The design of the sand making machine technological process should use the dry production process which relatively have little influence on the environment at the premise of meeting the concrete aggregate technical requirements. Using wet production process must take reasonable wastewater treatment process for the comprehensive utilization of waste water, waste residue, waste to treasure, and minimize the waste disposal to meet demands of environmental protection. In the process of mining, processing, it is easy to bring damage and harm to the environment and human life environmental, which include the damage on vegetation and slope body stability caused by material mining, the dust and noise generating in the process of crushing and screening, which have very seriously impact on the air quality and human survival environment. What’s more, the waste water and waste residue generating in washing the screening machine enter the river valley, land, which will impact the environment a lot.
mall of the air volume, which will also cause the partial burn. the water leakage of the water jacket caused the partial operation. Coal for gasification must be in good quality, which is with small stickiness, small volatile, a block diameter less than 40mm, moderate lump. If using coal with large stickiness, which can cause the furnace carbonization layer into a paste best gas furnace slag and serious impact on gas production, it is also possible damage the equipment. It also can cause partial explosion or partial burn. So the quality of the coal is very important.
Before natural gas became widely available in the 1940s, many North American and European cities used coal gas as a heating and lighting fuel. It was referred to variously as blue gas, producer gas, water gas, town gas or fuel gas. Often using the same low-pressure mains for distribution, natural gas replaced fuel gas in most uses by the 1950s because of its greater heating value and lack of contaminants.
The ball mill is a grid type .The material enters spirally and evenly the first warehouse of the milling machine along the input material hollow axis by input material device. In this warehouse , there is a ladder scaleboard or ripple scaleboard, and different specification steel balls are installed on the scaleboard, when the barrel body rotates and then produces centrifugal force ,at this time , the steel ball is carried to some height and falls down to make the material heavy striked and grinded .
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