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A kind of preparation method of core-shell structure high white precipitated calcium carbonate

The invention discloses a preparation method of core-shell structure high-white precipitated calcium carbonate. The method comprises the steps that digesting, screening, impurity removing and aging are conducted on low-quality-level and low-white quick lime, a crystalline form controlling agent is added to conduct carbonation reaction, and a formed low-white calcium carbonate particle is taken asa core; digesting, screening, impurity removing and ageing are conducted on high-white quick lime, the high-white quick lime is grafted to a core surface after carbonation reaction to be taken as a housing, filter pressing dehydrating, drying, pulverizing and grading are conducted after the reaction is completed, and the core-shell structure high-white precipitated calcium carbonate is obtained. According to the method, the white level of a calcium carbonate product with the white level of below 90 degrees can be improved to 90 degrees or above by the calcium carbonate prepared by the method,particular diameter distribution of the product is concentrated, the dispersing performance is good, the calcium carbonate is applied to PVC panels and tubular materials, and processing performance, whitening and toughening are achieved. The product technology is simple and implementable, the cost is low, the price is cheap, and the economic benefits are better.
Owner:卢氏国嵩莱纳米科技有限公司
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