Fine processing process for heavy calcium carbonate raw materials

Abstract

The invention discloses a fine processing process for heavy calcium carbonate raw materials. The process carries out whole-course quality control on multiple links of the production of heavy calcium carbonate, and the links comprise feeding, washing, crushing, conveying, manual sorting of materials, automatic sorting with a color sorter, warehousing after grading, precise material preparing before grinding and the like, so that the quality of the heavy calcium carbonate product is refined and diversified, and the products needed by different clients can be customized. The process adopts a variety of separation methods for impurities in the raw materials, so that the whiteness and other quality standards of calcium carbonate of the company are greatly improved. Compared with the prior art, the product quality of the Henan Zhongli Company goes up to a new stage on the whole, the blank that the heavy calcium production enterprises in the Nanzhao area fail to produce high-end calcium carbonate products is filled, and the process has great significance on increasing the market share of products.

Description

technical field [0001] The invention relates to the technical field of heavy calcium carbonate preparation, in particular to a fine processing technique for heavy calcium carbonate raw materials. Background technique [0002] Ground calcium carbonate, also known as ground calcium, is a powder product made of natural calcite, marble, chalk, etc., which is mechanically crushed and ground to a certain fineness. It is generally called finely ground calcium carbonate (FGCC) internationally. In order to distinguish precipitated calcium carbonate in the paper industry, GCC and PCC are used for abbreviation respectively. Generally, products with an average particle size below 12 μm are called heavy fine calcium carbonate to distinguish general heavy calcium carbonate. Calcium carbonate products are divided into special calcium for granite, special calcium for sealant, special calcium for rubber, special calcium for papermaking, special calcium for plastics, special calcium for pai...

AI Technical Summary

Problems solved by technology

However, due to the influence of geological formation conditions on local calcite resources, there are many impurities such as yellow bark and black veins in it, and there are defects in the design of the raw material preparation system of the existing production line, and the crushed ore cannot be completely sorted, resulting in The quality of the raw stones that enter the mill fluctuates greatly, the quality of the produced products cannot be completely controlled, the production cost increases, and the product sales are restricted

The shortcomings in the current production process are mainly reflected in the following aspects: the mining surface of the mine is limited by the area of ​​the site, and it cannot be sorted and stacked and loaded into the factory; there is no testing equipment in the mine, and the grade of "ground" calcite cannot be grasped in time; Due to the limitation of equipment conditions, the degree of on-site screening is too low to ensure that the rough stones with impurities such as "ribs" and "skin" can be effectively removed; there are defects in the raw material storage site (there is no "separate warehouse" or "sub-warehouse"), it is impossible to clearly distinguish when the rough stones entering the factory fluctuate; the process of matching crushing and grinding is on-site forklift matching

It is impossible to clearly distinguish the types of ore quality, and it is impossible to realize the precise matching of ore; manual screening of large ore before crushing can neither obtain higher screening efficiency nor ensure the quality of screening

Therefore, the existing raw material system cannot produce high-quality heavy calcium series products, and cannot meet the needs of high-end customers for high-quality products, which greatly limits the company's development

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