The concept of mullite

Mullite (or Mok Stone) is composed of a series of aluminum silicate minerals collectively, this type of mineral relatively scarce. Mullite is an aluminum silicate mineral is generated at high temperatures, the formation of the artificial heat aluminosilicate mullite. Natural mullite crystals elongated needles and showed radiation clusters. Mo quarry was used to produce high-temperature refractories. In the C / C composites and more as the heat rose coatings widely used.

Introduction to basic refractories

Basic refractories to CaO, MgO refractory alkaline earth oxides as the main ingredient. Usually refers to the magnesia refractories, refractory and calcareous dolomitic refractories.
Mainly in the following categories:
(1) strongly alkaline brick, magnesium carbon brick, brick and lime dolomite refractory;
(2) alkaline chrome magnesia refractories, refractory forsterite and magnesium aluminum, magnesium and chromium spinel refractories.
Basic refractories for basic slag at high temperatures, resistance to strong alkaline flux, but the acidic slag, refractory acid or acid flux from a chemical reaction. Mainly used in steel-making furnaces and basic non-ferrous metal smelting furnaces and cement kilns.

Refractory performance

Physical properties of refractories include structural properties, thermal properties, mechanical properties, performance and job performance.
Structural performance refractories include porosity, bulk density, water absorption, air permeability, pore size distribution.
Refractory thermal properties including thermal conductivity, thermal expansion coefficient, specific heat, heat capacity, the thermal diffusivity, the thermal emission rate.
Mechanical properties include compressive strength of the refractory, tensile strength, flexural strength, torsional strength, shear strength, impact strength, abrasion resistance, creep resistance, bond strength, elastic modulus.
Performance refractories include refractoriness, RUL, heavy firing line changes, thermal shock resistance, slag resistance, acid resistance, alkali resistance, resistance to water resistance, corrosion resistance to CO, conductivity, oxidation resistance and so on.

The concept of refractories

Refractoriness of not less than 1580 ℃ in a class of inorganic non-metallic materials. Refractoriness is the refractory cone specimen in the absence of load cases, resistance to high temperature without melting down the softening temperature in Celsius. Refractory materials are widely used in metallurgy industry, chemical industry, petroleum, machinery manufacturing, silicates, power, etc., the largest amount in the metallurgical industry, accounting for 50% to 60% of total production.

Brown corundum material

Corundum high quality bauxite as raw material, anthracite, iron Xiao, in the arc by ? ? ? ? degrees above the melting temperature is made by crushing ? plastic from the mill, magnetic separation to iron, screening a variety of granularity, which dense texture, high hardness, formation of spherical particles, for the manufacture of pottery ? porcelain, resin, high abrasive grinding, polishing, sandblasting, precision casting, etc., can also be used to manufacture advanced refractories. Main component is alumina corundum, graded to distinguish it from aluminum content, the lower aluminum content will lower the hardness of it.

CBN abrasive grit,alluvial garnet gbrasives,waterjet abrasives

Development and application of silicon carbide refractories in the development and application of power station boiler in the material circulating fluidized bed boiler has good abrasion resistance, thermal shock resistance, dimensional stability and strength, thermal performance is also very good. Chucierwai, the material also has good performance, such as site preparation is simple, fast growth in strength, ease of construction and subsequent strong bond with the metal components and so on. Can be used in circulating fluidized bed boiler combustion chamber liner and a separate entrance to the high temperature and so on.
 Application and development of its high thermal conductivity silicon carbide refractories, high temperature, thermal shock and hardly reacts with the molten slag and other features on a regular boiler, are often used to guard fired with pulverized coal in general