博文

Tar Dolomite Refractory Bricks

-
图片
Tar dolomite refractory brick products are various shaped refractory brick products made from high-quality sintered dolomite as raw material and adding tar or asphalt as binding agent. Tar Dolomite Refractory Bricks (1) Characteristics of raw materials. Sintered dolomite is the main raw material for tar dolomite refractory brick products, and its chemical composition, sintering degree and freshness must be qualified. Tar and asphalt act as binding agents in tar dolomite refractory brick products. It is distributed between the sintered dolomite particles and partially penetrates into the interior of the dolomite. During the heating process, fine volatiles are softened, leaving fixed carbon, which is further graphitized to form a carbon network skeleton. Thereby enhancing and improving the high-temperature structural strength (load softening temperature), slag resistance and hydration resistance of the product. At the same time, the carbon mesh skeleton improves the thermal conductivity
发表评论
阅读全文

Wear-Resistant and Corrosion-Resistant Mullite Refractory Castable for Hazardous Waste Rotary Kiln

-
图片
For hazardous waste treatment rotary kilns, the composition of hazardous waste is complex and diverse. Among them, medical hazardous waste includes glass slides, infusion bottles, injection tubes, surgical residues, animal testing waste, etc. Therefore, the complexity of the chemical composition of hazardous waste is determined. Hazardous waste is generally burned in a rotary kiln at a temperature of 700 to 1000°C. Moreover, the main component of the gas after calcining hazardous waste is acidic. mullite castable for hazardous waste rotary kiln Working Conditions for Refractory Castable Lining of Hazardous Waste Rotary Kiln Among refractory materials, refractory bricks, and castables have good stability against acidic gases such as sulfuric acid gas and hydrogen chloride gas. However, when the operation is stopped and the temperature in the rotary kiln drops below the dew point, the corrosion caused by the acid needs to be considered. Among them, when the chlorine concentration exceeds
发表评论
阅读全文

How to Improve the High-Temperature Performance of Corundum-Mullite Castables?

-
图片
Corundum-mullite refractory castable has the advantages of high softening temperature under load, good chemical stability, and thermal shock resistance. Silicon carbide is widely used as a high-grade refractory raw material for the lining material of industrial kilns such as blast furnaces and heating furnaces. Among refractory materials, alkali resistance, corrosion resistance, high thermal conductivity, thermal shock resistance, and crusting resistance have always been the focus. High-alumina mullite bricks containing an appropriate amount of silicon carbide have been widely used in the decomposition zone and transition zone of cement rotary kilns, and their service life is 3 to 4 times longer than that of high-alumina bricks. Foreign studies also believe that adding silicon carbide can reduce the formation of low-melting point feldspar mineral phases and make castables have certain self-healing properties. Corundum-Mullite Castable Effect of Adding Silicon Carbide to the Properties
发表评论
阅读全文

Nitrogen Silicon Carbide Furnace Eye Bricks for Submerged Arc Furnaces

-
图片
Ferroalloy ore furnace linings are basically carbonaceous linings. Carbonaceous furnace lining has very obvious advantages, but carbonaceous materials have obvious shortcomings in practical applications such as tap holes. After continuous exploration and application, Nitrogen Silicon Carbide Bricks were finally selected as the taphole material. At the same time, it has continuously changed its masonry methods and operating procedures for the use of furnace eyes and has achieved certain success. Ferroalloy Ore Submerged Furnace Lining Nitrogen Silicon Carbide brick manufacturing process principle and advantages and disadvantages Nitrogen Silicon Carbide bricks use silicon carbide (SiC) as aggregate, add industrial silicon powder, stir evenly, and stamp into shape. The thickness should be moderate and not too thick. If it is too thick, the nitrogen permeability will be low and the performance of the product will be reduced. It is nitrided and sintered at high temperature, 3Si+2N2=Si3N4.
发表评论
阅读全文

Special Grade High Alumina Brick-Corundum Brick

-
图片
Special grade high alumina brick is a dense special grade high alumina brick with high compressive strength and high density. The firing temperature of this  high-alumina brick is similar to that of ordinary high-alumina bricks, with low energy consumption and low cost. Its service life in the kiln is twice that of ordinary high- alumina refractory bricks . It uses special-grade bauxite clinker calcined in a rotary kiln as aggregate, with a particle size of 1smm to 3smm. Weight ratio: 40% to 45%, adding bauxite clinker powder and fine powder: 45% to 51%. Soft clay: 7% to 10%, a small amount of kyanite powder: 3 to 5%. And it consists of 4% to 5% of adhesive pulp waste liquid. During production, the bauxite clinker needs to be crushed and sieved, and the powders are mixed and ground together. After batching, mixing, shaping, and drying, it is fired into refractory bricks at 1440~1460℃. Special Grade High Alumina Brick Special grade high alumina bricks are high alumina refractory bricks
发表评论
阅读全文

High-Temperature and Explosion-Proof Corundum High-Strength and Wear-Resistant Castable for Kiln Lining

-
图片
Corundum high-strength wear-resistant refractory castable is a wear-resistant refractory castable formed by high-strength and low-cement combination materials cemented with corundum, silicon carbide and other substances. Corundum is a trigonal crystal mineral with a melting point as high as 2050°C and a thermal expansion coefficient of 8.6*10-6K-1. It is a material with moderate to low thermal shock resistance. The hardness of corundum is 9, which is only lower than diamond and a few synthetic high-hardness minerals. Corundum products have high strength. For example, the compressive strength of alumina ceramics can reach 2000MPa, the flexural strength can reach more than 250MPa, and the hot flexural strength at 1000°C is 150MPa. Therefore, the corundum in the corundum high-strength wear-resistant refractory castable has strong resistance to wear. Corundum high-strength wear-resistant refractory castable Corundum high-strength and wear-resistant refractory castables are mainly used at
发表评论
阅读全文

High Power Graphite Electrode Ultra High Power Graphite Electrode Graphite Carburizer

-
图片
The company is mainly engaged in ordinary power graphite electrodes, graphite blocks, graphite carburizer , graphite plates, graphite crucibles, graphite squares, graphite blocks for rotary kilns, graphite burners, carbon products and various special-shaped graphites for kilns, refractory materials, etc. We rely on advanced production equipment, a strong technical force, reliable customer service and product quality, testing methods, and a strict management system to produce graphite products with various characteristics. Provide various graphite products for the chemical industry, automobile petroleum, electronics, semiconductor, steel, powder metallurgy, non-ferrous metals, rare and precious metals, aerospace, scientific experiments, and other industries. Our strict product quality management ensures that each batch of graphite electrode products can be delivered to customers in a timely manner with guaranteed quality and quantity according to the contract. Rongsheng Graphite Electro
发表评论
阅读全文