Water glass wet production method

Abstract

The invention discloses a water glass wet production method. The method comprises mixing water glass having a baume concentration of 50Be and a liquid base having purity of 50% according to a ratio of 1: 1, cooling the mixture along with continuous stirring to precipitate sodium metasilicate pentahydrate crystals, introducing the crystals into a centrifugal machine when the temperature is reduced to 40 DEG C, carrying out dehydration treatment, exporting a sodium metasilicate pentahydrate mother liquor, mixing the sodium metasilicate pentahydrate mother liquor and quartz sand having silicon content of 98% and fineness of 150 to 200 meshes according to a weight ratio of 60: 40, feeding the mixture into a reactor, filling the reactor with steam under pressure of 0.6 MPa, and carrying out a reaction process for 6h to obtain high silica content water glass. The method solves the technical problem that the silica content does not satisfy the standard. The silica obtained by the method has the content of 32% and modulus of about 2.5, is in an excellent shape and is worthy of promotion.

Description

technical field [0001] The invention relates to a production process of water glass, in particular to a wet production process of water glass. Background technique [0002] In the middle of the 17th century, people widely used quartz powder (SiO 2 ) and soda ash (Na 2 CO 3 ) co-melted to produce glass. If a large proportion of soda ash is added, the resulting glassy substance can be dissolved in water in an autoclave. The solution is concentrated to a certain degree of solubility, and the viscous fluid obtained is less precisely called "water glass". This name is still used today. Water glass is an aqueous solution of silicate, also known as "sodium silicate", which is a water-soluble silicate compounded by different proportions of alkali metal oxides and silicon dioxide. [0003] With the development of society, people have discovered that water glass can improve the weathering resistance of materials on the surface of materials, and paint porous materials such as cla...

AI Technical Summary

Problems solved by technology

However, the market generally needs water glass with high concentration and high modulus. The above two processes are difficult to meet the requirements and cannot promote market development.