Alumina Bricks - Refractory Material

By Author: Vivek Singh
Total Articles: 2
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Calderys is a globally leading manufacturer of refractory that provides customized refractory solutions such as Shaped & unshaped refractory of both dense and insulation, Ready Shape blocks (PCPF blocks), high alumina cement, isostatically pressed continuous casting refractories and many similar products to widely diversified industries which include Iron & Steelmaking, Cement, Petrochemicals, Boilers & Incinerators, Foundry, Aluminium, DRI, etc.

To make the shopping experience more convenient Calderys have developed 'Caldezone', their very own online portal with all their products so the clients can check their specifications, get the best price and buy refractory products online according to their requirement.

Alumina Bricks are a multi-industrial refractory product that is produced with select bauxite chamotte as the main raw material, formed with an advanced process with strict quality control. These bricks are used in all kinds of industrial furnaces and high-temperature areas to enhance the productivity of furnaces.

Petrochemical & Refinery Industry

Petrochemicals are procured ...
... from various chemical compounds, mainly hydrocarbons. These chemical compounds are derived from crude oil and natural gas. There are various fractions produced by the distillation of crude oil. Among which petroleum gases, naphtha, gas oil, and kerosene are the main feedstocks for the petrochemical industry.

Petrochemicals play a vital role in directing our basic needs in the fields of food and water security, shelter, clothing and textiles, health care, social and physical infrastructure, information, communication and entertainment, directly & indirectly.

Usage of Alumina bricks in Petrochemical Industry
The main parts of the furnace are the control system-thermostat and electrical controls, the gas valve, burners, heat exchanger, blower, and duct and ventilation system. These furnaces are required to be built in a way that they should retain the produced heat as much as possible. Here comes the role of refractories, Alumina bricks.

Get the best Alumina bricks for Petrochemical Industry on Calderys' Caldezone
AC BW are medium alumina bricks with standard and customized dimensions. These have the basic application at the fired heaters-bridge wall area. These refractory bricks have a high density, high purity, high strength and high chemical inertness towards alkali attack.
AC RF are medium alumina bricks with standard and customized dimensions. These have a basic application in the radiant floor area and fire heaters floor. These special fireclay bricks are manufactured by using special grade refractory materials of various particle sizes and have optimum strength, volume stability at operating temperature, chemically inert, thermal spalling resistance with excellent refractoriness.
AC HP are high alumina bricks with standard and customized dimensions. These have a basic application in the SRU-reaction chamber main cylinder-Hot Face. These low iron and special dense high alumina refractory bricks have high chemical purity, high Hot load strength and controlled porosity and are designed for service temperature up to 1700 deg C.

Cement Industry
India ranks second in terms of the world's largest producer of cement. There is a huge potential for development in the infrastructure and construction sector in India. Being one of the most essential requirements of every project in this industry, quality cement will always have higher demands in the market.
Cement manufacturing is a complex process. It begins with mining, grinding raw materials which are then heated to a sintering temperature as high as more than a thousand degrees Celsius in a cement kiln.
Usage of Alumina bricks in the Cement Industry
The cement kiln, which is a thermally insulated chamber, a type of huge oven, requires to produce temperatures sufficient to complete the processes such as hardening, drying, or chemical changes. These kilns are required to be built in a way that they should retain the produced heat as much as possible. For this purpose, refractory alumina bricks are used.

Get the best Alumina bricks for Cement Industry on Calderys' Caldezone
AC 40 are medium alumina bricks with standard and customized dimensions. These have a basic application in the Preheating Zone. These bricks are manufactured in the high precision press and fired at extremely controlled and high precision kilns. They have optimum strength, medium temperature abrasion resistance and high thermal stability. Other applications of this product are in Non Ferrous-lead, Aluminium-as back and Hot face and other metallurgical industry, boilers and waste incinerators, foundry ladle back up lining, pizza oven and general purpose oven and baking furnace.
AC 30 are alumina bricks with standard and customized dimensions. These have a basic application in the upper cyclones-riser ducts. These bricks are produced with quality raw materials in the high-precision press and fired in extremely controlled and precision kilns. These are excellent back up lining materials for foundry ladle, tundish back up. They have optimum strength, medium temperature abrasion resistance and high thermal stability to be used in other areas such as non ferrous-lead, aluminium-as back and hot face and other metallurgical industries, boilers and waste incinerators, foundry ladle-back up lining and pizza oven.

Power-Waste-to-Energy (WtE)

WtE, Waste to Energy technologies that process non-renewable waste to produce sustainable energy while reducing the environmental & health damages can be classified into municipal solid waste, process waste, medical waste, & agricultural Waste. WtE technology is an energy recovery process that converts chemicals from waste residues into practical forms of energy like electricity, heat or steam. The thermal conversion techniques lead the market among all the WtE technologies.

Usage of Alumina bricks in the Power-Waste-to-Energy (WtE) industry

A steam power plant consists of a boiler, steam turbine, generator, and other auxiliaries require to generate steam at high pressure and high temperature. The steam turbine converts the heat energy of steam into mechanical energy and then the generator converts the mechanical energy into electric power. For this process to be completed smoothly the boiler has to be built to hold the high temperature, which is made possible with the help of alumina refractory bricks.

Get the best Alumina bricks for Power-Waste-to-Energy (WtE) Industry on Calderys' Caldezone
AC 60 are medium alumina bricks with standard and customized dimensions. These have a basic application in the Secondary Cooling Chambers. These medium density, low porosity bricks are manufactured in the high precision press and fired in extremely controlled and high precision tunnel kilns. These refractory bricks have high refractoriness, high strength, good abrasion resistance, and high thermal stability to be used in other areas such as non ferrous-lead, aluminium-as back and hot face and other metallurgical industries, cement, boilers and waste incinerators, foundry ladle-back up lining and pizza oven and general purpose oven and baking furnace.

Steel Making
Steelmaking consists primarily of a two-step process. In the primary steelmaking step, liquid iron is converted into steel by the basic oxygen furnace (BOF) process, or by melting scrap steel or direct reduced iron (DRI) in an electric arc furnace. Secondary steelmaking is a refining process in which impurities such as sulfur, phosphorus, and excess carbon are removed from the raw iron, and alloying elements such as manganese, nickel, chromium, and vanadium are added to produce the steel required.

Usage of Alumina bricks in the Steel Making industry
Steel is primarily produced using one of two methods, a blast furnace or an electric arc furnace. The modern steelmaking process also requires good quality furnaces to keep the high temperatures. Alumina bricks are an excellent refractory solution to built quality furnaces.

Get the best Alumina bricks for the Steel Making industry on Calderys' Caldezone
AC 70 are high alumina bricks with standard and customized dimensions. It is being used as a backup layer in the furnace refractory lining. These bricks are manufactured in the high precision press and fired in extremely controlled and high precision tunnel kilns. These refractory bricks have high refractoriness, high strength, good abrasion resistance, high thermal stability and optimum load bearing capacity to be used in other areas such as non ferrous-lead, aluminium-as back and hot face and other metallurgical industries, cement, boilers and waste incinerators, foundry ladle-back up lining and pizza oven and general purpose oven and baking furnace.

Iron Making
Iron is one of the key industries in the Indian economy. We have been making iron for centuries. It has been the fuel to the industrial revolution of modern industrialized economies. Be it construction, vehicles, engines or machines, iron is the basic requirement in everything.

Usage of Alumina bricks in the Iron Making industry
In the blast furnace where the iron ore is mixed with coke and heated to form an iron-rich clinker, a very high level of temperature is required in the complete process. This blast furnace is required to be built with the best refractory solutions. Aluminium bricks are one of the most important parts of these blast furnaces.

Get the best Alumina bricks for the Iron Making industry on Calderys' Caldezone
AC 70 M is a mullite-based brick that is being manufactured in the high precision press and fired in extremely controlled and high precision tunnel kilns. These refractory bricks are being used as backup layer of blast furnace due to its high refractoriness, high MOR, high strength, good abrasion resistance, high thermal stability and optimum load-bearing capacity

Reheating Furnace
Reheating furnaces are used in many industries where their classification is based on the method of heating, method of charging the reheating furnace, the movement of steel stock in the reheating furnace, the heat recovery methods.

Usage of Alumina bricks in the Reheating Furnace industry
The reheating furnaces that are used in hot rolling mills is a continuous process where feedstock is charged at the furnace entrance, heated in the furnace, and discharged at the furnace exit to get the required product. For the high level of combustion optimization, high refractoriness is required in the furnace. The alumina bricks provide the best refractory solution for blast furnaces.

Get the best Alumina bricks for the Reheating Furnace industry on Calderys' Caldezone
AC 60 are medium alumina bricks with standard and customized dimensions. These medium density, low porosity bricks are manufactured in the high precision press and fired in extremely controlled and high precision tunnel kilns. These refractory bricks have high refractoriness, high strength, good abrasion resistance, and high thermal stability to be used in other areas such as non ferrous-lead, aluminium-as back and hot face and other metallurgical industries, cement, boilers and waste incinerators, foundry ladle-back up lining and pizza oven and general purpose oven and baking furnace.

Aluminium
Aluminium is the second most used metal in the world after steel. It is also the fastest growing metal in terms of usage. India is the fourth largest producer of aluminium in the world contributing a significant quantum of aluminium in the global market.

Usage of Alumina bricks in the Aluminium industry
To extract the alumina, or aluminium oxide from the bauxite through refining, the alumina mixture requires to be calcined first in a kiln or furnace. Alumina bricks work as the best refractory product for these furnaces.

Get the best Alumina bricks for the Aluminium industry on Calderys' Caldezone
AC 70 are high alumina bricks that are commonly used in the furnace which can be supplied in standard and customized dimensions. These refractory bricks have high refractoriness, high strength, good abrasion resistance, high thermal stability and optimum load-bearing capacity which helps in better life of the refractory for alumina furnace.
AC 85 P is a phosphate bonded brick that is commonly used in Aluminum Melting and holding furnaces. Due to the non-wettability nature and high MOR value, these bricks are most suitable for the melting holding furnace hearth and bottom lower wall lining.

Calderys is a wholly-owned subsidiary of Imerys, the world leader in mineral-based specialities for industry. For any type of Refractory solutions requirement, you can visit their online product library

on http://www.caldezone.com/
or contact the company's corporate office at:

Calderys India Refractories Ltd
6th Floor, Fidvi Tower, Opp. Saraf
Chambers, Mount Road, Sadar, Nagpur -440001, Maharashtra, India
Telephone 0712 - 2811600 / 7391052888
Email ID: caldezone.india@calderys.com