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“Compared with the most widely used ball mills, the biggest feature of our new generation of grinding machines is energy saving.†Xu Weinan told reporters that the new mill energy utilization rate can be achieved under the same hourly output and crushing quality. It is 10 times higher and more than 50% energy-saving. It is only half the size of a traditional ball mill.
Take the case of applying a ball mill with an annual output of 300,000 tons of cement production line: an annual output of 300,000 tons of cement production line requires a diameter of 3.8 m × 7.5 m ball mill, motor power of 1600 kW, output of 80 tons / hour; diameter of 3 m × 12 One rice clinker ball mill, electric power 1250 kW, output 32-35 tons/hour; one diameter 2.4 m×4.5 m coal ball mill, electric power 240 kW, output 8-9 tons/hour, 3 billiard mill Electricity consumption accounts for more than 30% of the electricity consumption of cement production. If a new generation of pulverizer is used, the production line can save 9 million kWh a year, worth 4.5 million yuan, and the economic benefits are considerable. At present, if the annual production of cement in the country is calculated at 1 billion tons, the ball mill consumes more than 100 billion kWh of electricity. If you choose a new energy-saving ball mill, you can save 30 billion kWh by electricity saving, and you can save 30 billion yuan per kWh of electricity, which can save the country 15 billion yuan. More than 10 million tons of coal.
“The second significant feature of the new grinding machine is that the grinding fineness is fundamentally improved.†Xu Weinan said that the new energy-saving ultra-fine grinding machine can measure the finest material up to 12000 mesh (equivalent to 1 micron). Above, the same ball mill with the same output can only reach 200 mesh (equivalent to 74 microns). After the material is ultra-thinned, it will generally increase by 2 to 4 times, and some even up to several times. In addition, the new mill has a wide range of applications, suitable for production in more than 300 industries such as cement, ceramics, coatings, coal, chemicals, metallurgy, etc. It can replace almost all types of mills and can meet the production requirements from 0.1 tons/hour. The need of ~60 tons / hour, both dry and wet grinding, and environmental performance is very advantageous.
Xu Weinan also introduced to the reporter the working principle of “energy-saving superfine grinding machineâ€: the material is fed into the mill through the feeding port by the lifting conveying equipment, and the ball milling, turbulence and vibration functions in the grinding chamber are utilized, and the specially designed high-speed rotating device is utilized. The high-frequency medium-rotating rotating airflow field is generated, so that the particulate materials added to the pulverizer are impacted, rubbed, sheared or cut to achieve pulverization. During grinding, the material expands under a high frequency shock for a short period of time, and the material is pulverized or torn due to tensile stress caused by cracks, fragile parts, grain boundaries or heterointerfaces. The pulverized material enters the micro-powder classifier through the outlet to realize the fractional separation. The fine powder that meets the fineness requirement is collected by the cyclone collector, and the coarse particles are re-entered into the mill through the conveying device at the lower end of the classifier for pulverization.
A new generation of energy-saving ultra-fine grinding machine was successfully developed in Lanzhou
Due to the high energy consumption, low grinding precision and low grinding efficiency of the existing grinding equipment, for many years, Chinese scientists and technicians have continuously explored new technical solutions to develop replacement products with superior performance. Recently, Lanzhou professional inventors Xu Yongping and Xu Weinan met with this reporter and showed reporters a new generation of high-efficiency and energy-saving ultra-fine grinding machines that were successfully developed by them and obtained national patents.
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