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    • CommentAuthordongfang
    • CommentTimeOct 30th 2015
    Based on fossil fuel business improvement strategy produced by Nationwide Improvement as well as Change Fee, you will find 8 main duties with regard to Chinese language fossil fuel long term improvement little cellular crusher, numerous facets of that connect with the use of brand new vertical roller mill. Out of this stage, we are able to begin to see the guaranteeing prospective client associated with vertical roller milll later on.

    The master plan implies that Chinese language fossil fuel occupies 37% from the complete fossil fuel on the planet. Fossil fuel makes up about 76% associated with main power manufacturing as well as 69% associated with it's usage respectively. For a long period within long term, fossil fuel continues to be the primary power within the far east. Using the change associated with fossil fuel commercial financial development setting and also the expansion associated with fossil fuel software, vertical roller milll is going to be used increasingly more broadly.
    The master plan additionally obviously implies that improvement path associated with Chinese language fossil fuel business is principally fossil fuel manufacturing legislation, business associated with large-scale fossil fuel angles as well as business, fossil fuel technologies development, secure fossil fuel manufacturing, preserving power as well as environment safety. Regardless of with regard to manufacturing legislation or even business business, technologies development, preserving power or even environment safety, many of these require brand new vertical roller milll.
    Based on the marketplace situation, vertical mill, ruthless mill as well as vertical roller milll are brand new kinds fairly, that have distinctive benefit within digesting fossil fuel along with other my own ore natural powder simultaneously pleased with the necessity associated with large-scale manufacturing, collectivization, power preserving as well as environment safety.
    • CommentAuthorgreatwall
    • CommentTimeDec 27th 2015
    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.
    • CommentAuthorgreatwall
    • CommentTimeJan 3rd 2016
    What is Granulated Blast Furnace Slag?
      Blast furnace slag is a byproduct of the iron and steel manufacturing process. In the production of steel, iron ore – a mixture of oxides of iron, silica, and alumina – together with a fuel consisting of coke, natural gas, oxygen and pulverized coal and also limestone as a fluxing agent, are fed into a blast furnace, which consists of a large vertical chamber through which large volumes of hot air are blasted. Generally a blast furnace operates on a continuous basis and produces approximately 250 – 300 kg of slag/t of iron produced.

      The chemical reaction results in two products: molten iron metal and molten blast furnace slag. At this stage molten blast furnace slag can be converted into two different products; (1) blast furnace slag aggregate (BFS) or (2) granulated blast furnace slag (GBFS). To produce GBFS, liquid slag must be rapidly quenched using large volumes of high-pressure fresh water sprays, instantly cooling the molten material to produce a sandy material with a maximum size of 6 mm.

      Typically BFS is then collected from the manufacturing source or blast furnace granulation bays and transported to the nominated processing facilities. The GBFS is de-watered and dried to reduce the moisture content before further processing (grinding) in a traditional cement clinker grinding plant, then ground to a fine powder. At this point the ground granulated blast furnace slag or GGBFS is stored in silos awaiting delivery to customers.


      1.The reactive properties of GBFS depend upon a number of factors, including:

      2.Temperature of slag before granulation.

      3.Chemical composition.

      4.Condition during granulation (flow rates and temperature).

      5.Fines content.

      6.GGBFS is mostly used in the production of quality-improved slag cement, namely blast furnace cement (BFC).