subject: One Way To Maintain The Impact Crusher [print this page] The impact crusher (Impact breaker) is a new type of high-efficiency crushing equipment. Its features are small in size, simple in structure, big reduction ratio, low energy, large production capacity, equal product granularity, selective in crushing minerals. It is promising equipment.
Even though Impact crushing machine of different manufacturers are different in model and mass, their working principle and structure are same. So Impact crushing machine mainly consists of board hammer, impact plate, board hammer pedestal, rotor, and feed port etc. It is one type of high-efficiency crushing equipment. The ore goes through the feeding port input, and then follows the screen-plate to slide down. When the ore where on the screen leave was crushed by the high-speed rotary rotor's hard-alloy hammer, then though the basic crushing stone follow on the tangent fly the first impact plate with the higher-speed for the crushing again, the impact plate will be stricken back by the ore. And other ore behind of rotor is blowing out collision. Ore after firstly crushing room break up the some size, though impact plate and the rotor space to discharge the secondary crushing room, going on are struck repeatedly, when the size of the stone is general then output from the output port of the bottom of the crusher.
Considering the service life of the impact crusher, Hongxing Mining Machinery has special treatment in the process of the material of the liner. Before the high-manganese steel material is made into the liner of the impact crusher, it needs to go through water toughing. In this process, the heating rate is one of the most important reasons to affect the final quality of the materials.
Under normal circumstances, when the heating temperature is below 400 , the cast structure dose not change significantly. The needle-like carbide precipitates when the temperature is around 450. Carbides significantly increase at 500. The carbide precipitation is the most at about 550. The length of the needle-like carbides gradually becomes shorter and the layers becomes generous when the temperature is 600, . Above 700 , the carbide castings in the cast structure begin to dissolve in the austenite. At the beginning, the intragranular acicular carbide first dissolves. At 800, most of the intragranular carbides disappear. On the grain boundaries and near the grain boundary, there still be the undissolved carbides. Carbides on grain boundaries at more than 850 become thinner and narrower to broken mesh due to the gradual dissolution of the carbides. The residual carbides on the grain boundaries above 900 gradually disappear and become isolated state of agglomeration. The undissolved carbides gradually shrink with the increasing temperature. Above 950 , all dissolve in the austenite.
In the heating process of the high-manganese steel, if the heating rate is fast enough, the austenite can not precipitate the carbides. There will no eutectoid reaction. By this point, we can control the precipitation of carbides in high-manganese steel heating process. Managing to reduce the precipitation of carbides in the heating process is helpful for the performance of steel.
In the actual operation, since the furnace temperature and heating rate is related to the specific conditions of the casting, we can carry out the operation according to the actual practice.
Stone crusher : http://www.china-crusher.com/stone-crusher3.html
Raymond mill : http://www.mine-crusher.com/raymond-grinder.html
