Acid Proof Silica kiln Refractory High Compressive Strength

$China Acid Proof Silica kiln Refractory High Compressive Strength supplier$

Acid Proof Silica kiln Refractory High Compressive Strength

Brand Name:CRE

Certification:ISO9001, ISO14001, ISO50001, ISO45001

Model Number:SX

Minimum Order Quantity:10MT or 1*20GP

Delivery Time:NEGOTIABLE

Payment Terms:L/C, T/T

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yixing xinwei leeshing refractory materials co.,Ltd

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Address: Dingshu, Yixing, Jiangsu Province, PRC

Supplier`s last login times: within 1 hours

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Product Details Company Profile

Product Details

Quality Assurance High Compressive Strength Acid Proof Acid Proof Silica kiln Refractory Bricks

Silica brick is the acid refractory ,which consist mainly of tridymite, cristobalite, and a small amount of residual quartz and glass phases.

The silica content is 94% or more. It has acid slag corrosion resistance and higher high temperature strength. The load softening start temperature is 1620~1670 °C. Long-term use at high temperatures does not deform. The thermal shock stability is low (heat exchange in water for 1~4 times). This residual expansion will make the joints tight and ensure good air tightness and structural strength of the masonry.

China Rare Earth Holdings Limited ("CRE") (formerly known as Yixing Xinwei Holdings Limited) is one of the leading and well-respected rare earth and refractory products manufacturers in the Peoples' Republic of China ("PRC"). The Group has been listed on The Stock Exchange of Hong Kong Limited since 15 October 1999. It is the first Chinese private enterprise which engages in the manufacture of rare earth and refractory products listing outside the Chinese mainland.

CRE began its business in 1987 in the city of Yixing, Jiangsu Province, the PRC. Commencing operations as a rare earth separating factory, it has grown rapidly to become a recognised rare earth and refractory products manufacturer. The Group successfully obtained ISO9002 quality certification in January 1999. Its annual production capacity reaches 6,500 tonnes (REO) rare earth products and 100,000 tonnes refractory products. Fluorescent materials, polishing agents and high temperature ceramics are other major product lines of the Group.

The Group operates a rare earth separating factory and a refractory production factory. The rare earth separating factory comprises a smelting rare earth products workshop, several rare earth extraction lines and many cutting edge equipment while the refractory production factory embraces a refractory products workshop with several high-temperature tunnel kilns, light tonnage brick pressers and pre-moulded production lines. The Group believes that the high quality production facilities could produce the best rare earth and refractory products.

The industrial applications for rare earth products include high-tech electronic devices, computers, electronic motors, LCDs, DVDs, magnetic materials, magnetic memory chips, fibre optics, superconductors, mobile phone batteries, precision optics and many energy-saving environmental protection products. Refractory products are used extensively in heat-treatment facilities for petrochemical, steel metallurgy, non-ferrous metallurgy, glass, construction materials, chemical fertiliser and ceramics industries. Rare earth products of the Group are mainly exported to the United States of America, Japan, Europe and Korea, and its refractory products are mainly for domestic sales and export to Japan. Its client list includes names of international prominence, such as General Electric, Nippon Electric Glass, Siemens, Shin-et Chemical and Krosaki Harima, to name but a few.

The Group has a research and development centre that focus on improving existing products and developing new products. Building and maintaining relationships with clients and exploring new businesses are the responsibility of its talented sales and marketing department. Concerning the environmental protection as well as the market needs, the Group will continue to develop environmental friendly and high value-added products.

SK series	SK30	SK32	SK34	SK35
Al2O3	30%-35%	35%-38%	38%-42%	42%-50%
Item	33% Al2O3 fire clay brick	38% Al2O3 fire clay brick	42% Al2O3 fire clay brick	48% Al2O3 fire clay brick
Al2O3	33%	38%	42%	48%
Fe2O3/%	≤3	≤3	≤3	≤2.5
Refractoriness	≥1690 °C	≥1730 °C	≥1750 °C	≥1750 °C
Bulk density/g/cm3	1.9-2.0	2.0-2.1	2.1-2.18	2.15-2.3
Unit weight (23011465mm)	≥3.35KGS	≥3.55KGS	3.65KGS	≥3.75KGS
Apparent porosity/%	≤26	≤24	≤24	≤22
Cold crushing strength	≥20Mpa	≥25Mpa	≥30Mpa	≥35Mpa
Refractoriness under load	≥1250 °C	≥1300 °C	≥1350 °C	≥1420 °C
Reheating Linear Change/%	0~ -0.5 (1350°C,2h)	0~ -0.3 (1350°C,2h)	0~ -0.4 (1450°C,2h)	+0.1~ -0.4 (1450°C,2h)

Application of Silicon Nitride Bonded Silicon Carbide Bricks

Silicon nitride combined with silicon carbide refractory products is a high-tech refractory material developed in the past 30 years. Both silicon nitride and silicon carbide bricks are covalent bond compounds, have similar physical and chemical properties, and maintain high bond strength at high temperatures. Silicon powder evenly surrounds silicon carbide, and after high temperature nitridation reaction, a dense network structure is formed. Therefore, silicon nitride combined with silicon carbide products have a series of excellent properties such as high temperature resistance, corrosion resistance, wear resistance, erosion resistance, and oxidation resistance, and It has good resistance to all inorganic acids other than hydrofluoric acid, is not wetted by molten metal, especially non-ferrous metal, and can resist the erosion of most non-ferrous metal melts. As a refractory material, the normal use temperature can reach about 1500 ℃ in various atmospheres, and it is widely used in ceramics, non-ferrous metallurgy, iron and steel metallurgy, powder metallurgy, chemical industry and other industries.

The main preparation methods of silicon nitride combined silicon carbide products The preparation methods of silicon nitride include: direct nitridation of silicon powder, carbothermic reduction of silica, Si(NH)2 thermal decomposition, SiH4 and NH3 gas-phase reaction method. Under normal circumstances, the generation method of silicon nitride in the reaction sintered silicon nitride combined silicon carbide product is the direct nitridation method of silicon powder. At high temperature, nitrogen diffuses into the interior of the silicon powder particles and combines to form silicon nitride.

The preparation of silicon nitride combined silicon carbide products goes through seven steps: raw material processing, batching, mixing, molding, drying, nitriding firing, and product inspection. The nitriding raw materials are mainly industrial green silicon carbide and silicon powder. The raw materials are pretreated by crushing, washing and other methods. The silicon carbide sand and silicon powder are weighed according to the formula, and the silicon carbide raw materials of different particle sizes are put into the mixer as required. Dry mix, then add organic binder to warm mix, fully stir for 15-20 min, after sieving, put it into the silo for stuffy storage for 24 hours.

Company Profile

Yixing Xinwei Leeshing Refractory Material Co., Ltd

Refractory Industry is one of pillar industries in China Rare-Earth Holding Group. Beneath its 100% holding, there are two subsidiaries: Yixing Xinwei Leeshing Refractory Material Co., Ltd and Wuxi Xinwei Pan-Asia High-Temperature Ceramics Co., Ltd, professionally work on medium-to-high grade refractory material research, development, produce and project construction.

The company can produce the refractory material products of 178 product brands under eight major series, the annual production capacity is up to 100,000 tons, among them, 60,000 tons of fired products medium-to-high gradly, 20,000 tons of unfired products, 20,000 tons of unshaped refractory materials. The company enjoys the power to engage in import and export trade on its own account, the products find a good sale in Japan, Korea S., Russia, Australia, U.S.A. etc. . Company refractory exported account take advanced position in domestic.

The refractory materials produced by No.2 branch of our company mainly serve metallurgical industry at home and abroad. Since the company was set up, we have established technologically cooperative relations with Japan Krosaki Harima Corp., and mastered advanced technology about refractory material production, and we have got a great achievement in improving the quality and developing new varieties of refractory materials ,which are used in refining furnaces, pouring ladle mixers, blast-furnaces, hot-air furnaces, large lime kilns, and non-ferrous metallurgy, and products, which are made in China rather than imported, have met requirement in designing and using. For instance, we provided a series of deoxided vacuum electrical-smelted re-integrated magnesia-chrome bricks for the outside of RH furnace for Baoshan steel Co., Wuhan steel Co., Taiyuan steel Co., Ma' anshan steel Co... We supplied series of directly bonded magnesia-chrome, semi-reintegrated chrome-magnesita, electrical-smelted re-bonded magnesia-chrome cast materials ,etc. for domestic large non-ferrous metal plants, such as Guixi metallurgical plant, Tongling non-ferrous metal Co, Ltd. and Jinlong copper industry plant. And we furnished low-creep mullite series products,pre-masonry cordierite-mullite bricks, sillimanite ones, micro-porous sintered Alumina-carbon ones and cast materials for ladle body, tapping landers, slaglanders, branch landers and pre-fabricated parts for Baoshan steel Co., Ma anshan steel Co., No. 1 branch of Shanghai steel Co. and ZIMBABWE Co. which is assisted by Beijing, Jiuquan steel Co., etc. And we provided NKK AL203-SiC-C products in use for torpedo cars for Japan Nippon Steel, Japan NKK, Japan Kimitsu, Japan Oita, Japan Nisshin.

In recent years, it has cooperated with Japan's Kurosaki Harima Co., Ltd. in deep technical cooperation, and has hired Japanese experts to serve as chief engineers in the company all the year round. From raw material selection to finished product production to product packaging and transportation, all links are produced and controlled according to international standards. The company's technical solutions and process lines have been optimized, and a complete set of electrofusion recombination and semi-recombination magnesia-chrome brick production processes have been developed. , high-quality high-purity magnesia bricks and non-fired aluminum silicon carbide carbon bricks and other products have entered a large number of "Nippon Steel Co., Ltd., Steel Pipe Co., Ltd. Yawata, and Hiroko Steel Works, creating a new road for my country's refractory exports and for my country's The optimization of refractory resources has laid a certain foundation.

In addition to meeting the general needs of steel mills, the eight series of refractory products produced by our company (see the company's general sample) have also developed many special products to meet the special requirements of the metallurgical industry, and matched our leading products to provide The user implements the EPC to meet the user's needs.