Expanded vermiculite products, production process

Made with expanded vermiculite products is necessary in many manufacturers a technology, then use the expanded vermiculite products are what make the production process and formula do, here you introduced one by one. For example:

Water glass expanded vermiculite products are expanded vermiculite as the main material for the adhesive water glass, sodium fluoride as coagulant, with a certain proportion, the mixing, casting, molding, made of a roasting products. Typically, the water glass and expansion ratio of 2:1 vermiculite, sodium fluoride 13% of the amount for the water glass. The relative density of sodium silicate to 1.27 is appropriate, products, compressive strength 0.9Mpa. When the water glass density is less than 1.27, the products of the intensity dropped significantly. Vermiculite grain size distribution of the intensity and technical performance of products, in particular, have a greater impact absorption properties. The production process, sometimes adding some of the ceramic, brick powder, asbestos, diatomite and other supporting material, particle size generally requires 5 ~ 20mm.

Water glass expanded vermiculite products, production process shown below.

Expanded vermiculite + water glass → mixing → mixing → vermiculite plus compression molding high temperature curing → → → stripping products

The process had known: According to the ratio of measurement, first mixing sodium silicate and sodium fluoride, and then joined the expanded vermiculite mix, shape. Mode after unloading at 25 ℃ or more products in the conservation of the environment. Curing temperature greater impact on product performance, at higher temperatures, water glass and coagulant to react quickly, water discharge fast, long-hardening process. When the ambient humidity, water conservation products in the more difficult to discharge, so the conditions permit, the best products for treatment of water glass to make the structure compact and improve strength. Heat treatment temperature is generally 450 ℃.