Insulation and Refractories

refractories manufacturer in malaysia
Insulation and Refractories: RRMSB

Thermal insulators are poor conductors of heat and have low thermal conductivity. Insulation materials are used in buildings and manufacturing processes to prevent heat gain or loss. Although its main purpose is economy, it also provides more precise process temperature control and personnel protection. Prevent condensation on cold surfaces and the resulting corrosion. These materials are porous and contain a large number of inactive air pockets. Thermal insulation has the following advantages:

• Reduce total energy consumption

• Provide better process control by maintaining process temperature.

• Prevent corrosion by keeping the exposed surface of the cooling system above the dew point

• Provide fire protection for equipment

• Absorb vibration

Types and applications Insulating materials can be divided into three groups according to the temperature range in which they are used.

Insulated refractory brick (IRB) is a term used for insulating bricks, covering insulation materials that are applied to 1000 degrees Celsius. IRB is often incorrectly referred to as back insulation. These bricks belong to the group of lightweight refractory bricks and are manufactured on the basis of lightweight raw materials from natural sources.

IRB was developed in the 1930s and is an important insulating material in the development of refractory materials and insulating castings. The bricks are based on (i) clay bricks and gypsum bricks, which use carbon shavings to create high porosity (and therefore improve insulation), and (ii) clay and lightweight aggregates, and there are two types of bricks. Like all aluminum oxide silicate stones, IRB has a service class (limited service). The various types of IRB are mainly composed of traditional materials such as diatomaceous earth, perlite, expanded vermiculite, calcium silicate, fire, kaolin, quartz, alumina and refractory aggregate. Various types of porous structures such as saws, expanded polystyrene, fine coke, binders, organic foams or granular materials such as hollow microspheres and cellular alumina are commonly used in IRBs to obtain low-density porous materials.

IRBs are characterized by high porosity (45–90%). Skin pores are usually clogged pores. Due to their porous structure, these rocks have low values ​​of thermal conductivity. Thermal conductivity depends not only on overall porosity, but also on the size and shape of the pores and the composition of chemicals and minerals. The heat capacity of bricks is also low. Due to the high porosity of this rock, its density and bulk strength are low. The use of this type of brick depends on the temperature component. For example, a kite-based insulating block can be used at temperatures above 1250 °C, while refractory materials can be used at lower temperatures.

IRBs are vulnerable to alkaline attacks. Fly gypsum and sawdust products (high in CaO content) can swell under alkaline conditions. In some cases, this reaction is harmful and shortens lifespan. Conversely, IRB optical aggregates can illuminate surfaces in alkaline environments.

This article was originally published on



Brandsandu Is A Complete 360 ° Branding & Digital Marketing Company In Delhi Ncr Providing A Complete Solution From Branding To Social Media

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store

Brandsandu Is A Complete 360 ° Branding & Digital Marketing Company In Delhi Ncr Providing A Complete Solution From Branding To Social Media