Tube Mills Auxiliary Equipment materials in the metallurgical, mining, cement, thermal power and other industrial sectors of the entire energy consumption and economic costs occupy a large proportion. In 2014, the Chinese Academy of Engineering consultancy study report shows that in 2012 the national consumption of friction, wear and lubrication in the funds for the 1 trillion yuan, accounting for 4.5% of GDP gross domestic product. According to incomplete statistics, only broken equipment and excavator bucket teeth, slurry pump and other losses, each year not less than 7 billion, of which the ball is not less than 4 billion, 1.5 billion liner, hammer 800 million, bucket teeth 5 Billion. According to the weight of the material consumption, the domestic consumption of metal Tube Mills Auxiliary Equipment materials per year about 300 million tons, of which, grinding ball consumption of nearly 1.8 million tons, while the metallurgical mine consumption of the ball grinding industry accounted for 70% of the total; And a variety of crusher liner consumption of nearly 300,000 tons.
In order to improve the wear resistance of anti-wear materials, scientists have done a lot of research on abrasive materials. Tube Mills Auxiliary Equipment materials can be divided into three stages: the first ordinary white cast iron and high manganese steel, the second is nickel hard cast iron, the third is high chromium white cast iron. The Tube Mills Auxiliary Equipment materials in the different stages of development to reduce the unit material consumption has played a very big role, but the material performance there are some problems, such as ordinary white cast iron toughness is low, high manganese steel work under low impact load hardening , High chromium cast iron in corrosive media under the wet grinding conditions, wear resistance is not good, while toughness is also insufficient. Due to the lack of toughness, the abrasive media is often broken and peeled off, which reduces the productivity of the grinding mill, reduces the grinding efficiency, increases the energy consumption, and wears the auxiliary equipment of the grinding closed loop. Therefore, people want to develop more tough anti-wear materials.
Under normal circumstances, to improve the performance of Tube Mills Auxiliary Equipment alloy is based on the increase in alloying elements on the basis of the current worldwide, a variety of ferroalloy prices soared, leading to Tube Mills Auxiliary Equipment materials manufacturing costs continue to rise. At present, China's use of anti-wear materials are mainly chrome-based anti-wear materials, such as low-chromium cast iron, high-chromium cast iron. And China is a chromium resource poor countries, 90% of the ferrochrome need to import, nearly 10 years, high carbon ferrochrome prices turned 4 to 5 times. According to this reality, the development of Tube Mills Auxiliary Equipment materials suitable for China's national conditions, so that scientific and rational use of existing resources, in order to sustainable development of the national economy, for future generations, should cherish the valuable strategic resources, the development of less with chromium or not Chrome material, instead of chrome-based Tube Mills Auxiliary Equipment material.
Therefore, the project is intended to adopt a small amount of alloying and heat treatment to strengthen the technical measures to strengthen the development of carbide isothermal quenching ductile iron (CADI) toughness and Tube Mills Auxiliary Equipment materials for metallurgy, mining, cement, power generation and other industries to provide a quality Of the anti-wear materials.
The Tube Mills Auxiliary Equipment is the key equipment after the material is broken and then crushed. It is widely used in cement, silicate products, new building materials, refractories, fertilizer, black and nonferrous metal processing and glass ceramics and other production industries, all kinds of ore and other grinding materials for dry or wet grinding. Tube Mills Auxiliary Equipment for grinding all kinds of ore and other materials, is widely used in mineral processing, building materials and chemical industries, can be divided into dry and wet two grinding methods. According to different ways of ore discharge, can be divided into lattice type and overflow type two.
Material from the feeding device by the feed hollow shaft screw evenly into the first warehouse, the warehouse has a ladder liner or corrugated liner, built a variety of steel ball, the cylinder rotation to produce centrifugal force to the ball to a certain Height after the fall, the material hit and grinding effect. Material in the first warehouse to get rough grinding, the single compartment through the plate into the second warehouse, the warehouse with a flat liner, with steel balls, the material further grinding. The powder is discharged through the discharge grate to complete the grinding operation.
Cylinder in the process of rotation, the grinding body also has a slippery phenomenon, in the process of slipping to the material to the grinding effect, in order to effectively use the grinding effect of the larger material size of the general twenty head when grinding, the grinding body cylinder With the compartment board separated into two sections, that is, double warehouse, the material into the first warehouse when the ball was broken, the material into the second warehouse when the steel section of the material grinding, grinding qualified material from the discharge side of the hollow Shaft discharge, the small particles of the feed material when grinding, such as sand on the 2nd slag, coarse fly ash, mill cylinder can not be partition, as a single cylinder mill, grinding body can also use steel section.