white cement
White cement is a type of special cement, belongs to decoration cement. In general, Portland cement is greyish-green, as the name suggested, white cement is white.In the cement manufacturing process, in order to avoid the mixing of colored impurities, calcination of white cement plant most
Send inquiryWhite cement is a type of special cement, belongs to decoration cement. In general, Portland cement is greyish-green, as the name suggested, white cement is white.
In the cement manufacturing process, in order to avoid the mixing of colored impurities, calcination of white cement plant mostly use natural gas or heavy oil as fuel. Reduction slag, gypsum and white granulated slag produced by electric steelmaking can also be used to produce white cement without clinker.
How to Build
The white cement manufacturing process is similar to the Portland cement manufacturing process, so we introduce the factors that affect cement quality. Just like general cement manufacturing plant, the white cement manufacturing process can be generally divided into six steps:
Crushing：carbonate composition mostly uses primary crushing. Since a large number of dyeoxides are concentrated in the fine particles, it is best to screen the fine particles before feeding them into the cement crusher. The clayingredients are usually broken individually
Cement raw materials grinding:
most of cement raw materials should be ground in the cement mill, and the grinding body can’t contain iron. As for the fineness, the white cement manufacturing process requires a finer size than that of Portlandcement.Homogenization: the homogenized raw materials only are promised to have heterogeneity at microscopic scales.
The homogenization is very important to the white cement manufacturing process, its multi-component mixtures are generally more prone to segregation than raw materials used in the gray cement production lines.Clinker production:
There are various combinations of preheating and calcining systems, and which process is better depends on whether the existing plant needs to be rebuilt and how much the plant operators invest in the construction. The cement rotary kiln and cyclone preheater are the recommended group here.Cement grinding: cement is made from cement clinker and thickening time control agents like gypsum or anhydrite. The gypsum generally uses jaw crusher, 90% of particles are less than 6mm, the biggest size is 80mm.
Packing and shipping:
the finished cement is generally stored in the cement silo, and for different uses, white cement can be packed or in bulk to transport to the desired place.
High requirement for white cement manufacturing process:
it is difficult to make high-quality white cement, which requires high-quality raw materials, strict grinding process and calcination. Thewhite cement calcination temperature up to 100-150℃.Cement clinker mineral composition:
white cement clinker contains 10-15% tricalcium silicate, 15-20% silicate minerals, basically no content of iron phase minerals, free calcium oxide generally used for Portland cement.Admixture:
white cement usually use limestone and dolomite, white the admixture of Portland cement include fly ash, slag, and volcanic ash.Fineness: the white cement is finer than Portland cement.
Part of property: the variation trend of the heat of hydration, fluidity, setting time, shrinkage, brittleness is different.
Industry Applications
White Portland cement is main kind of white cement. low content of ferric oxide and other non-ferrous metal oxide of limestone, clay, silica are used as the main raw material, after high temperature calcination, quenched into cement clinker, adding suitable amount of gypsum (can also add a small amount of white limestone instead of part of the clinker) into cement grinding mill equipped with stone or wear-resistant metal plate and grinding medium.
Uses:
white Portland cement is similar to ordinary Portland cement in physical properties, mainly used as decorative materials for buildings, but also for sculpture crafts. The use of white cement also includes putty powder, coating, caulking agent, binder, waterproof coating, terrazzo, artificial stone, floor tile, permeable brick, washing stone, sculpture, wear-resistant floor, color cement and so on
