Method for manufacturing E glass fibers by using blast-furnace slag

Abstract

The invention discloses a method for manufacturing E glass fibers by using blast-furnace slag, which is characterized in that: the raw material of the E glass fibers is prepared by a method comprising: (1) removing impurities from blast-furnace slag and making the blast-furnace slag into grains with a grain size required by E glass fiber charging; (2) analyzing and testing the content of each main component of the blast-furnace slag; and (3) adding 0 to 40 weight percent of blast-furnace slag in the raw material for manufacturing the E glass fibers, calculating the required amount of other components according to the content of each component of the blast-furnace slag and the composition of components required by the production of E glass fibers, and complementing the balance with ore. In the invention, by introducing blast-furnace slag into the manufacturing of E glass fibers, the manufacturing cost of E glass fibers is reduced considerably, the production quality is improved, large amount of blast-furnace slag is consumed, the usage amount of fluorides is reduced and an active effect on environmental protection is achieve.

Description

technical field [0001] The invention relates to a production method of E glass fiber, in particular to a production method of using blast furnace slag instead of part of ore as a raw material to produce E glass fiber. Background technique [0002] Blast furnace slag is the waste slag produced when smelting pig iron. Silicon oxide (about 34.30% of the total weight), alkali metal oxide (about 0.43% of the total weight). Judging from its chemical composition and mineral composition, it belongs to the category of silicate. The four main components of blast furnace slag are the main components of soda-lime-silica glass. It contains very little volatile matter and has a stable physical and chemical structure. It is of great significance to increase the sustainable development of the glass fiber industry, reduce dependence on raw ore, save energy and reduce emissions, and promote the sustainable development of the national economy. [0003] E glass fiber is aluminoborosilicate gl...

AI Technical Summary

Problems solved by technology

[0003] E glass fiber is aluminoborosilicate glass fiber with an alkali metal oxide content of less than 1%. In the production process of traditional E glass fiber, ore is used as the main raw material, and ore as a mineral resource is non-renewable, and Most of them need to introduce fluoride in fluorite as a co-solvent, which will easily cause the glass liquid to corrode the wall of the kiln pool, reducing the service life of the kiln and the safety of production

At the same time, as a natural resource, ore is widely used in various industrial productions, so its supply is affected by many factors. Once the supply is limited, it will have a great impact on the sustainable production of E-glass fiber