Calcium carbonate industry seeks to improve quality and efficiency

　　The 2015 National Calcium Carbonate Industry Annual Conference hosted by the China Inorganic Salt Industry Association Calcium Carbonate Industry Branch was held in Hezhou, Guangxi. The conference aims to promote exchanges and cooperation between research institutes and enterprises, and promote low-carbon, environmentally-friendly, clean and green development of the calcium carbonate industry to achieve quality and efficiency.

　　The reporter of China Chemical Industry News learned from the meeting that the current development of various regions and enterprises in the calcium carbonate industry is very uneven, facing problems such as overcapacity, declining efficiency and fierce competition for low-end products. Ye Haiting, honorary president of China Inorganic Salt Industry Association, stressed that enterprises that are not innovative will be eliminated. Calcium carbonate enterprises should implement innovations in production processes, products, marketing, culture and management, and strive to promote sustainable development of the industry.

　　Liu Shuwen, president of the Calcium Carbonate Industry Branch of China Inorganic Salt Industry Association, said that to achieve quality improvement and efficiency improvement, it is necessary to prevent low-level and homogenization and redundant construction through scientific and technological innovation and industrial restructuring; to the National Industrial Structure Adjustment Guidance Catalogue (revised in 2014) As a guide, we will guide enterprises to transform and upgrade in terms of energy saving and emission reduction, quality improvement and consumption reduction, brand efficiency, etc., and do a good job in terms of specialization, precision, speciality and newness. The so-called light and heavy, that is, calcium carbonate production enterprises should produce light and heavy calcium carbonate at the same time, and combine the two under certain conditions to make the products more effective.

　　Tao Lianyin, executive deputy secretary-general of China Inorganic Salt Industry Association, believes that the adjustment of industry product structure should increase the proportion of specialized and refined products and compress the output of low-performance products. According to the drying capacity of equipment and the accumulated experience of industry development over the years, medium-sized enterprises are suitable for “532” and small enterprises are suitable for “311” capacity structure model. These three figures represent the production capacity of light calcium carbonate, active fine calcium carbonate and heavy calcium carbonate. The production capacity structure is implemented, and water recycling can be realized in the production process to reduce wastewater discharge. In addition, qualified enterprises should accelerate the development of intelligent and networked, transform the technological process with information technology, and win the initiative in the new round of scientific and technological revolution and industrial transformation and upgrading.

　　Hu Yongqi, vice president of Hebei University of Science and Technology and expert group of calcium and magnesium branch of China Inorganic Salt Industry Association, pointed out that the technological innovation of calcium carbonate industry should seek breakthroughs in production technology and equipment. Among them, the production process should be developed in the direction of production functionalization and specialization products, and the added value of products should be improved. For example, the development of heavy calcium carbonate products dedicated to a certain industry, the added value is several times or even higher than ordinary products. For example, by surface modification of existing low-end products, the production of special crystalline calcium carbonate into the plastic can improve the performance of the plastic while greatly reducing the production cost. In terms of production equipment, we should aim at energy conservation and consumption reduction, promote the development of China's equipment on the basis of large-scale, and gradually surpass the advanced level of foreign countries.

　　Fang Xiaoxia, chief engineer of Zhejiang Wuzhou Calcium Industry Co., Ltd., told reporters that China's calcium carbonate raw materials are abundant, and the high-performance calcium carbonate products produced after modification can completely replace carbon black, white carbon black, kaolin, titanium dioxide and other fillers. Cost, increase profits.

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　　Calcium carbonate production process is mainly divided into two categories: one is light calcium carbonate (light calcium), which is made by chemical method of limestone. The production process is long, and the “three wastes” emit more, but the particles are fine and the product quality is high. Meet a variety of user requirements. The other type is heavy calcium carbonate (heavy calcium), which directly crushes and grinds limestone into a product. The production process of heavy calcium is short, and the “three wastes” have low emissions and low energy consumption.

　　In recent years, developed countries have focused on the development of heavy calcium production technology. With the advancement of heavy calcium processing equipment and grading technology, a variety of fine calcium carbonate products that meet the major downstream industries such as plastics and papermaking have come out, and manufacturers have adopted energy-efficient Large-scale equipment and advanced production technology, the product replaces light calcium on a large scale, and the environmental protection effect is remarkable. However, the development of China's calcium carbonate industry has long focused on light calcium production, and the development of heavy calcium production is slow. At present, the ratio of heavy calcium to light calcium used in the plastics industry in developed countries is 20:1, while the ratio of heavy calcium to light calcium in China's plastics industry is only about 2:1, far lower than that of developed countries.

　　Activated calcium carbonate is modified on the basis of ordinary calcium carbonate, and can achieve the dual purpose of filling and modifying in composite products. These modifications include modification of the crystal form, particle size, particle size distribution and surface properties of calcium carbonate to improve its overall performance.