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• Time of issue:2014-05-06
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(Summary description)Refractory materials are indispensable in many industries in the country and play an important role in the development of the country. Among them, the steel industry is the largest consumer of refractory materials. In 2010, China produced 62.67 million tons of crude steel. According to the calculation of 20 kilograms of refractory material per ton of steel, the demand for refractory materials for steel in China is about 12.53 million tons. In 2011, it was around 12.81 million tons. The cement industry is the second largest refractory material consumption field. In recent years, due to the development of highway construction, construction, airport construction, etc., the development of the cement industry is also in the forefront.

In recent years, under the strong pull of high-temperature industries such as steel, cement, glass and non-ferrous metals, China's refractory production increased from 14.77 million tons in 2003 to 28.08 million tons in 2010, with a compound annual growth rate of 9.6%. The output of shaped refractories has reached more than 1/3 of the total output. At the same time, the export volume of refractory products also increased significantly, from 827,000 tons in 2003 to 1,792,800 tons in 2010, a compound annual growth of 11.7%.

There are several methods for producing refractory products:

The refractory material differs depending on the degree of compactness and shape of the product, and there are a sintering method, a fusion casting method, and a melt blowing method. The sintering method is to pre-burn a part of the raw materials, crush and sift, and then mix with the raw materials according to a certain ratio, after molding, drying and firing. The purpose of raw material calcination is to burn off the water, organic impurities, and sulfate decomposition gas to reduce the firing shrinkage of the product and ensure the accuracy of the product dimensions. The raw materials need to be sieved after crushing and grinding, because the blanks are graded by powders of different particle sizes to ensure the closest packing to obtain a dense body. The smelting method is a process in which the raw materials are mixed and finely ground by the ingredients, melted at a high temperature, directly cast, cooled and crystallized, and annealed to form a product. Such as casting mullite bricks, corundum bricks and magnesium bricks. Their bodies are dense, with high mechanical strength, high temperature structural strength, good slag resistance, and the use range is constantly expanding. The melt blowing method is a method in which the ingredients are melted and then sprayed with high-pressure air or superheated steam to disperse them into fibers or hollow spheres. The products are mainly used as lightweight refractory and heat insulating materials. In addition, it can be made into a powdery or granular unshaped refractory material. It can be cemented with a binder such as tar, asphalt, cement, phosphate, sulfate or chloride when it is used. It can be used directly without molding and sintering.

Regardless of the preparation method, the mill equipment plays a very important role, because only the refractory processing raw materials can be processed into a fine powder of different fineness after being ground by a mill to fully integrate the various materials. , processing and production. Zhengzhou GM constantly 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 GM currently supplies different types of mill equipment such as Raymond Mill, high pressure suspension roller mill, high pressure mill, high pressure micro powder mill and superfine mill on the market. Each of the different types of equipment can be ground to produce different fineness of finished powder, 80 mesh - 425 mesh, 500 mesh - 2000 mesh, the finest can reach about 2500 mesh, which can fully meet the processing of refractory raw materials. demand.

Nowadays, the demand for refractory materials has increased, and the equipment of the mine-grinding mill has a broader development market. Therefore, the general mill equipment should keep up with the development trend of refractory materials, seize the opportunity of each development for itself, make its own enterprise grow stronger, and provide more favorable help for the development of the country.