What are the classification methods for lightweight insulation castables?

Castables are mainly classified according to porosity, binders and aggregate varieties. In actual use, it is often classified according to the use temperature or functional characteristics.

 

According to the porosity, there are two kinds of dense casting material and thermal insulation burning material with porosity not less than 45%.

 

According to the bonding agent, there are hydraulic, chemical, and cohesive bonding castables.

 

Hydraulically settable castables set and harden at room temperature and harden by hydration. The main varieties are Portland cement, ordinary calcium aluminate cement, pure calcium aluminate cement, and fused pure calcium aluminate cement castables. The chemical bonding castables are generally hardened by adding a hardening agent to form a chemical reaction at room temperature. The main varieties are water glass, aluminum sulfate, and phosphate castables. Cohesion-bonded castables are hardened by sintering during calcination. The main varieties are clay castables.

According to refractory aggregates, there are clay aggregates (Al2O3 30% ～ 45%), high alumina aggregates (Al2O3% 26ge; 45%), siliceous aggregates (SiO2% 26ge; 85%, Al2O3% 26lt; 10 %), Alkaline aggregates (magnesia, dolomite, etc.), special aggregates (carbon, carbide, spinel, zircon, nitride, etc.) and thermal insulation aggregates (perlite, leech, etc.) Stone, ceramsite, floating beads, light brick sand, porous clinker, hollow alumina ball, etc.).

 

In actual use, according to engineering requirements, certain mixed aggregate carbon fiber casting integrated sucker rod centralizers are allowed, which belong to oilfield production accessories, including carbon fiber centralizers, oil rods, carbon fiber centralizers and sucker rods. Pouring into one. The utility model directly casts the carbon fiber centralizing body on the sucker rod at one time, which saves the original method of passing through the media pieces, and also saves the time for the worker to repeatedly install the traditional centralizer when going down the site. High, while reducing the cumbersome parts, manufacturing and installation are very convenient, and light weight, low cost, wear resistance is 1.8 times the traditional centralizer, improve the workover cycle, save maintenance costs.