The latest selenium masterbatch for coloring glass

2022-10-01
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Selenium masterbatch for coloring new glass bottles improves production efficiency

selenium powder is a colorant often used in the production of brown glass, pink glass, gray glass and other colored glass. The production of new projects will add 320000 tons of capacity to the company. The melting point of selenium is 217 ℃, and the boiling point is 685 ℃. Due to the low melting point, in the melting process of colored glass, researchers previously tried to use plant fiber as a substitute. More than 60% of selenium volatilized with the flue gas and was wasted. It not only increases costs but also pollutes the environment

in order that the machine can also do long-term wear-resistant experiments of lubricants, reduce the volatilization of selenium in the production of colored glass, and improve the utilization efficiency of selenium powder, China Yaohua Glass Group Co., Ltd. organized engineers and technicians to carry out a lot of research work. After nearly two years of research, selenium masterbatch for glass coloring was finally developed. Using this selenium masterbatch can reduce the amount of selenium powder by about 50%

research shows that selenium volatilizes mainly above the boiling point temperature and before the formation of the glass during the glass melting process. Therefore, if a substance (adsorbent) with strong adsorption on selenium vapor is added to the glass batch, the purpose of reducing selenium volatilization can be achieved. At the same time, the influence of the added adsorbent on the physical and chemical properties of the glass should be as small as possible, and it is best to become an oxide in the design composition of the glass after high-temperature reaction

The close contact between selenium and adsorbent in glass batch is another key problem to reduce selenium volatilization. Therefore, selenium and its adsorbent must be bonded together in advance, so that they will not be separated when the batch is mixed and prepared as far as possible

the principle of selenium saving in selenium masterbatch is to adopt a special process to bond the adsorbent with strong adsorption of selenium and selenium powder together, so that the two will not be separated during the mixed preparation of the batch. In this way, the selenium powder is adsorbed by the adsorbent before the formation of the glass, the volatilization is significantly reduced, and finally melts into the glass. Selenium masterbatch for glass coloring has been successfully applied in the float line of China Yaohua Glass Group Corporation. 21 tons of selenium masterbatch made from 1 ton of selenium powder can be used at the selenium content of 9.5%, which is equivalent to about 2 tons of selenium powder. That is, the selenium saving rate reaches 50%. The substances introduced into selenium masterbatch are converted into glass design components through high-temperature and free replacement. As long as the masterbatch is brought into the batching table during feeding, the chemical composition of glass will not change

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