There are many kinds of grinding and processing equipment for heavy calcium in China. Generally, they can achieve the effect of ultra-fine production by combining with ultra-fine classifier to form an ultra-fine processing system. However, which production process and equipment is more reasonable needs to objectively evaluate various processes and equipment according to the fineness requirements of the market and the maximum profit of the enterprise. Then, how to select the dry process production line of heavy calcium? HCMilling(Guilin Hongcheng), as the manufacturer of the heavy calcium grinding mill equipment, is introduced below about the comparison of dry production processes of heavy calcium carbonate:

Heavy calcium carbonate super-fine vertical roller mill

At present, the main demand in China’s heavy calcium market is 600~1500 meshes of heavy calcium products; The added value increment rate of heavy calcium products is low (compared with talc, barite, kaolin, etc.), and scale is one of the main factors affecting the benefits. In order to meet the market requirements and enterprise profits, the processing technology and equipment of heavy calcium should be selected in principle: mature technology, reliable equipment operation, stable product quality, less investment per ton of product, and low energy consumption. How to select the dry process production line for heavy calcium? The dry superfine processing equipment for heavy calcium is mainly composed of grinding and grading equipment. Mature grinding equipment mainly includes heavy calcium carbonate Raymond mill, vibration mill, heavy calcium carbonate ultra-fine ring roller mill, dry stirring mill, heavy calcium carbonate vertical roller mill and ball mill. The classification equipment is mainly a impeller type superfine classifier manufactured by the principle of forced eddy current. The following is a comparison of dry production process of heavy calcium carbonate based on the technical characteristics of grinding equipment:

(1) heavy calcium carbonate Raymond mill+classifier process for heavy calcium carbonate. Raymond mill belongs to rolling and crushing. The motor drives the grinding roller, and the centrifugal force is used to force the materials to squeeze, friction and shear at low speed, accompanied by intermittent impact crushing. Raymond mill has great advantages in terms of investment and energy consumption when producing products below 400 meshes. However, the principle of rolling and crushing determines that the amount of fine powder produced by Raymond mill is relatively small. For example, among the 400 mesh fine powder, the fine powder<10 m only accounts for about 36% of g1]. Generally, the Raymond mill can be modified or the ultra-fine grading system can be added to produce ultra-fine products of 800~1250 meshes. However, because of the low content of micro powder, the production capacity of superfine heavy calcium powder above 800 meshes with Raymond mill is relatively small.

(2) Dry mixing mill+classifier process. The dry stirring mill is also known as the stirring ball mill. The mill body is a vertical cylinder, with a stirring shaft in the middle, and the animal material and medium are rotated to produce grinding. Its grinding efficiency is high, and it can be used together with a classifier, which is more suitable for the production of superfine heavy calcium above 1250 mesh; However, due to the large amount of contact between materials and grinding media, the pollution of impurities is large and the environmental protection effect is poor.

(3) Vibration mill+classifier process. Vibration mill is to use high-frequency vibration to make strong impact and grinding between grinding medium and materials, so as to crush materials. The vibration mill has high grinding efficiency and high content of fine powder in the powder, which is more suitable for grinding products with a mesh size of more than 1250; The length diameter ratio of vibration mill is large, and the over grinding phenomenon is serious. It is not a good choice for the production of heavy calcium.

(4) Heavy calcium carbonate superfine ring roller mill+classifier process. The mechanical structure and grinding mechanism of the ring roller mill are similar to those of the Raymond mill. Both of them belong to the centrifugal pressure of the grinding roller to feed materials and crush them. However, the structure of the grinding roller has been greatly improved. Its crushing efficiency is far better than that of the Raymond mill, and they are mainly used to produce superfine heavy calcium below 1500 meshes. At present, this kind of grinding equipment has been rapidly promoted in the heavy calcium industry because of its power saving and low investment. For example, HCH1395 ring roller mill is certified by the China Calcium Carbonate Association as an energy saving and consumption reducing equipment in the field of calcium carbonate superfine processing in China.

(5) Heavy calcium carbonate vertical roller mill+classifier process. The grinding mechanism of vertical roller mill (referred to as vertical roller mill for short) is similar to that of Raymond mill, which belongs to rolling and crushing. Since the pressure of the roller is applied by high-pressure hydraulic method, the rolling pressure of the roller on materials increases by tens of times or even more, so its crushing efficiency is far better than Raymond mill. At present, it is one of the mainstream equipment for large-scale production of heavy calcium. HLMX series super-fine vertical roller mill developed by HCMilling(Guilin Hongcheng) on the basis of ordinary vertical roller mill can separate the fine particles of materials ground by vertical roller mill, and the separation fineness range is 3um to 45um. It can realize the production of products of different specifications with one vertical roller mill, and can also rapidly and stably produce products of the same fineness. The classification system of secondary air separation is configured, which has high separation efficiency, can effectively separate coarse powder and fine powder, and the separation fineness can be up to 3 μ m. Obtain qualified products of various specifications. It is widely used in the processing of non-metallic minerals such as calcite, barite, talc and kaolin. Taking the production of calcium carbonate powder as an example, it can produce 325-3000 mesh products, especially suitable for 800-2500 mesh products, with a single unit production scale of 4-40t/h. It is widely adopted by domestic enterprises above designated size and famous powder companies in Europe and America.

(6) Ball mill+classifier process. The crushing principle of the ball mill is that materials and grinding media impact and grind each other in the rotation process of the ball mill. Its fine powder output is lower than that of the products grinded by dry stirring mill and vibration mill, but its processing capacity is higher than that of other processing equipment, which is suitable for large-scale processing enterprises. However, the energy consumption of products with the same fineness and capacity is much higher than that of vertical roller mill system. Its advantage is that the particle shape of the product is close to spherical, and the industry that requires particle shape has an advantage that other processes cannot match.

At present, there are many manufacturers in the heavy calcium processing technology and equipment market, and the technical indicators are leading at home or internationally. For investors, it is difficult to understand the actual situation. It is recommended that investors refer to the technical solutions of world famous technology manufacturers to understand their technical indicators when facing technical solutions and technical indicators. In the field of mechanical production of heavy calcium products, the advanced technical indicators are always the same or close. In terms of heavy calcium processing equipment, for the same production line, the installed power of each equipment manufacturer may differ by 30% or more. Only by selecting reasonable and scientific technical schemes can ideal production effects and economic benefits be achieved.

As a manufacturer with nearly 30 years of experience in calcium powder equipment manufacturing, HCMilling(Guilin Hongcheng) has rich customer cases. Our heavy calcium carbonate dry process production equipment, such as heavy calcium carbonate Raymond mill, heavy calcium carbonate ultra-fine ring roller mill and heavy calcium carbonate super-fine vertical roller mill, enjoys a good reputation at home and abroad. If you have any questions about how to select the dry process production line for heavy calcium, please contact us for details.