Use of ramming mass

2024-06-18 09:25:46
Ramming mass is a refractory material used in high temperature environment. It is widely used in high temperature furnace lining construction in metallurgy, building materials, chemical industry, power industry and other industries. Its main components are refractory aggregate, binder and admixture. Through ramming construction, it forms a dense refractory layer during use, which has excellent high temperature resistance, corrosion resistance, thermal shock resistance and other properties. The following is a detailed introduction to ramming mass.

1. Classification of ramming mass

Classification according to main components

Clay ramming mass: The main component is aluminosilicate, suitable for furnace linings with temperatures not exceeding 1400℃.

High alumina ramming mass: The main component is high alumina oxide, suitable for furnace linings with temperatures between 1400℃ and 1600℃.

Silica ramming mass: The main component is silicon dioxide, suitable for furnace linings with temperatures above 1600℃.

Magnesium ramming mass: The main component is magnesium oxide, suitable for medium and high temperature furnace linings in steel smelting.

Classification according to binder type

Water glass bonded ramming mass: Using water glass as a binder, it is suitable for medium and low temperature furnace linings.
Phosphoric acid-bound ramming material: phosphoric acid and its salts are used as binders, suitable for medium and high temperature furnace linings.
Resin-bound ramming material: resin is used as a binder, with good wear resistance and strength.
2. Raw material composition of ramming material
Refractory aggregate: usually sintered or fused high-purity materials, such as high-alumina bauxite, bauxite clinker, silica, magnesia, etc.
Binder: commonly used are water glass, phosphoric acid, phosphate, resin, etc.
Admixture: including promoters, stabilizers, plasticizers, etc., used to improve the construction performance and use performance of ramming materials.
3. Performance characteristics of ramming materials
High temperature resistance: can be used for a long time in high temperature environment, not easy to soften or melt.
Corrosion resistance: has good resistance to high temperature molten materials and gases, and prolongs the service life of the furnace lining.
Thermal shock resistance: can withstand the thermal stress of rapid cooling and heating, and is not easy to crack or peel off.
Convenient construction: the ramming construction process is simple, can be quickly formed and adapted to complex furnace structures.
High mechanical strength: The material after ramming has high density and high compressive and flexural strength.
IV. Application of ramming materials
Ramming materials are widely used in the following fields:

Steel smelting: linings of blast furnaces, hot blast furnaces, converters, electric arc furnaces, iron outlet grooves, steel outlet grooves and other parts.
Nonferrous metal smelting: linings of aluminum electrolytic cells, copper smelting furnaces, lead smelting furnaces and other furnaces.
Building materials industry: linings of high-temperature equipment such as cement rotary kilns and glass kilns.
Chemical industry: linings of various high-temperature reactors and gasifiers.
Power industry: boiler linings and ash treatment systems of coal-fired power plants.
V. Construction process of ramming materials
The construction process of ramming materials mainly includes the following steps:

Material preparation: prepare ramming materials and required tools according to the ratio.
Mixing: Mix refractory aggregates, binders and admixtures in proportion.
Ramming: Fill the mixed ramming materials into the construction site in layers, with each layer not exceeding 100mm thick, and tamp them layer by layer with ramming tools.
Maintenance: After the ramming construction is completed, the corresponding maintenance is carried out according to the type of binder. For example, the water glass bonded ramming material needs to be naturally cured for 24 hours before heating and drying.
6. Development trend of ramming materials
With the development of high-temperature industry, the performance requirements for ramming materials are getting higher and higher. The development trends of ramming materials in the future mainly include:

High purification: Use high-purity raw materials to reduce the impurity content and improve the high temperature resistance and corrosion resistance of ramming materials.
Low carbonization: Develop low-carbon and carbon-free ramming materials to reduce the impact of carbon oxidation on ramming materials and extend service life.
High efficiency: Improve the construction efficiency and use effect of ramming materials by optimizing the formula and construction process.
Environmental protection: Use environmentally friendly binders and admixtures to reduce environmental pollution during construction and use.
In short, ramming materials, as an important refractory material, play an irreplaceable role in high-temperature industry. With the advancement of science and technology and changes in industrial needs, the performance and application fields of ramming materials will continue to expand, providing reliable guarantees for the safe operation of high-temperature equipment.
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