Calcite used in paper making industry
Calcite (calcium carbonate), is a natural non-metallic minerals. Its chemical formula is CaCO3, theory of chemical composition: CaO 56.04%, CO2 43.96%, trigonal system, often has complex partial triangular body and three rhombohedral crystal aggregates were druse, granular, bell emulsion, or dense block Shaped, colorless or white, glassy luster, hardness 3, density of 26-2.8, the case of dilute hydrochloric acid severe blistering.
Heavy calcium carbonate and calcium carbonate color white, fine particles, can be applied to the paper surface coating. General coating is always a complex formula, a calcium carbonate with clay, but also CMC calcined kaolin or titanium dioxide, etc., and finally become a paste, then stick-type air knife, blade applied to the paper surface, after adding calcium carbonate to make paper brightness, whiteness, ink absorption and other characteristics are greatly improved. In the white paper, the general production of paper in the core after molding, then paint coating duplicity layer, primer, top coat (a coating of individual plants, but also plant is three times coating).
Paper industry
In many countries, the paper industry primer with 50% calcium carbonate and 50% clay, it also uses 100% calcium carbonate, calcium carbonate, but the primer is generally controlled at Pd60 level, which is about 60% 2um content, in the primer later, then coated with a layer of top coat, top coat with 30% generally and 70% calcium carbonate china clay. Calcium carbonate is generally used to control the Pd90 level, that is 2um content of about 90%, duplicity about paper weight to use calcium carbonate 2% to 4%.
The use of calcium carbonate in coated paper and paper board in the same, the difference is that the core paper, coated paper thin, and coated on both sides, relatively speaking, calcium carbonate, the weight of coated paper, cloth accounted for much higher proportion. There are also weight coated paper, coated kraft paper, etc., can be used coated calcium carbonate. Unlike calcium carbonate, calcium carbonate filler coating, the Division I is now producing special paper coating has good ink absorption of calcium carbonate, gloss, good flow of paint to achieve high solid content. The performance of the coating is very important, especially calcium carbonate can be added after the coated fabric content increased, the performance is very important, to reduce paper costs and improve the quality of the paper can play a key role.
Calcite powder application
Calcite powder is widely used in medical ultra, paper, rubber, building materials and other industries. Of these, calcite is the paper industry paper an innovative technology, this new paper does not consume the natural vegetation, do not use water without waste, emissions, can be widely used in office printing, house decoration, materials, packaging.
The project uses ultra-fine powder of calcite production of environmentally friendly paper (mainly for decorative base paper), decorative paper, paper as a new decorative materials are widely used in decorative panels, flooring, computer workstations, office and household appliances and so on. With the constant renewal of decorative materials, decorative paper, the application of the increasingly widespread.
Meanwhile, the national environmental policy to restrict the use of wood will be more and more restricted, as wood substitutes, artificial decorative panel market will be gradually expanded, to the decorative paper market, business opportunities, that the market prospects of such paper getting better. Processing as its matching decorative base paper, the current quantity and quality can not meet market demand, from a development point of view of the market potential of decorative base paper, which the paper-making enterprises, are a rare opportunity.
Calcite powder making equipments
During the calcite powder production line, we need calcite crusher, calcite grinding machine, calcite optional equipments etc. Calcite mobile crusher is the new and widely used stone crusher in recent 20 years. Primary calcite crushers are jaw crusher, JCE series jaw crusher and secondary calcite crushers are cone crusher, impact crusher, vertical shaft impact crusher etc. In order to get powder, we need grinding machine for next grinding processing such as ball mill, Raymond mill, vertical mill etc.
