Refractory Products used in repairs to Glass, non-Ferrous, Steel and Foundry Refractory Processes
Zircon (Zirconium Silicate) Zr02.Si02 is a naturally occurring alluvial sand which can be refined for ceramic and refractory applications in ceramic glazes and in refractory products capable of +1800°C hot conditions.
Minchem HMP Ltd has a micronisation plant where zircon can be milled into a range of very fine powders to meet the exacting product specifications of ceramic glazes and refractory products.
Zircon refractories are equally at home combating a wide range of molten metals and slags in steel plants, ferrous and non-ferrous foundries and are particularly beneficial in contact with molten aluminium. It had been used successfully for the hearths of aluminium furnaces to melt high purity or low alloy metals. Its low wetting characteristics and high resistance makes it an ideal refractory for the ‘belly band’ above and below the metal line in secondary aluminium melting. There is also some evidence to suggest that zircon can reduce the age-old problem of corundum build up.
A Zircon Paint coating is compatible with many types of alumina/silica refractories including castables and chemically bonded ramming mixes.
Minchem HMP Ltd has developed a range of zircon refractory products as follows:
Product
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Intended Use |
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Zircon Paints Products: Zircon Paint – powder Zircon Paint – wet Coarse Zircon Paint – wet Zircon Paint 110 – wet White Zircon Paint – wet |
Excellent slag resistance and low thermal expansion properties.
Applications: This has been specially formulated to give tenacious adhesion onto refractory surfaces, brick, monolithic and fibre and also onto metals. Typical industrial use: furnaces, launders, kiln cars, batt wash, glazed or unglazed, encapsulating ceramic fibre, jointing insulation and dense refractory bricks. |
Zircon Mortars and Cements Products: Zircon A/S Mortar – dry Zircon H/S Mortar – dry Zircon Chemical Set Mortar – dry Zircon Wet Mortar Zircon Plaster – wet Zircon-Alumina Castable – low cement |
Very high refractoriness +1800°C in service.
Zircon Mortar has been specially formulated to give tenacious adhesion to refractory surfaces, brick monolithic, fibre and also onto metals. Zircon coatings are also proven in their resistance to molten aluminium. As mortar for zircon, zircon-mullite, ZAC bricks and blocks. |
Zircon Patch Products:
Zircon Patch – standard – dry Zircon Patch – standard – wet Zircon Patch Z/S 150 – dry |
Excellent resistance to alkalis and flue gases and corrosion from molten glass.
Zircon Patch is a high strength patching material for hot and cold repairs in glass tank furnaces. It is suitable for repairs to Zircon, Silica, Mullite, and Alumina in fact, any non-basic refractories. It can be used to repair crowns and superstructures in glass furnaces. Filling of expansion joint gaps where the material must be forced into the void to obtain a complete seal. Repairs to metal melting furnaces and ladles. Super 150 is high purity, high zircon mix for flat glass furnace repair. |
Zircon Rammix Products:
Zircon Rammix – Standard – dry
Zircon Rammix 150 - wet |
Excellent resistance to alkalis in flue gases and high temperature corrosion from molten glass.
Applications:
This is a specially blended product consisting mainly of zircon grades with plasticizers and a chemical bond. It can be rammed as supplied or adjusted with Zircon Bonding solution to a consistency more suitable for hand moulding and forming. Excellent performance in contact with glass and many molten metals and slags. |
Zircon Mullite Products:
Zirmul 360 A/S
Zirmul 361 H/S
Zirmul 362 Chemical Set
Zirmul Patch 160 – wet Zirmul Rammix - wet
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Combining properties of zircon with those of mullite for high refractoriness and low-wetting properties.
Applications:
A very lean Zircon/Mullite mortar to give very tight thin joints. Used with refractory bricks in glass, cement, incineration constructions etc. As mortar for zircon, zircon-mullite and ZAC bricks and blocks.
These are blended Zircon and Mullite ready-to-use mixes which combines their properties of resistance to metals and glasses and stability at high temperatures. They are ideal for linings and repairs where a quick turnaround is required. Excellent stability up to high temperatures allows for ramming, stripping and preheating to be completed so that the installation can be back into service on the same day. Typical applications include: ladle linings, launders, tundishes and nozzles, incinerator hearths where high strength and resistance to various chemical wastes are required. |
Alumina and Mullite
Products:
RSL 90 Paint – wet and dry
White Kiln Paint – wet and dry
Alumina Batt Wash – dry
Mullite Paint – dry
Mullite H/S Cement
Mullite Batt Mix – dry
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White high purity aluminas, both calcined and tabular types, +1800°C in service.
Applications: RSL 90: Applications: White Kiln Paint: This has been specially formulated to give tenacious adhesion onto refractory materials both dense and insulating operating at extreme temperatures. It also has good adhesion and stability on metal surfaces up to 600°C. It is ideal for painting kiln cars and furniture where it seals surfaces thus preventing dust particles contaminating the ware. Can be used on both biscuit and gloss, intermittent and tunnel kilns and has proved successful in conditions where extreme burner velocities are encountered. Applications: Mullite Paint: Applications: Mullite Batt Mix: Blended mullite mix for mullite kiln furniture production. |
Special Products
HC1 Cement – wet
Mag-Alumina Rammix
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Application: HC1 Cement:
Application: Mag Alumina Rammix: Steel foundry linings with a basic slag. |
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