Two Advantages of Great Wall Vertical Mill

After almost a decade cooperation with veteran experts on vertical mill manufacturing and scientific research institutes both in home and abroad, the GRM series vertical mills dedicated to be developed and produced by Xinxiang Great Wall Machinery Co., Ltd, have the characteristics of reliable performance, compact structure, convenient maintenance and outstanding energy saving etc. Here are two more important advantages of Great Wall vertical mill.

　　Wear protection

　　The grinding plant, which is carefully maintained by the owner, provided high availability and trouble-free operation. None of the wear protection plates in the mill housing and in the grit cone of the separator have yet needed replacing. Only the ceramic castable in the upper housing section of the separator was replaced by wear-resistant steel plates soon after the commissioning. Once a year, after approx. 3500 operating hours and production of 300,000t of ground blast furnace slag, the surfaces of the grinding elements are refurbished by build-up welding during a planned maintenance stoppage. The specific wear of grinding track and roller tyres, taken together, is 7.3g/t.

　　For long service life of the grinding tools not only the appropriate wear lining is important. The iron extraction system in the external material circuit is an extremely important feature of the Great Wallvertical roller mill for slag grinding.

　　Iron extraction system

　　It is a well-known fact that iron particles in the granulated blast furnace slag are the main cause of wear in the mill. Therefore it is extremely important to remove the maximum possible amount of this iron. The external material circuit is very well suited for this purpose, because it handles a large quantity of material, some of which is already partly ground.

　　The material passing through the nozzle ring falls onto a discharge ring rotating with the grinding table. This material then passes via a discharge chute into the bucket elevator.

　　The material discharged by the bucket elevator is fed to a vibrating trough, to ensure a uniform feed rate to a magnetic drum separator. The aeration of this magnetic drum separator is so designed that practically pure iron with no granulated slag is removed from the stream of material. After the magnetic drum, the recirculated material finally returns to the grinding table. The incoming granulated blast furnace slag has an iron content of 0.28%, corresponding to an iron quantity of 210kg/h.

　　The recirculating material in the bucket elevator has an iron content of 0.7%. The magnetic drum separator removes around 170kg of iron per hour in permanent operation. The iron contents found in the roller mill and in the finish product impressively illustrate the efficiency of the external material circuit for concentrating the iron and facilitating its removal. Such efficient extraction of iron in the grinding process has a very positive effect on wear in the mill.

　　In the world, many granulated blast furnace slag grinding plants are already in operation, but the number of granulated blast furnace slag grinding plants is still low. Customers from all over the world who are now interested in slag grinding are invited to send their inquiries to the Great Wall Machinery. Any of your inquiries will get prompt attention.

The composition and characteristics of Great Wall Cement Production Line

Cement Production Line mainly contains material crushing, homogenizing, preheating decomposition, calcined cement clinker, cement grinding, finished product packing and so on, the composition of Cement Production Line mainly contains Rotary Kiln，Cement Mill, Cyclone Preheater, Cooler and so on. On Cement Production Line, the correct Cement Mill selection and the reasonable technological process are important guarantee on the cement production line.

　　On the Cement Production Line, Rotary Kiln is very important, the composition of Rotary Kiln mainly contains Roller kiln head, activities, support equipment, transmission equipment, sealing device, burning device and so on. Great Wall Rotary Kiln has simple operation, reasonable structure, smooth operation, easy handling during production process, so it's your best choice.

　　In addition, on the Cement Production Line, cement grinding is also an important step, and it is also the end process of production line. Its main function is to cement clinker grinding to a suitable fineness, developing a certain grain size distribution, in order to accelerate the hydration speed and satisfy the requirement of hardening. In this step, You can choose the appropriate vertical cement mill and ball mill according to their own needs. Great Wall is engaged in cement grinding research and production for 60 years, No matter from the design and use, it can make the customers get the maximum energy saving and time saving.

　　At last, I want to tell you, the Great Wall machinery factory has a service concept which is customer satisfaction for years. The cement plant provides a very wonderful cement production line for the general customers, which has high degree of automation, environmental protection, large industrial waste utilization and high production efficiency. Welcome to our Great Wall!