, etc. Bring gas into the body. Except for individual products, the gas in the glass liquid mainly contains O 2 , CO 2 , N 2 、H 2 O, SO 2 , CO, etc., and mainly exist in three states: visible bubbles, dissolved gas, and chemically combined gas. When the glass forming process is over, the gas in the form of bubbles is not completely removed from the glass liquid, and the bubbles of the glass are formed. The existence of these bubbles seriously affects the quali...

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Problems solved by technology

According to the clarification mechanism, clarifiers can be divided into four categories: oxide clarifiers, sulfate clarifiers, halide clarifiers and compound clarifiers. The commonly used clarifiers are white arsenic (arsenic trioxide), antimony oxide, nitrate, sulfuric acid Salt, fluoride, rare earth compounds and compound compositions, etc. Among them, white arsenic is a clarifying agent with excellent clarification effect. It is commonly known as "clarifying king" in the glass industry. The clarification effect of antimony oxide is similar to that of white arsenic, and the clarification effect is also better. However, with the requirements of safe production and environmental protection, the use of highly toxic arsenic and antimony clarifiers has been banned. A lot of research has been done on the agent, and some composite clarifiers with good clarification effect have also been disclosed. However, since the chemical clarification effect of the clarifier on glass is realized by adding oxidants and multivalent oxides, it is easy to cause sulfur clarification and oxygen clarification. The contradiction between the resulting SO in the glass 2 , O 2 The disorder of the solubility gradient causes microbubbles to appear on the surface of the glass plate, resulting in glass defects

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