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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. 


Minchem HMP Ltd is both a supplier to the refractory manufacturers and also produces its own range of refractory products for sale to stockists and to end users.


Zircon has a good resistance to alkalis in flue gases and corrosion from molten glass. 


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:


Intended Use


Zircon Paints


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.



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


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.

A range of mortars for jointing refractory brick constructions in furnaces for manufacture of glass and non-ferrous metals production. Particularly beneficial in contact with molten aluminium.

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



Zircon Patch – standard – dry

Zircon Patch – standard – wet

Zircon Patch Z/S 150 – dry

Zircon Patch Z/S 150 – wet
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



Zircon Rammix – Standard – dry


Zircon Rammix 150 - wet

Excellent resistance to alkalis in flue gases and high temperature corrosion from molten glass.



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



Zirmul 360 A/S


Zirmul 361 H/S


Zirmul 362 Chemical Set



Zirmul Patch 160 – wet

Zirmul Rammix - wet
Combining properties of zircon with those of mullite for high refractoriness and low-wetting properties.


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




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
White high purity aluminas, both calcined and tabular types, +1800°C in service.

Grey mullite mortars and coatings used in thermal shock conditions requiring rapid heating and cooling.

Applications: RSL 90:
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. This makes RSL90 ideal for coating iron and steel launders and ladles.

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:
This has been specially formulated to give tenacious adhesion onto refractory surfaces, brick, monolithic and fibre. Mullite coatings are proven low wetting surfaces and after firing are resistant to most acids and alkalis. They are particularly resistant to vanadium pentoxide, a very destructive chemical in oil fired residues.

Applications: Mullite Batt Mix:

Blended mullite mix for mullite kiln furniture production.

Special Products

HC1 Cement – wet




Mag-Alumina Rammix
Application: HC1 Cement:

This can be used very effectively as an in situ gasket or buffer layer when applied as a plaster between various materials e.g. ceramic fibre to refractory concrete, metal casing to insulation bricks.

Application: Mag Alumina Rammix:

Steel foundry linings with a basic slag.