Note in the process of grinding slag

Note in the process of grinding slag

zhengzhou, China (prHWY.com) May 7, 2012 - Note in the process of grinding slag
A, a separate grinding
Incorporation of high fineness slag in cement and concrete can improve the mechanical properties, and save the amount of cement, which causes the majority of cement manufacturers.
At present, the slag grinding techniques generally are:
â'  slag and clinker, gypsum common grinding;
â'¡ slag separate grinding, clinker, gypsum powder mixed into the cement;
â'¢ slag separate pre-grinding, grinding clinker, gypsum to. But easy to focus on the first grinding technology Grinding slag in the meal, only from the admixture effect. Separate grinding slag not only produce high specific surface area of slag powder, and the energy saving is very obvious.
One can give full play to the activity of the slag. Is well known that the hydration of the slag reflects the lag in the cement, in order to cement and slag to achieve the purpose of synchronization hydration, will keep on the control of the Hebei increasing, not pottery, fineness, and to give full play to the activity of the slag, the hardness and wear resistance of the Moreover, slag and cement compared to the great difference if the slag can not achieve the desired fineness, will result in the early strength of slag cement contribution is small, resulting in low early strength of concrete and its products, development potential, slag is used as filler can not be fully active waste of resources.
(2) to give full play to the cement activity to avoid over-grinding phenomenon. The slag hardness, hard grinding, if you want to achieve the slag ideal fineness, be sure to cause the phenomenon of over grinding of cement clinker, the early strength of cement, but the development potential of small, low intensity 28 days. It also requires the use of separate grinding method.
Reduce costs, diversify the finished product. Slag can not make full use of cement over-grinding phenomenon are sure to cause a waste of resources and increase the cost of the finished product, separate grinding method can reduce costs, Moreover, the particles of cement and slag powder can be adjusted to meet in a more The number of requests to the largest particle size distribution, and diversification of the finished product.
Second, the technical line of ultra-fine slag grinding production
Currently, many enterprises preclude the use of open circuit grinding method to produce ultra-fine slag powder should not be advocated, although the preparation of high fineness slag powder, but after grinding serious, high wear, the system power consumption generally high, and even more than 200kWh, and the stability of product quality, it is difficult to continuous production quality and stability of the ultrafine grinding. The high fine grinding technology there is no successful example in this regard, estimated by open circuit grinding method slag grinding to 600m2/kg level, you still need to improve some technical aspects. Therefore, according to Japan's ultra-fine slag powder production process, using the grinder and ultrafine high efficiency separator composed of warm pink fluttering Department of milling, the production of superfine slag powder conditions in front of the slag mill pre-extrusion, the effect will more obvious.
Meal exports from the lower part of the meal of the powder from the back of material conveying device to return the mill continued to be abrasive, finished with the wind from the powder of the powder exports, was sent to high efficiency bag filter, the gas purification The fan discharged to the atmosphere, the finished product was collected by the dust collector.


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