Advantages and development of Great Wall’s vertical roller mill

Now our government has put the comprehensive utilization of solid waste as a long term strategy of economic and society development. In the “Tenth five years plan” and “Eleventh five years plan” of the government energy saving and resource comprehensive usage, they all have clearly put forward the goal of industry waste comprehensive usage. In this way, promoting the harmonious developing of economic, resource and environment.

　　Now the Chinese steel plant all are facing the problems below:

　　1. Mineral, water and coal etc are becoming more and more shortage, With the cost rising, their benefits are reducing.

　　2. The wasted steel slags cause resources wasting.

　　3. Steel slag occupies large area, also cause deeply environment pollution.

　　Under this new situation, steel industry has put forward new demands to equipment and production line.

　　1. Developing the production process, saving the resource and developing the secondary resource reasonably.

　　2. Improving the resource usage rate, turn waste into wealth.

　　3. Improving the production process and equipment, reducing the dust pollution.

　　The features of Great Wall’s vertical roller mill

　　1. Compared with Ball mill, the vertical roller mill can saving power consumption 20%~30%.

　　Vertical roller mill take the material bed grinding principle, lower the consumption. And with the increase of raw materials’ moisture, the electric saving will be more obvious.

　　2. The vertical roller mill’s noise control meets the Industrial enterprises noise discharging standards (GB12348-2008)

　　During working, the vertical roller mill do not have the noise of steel ball crashing in ball mill, so it is noise is low. Lower 20--25dB to ball mill.

　　3. Low dust concentration.

　　Vertical roller mill take the closed system and work in negative pressure. Without the raise dust and keep environment clean. The dust discharge index has reach the Cement industry air pollutant emission standards.

　　4. Highly material drying ability, the final products’ moisture is 0.5~1.0%.

　　Vertical roller mill use hot wind to convey the materials. It can control the wind temperature when grinding large moisture materials, and make the products’ moisture meet the requirement.

　　5. Little wear and lower the metal wastage of each unit

　　During running, there’s no directly grinding between roller and grinding table, so reduce the wear, lengthen its life and reduce the production cost.

　　6. Specific surface area of slag powder is 4200~4500cm²/g.

　　The materials stay short in the mill. It is easy to inspect and control the products’ fineness and chemical component. It can reduce the over grinding and ensure product quality stability.

　　7. The occupied area of vertical roller mill is only 50% of ball mill, and reduce the investment directly.

　　As the vertical roller mill process is simple, occupied area is small and can layout outside. It directly reduce the investment.

　　Great Wall Machinery takes the “ one stop service, one window external” as our service principle. We provide the successful solving projects to steel plants, helping them improve the usage of steel slag and improving their benefits.

Xinxiang Greatwall Machinery Attend the 2nd China-Russia Expo

Approved by governments of China and Russia, the 2nd China-Russia Expo (hereinafter as the Expo) will be open from October 12 to 15, 2015 in the China Harbin international conference exhibition and sports center. As first-class grinding system integrated service provider in China, Xinxiang Greatwall Group will show its new energy-saving ball mill, high-efficiency vertical roller mill and spare parts including grinding roller, grinding table, slag pot and other large steel castings in the exhibition.

　　It is reported that China-Russia Expo will show advantages of both sides basing on theme of "mutual cooperation - Silk Road Economy brings new opportunities", also gives full play to the our advantages, so as to expand cooperation fields and enhance cooperation level. In recent years, Xinxiang Greatwall Machinery actively expands the international market basing on high product quality, good service concept. Right now it has built cooperation with world famous vertical roller mill manufacturer -Denmark FLSmidth to establish strategic, also has long time cooperation with the world largest iron and steel group Mittal Steel Group for slag pots. It shows Xinxiang Greatwall Machinery has higher visibility and reputation in the international market.

　　Xinxiang Greatwall Machinery , as first-class grinding system integrated service provider in China, with 57 years grinding equipment manufacturing experience, and complete capability to manufacture all kinds of large grinding equipments, such as ball mill, rod mill, high efficiency and energy saving ball mill, energy-saving rotary kiln, GRM vertical roller mill, etc. Xinxiang Greatwall Machinery’s new vertical roller mill with 40% power saving innovative advantage, and it has become the best choice of domestic cement, slag grinding with wide application.

　　To shoulder social responsibility to a larger extent, Xinxiang Greatwall Machinery was the first company to make achievements on industrial waste residue treatment, and has built China's first 600,000t/a slag powder line demonstration training base and industrial waste residues, research and development center of slag research, steel slag.

　　It can make full use of steel slag, slag, nickel slag waste into cement, concrete admixture and it has won national recognition. At present, it has built more than 70 nickel slag lines, steel slag lines, slag production lines in China, and it has completed the Shanghai Baosteel, Hebei Aosen Steel, Xuzhou Iron and Steel Slag with annual output of 20-150 million tons of cement/slag EPC project.

　　Welcome to visit Xinxiang Greatwall Machinery from October 12 to 15, 2015 on 2nd China-Russia Expo for sincere cooperation and common development. (all visitors at the booth or to our factory, can get the exquisite gift from our booth).

Magnesium Oxide rotary kiln / Dolomite kiln / Magnesite kiln / Titanium dioxide rotary kiln

Raw material:Magnesite, dolomite

　　Product introduction:

　　The dolomite calcined by Great wall machinery magnesium oxide rotary kiln are well selected for most of the magnesium oxide plants, with a number of advantages such as high capacity, high degree of mechanization, easy maintenance, high activity, low burning loss, high ratio of magnesium extraction and silicon utilization.

　　Performance features:

　　(1)By using 3D design and simulation, the design and structure of main parts are optimized so as to reasonable and safe working status.

　　(2)Top grade raw material and processing technology leads stable and reliable running.

　　(3)Easy, flexible and reliable operating.

　　Working principle：

　　A whole set of magnesium oxide rotary kiln involves rotating cylinder, supporting device, belt pulley kiln head, tail sealing device, coal spraying pipe devices and so on. The kiln body installs in a certain angle with sea level, supported by roller, and also gear wheels controlling the up and down movement of kiln body. For the transmission part, besides the main drive, the auxiliary drive devices, which can continuously ensue running and avoid deforming, are included in case of main power supply interrupt. The clam shell seal on kiln head and axial contact sealing device on kiln tail ensure the sealing reliability for the whole machine.

Nickel Iron Rotary Kiln/ Nickel Ore Rotary Kiln

-Introduction of Laterite Nickel Ore

Laterite nickel ore resource is formed from nickel sulfide ore rock, after weathering, leaching, sedimentary into surface weathering crust deposit, and found in tropical countries within 30 degrees north and south of the equator line in the world, mainly concentrated in tropical, subtropical areas of the Pacific rim, mainly including: Cuba, Brazil of America, Indonesia and the Philippines of Southeast Asia, new caledonia, Papua New Guinea of Oceania Australia, etc.

-Second, Structure of Laterite Nickel Ore Rotary Kiln 

Nickel ore rotary kilns consist of cylinder, rotating device, supporting device, kiln liner, kiln inlet, kiln seal and fuel device, etc. Kiln cylinder is heated rotating part, adopting winded welding of high quality carbon steel plate. The cylinder is supported by the tyre with different shifts equipped with mechanical or hydraulic type, so as to control the axial rotation of cylinder. Driving devices work through gear in the middle part so as to control speed of cylinder according to technological requirements. Due to need of installation and maintenance, large nickel rotary kiln body will rotate at very low speed. To prevent cold air into the dust and dust overflows from cylinder, the reliable seal devices of kiln inlet and outlet will be equipped.  

-Three, Strengths of Rotary Kiln for Laterite Nickel Ore Structure

(1) The main energy is coal, [1] rather than expensive coke or electricity.

(2) Free choice of raw material, various laterite nickel ores available in Southeast Asia.

(3)High quality nickel and iron (including about Ni 20 %), can be directly used for the production of stainless steel. 

(4)Meanwhile it can be used as a coolant when melting steel.

-Four, Smelting Method and Process of Laterite Nickel Ore Rotary Kiln 

Preprocessing step is to mix the ground laterite nickel ore with carbon materials and flux limestone straightly, then feed them into the rotary kiln continously. The burnt material from rotary kiln will be for water treatment. The gravity concentration and magnetic separation will recover nickel and iron from the discharge. The nickel and iron separated is 2~3 mm in diameter like sand particles, and 1 ~ 2% slag entrainment with chemical composition is C0.1 %, Ni18 ~ 22%, S0.45 %, P0.015 %. 

Announcement of Great Wall Machinery co.,ltd trademark modification

Dear customer:

　　Thank you very much for your continuous support, In order to further enhance the corporate image, build brands, Improve Xinxiang Great Wall Machinery’s brand influence and recognizable, With immediate effect, The company's original Logo will be replaced.

　

　　This is the first time to replace the corporate logo, since its founding in 1958, Also, this is a major leap of the internationalization, then, our Website, promotional materials, business cards, contracts, quotations, image advertising and other documents, will be replaced by the new logo Gradually, During this period, The new logo and the old logo has the same effect, If this bring you any inconvenience, Please understand, we would be grateful!

　　Hereby notify!

　　Xinxiang Great Wall Machinery Co.,Ltd

　　On August 25, 2015

Great Wall Machinery Under-construction Projects Introduction in July

Great Wall Machinery, as a leading enterprise of domestic industry in the field of general slag powder grinding production line, regardless of declining current market, still win many orders of largeslag powder production lines this year. Now Greatwall is still busy in business negotiation, production arrangement, quality control and proceed the orders. So what are the Great Wall Machinery’s construction projects? Let's enjoy it.

　　Firstly Harbin slag powder EPC project with annual capacity of 350,000t

　　Harbin project was started in January 2015, and was officially launched on April 25, 2015. Now it has now been installed with online debugging.

　　Secondly, Mei Country slag powder production line EPC project with annual capacity of 300,000t

　　Mei Country project was started in February, 2015, and was officially launched on April 25, 2015. It is at present installed well, and the dust collector’s installation is 70% completed.

　　Thirdly, Foshan EPC production project with annual slag powder capacity of 600,000t.

　　Foshan project has started on June 14, 2015, right now frame is almost completed, and the next step is on the way.

　　Fourthly, Xianning superfine slag powder production line EPC project with annual capacity of 300,000t

　　Xianning Project was launched on June 13, 2015, at present the blast furnace has been installed completely, and the welding bridge of vertical grinding machine is beening welded.

　　Finally, Xuzhou steel slag powder production line - EPC project with annual capacity of 300,000t

　　The Xuzhou Project contract was signed in February 2015, and was officially launched on March 24, 2015. Now it is currently online debugging.

Focus on quality, The whole world spread "sincerity"

The starting of August,The Great Wall steel casting have good news again!!In 2015 after success in Germany, the United States, Russia and other overseas markets, the Great Wall steel casting, 11 slag pots was sent abroad, exported to India, Finland .

　　It is understood that the slag pot delivery, there are 6 more continue to India's Tata steel group, 5 pieces were sent to steel mills, Finland, so to speak, the Great Wall of casting steel slag pot for the international iron and steel group provide a solid guarantee efficient production, confirm the Legend in the market “the casting from Great wall,trust of selected.”

　　Since company established, in order to practice "trustly character base, heartly quality cast." service commitment, the Great Wall of cast steel insist on high quality casting + perfect quality production management, has been higher than the international standard quality control methods, and strict inspection of the production process, ensure the casting out of slag pot, gear ring, node, quality first-class, quality is reliable, welcome by customers at home and abroad for many years, has been successfully exported to Japan, South Korea, the United States and other more than 50 countries and regions.

　　The bell has just rung in the second half of 2015, a new starting point, new journey, the opportunity is fascinating, development is full of confidence, horn and finally have a good news, GREAT WALL PEOPLE will full power, to run in high quality casting for the customer the journey...