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Industry Overview
Sodium silicate is an important chemical that can be used either as a finished product or as a feedstock for manufacturing other finished products. It is the generic name for a series of compounds derived from soluble sodium silicate glasses, represented by the formula Na2(SiO2)nO. Sodium metasilicate, Na2SiO3, is a well-known member of this family.
Sodium silicates are aqueous solutions of sodium oxide (Na2O) and silicon dioxide (SiO2) combined in different ratios. Variations in the SiO2-to-Na2O ratio and solids content produce materials with different properties and a wide range of industrial applications. Standard commercial grades of liquid sodium silicate generally have SiO2/Na2O weight ratios from 1.6 to 3.3.
Sodium silicate with a SiO2/Na2O weight ratio of 1.6 to 2.5 is described as a base product of the silicate family. It can be marketed as dried powder or as a concentrated solution with a solid content of about 40–50°Bé and can also serve as a feedstock for producing other silicate products.
Commonly known as water glass or soluble glass, sodium silicates are generally classified according to their SiO2/Na2O ratio, which may vary between 0.5 and 4, together with varying proportions of water. This produces compounds ranging from strongly alkaline to nearly neutral materials and from crystalline or glossy solids to viscous liquids. Sodium silicate can be produced by fusing silica or sand with soda ash, while more recent approaches include production from paddy husk and rice husk ash. Commercial sodium silicates are available as amorphous, vitreous or crystalline hydrated and anhydrous compounds, as well as aqueous liquids with a wide viscosity range.
Cost Estimation
| Particular | Value |
|---|---|
| Plant Capacity | 10 MT/Day |
| Land & Building (2.5 Acres) | Rs. 5.04 Cr |
| Plant & Machinery | Rs. 3.01 Cr |
| Working Capital for 2 Months | Rs. 1.90 Cr |
| Total Capital Investment | Rs. 10.24 Cr |
| Rate of Return | 16% |
| Break Even Point | 66% |
Content Index
Appendix
Frequently Asked Questions
Sodium silicate is a family of compounds formed from sodium oxide and silicon dioxide in different proportions. It is commonly supplied as an aqueous solution, dried powder, or solid material and is also known as water glass or soluble glass. Its properties depend strongly on the SiO2/Na2O ratio and water content. The report identifies sodium metasilicate, Na2SiO3, as a well-known member of the sodium silicate family.
Sodium silicate is used across several industrial applications, including adhesives, drilling fluids, concrete and masonry treatment, soaps and detergents, water treatment, refractories, dye auxiliaries, and cement bricks. Its usefulness comes from the ability to produce grades with different chemical ratios and physical properties. Depending on the formulation, sodium silicate can provide alkalinity, binding, stabilization, or other functional properties required by specific industrial processes.
Sodium silicate is commonly manufactured by combining silica or sand with a sodium source such as soda ash through a high-temperature process. The resulting material can subsequently be processed into solid, powder, or liquid forms. The report also discusses routes using paddy husk and rice husk ash as silica-containing raw materials. Such alternative feedstocks can involve impurity removal, preparation of active rice husk ash, and conversion into soluble sodium silicate.
The SiO2/Na2O ratio and solids or water content are key factors affecting sodium silicate properties. Changing these proportions can influence alkalinity, physical form, viscosity, and suitability for different applications. Commercial liquid grades cover a range of SiO2/Na2O ratios, while sodium silicate may be supplied as a concentrated solution, powder, or solid. Processing conditions and the characteristics of the raw materials also influence final product quality.
Yes, rice husk ash can be used as a silica-containing raw material for producing soluble sodium silicate. The report specifically covers the conversion of rice hull ash into soluble sodium silicate and includes methods for producing active rice husk ash, removing impurities, and preparing sodium silicate from the resulting material. The suitability of rice husk ash depends on its chemical composition, silica characteristics, impurity level, and the processing method used.
Sodium silicate manufacturing requires appropriate arrangements for raw-material storage, process equipment, utilities, material handling, safety, buildings, roads, and waste disposal. The report also identifies plant location factors such as raw-material availability, markets, power and fuel, water, climate, transportation, labor, regulatory requirements, taxes, site characteristics, community factors, and fire and flood control. Proper plant layout should support efficient material movement, safe operations, future expansion, and reliable utility servicing.
The report includes project economics covering capital investment, working capital, operating costs, turnover, break-even analysis, financing resources, depreciation, and profitability. The stated project has a plant capacity of 10 MT/Day, with financial figures provided for land and building, plant and machinery, working capital, total capital investment, rate of return, and break-even point. Additional economic topics are listed in the report for detailed treatment, including cost of production, resources for finance, instalments, depreciation, profit analysis, and projected balance sheets.
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