Boiler Drive Bar All Specifications:
Material:
one kind is malleable iron grate, malleable cast iron grate piece is made of steel pouring water chestnuts after molding, in on the annealing kiln, burning 5 to 7 days, after coming out is a malleable iron grate, malleable boiler drive bar
Features:
Boiler drive bar with malleable iron grate piece is always high hardness, high temperature resistance, wear resistance, the service life of the general between 3 to 5 years.
How To Make A High-Quality Boiler Drive Bar, Grate Bar, Fire Grate bars?
Manufacturing molds, especially the manufacturing process, is a key factor affecting the quality of boiler drive bard.
The high density of molding sand castings with basic features is high clay content, the moisture content is low, the amount of the pulverized coal is low. Therefore, We grasp the following points when with sand.
(1) Clay content and silt content.
The high content of clay molding sand, as the strength than the pressure also increased usually effective control of bentonite in 7% ~ 10%. Effective and dead lump of clay in sand equivalent to the sum of silt, silt content general control in 12% ~ 16%. Silt content is too high or too low will affect the technical specifications of the sand.
(2) Water.
EPC casting manufacturing the plastic of molding sand moisture is decided to clay and the main factors of bond strength. When the moisture content is too high, easy causes deterioration of compressive force of clay, sand, less liquidity, not uniform density of mold. When the moisture content is too low, sand blender not easily, low sand strength, large brittleness, poor stripping, and apt to produce adhering sand castings defects. General moisture should be controlled in wet strength than the peak of 10% ~ 20% higher than that of water.
(3) The original grain size.
When the high density of the sand mold during molding, casting expansion, so the original grain size should not be excessive concentration, the original sand particles assumes the circular or polygonal, usually selected three-four sieve sand or sand
Between 2-3 years of service life.
Thoroughfare: chain link is mainly suitable for all kinds of boiler row above.
With 30 years of boiler drive bar experience and strict process control, we believe that we can provide you with satisfactory and qualified products.