The use of sodium silicate is very wide, almost all over the economy in each department. In the chemical system is used to make the silica gel, the white carbon black, zeolite molecular sieve, five water sodium metasilicate, silicon sol, layer of silicon and instant powder sodium silicate, potassium sodium silicate, etc. Various kinds of silicate kind of product, is the basic materials of silicon compounds. In a developed economy, with sodium silicate as raw material processing of series products have development to more than 50 kinds, some has been applied in high-quality precisioninstrument areas of science and technology; In the light of detergent and soap and detergent is indispensable to the raw material, water quality is acting for settling agent; In the textile industry for help catch, bleaching and sizing; In mechanical industry widely used in casting, grinding wheel manufacture and metal preservatives, etc.; In the construction industry used to make quick dry cement, cement waterproof oil, acid soil curing agent, fire-proof material, etc.; In agriculture can manufacturing silicon fertilizer; Also used as oil of catalytic cracking unit silicon aluminium catalyst, soap packing, adhesives, sealants, corrugated metal preservatives, water softener, detergent additives, refractory materials and ceramic raw materials, textiles bleaching, dyeing and pulp, mine ore dressing, waterproof, plugging, wood fire prevention, food preservation and the adhesive and so on... . Of points as follows:
1. The coating material surface, and improve the ability to fight decency
Sodium silicate coating solution or dipping materials, can penetrate into gap and pore, curing silicon gel can jam wool stoma channel, increase the density of material and intensity, so as to improve the resistance of the material to the weathering ability. But the sodium silicate is not to be used to besmear brushs or dipping gypsum products. Because sodium silicate reacts with gypsum sodium (Na2SO4), in the products pores crystallization expansion, leading to gypsum products cracking destruction.
2. Reinforced soil
Will the sodium silicate and calcium chloride solution alternating injection in the soil, two solution reacts quickly silica gel and calcium silicate gel, have cementation and pore filling in the role of the soil strength and improve the bearing capacity. Often used in powder soil, sand and the filled soil foundation reinforcement, called dual fluid grouting.
3. Preparation of speed water-proofing agent
Sodium silicate with various "can be made into speed of the waterproof agent, used for plugging, seam filling local repair. The waterproof agent "of condensate of speed, generally for a few minutes, four of them no more than 1" waterproof agent min, so the site must be used with do that which match. "More commonly used waterproof agent bravery" (copper sulfate,), red "(potessium dichromate, K2Cr2O7), alum (also called alum, vitriolic potassium), purple" four ", etc.
4. Preparation anti-acid, acid mortar and concrete acid
Anti-acid is water glass and acid powder (commonly used quartz powder) made from. And acid mortar and concrete, mainly used in the engineering requirements have acid. Such as sulfuric acid pool, etc.
5. Preparation heat-resistant gel, heat resistant mortar and heat resistant concrete
Sodium silicate gel mainly used for refractory lining and repair. Sodium silicate heat-resistant mortar and concrete is mainly used in blast furnace foundation and other are heat resistant requirements for the structure parts.
6. Anticorrosive engineering application
Modified sodium silicate acid clay is acid corrosion important materials, main characteristic is acid, temperature and close-grained anti-permeability, low prices and easy to use. But mixing into acid-proof daub, acid mortar and concrete acid, used in chemical industry, metallurgy, electric power, coal, textile and other departments all kinds of structure of the corrosion resistant engineering, building structure is spinning acid storage acid pool, acid, and acid surface floor building materials ideal.
7. Casting system model (core) cohere agent
50 s sodium silicate blow carbon dioxide wide application process, the process of sodium silicate join high, collapsibility bad, old sand can't reuse, waste of silica sand resources, a large number of discharge solid waste, damage the ecological environment, production casting quality rough, make its face be eliminated. Ester sclerosis new sodium silicate sand from hard appeared in 1999, sodium silicate addition amount of 1.8 3.0%, high strength, good, old sand collapsibility renewable reuse, back to YongLv 80-90%, can use time can be adjusted, and can be used in the production mechanization modelling, also can be used for single small batch production. Can produce a few kilograms to hundreds of tons of all kinds of casting, is now in railway vehicle, metallurgical machinery, heavy machinery, mining machinery, general machinery factory dozens of enterprise application. New type of sodium silicate is called the sustainable green environmental protection casting cohere agent.
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