Sintered High Alumina Refractory Material Brick

Sintered High Alumina Refractory Material Brick

Metallurgy,Chemicals & Energy Refractory Bricks

FOB Price:US$ 900.00 / Ton(s)

MOQ:1 Ton(s)

Payment Method : T/T D/P

Keywords:Brick Refractory Material Refractory Alumina High Alumina Sintered refractories refractory brick glass furnace

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Product Category:	Metallurgy,Chemicals & Energy > Refractory Bricks	Trademark:
Product Package:		Specifications:
Place of Origin:	China	Port:	Tianjin

1. Product Name：Sintered High Alumina Series

2. Item Code：A2201/A2202/A2203/A2204

3. Product Introduction：

High Alumina Series is generally supposed to be aluminium silicate product with high content of Al₂O₃ (48%). It is batched according with a certain proportion of both aggregate and powder, and produced with high temperature combustion of more than 1350-1560℃.

In China, there are 4 kinds of high alumina products being commonly defined, according to different contents of Al₂O₃:

A2204—Al₂O₃ standard content: ≥80%;

A2203—Al₂O₃ standard content: 75% ;

A2202—Al₂O₃ standard content: 65%;

A2201—Al₂O₃ standard content: 55%.

After proper adjustments of components based on the request of use, the series can also be divided into high alumina bricks, low-creep high-alumina bricks, high refractoriness under load alumina bricks, phosphate bonded high-alumina bricks, low-expansion high-alumina bricks and other segment types.

4. Application

The series is mainly used in flues, regenerator, outside wall and other parts of glass furnace. And it can also be applied to the lining of metallurgy blast furnace, hot blast furnace, top of electric furnace , blast furnace, reverberatory furnace and rotary furnace.

5. Characteristics

High alumina series has good refractoriness, high refractoriness under load and its slag resistance is obviously improved with an increasing content of Al₂O₃. More specifically, high alumina product has following properties:

5.1 Refractoriness

High alumina product is supposed to be a high-grade refractory material. Its refractoriness (1750-1790℃) is higher than that of clay products and semi-silica products. Refractoriness is mainly influenced by contents, types and quantities of Al₂O₃. With an increasing of Al₂O₃ content as well as a decreasing of impurities content, the refractoriness will be improved.

5.2 Refractoriness Under Load

Because of a high content of Al₂O₃ with lower impurities in the series, the quantity of vitreum which can be easily melted is quite low. Therefore, its refractoriness under load is higher than that of clay series. However, its temperature of refractories under load is still lower than that of silicon series due to a lack of network structure formed by mullite crystallization.

5.3. Thermal Conductivity

Thermal conductivity of high alumina product is better than that of clay product. Because, in high alumina series, the quantity of glass phase which owns a lower thermal conductivity is very low. Besides, the increase of quantities of mullite and corundum crystal which owns good thermal conductivity obviously improves the capacity of heat transmission of high alumina series.

5.4 Thermal Shock Resistance

Thermal shock resistance of high alumina series is between that of clay and silicon. The times of water cooling cycle at 850℃ can reach to 35. The main reason is thermal expansibility of corundum is higher than mullite and no crystal can be transformed. So far, in order to improve the thermal shock resistance, it should change and improve particle structure of products, reduce content of fine powder and increase critical size as well as particle size distribution of clinkers.

5.5. Slag Resistance

High alumina series contains a good proportion of Al₂O₃ and is very close to neutral refractory materials. It can resist the corrosion of acid slag as well as alkaline slag. Due to the content of SiO₂, the resistance of alkali slag is a little weaker than that of acid slag. In addition, slag resistance of high alumina product is related to product stability in the slag. Generally speaking, products which are processed by high pressure molding and high temperature combustion will own lower porosity and higher slag resistance.

6. Physical and Chemical Indicators

Item Code			A2204	A2203	A2202	A2201
Al₂O₃	≥	%	80	75	65	55
Fe₂O₃	＜	%	2	2.5	2.5	2.6
B.D		g/cm³	2.6	2.5	2.4	2.3
C.C.S	>	MPa	80	70	60	50
R.U.L		℃	1550	1510	1460	1420
Refractoriness	>	℃	1790	1790	1770	1770
A.P	<	%	21	22	23	24
Linear Change Rate		%	-0.2	-0.3	-0.4	-0.4

We will provide the most suitable refractory product and quotation based on different customer demands. If any interest, please feel free to let us know. Looking forward to your kind enquiry.

Contact Name:	Mr Bloom Zhang	Contact Email:	hn****z@163.com
Contact Job Title:	Sales Manager	Contact Mob:	166***368
Contact Tel:		Contact Fax:
Address:		Website:	http://www.chottc.com/

Henan Oxygen Tank Technology Co., Ltd. is committed to the application and promotion of oxygen-fuel combustion technology in high-temperature industrial fields, especially in glass industry. Relying on efficient and experienced technical team, we provide customers with the overall and integrated solution of oxygen-fuel combustion technology. And around the oxygen-fuel combustion furnace, we offer whole-furnace and integrated refractory materials (Fused Cast Refractory, Sintered Refractory, Thermal Insulation Refractory and Monolithic Refractory) as well as related equipment including control valve set, furnace control system, supporting environmental protection facilities, comprehensive utilization of waste heat and tail gas treatment.

Henan Agrm Trade Co., Ltd.(AGRM), a wholly-owned subsidiary of Henan Oxygen Tank Technology Co., Ltd.(CHOTTC), is specialized in the export and import of whole-furnace refractory materials and relevant equipment in field of high temperature industrial furnace.

We have already established a professional and complete design team in offering customers all-round and total solutions. The oxygen-fuel combustion technology has been widely extended to electronic glass ceramics, high borosilicate vessel glass, high borosilicate fireproof glass, low borosilicate medical tube glass, high white material vessel glass, lead-free lamp tube, high lead glass tube, ceramic glaze, electronic material, glass bead, reflective material, water glass, decorative glass, wine bottle, glass fiber and some other glass-made product fields. The furnace space has widely developed and ranged from 0.24m2 to 179m2. The fuel available for furnace has basically included all common kinds in China, such as common pipeline natural gas, liquefied natural gas, liquefied petroleum gas, coke oven gas, rock gas, heavy oil, coal tar, light diesel oil, petroleum coke and coal powder. And we were the first and earliest to try and explore in most of those fields. Currently, we have already owned more than 40 oxygen-fuel furnaces in operation among our customers in China, Taiwan, South Korea and Japan.

With the advantage of huge-scale bases of refractory manufacture in China and rich knowledge of refractory materials and connections in related industries, we are able to offer our customers almost all kinds of refractory materials applied in oxygen-fuel combustion furnace, and develop special refractory materials according to market demands. In recent years, we have already gathered a great deal of practical experience in developing special sealing materials, thermal insulation coatings, amorphous light thermal insulation lining, burner block, electric melting thermal couple sleeve brick, mixing rod, special uniform barrel, sandwich block and three anti brick.

If the furnace is the heart of a factory, combustion equipment and control system are the key nervous system of the heart. We can provide customers control skid group and DCS system with all common fuels except coal gas, as well as matched furnace pressure control system, glass level control system, industrial television monitoring system, replaceable wear-resistant screw angle feeder, fully sealed hopper feeder, forehearth heating system (full oxygen, air), forehearth mixing system, forehearth automatic discharging system, and other relevant equipment needed in oxygen-fuel combustion furnaces.

Considering of the particularity of oxygen-fuel combustion furnace, many of factories are lack of specialized persons in furnace masonry and furnace heating aspects. We are capable to render technical guidance or construction for the whole set of construction from furnace construction, steel structure production, installation and masonry, furnace heating, feeding, hot repairing and so forth. We can truly realize a “turnkey” project for our clients.

Although the oxygen-fuel combustion technology often owns good performance in exhaust emissions, however, for some products due to raw materials, fuel, processing and other relevant reasons, exhaust emissions still need to be processed before being discharged into the atmosphere. According to the technology we mastered and the combination of advantages on tail gas treatment from IHARA(JPN), we are able to provide customers a variety of technical supports such as bag type dust removal, EP dust removal, desulfurization, defluorination and lead removal for different conditions. And we have unique insights and rich practical experience in the utilization of exhaust gas. Therefore, we can offer our clients with process design services for comprehensive utilization and treatment of exhaust gas and project implementation.

Henan Oxygen Tank Technology Co., Ltd.

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