Introduction:
Refractory products with alumina content greater than 75% and corundum as the main crystal phase. Very high normal temperature compressive strength (up to 340MPa). High load softening start temperature (more than 1700°C). Very good chemical stability, strong resistance to acidic or alkaline slag, metal and glass liquid. Thermal shock stability is related to its structure.

The corrosion resistance of compact products is good, but thermal shock stability is poor. There are two types of sintered corundum bricks and fused corundum bricks.

Sintered alumina and fused corundum can be used as raw materials, or bauxite clinker with high Al2O3/SiO2 ratio can be combined with sintered alumina and made by sintering method. Phosphoric acid or other binders can also be used to make non-fired corundum bricks.

Load softening temperature
Since the high aluminum has a high Al2O3 content, a low impurity content, and a low formation of the molten glass body, the fire-resistant softening temperature is higher than that of the refractory clay brick. However, since the mullite crystal has not yet formed a network structure, the load softening temperature is lower than the load softening temperature of the silica brick.

Advantage:

1.High load softening start temperature

2.Very good chemical stability

3. strong resistance to acidic or alkaline slag

Applocation:

Mainly used in iron-making blast furnaces and blast furnace hot-blast furnaces, refining furnaces outside steel-making furnaces, sliding water heaters, glass melting furnaces, and petrochemical industrial furnaces

Used in the iron and steel industry, the service life of chromium corundum material is more than double that of corundum material, such as ladle breathable bricks, etc.; used in the non-ferrous smelting industry, the wear resistance and erosion resistance of corundum bricks are significantly better than other brick types; In the black industry, using corundum bricks doubles the life span of corundum bricks used under the same conditions. The AK-type chromium corundum brick produced is used in the carbon black reactor of the carbon black factory, and the service life has exceeded the corundum brick.
In the petrochemical industry, due to long-term high temperature (1350 ～ 1450 ℃), high pressure (3.1 ～8.53 MPa), strong reducing atmosphere (CO + H2 + CH4) and gas flow velocity in the gasifier of large and medium fertilizer plants Large (about 10 m·s-1), the corrosion and damage to the furnace lining refractories are serious, so the requirements for the furnace lining refractories are higher. High-performance corundum bricks have high density and strength, and are more resistant to air flow and wear resistance than corundum bricks. The introduction of Cr2O3 into the corundum bricks changes the internal quality of the products, and significantly improves the resistance to slag erosion and permeability of the bricks. The use of corundum bricks in the gasifier can increase the service life of the gasifier

Packaging and shipping

Standard packing: waterproof inner packing + outer packing suitable for container transportation

    Zhengzhou ANNEC Industrial CO., Ltd. was founded at Sep, 2003, and has been a NASDAQ listed corporation since 2011(Stock code: ANNC). ANNEC had become refractory industrial leader provide core service such as refractory production, technology of blast furnace and hot blast stove and EPC contract project in China. Now ANNEC sets up Academician workstations, the Provincial Engineering and Technology Center, Hot Blast Stove Research Centre, ANNEC (Beijing) Engineering Technology Co., Ltd and four production sites as subsidiaries. Yearly refractory output is 150 kt.

    ANNEC is a national hi-tech company, and is accredited with ISO9001:2008 quality control system standards, ISO12001:2004 environmental control system standards, and GB/T28001-2011 HAZOPS. ANNEC has set up a thorough and effective management system with practical considerations for her employees and community, and is persistent in promoting employee self-value and product products. Based on the efforts, ANNEC is the recipient of the prestigious 2012 Zhengzhou Mayor Quality Prize.

ANNEC has capability of manufacturing refractories materials of fireclay, high alumina, silica and insulating bricks and corresponding unshaped refractories for hot blast stove. Meanwhile, ANNEC also produce various refractories for coking, sintering, casting house, torpedoes, iron ladles and steel ladles. ANNEC’s products have been sold to America, Japan, Korea, India, Iran, Vietnam, Turkey, Malaysia and Indonesia; get the customer's endorsement in the domestic and world. At the same time, ANNEC’s testing center shoulder examinations of products quality and tests of new product development.

    ANNEC has been providing matched refractories of different type HBS for CERI, CISDI, WISDRI, CSGI and Kalugin，P•W，Danieli and SIEMENS VAI in their worldwide projects. ANNEC is awarded as excellent supplier by Baosteel, CSGI, and MCC etc.

ANNEC owns more than 50 patent technologies which include checker bricks with19 holes; 37 holes, 61 holes, ceramic burner of swirl-cutting top combustion hot blast stove, cone-column composited ceramic burner for top combustion hot blast stove, symmetric layout structure of hot blast stove, three section hot blast stove with independent structural. ANNEC was authorized to fulfill editing 7 standards of national and of industrial, including 《Silica Brick》, 《High Alumina Brick》， 《Refractory Brick for HBS Ceramic Burner》,《Refractory Standard Configuration of HBS System 》 and 《Energy Saving Technical Specification of Top Combustion HBS》.

    ANNEC successively get awards such as “Chinese Outstanding S&T Innovation Enterprise”、“AAA grade Credit Enterprise”“Chinese Famous Brand Trademark China” “Provincial Famous-brand Product, Henan”“Provincial Credit Enterprise, Henan” “Zhengzhou Environmental Enterprise”

    ANNEC owns core culture which is to make customer satisfaction, staff satisfaction and shareholder satisfaction; and continuously push forward technological development of HBS and progress of refractory technology by its great efforts, and gradually becomes one of the best professional suppliers in high temperature industry of global