In the metallurgical pelletizing industry, pelletizing is the key link in the pellet production and the green-ball quality directly influences the quality of final pellets. In the powder grinding technology of iron concentrate, using high pressure suspension raymond mill can greatly reduce the electricity consumption, improve the green-ball quality and reduce the additive amount of bentonite. According to the test and production experience, using high pressure suspension grinding mill has the following advantages:
(1) The energy consumption of unit crushing and powder grinding is greatly reduced.
Compared with traditional damp mill, using high pressure suspension grinding mill greatly reduces the electricity consumption for powder grinding and saves production cost for the companies.
(2) It increases the specific surface area of iron concentrate and the strength of green-ball.
After being ground, the specific surface area of iron concentrate is increased by 200~400cm2/g, and the surface activity of raw materials is improved, thus improving the pelletizing performance of materials and improving the quality and compression strength of green-ball, which is conducive to improving the working condition of pelletizing and the quality of green balls and creating conditions for high and stable yields of valuable pellet.
(3) It can effectively reduce consumption of bentonite and improve pellet grade.
After being ground by high pressure suspension grinding mill, the specific surface area of iron concentrate is increased, the surface activity is further strengthened and the strength of green-ball is improved, thus effectively reducing the additive amount of bentonite and improving the pellet grade.
(4) The floor space of the equipment is small, thus saving infrastructure investment cost.
(5) The machine has small vibration and low noises.
At present, high pressure suspension mill has been widely used for the fine crushing of ores before powder grinding and pellet making with iron concentrate as the key technical equipment. Its application is a another important technical revolution in the powder grinding field and it has become a worldly tendency for high pressure suspension grinding mill to finally replace damp mill and be used for the fine crushing before the powder grinding process. In a word, high pressure suspension grinding mill plays a crucial role in promoting the structural adjustment of mining and metallurgical industry, and its social and economical benefits are huge and it promotes the improvement of powder grinding technical level and equipment ability of China.