Steelmaking

As a supplier of engineered products for the steelmaking industry, we offer the following:• BOF (Basic Oxygen Furnace) Refractories EAF (Electric Arc Furnace) RefractoriesArgon-Oxygen Decarburisation (AOD)

Ladle Refractories

Tundish Refractories

Copper Moulds

Bottom Pour Refractories

Degasser Refractories

Slide Gate Refractories

Others

Bottom Pour Castings

Soaking Pit Preassembly


BASIC OXYGEN FURNACE REFRACTORIES

The Basic Oxygen Furnace (BOF), is a tiltable vessel lined with refractories such as magnesia carbon brick. The main function of the BOF is to decarburise the hot metal using pure oxygen gas.



BASIC MAGNESITE BRICK Basic Magnesite Brick is a high performance refractory based on specially selected high purity seawater magnesite with additional carbon content to improve slag resistance. This quality is specifically designed for use in basic oxygen furnaces and other arduous operating environments in the steelmaking industry.


BOF REFRACTORIES


ELECTRIC ARC FURNACE REFRACTORIES

According to the heating method, electric furnace are classified as arc furnace or induction furnaces. The arc furnace is used far more extensively for steelmaking because its capacity is large and production efficiency is high.


MAGNESIA CARBON BRICK

Magnesia-Carbon Brick is resin-bonded and made with a high proportion of fused grain magnesite for very high erosion and slag resistance. It offers good oxidation resistance due to use of high purity flake graphite. Uses include Electric Arc Furnace Sidewalls, hotspots and coldspots, and ladle furnace slag lines.


MAGNESIA CARBON BRICK


MA – Magnesia Carbon Brick is formulated for extremely high wear areas in ladle slaglines. It is manufactured with very high purity, large crystal size and 2/1 lime / silica ratio Magnesia, high purity Graphite and Antioxidants.MC – Magnesia Carbon Brick is formulated for high wear areas in Ladle and Electric Arc Furnace Slaglines. It is manufactured with very high purity, extra large crystal size fused magnesia with a 2/1 lime / silica ratio Magnesia, high purity Graphite and Antioxidants.ME – Magnesia Carbon Brick is formulated for high wear areas in the electric arc furnaces and ladle slaglines. It is manufactured with very high purity, large crystal size and 100% (96 Grade) electro fused Magnesia, high purity Graphite and Antioxidants.The above data are typical properties. The data is subject to reasonable variations in manufacturing and should not be used for specification purposes.

ARGON-OXYGEN DECARBURISATION (AOD) AND FIRED MAGNESIA / DOLOMITE REFRACTORIES

More than 30 years ago, most AOD Linings were constructed with Magnesia Chrome refractories. Over time the AOD linings were switched to Fired Dolomite and Fired Magnesia Enriched Dolomite. Today, virtually all AOD Linings are now constructed with these refractories.

The switch to Fired Dolomite and Fired Magnesia Enriched Dolomite has reduced refractory cost and improved Stainless Steel quality. After AOD operators switched from Magnesia Chrome refractories to Dolomite refractories, AOD Lining designs have evolved over the years, as well. Now, many lining design use three grades of dolomite; resin bonded, fired dolomite and fired magnesia enriched dolomite. Linings are also zoned by thickness.

Computer-Controlled Firing and Mixing

AOD operators have been working to extend lining life. As such, Magnesia Enriched Dolomite was placed in the high wear areas of the Lining. Slaglines and Tuyere pads have been upgraded as well as certain sidewall areas.About 8 to 10 years ago, the Chinese refractory industry began to export to industrialized nations around the world. One of the refractory products that was exported was Fired Magnesia Dolomite. Initially, Magnesia Dolomite was only exported from China to the Asian market primarily to Japan and Korea. Performance was very promising.Over the last several years, Chinese Refractory companies began to look outside the Asian market to Europe and North America. Three years ago McKeown International came to an agreement with a major Chinese Refractory Manufacturer of Fired Magnesia Dolomite to market the product in Europe and North America.McKeown is involved in all phases of the production, quality control and marketing. The Fired Magnesia Dolomite is made to very stringent McKeown specifications. The specifications include physical properties, chemical analysis, sizing ranges and packaging.
McKeown also maintains two permanent offices in China. These offices are staffed with five full-time engineers. The primary duty of the McKeown China office is to provide quality control supervision in the manufacturer’s plant including in process and final inspection. McKeown engineers must approve and sign off on every order before shipment. Periodically, McKeown engineers send product samples to an independent laboratory to confirm the manufacturer’s data.

ULTRADOL FIRED MAGNESIA / DOLOMITE BRICK

McKeown Ultradol Brick is manufactured from naturally occurring high Magnesia Dolomite grain. It is fired at high temperature to form a very low porosity and extremely high density brick. Ultradol is uniquely suited for use in the high wear areas of stainless converters and AODs. It is also well suited for use in the high wear areas of ladle slaglines in steel plants making silicon deoxidized sheets.

Ultradol for AOD


LADLE REFRACTORIES  Mckeown International Group  offers a wide range  of refractory and other engineered products, such as purging plugs and precast shapes, for ladel application.

A well balanced ladel lining can be designed with these products to accommodate the different operating and slag practices for an optimal ladel performance.

 

Typical Ladle


Magnesia Alumina Carbon BrickJLMAC – Magnesia Alumina Carbon Brick is formulated for ladle linings. It is manufactured with very high purity electro-fused Magnesia, high purity Graphite, Alumina and Antioxidants.MAMC – Alumina Magnesia Carbon Bricks are used in Ladle Sidewall and Bottom impact areas. It is formulated with very high purity Alumina and Magnesia.

Magnesia Carbon Brick Magnesia Carbon Brick is resin-bonded and made with a high proportion of fused grain magnesite for very high erosion and slag resistance. It offers good oxidation resistance due to use of high purity flake graphite. Uses include Electric Arc Furnace sidewalls, hotspots and coldspots, and ladle furnace slag lines.
MA – Magnesia Carbon Brick is formulated for extremely high wear areas in ladle slaglines. It is manufactured with very high purity, large crystal size and 2/1 lime / silica ratio Magnesia, high purity Graphite and Antioxidants.MC – Magnesia Carbon Brick is formulated for high wear areas in Ladle and Electric Arc Furnace Slaglines. It is manufactured with very high purity, extra large crystal size fused magnesia with a 2/1 lime / silica ratio, high purity Graphite and Antioxidants.ME – Magnesia Carbon Brick is formulated for high wear areas in the electric arc furnaces and ladle slaglines. It is manufactured with very high purity, large crystal size and 100% (96 Grade) electro-fused Magnesia, high purity Graphite and Antioxidants.
High Alumina BrickHigh Alumina refractories are made from high quality bauxite and corundum with very low impurity content. They offer great strength at high temperatures and excellent resistance to abrasion, mechanical wear, slag corrosion, metal penetration and attacks of various fluxes.