Steel-Rubber Composite Material

Belongs to the field of composite materials technology, particularly relates to a rubber-steel composite liner plate and its manufacturing process.

Background Technology

1. The ball mill is a key equipment for material pulverization after crushing. The grinding body in the ball mill is generally steel balls, which are loaded into the cylinder in different diameters and proportions. Grinding bodies can also be steel segments. Depending on the particle size of the grinding material, the material is loaded into the hollow shaft of the ball mill from the feed end. When the ball mill cylinder rotates, the grinding bodies, due to inertia, centrifugal force, and frictional force, adhere to the inner liner plate and are carried away by the cylinder. When they reach a certain height, they are dropped and crush the material inside the cylinder like projectiles. In the beneficiation and building materials industries, the lining plates inside dry grinding mills mostly use fully austenitic manganese alloy steel liner plates. However, they are heavy, consume a lot of energy, incur high labor costs for installation and replacement, produce excessive noise during operation, and have a significant environmental impact.

2. The existing rubber and high manganese alloy composite steel lining plate generated by many manufacturers on the market, there are problems such as insufficient steel skeleton support, easy to crack molding, and immature rubber composite molding process, and the steel skeleton assembled by multiple steel plates is poor stability, which can not meet the needs of ball mills.

3. The rubber liner developed by our company is combined with rubber and high chromium alloy grinding block, which greatly improves the wear resistance, and the unique elastic buffer of rubber itself greatly reduces the fierce impact force; The physical density of rubber is one-sixth of manganese steel, reducing the quality of the liner, thereby reducing the load of the motor, saving energy, that is, reducing the cost; The collision between steel and rubber itself reduces the noise, and the rubber itself has a sound insulation effect, which indirectly improves the production efficiency of the enterprise.

However, the inherent elasticity of rubber itself also affects the grinding efficiency. Compared to the difficulties in the production process, the greater challenge lies in how to reduce the impact on grinding efficiency and achieve the best cost-effectiveness. Our company's developed steel-rubber liners have no rubber layer on the surface of the wear-resistant alloy blocks, which not only increases efficiency but also avoids rubber blocks from falling and clogging the filter screen in front of the slurry pump. At the same time, our company can analyze the various movements of grinding balls inside the mill and calculate the particle motion trajectories of materials in the mill using discrete element simulation models under different conditions. We can select the optimal solution for production. Currently, we have produced a set of 5585 ball mill steel-rubber composite liners, which will be used in the Dashan concentrator of Jiangxi Copper Group's Dexing Copper Mine. We will collect the usage results and data and continue to collaborate with Shanghai Jiao Tong University, Xi'an University of Technology, and other cooperative institutions for optimization and improvement.

Currently, the mainstream steel-rubber composite is mainly used for the feed and discharge end liners of ball mills and slurry lifters, and the usage effectiveness and manufacturing process are relatively mature. Our company is capable of producing the aforementioned products.