News Date:2015-09-14
Along with new dry process cement production technology mature gradually, in recent years, China cement powder grinding technology and equipment also make a great progress. The equipment of powder grinding system, such as ball mill, vertical roller mill, roller press, already upgrade for several generation under research and development and upgrade. But the power consumption of powder grinding equipment accounts for 65%~75% of comprehensive power consumption of the cement production, and our country has strict requirements gradually for energy conservation and emission reduction, so that powder grinding system will be the important segment for cement production line to implement energy saving and consumption reduction. For cement enterprise, it is the key to tap potential of energy-saving of grinding system.
In the each system of powder grinding system, energy-saving effect of vertical roller mill is concerned greatly and approved, in recent years, “without ball tendency” great discussion, which is concerned greatly, is the typical representative.
Experts say that cement vertical roller mill as a powder grinding equipment with new type, high efficiency and energy saving, is the main trend equipment in the process of cement production, and it will be getting greater development and application, the age, which is grinding with steel ball and ball mill, will be end eventually. For this view, Gao Changming, who is the senior consultant of China cement net, showed agreement in the article of the past review about the application of vertical roller mill in domestic cement industry, he says, in the aspect of cement powder grinding, the comprehensive advantages of vertical roller mill, such as energy saving, cement production capacity, total weight of system equipment, system installed capacity and system installed capacity etc., is doomed that objective law of development of traditional ball mill will be replaced by vertical roller mill.
Although cement vertical mill is recognized by many people, but there are a few usage rate of cement industry at this stage. Introduced by Gao Changming, the usage rate of raw material and slag vertical roller mill is more than 80% in 2010 in our country, being the first choice type of powder grinding. But the usage rate of vertical roller mill is 8%, and is still low, there is a great distance compared with international usage rate of 70%. Compared with before, cement vertical roller mill obtains more and more approval in market.
To find its cause, the main cause is that many cement enterprise is not familiar with cement vertical mill, and they believe that the cement performance of vertical roller mill is worse than ball mill. Gao Changming explained, it once happened in developed country about this misunderstanding, but after research, developed country found that the essential of this problem is due to the appearance of vertical roller mill cement, it needs a process of intercoordination and transition among cement enterprise, commercial concrete enterprise and construction, its belongs new problem which is happened in scientific and technological progress, and it can be solved and accepted totally. According to foreign relative research trial and many production practice results showed that the transition period is about 3 months between its producing of cement and market to a specific cement vertical roller mill, it is not exceeding 6 months, actually, it is a problem which is happened and solved in foreign country. The domestic industries do not because of this misunderstanding to deny vertical roller mill.
In fact, the vertical mill as an important equipment of cement production line, at beginning of grinding raw material only, developed to be final equipment of cement, it experienced innovation, improvement, optimization and perfect in its machine design, material selection and design technology. And experts of cement industry do a series of trial and practice in its performance, it is proved that its energy-saving is stronger than ball mill, unit power consumption is only 25kWh/t. So, its promotion is helpful to promote energy-saving of grinding system under the condition of stable performance.
Although vertical roller mill energy-saving and consumption reduction effect is obvious, it also makes progress continuously in technology, and ball mill will be replaced by vertical roller mill in the future. Gao Changming believed that domestic cement industry has a great market requirement for vertical roller mill, and this requirement may be continued for more than decade. He emphasized that technology development innovation is continue progress, the same as other grinding equipment, it has revealed incipient tendency that final powder grinding system of roller press is superior to vertical roller mill, especially in raw material grinding aspect, Gao Changming believed that cement industry should welcome this situation of innovation competition.
| Great Wall Corporation Entered on Large-Scale Production Age of Vertical Roller Mill | Vertical Roller Mill Will Become Development Tendency of Cement Grinding | Return column |
