Fibrous Refractories was the first company of its kind in Russia to start producing shell-type riser sleeves, both of a gas-pressure type with exothermal substances heating and a heat-insulating, adiabatic type, on a large-lot basis in 2008. Our products can be delivered with breaker cores to aid the process of riser removal or without them.

When in use, the riser sleeves produced by our company are highly technologically sound and will achieve the following results:

• Up to a 25-percent increase in cast yield when it comes to large-mould casting;
• Up to a 40-percent reduction in the amount of metal consumption in the process of casting;
• Decrease in machining allowances intended for the post-casting mechanical treatment of crop parts from15-20 to 4-5 mm;
• Reduction in expenditure for metal-working tools in the process of post-casting treatment;
• No necessity in the use of fire-cutting for riser removal;
• Optional accommodation of  riser over any surface without any harm to the casting configuration;
• Development in the quality of the casting process in terms of reducing the effects related to shrinkage (shells, friability, cracks) and unsolicited extraneous inclusions (gas and non-metal inclusions)
• Serial production of riser sleeves in accordance with a specific client`s needs (the shape and size of the covering, geometrical parameters of breaker cores so as to enhance the process of riser removal, heat-retaining capability, an exothermal-reaction unit, a controlled time of the delay in combustion initiation)

The exothermal mixtures we use have the following characteristics:

• Low combustion temperature;
• Stable process of burning at a controlled speed;
• The use of exothermal mixtures results in up to a twofold delay in solidification;
• Good thermal-insulation characteristics of the mixtures once the exothermal process is finished;
• Absence of the chemical interaction between the mixtures and the metal in the riser;
• Low smoke and fume;
• absence of the pyroelectric effect;
• High endurance throughout all the stages of the process;
• Absence of mechanical metal penetration;
• High gas permeability.

Fibrous refractory materials and goods are progressive products and owing to their selective properties are applied more and more in different fields of industry:

• metallurgy (ferrous, non-ferrous)
• engineering industry
• chemical industry
• oil-refining industry
• power engineering
• industry of building material
• glass industry
• consumer goods production

Area of application for materials and products for high temperature isolation

Refractory fibrous materials and goods of «Fibrous refractories», which are made according to different technologies, can be used as working or isolation layers for the following thermal units:

• gas pipe lines for ore roasting units, stoves and airways for furnace hot blowing, continuous furnaces for metal heating before flatting and isolation of pipe skids, gas furnaces for metal thermal treatment (one or three feet bell-type for rolls annealing, for rectangular permanent annealing, with roll-out floor and outer mechanization, for drivings, minings), for steel poring scoops furnaces, exhaust-heat boilers, furnaces and converters
• resistance electro furnaces for thermal treatment of products (with roll-out floor, mining kind Mine tempering resistancce), inductive smelting and heating, resistance electro furnaces for aluminum and other alloys smelting, domes for slow metal cooling
• piped heaters of different functions
• tunnel ovens for brick burning and ceramic drain pipes
• belt furnaces for burning of coated ware, thermal furnaces for burning ceramics, faience, porcelain and water-heating boilers, cogeneration steam plant lines and boilers
• reaction pipes for mounts and collectors of chemical plants, hydrogen production units
• furnaces for hot glass smelting, glaze and frit

Moreover, materials and goods can be also applied for:

thermal isolation coverings for molds and moulds, removable thermo protective «covers» for steam and gas turbine, compensating layings of working layer for wall and suspended dome lining of gas reflecting furnaces for smelting Al, jointing insertions in the permanent steel pouring units, shoots for non-ferrous metal sinking, stoppers for locking tapping holes, smelting-house bushings for non-ferrous metal sinking, different shaped products of difficult configuration, forms for accurate moulding and etc.