An introduction to monolithic refractories

Monolithic refractories by a certain size grading refractory aggregate and powder, binder, admixtures and become refractory materials, also known as scattered refractory materials. Monolithic refractories are used for the lining of thermal equipment. They can be baked directly without firing. Compared with firebrick, monolithic refractories have a simple process (because of eliminating the burning process), energy saving, low cost, easy to mechanized construction and other characteristics, in some thermal equipment to use the effect is better than firebrick.

Here is the content list:

• Concept

• Manufacturing methods

• Features

• Classification

• Range of application

Concept

Monolithic refractories are made up of reasonably graded granular and powdery materials and binders, which are directly used for refractories without molding and firing. Monolithic refractories without fixed shape, can be made into slurry, paste and loose, thus also known as loose refractory materials. This kind of material can be used to form integral structures without joints.

Manufacturing methods

Manufacturing monolithic refractories methods are ramming molding, vibration molding and injection molding, etc. When the masonry of the firebrick or the whole structure is partially damaged, the material can be replaced or the cold and hot repair can be carried out by spraying and projection equipment, which is both rapid and economical. It can also be used as the lining of each part of the kiln and the protective layer and joint material of masonry according to its material characteristics.

Features

1. The production process is simple, the production cycle is short and the productivity is high.

2. Strong adaptability, use is not limited by the industrial kiln structure shape, can be made into any shape.

3. Good integrity, good air tightness, large thermal resistance, can reduce the heat loss of industrial furnaces, save energy.

4. It is convenient for mechanized construction and saves labor and time.

5. lThe damaged industrial furnace lining is easy to be repaired with monolithic refractories, which prolongs the service life of the lining and reduces the consumption of refractory materials.

Classification

Monolithic refractory particles and fine powder can be composed of any material of refractory materials, and according to the raw material can be divided into: silicon refractory, clay refractory, high aluminum refractory, magnesium refractory, dolomite refractory, chromium refractory and so on. There are many types of binder, such as various cement, inorganic salts (sodium silicate, sulfate, phosphate, etc.) and organic compounds (tar asphalt, phenolic resin, etc.). You can classify and name them accordingly.

Monolithic refractories can also be divided into castable material, plastic material, ramming material, spraying material, projection material, refractory mud, refractory coating, dry mixing material, etc.

Range of application

Monolithic refractories are mainly used in the metallurgical industry. From iron ore sintering, coking, ironmaking, steelmaking, refining outside furnaces, continuous casting to steel rolling production, almost every production link of the metallurgical furnace and thermal equipment are using monolithic refractories. In addition, the blast furnace shotcrete is also made of them.

Monolithic refractories are usually only through the preparation of granular and powdery materials and the mixing process of the mixture can be made. The process is simple, the production cycle is short, the heat energy consumption is low, the use of integrity is good, the adaptability is strong, the comprehensive use effect is good.