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Refractory materials generally refers to the degree of fire in the 1580 C or more inorganic non-metallic materials, including natural ore (refractory raw materials) and according to a certain purpose and requirements, according to a certain process to produce a variety of products (fire resistance), with a certain degree of high temperature mechanical properties and good volume stability. Refractory materials are steel, nonferrous metals, petrochemical, building materials, machinery, electric power, environmental protection and even national defense and other important basic materials, but also a variety of high temperature industrial furnaces and equipment indispensable support materials. Technological progress of refractory materials plays an important role in the development of high temperature industry. Type of refractory material: 1.Acidic refractory material usually refers to SiO2 content of more than 93% of the refractory materials. Its major characteristicis that it can resist the erosion of acidic slag at high temperature, but easy to react with basic slag. Acid refractory materials commonly used silica brick and clay brick. 2.Basic refractory material generally refers to Magnesium Oxide or Magnesium Oxide and calcium oxide as the main component of refractory materials. This kinds of refractory material has higher refractoriness, and it can resist basic slag. 3.Alumina silicate refractory is the refractory material which is mainly composed of SiO2 - Al2O3, according to the content of its Al2O3 can be divided into semi-siliceous (Al2O3 15 ~ 30%), clay (Al2O3 30 ~ 48%), high Aluminum (Al2O3 greater than 48%) 4.The fused cast refractory is a refractory product with a certain shape, which is melted by a certain method to melt the batch at high temperature. 5.Neutral refractory is refractory material which is not easy to react with acid or basic slag at high temperature. Such as carbon refractory and chrome refractory. Some of these materials are also attributed to this kind of Neutral refractory. 6.Special refractories are new inorganic non-metallic materials developed on the basis of traditional ceramics and general refractory materials. 7.Unshaped refractory is a mixture of refractory aggregate and powder, binder or other admixture, which can be used directly or after proper liquid mixing. Article source: http://www.chinafirebrick.com/Company_News_125.html
uring continuous casting, the casting powder is mostly used (together with submerge nozzle) except from casting billets with small section. Practice has proved that this process is one of the important conditions to ensure the quality and normal operation of casting billet. In the early 1970s, the process was successfully applied to slab continuous casting in our country and solved the problem of slab longitudinal crack, and then was gradually popularized and applied. In recent years, a series of protective slag has been established, Some special fluxes for continuous casting of special steel are developed, which provide necessary conditions for further development of continuous casting in China. There have many kinds of refractory products in our factory. Function of mold fluxes: 1 Insulation 2 Isolating air and preventing molten steel from oxidizing two times 3 Purify the slag interface and absorb the inclusions in molten steel 4 Lubrication shell and improve the heat transfer of solidification Article source: uring continuous casting, the casting powder is mostly used (together with submerge nozzle) except from casting billets with small section. Practice has proved that this process is one of the important conditions to ensure the quality and normal operation of casting billet. In the early 1970s, the process was successfully applied to slab continuous casting in our country and solved the problem of slab longitudinal crack, and then was gradually popularized and applied. In recent years, a series of protective slag has been established, Some special fluxes for continuous casting of special steel are developed, which provide necessary conditions for further development of continuous casting in China. There have many kinds of refractory products in our factory. Function of mold fluxes: 1 Insulation 2 Isolating air and preventing molten steel from oxidizing two times 3 Purify the slag interface and absorb the inclusions in molten steel 4 Lubrication shell and improve the heat transfer of solidification Article source: http://www.wanhaorefractory.com/en/new/The-applicaion-of-casting-powder.html
uring continuous casting, the casting powder is mostly used (together with submerge nozzle) except from casting billets with small section. Practice has proved that this process is one of the important conditions to ensure the quality and normal operation of casting billet. In the early 1970s, the process was successfully applied to slab continuous casting in our country and solved the problem of slab longitudinal crack, and then was gradually popularized and applied. In recent years, a series of protective slag has been established, Some special fluxes for continuous casting of special steel are developed, which provide necessary conditions for further development of continuous casting in China. There have many kinds of refractory products in our factory. Function of mold fluxes: 1 Insulation 2 Isolating air and preventing molten steel from oxidizing two times 3 Purify the slag interface and absorb the inclusions in molten steel 4 Lubrication shell and improve the heat transfer of solidification Article source: uring continuous casting, the casting powder is mostly used (together with submerge nozzle) except from casting billets with small section. Practice has proved that this process is one of the important conditions to ensure the quality and normal operation of casting billet. In the early 1970s, the process was successfully applied to slab continuous casting in our country and solved the problem of slab longitudinal crack, and then was gradually popularized and applied. In recent years, a series of protective slag has been established, Some special fluxes for continuous casting of special steel are developed, which provide necessary conditions for further development of continuous casting in China. There have many kinds of refractory products in our factory. Function of mold fluxes: 1 Insulation 2 Isolating air and preventing molten steel from oxidizing two times 3 Purify the slag interface and absorb the inclusions in molten steel 4 Lubrication shell and improve the heat transfer of solidification Article source: http://www.wanhaorefractory.com/en/new/The-applicaion-of-casting-powder.html
China's steel plants mainly used aluminosilicate refractory materials, including clay, alumina brick and so on in 1950s. Since the 1980s, China has successively developed the aluminum-magnesium carbon, coal quality calcium and magnesium and other several series of new steel package refractories. Where the aluminum-magnesium carbon refractory materials are of varieties, all specifications, is China's major ladle refractories. In earliest 20th Century 50--60 years, a variety of clay bricks were mainly used in our country. Due to low cost, until the 1980s, some steel plants were using clay bricks as ladle lining material. Although clay bricks is no longer used as ladle material so far, it had made a great countribution for recovery and future development of China's steel industry in the early days. With the continuous development of steelmaking technology, steel quatity and quantity, clay bricks was no longer used because of short service life. Some of our mills started using a variety of high alumina bricks as ladle lining material, in which way the ladle life got a greatly improvement, high aluminum ramming mass, wax brick, alumina magnesia, aluminum-magnesium casting material, aluminum-magnesium unfired brick, aluminum-magnesium spinel castable, aluminum MgO-C, magnesium aluminate spinel brick, aluminum-magnesium unfired brick and a series of high-grade refractory materials appeared to adapt to higher demand. Article source: Ladle lining refractory materials http://www.chinafirebrick.com/Company_News_124.html
First, refractory production continued to decline. The refractory production in 2016 continued the downward trend in 2015, a decrease of 8.56%. The main reason for the decline in refractory production is the rapid and drastic reduction in the market demand for refractory materials for infrastructure projects. ?From the output of different refractory products, silicon brick production decreased the most, as high as 37.59%; high alumina products and clay products were down more than 10%. Second, the export trade situation is grim. In 2016, the total export volume of refractory raw materials and products fell to its lowest level in the past five years, only 2.565 billion USD, down 11.62%, and a decrease of 765 million USD from the 3.33 billion USD, the highest point in 2014, down 22.97%. Third, the imports of refractory raw materials have increased. In 2016, the total imports amount of refractory raw materials and products is 324,900 tons, an increase of 17.54%. The amount of refractory raw materials is 305,800 tons, an increase of 17.78%; the amount of refractory products is 19,100 tons, an increase of 13.92%. Article source: The Characteristics of Refractory Industry
First, refractory production continued to decline. The refractory production in 2016 continued the downward trend in 2015, a decrease of 8.56%. The main reason for the decline in refractory production is the rapid and drastic reduction in the market demand for refractory materials for infrastructure projects. ?From the output of different refractory products, silicon brick production decreased the most, as high as 37.59%; high alumina products and clay products were down more than 10%. Second, the export trade situation is grim. In 2016, the total export volume of refractory raw materials and products fell to its lowest level in the past five years, only 2.565 billion USD, down 11.62%, and a decrease of 765 million USD from the 3.33 billion USD, the highest point in 2014, down 22.97%. Third, the imports of refractory raw materials have increased. In 2016, the total imports amount of refractory raw materials and products is 324,900 tons, an increase of 17.54%. The amount of refractory raw materials is 305,800 tons, an increase of 17.78%; the amount of refractory products is 19,100 tons, an increase of 13.92%. Article source: The Characteristics of Refractory Industry

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