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Furnace Grate Bar For Industrial
Ggrate is a kind of connected sintering furnace grate, its characteristic is: furnace grate strip of one side with pin, the other side of the corresponding position with pin hole, pin and pin hole is located at both ends of the grate, pin and pin hole for cylindrical pin and cylindrical pin and four prism pin, three prism pin and three prism hole, or six prism pin and six prism hole. The connected sintering grate strip, including the grate strip, is characterized by: one side of the grate strip has a pin, and the corresponding position on the other side has a pin hole. The advantage of the utility model is to make the independent furnace grate, so that the fracture grate is still fixed in the sintering stage, closely arranged the grate will not appear gap and loose, fundamentally suppressed the rest of the grate tilt off, put an end to finishing supplementary grate bar caused by the sintering machine fault shutdown. The main material of the grate is cast iron, which is iron-carbon alloy with carbon content of more than 2%. The carbon content of industrial cast iron is generally 2.5%~3.5%. Carbon exists in graphite form and sometimes in carburizing form. In addition to carbon, cast iron also contains 1%~3% silicon, as well as manganese, phosphorus, sulfur and other elements. Alloy cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements. Carbon and silicon are the main elements affecting the microorganization and performance of cast iron.
Material ingredients? The grate strip material mainly includes ash cast iron, high chromium cast iron, ordinary cast steel and high chromium nickel heat-resistant cast steel. After experimental research, the grate bar of large sintering machine has been switched to cr 25 ~ 28? Series of high chrome cast iron materials, its chemical composition mass fraction c=1.6-2.2%,si=1.0-1.4%,mn=0.7-1.0%,p<0.03%,s<0.03%,cr=25-28%,ni=0.8-1.2%. The many experimental studies by the manufacturer show that the grate strip with carbon content above 1.6% is brittle and easy to break; the nickel content of 1.2-1.45%
is better.
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