Mill equipment keeps up with the development momentum of refractories

May 16,2014


Refractories are indispensable in many industries in the country, and they play an important role in the development of the country. Among them, the steel industry is the largest consumer of refractories. In 2010, China produced 626.7 million tons of crude steel. According to the calculation of 20 kilograms of refractories consumed per ton of steel, the annual demand for refractories for steel in China is about 12.53 million tons, which is expected to be about 12.81 million tons in 2011. The cement industry is the second largest consumer of refractories. In recent years, due to the development of highway construction, construction, airport construction, etc., the development of the cement industry is also in full swing.

In recent years, under the strong pull of high-temperature industries such as steel, cement, glass, and nonferrous metals, China's refractory output increased from 14.77 million tons in 2003 to 28.08 million tons in 2010, with a compound annual growth rate of 9.6%; among them, energy-saving and environmentally friendly amorphous The output of refractory materials has reached more than 1/3 of the total output. At the same time, the export volume of refractory products has also increased significantly, from 827,000 tons in 2003 to 1.7928 million tons in 2010, with a compound annual growth rate of 11.7%.

The production of refractory products has the following methods:

Refractories vary according to the density and shape of the product, including sintering method, casting method and melt injection method. The sintering method is to pre-fire part of the raw materials into clinker, crush and sieve, and then mix with the raw material according to a certain ratio, through molding, drying and firing. The purpose of raw material pre-firing is to burn off the moisture, organic impurities, and sulfate-decomposed gases in it to reduce the firing shrinkage of the product and ensure the accuracy of the external dimensions of the product. The raw materials also need to be sieved after crushing and grinding, because the blanks are graded by powders of different particle sizes, which can ensure the closest accumulation to obtain a dense body. The melting and casting method is to melt the raw materials at high temperature through processes such as mixing and fine grinding of batches, directly casting, cooling, crystallization and annealing to become products. Such as casting mullite bricks, corundum bricks and magnesia bricks. Their blanks are dense, with high mechanical strength, high high temperature structural strength, good slag resistance, and the scope of use is constantly expanding. The melt injection method is a method of melting the ingredients and spraying them with high-pressure air or superheated steam to disperse them into fibers or hollow spheres. Products are mainly used as lightweight refractory and heat insulation materials. In addition, it can also be made into powdery or granular amorphous refractory materials, which are temporarily cemented with binders such as tar, asphalt, cement, phosphate, sulfate or chloride salts, and can be used directly without molding and sintering.

No matter which kind of preparation method, mill equipment plays a very important role, because only after the raw materials for refractory processing are ground and processed into fine powders of different fineness by a mill can a variety of materials be completely integrated and processed. Production. Zhengzhou General continuously investigates the market and continuously improves and perfects the existing mill equipment, so that it can adapt to the development of the times and meet the different needs of the market. Zhengzhou General has currently supplied different types of mill equipment such as Raymond mill, high-pressure suspension roller mill, high-pressure mill, high-pressure micro-mill, and ultra-fine mill in the market. Each of its different types of equipment can grind and process finished powders of different fineness, 80 mesh-425 mesh, 500 mesh-2000 mesh, and the finest can reach about 2500 mesh, which can fully meet the different needs of refractory raw material processing.

Now, the demand for refractory materials is increasing, and the general mill equipment also has a broader development market. Therefore, general mill equipment should keep up with the development momentum of refractory materials, seize every development opportunity for itself, make its own enterprise stronger, and provide more favorable help for the development of the country.

Louzi Village, Qidu Town, Linzi District, Zibo City, Shandong Province, China

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