The main pollutants produced by ferroalloys are soot, waste, and waste water. The most important environmental impact is soot. According to the regulations, the exhaust gas can be divided into two categories: particulate matter exhaust gas and gaseous pollutant waste gas. The iron alloy plant waste gas is derived from the ore electric furnace, the refining electric furnace, the roasting rotary kiln, the multi-layer mechanical roasting furnace and the aluminum metal melting furnace. The iron alloy plant emits a large amount of exhaust gas, and has a high dust concentration. 90% of the exhaust gas is silica, and also contains chlorine gas, nitrogen oxides, carbon monoxide, sulfur dioxide, and the like. The waste of chromium and waste water is the most serious pollution of chromium compounds.
The State Economic and Trade Commission, the State Environmental Protection Administration and other departments are also jointly issued the "Opinions on Accelerating the Structural Adjustment of China's Ferroalloy Industry" (National Economic and Trade Industry [1999] No. 633), from 1999 to 2005, stop building new types of Ferroalloy electric furnace (kiln) and blast furnace.
At present, the national environmental protection department is introducing relevant environmental protection rules and regulations, and eliminating backward production capacity to accelerate centralized industrial management and solve the problem of pollution control.
(1) Diamond pen dressing grinding wheel: According to the size of diamond particles and their distribution in the pen, diamond pens can be divided into several types, such as chain and powder. The alloy with strong bonding force is used as the bonding agent, so the diamond grinding wheel particles are not easy to fall off during use, so there is no need to repair the grinding process.
(2) Grinding wheel dressing by rolling method: Diamond grinding wheel dressing by rolling method. Grinding wheel drives the rolling wheel at the speed of 1~2m/s by reducing the speed
Made of, carbide or abrasive) rotary. The pressure of rolling wheel applied to grinding wheel is about 3~5MPa, grinding the surface of diamond grinding wheel
Make the abrasive particles fall off. The grinding wheel dressing by rolling method has better cutting performance and lower cost, but the surface roughness of the grinding part is rougher and rolling
Damage, short life, easy loss of precision. Therefore, this dressing method is mainly used for forming grinding with small batch size and low precision.
Green silicon carbide or ceramic white corundum is used for dressing. Dressing ring is the first choice for dressing diamond grinding wheel or CBN grinding wheel. It is sharp in dressing, not easy to remove sand and has high dressing efficiency.
Wheel Dresser,Dressing Tools,Dressing Roller,Grinding Wheel Dresser
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