In recent years, the southeast Asian countries accelerate industrial structure adjustment, infrastructure construction be in the ascendant, the industrialization, the urbanization process fast push, especially in Indonesia is flourishing demand for steel, this year is expected to more than 15 million tons, up nearly 10% on the previous year, and by 2025 the number will reach 26 million tons.

In recent years, the implementation of basic construction expenditure in total GDP ratio of Indonesia has doubled, while the expenditure in the past only about 2%. The domestic real estate industry in Indonesia is currently on the rise, a huge market, will undoubtedly increase the demand for cement, the government resettlement housing construction each year, thus increasing the demand for cement industry and the construction industry, with a large number of urban infrastructure construction, road construction, etc. . Indonesia's urban construction in the future, infrastructure construction and industrial development with unlimited business opportunities, will be followed by a new cement market demand. Due to the impact of the global financial crisis, coalmine, nickel ore and other mineral resources decline, the market weakness in mining, cement prices are falling, the cement industry to save costs is imperative. Currently Indonesia mineral slag, nickel slag and iron slag, processing is still in its infancy, almost no processing, some of them used for reclamation or fill the crater. Without any disposing, they will case the raise dust and pollute the air, silt the river. The toxic chemicals in them will even harm human and animals health.

It is said that the utilization rate of steel slag for some developed countries reach 60%. For example, French and Canada use steel slag as ballast of railway. Japan and Germany use steel slag as cement raw material. Some countries of Western Europe extract the calcium, silicon, manganese and microelement in steel slag use as fertilizer, and all of those make steel slag re-apply in life, the problems of difficult stacking and environmental pollution are solved completely.

On 10th November, 2015, Chairman of Indonesia Growth Steel Group, Mr Su came to Xinxiang Great Wall machinery co., LTD., had made final inspection and signed about 300,000 t/y of nickel slag production line project, the chairman of Xinxiang Great Wall, Jizhong Wong had taken on a grand reception. This cooperation, also indicates Xinxiang Great Wall mineral slag, steel slag and nickel slag -turnkey project grinding lines go abroad to the world again.

With people’s knowing about the slag performance and economic value, now many cement and concrete enterprises start to produce and use slag. The activity slag used in cement production can replace large amount clinker, used in concrete can replace large amount cement and improve the concrete performance. It can lower the production cost and save energy.

As we all know, the cement additives surface area is 350～500m²/kg, concrete is 420～600m²/kg, some even over 800m²/kg. Research shows that when mix the fineness over 500m²/kg slag into the concrete, can save 20%~30% cement. It can lower the production cost and improve the concrete’s strength, work ability and durability. No matter used as cement additives or concrete additives, the basic conditions for slag is their fineness.

Mineral Slag

Mineral slag is the waste slag discharged from blast furnace during pig iron smelting. It could be concrete admixture after milling process.

Nickel Slag

Nickel slag is the solid waste generated by smelting nickel iron alloy. The nickel iron alloy is the main raw material for stainless steel.

Steel Slag

Steel slag is the waste residue in the process of steel making, including converter slag and electric furnace slag, approximately takes 15-20 percent of crude steel capacity.

Manganese Slag

Manganese slag is the waste of smelting Manganese. It could be the material of silicon manganese alloy after milling process.

Vertical roller mill is typically designed to deal with industrial waste residue. With cost-effective supply of accessories for cement equipment and the growing maturity of China's equipment manufacturing technology, more and more foreign companies choose Chinese equipment suppliers and service providers. The integrated vertical milling system, pioneered by Xinxiang Great Wall Machinery that has successfully built more than 100 mineral slag, steel slag and nickel slag -turnkey project grinding lines at home and abroad, can deal with all the slag mentioned above. Vertical milling system has been tested and verified by the practices, and also benefits millions of money for enterprises.

What is GRM?

After almost a decade cooperation with 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., after incessant perfection. At present, we can produce the supporting raw material vertical mill, coal vertical mill, and cement vertical mill that can cater to 300-3000 t/d cement production line, and the series slag vertical mills with annual production capacity of 0.2 million tons, 0.3 million, 0.45million tons, 0.6 million rons,0.9 million tons and 1.2million tons.

Advantage of GRM

1. High efficiency and low power consumption in powder milling

2. The consumption of material is low in unit product

3. Low noise in material powder milling, operate with negative pressure, low dust pollution

4. Simple in technology flow, meanwhile finish the function of material powder milling, drying and powder selection

5. With easy operation system, saving labor cost.

6. Low area occupying, compact allocation, light weight in system equipment and low investment in civil construction

Structure Characteristics

1. The compound separator improved power selection efficiency.

2. Has automatic function of roller uplifting and down falling and can realize idling startup.

3. Adopt the sealing of jointing arc board, simple and reliable in structure with good sealing effect.

4. Resorting to the roller turning equipment can conveniently turn the roller out of the mill for overhauling.

5. Mechanical limiting structure can avoid the direct metal friction and collision between roller and millstone, increasing the use security.

6. The operation pressure is low in hydraulic pressure system, decreasing the oil leaking failure and vibration of mill, which is conducive to operation and management.

7. Roller bearing adopts the concentrated cycle lubricating of thin oil, guaranteeing the running of bearing under the conditions of low temperature and pure grease and effectively prolonging the longevity of bearing.

The Advantages of Slag Powder/Steel Slag Powder Production Lines

1. Considerable Investment Returns, 1-2years Payback Period

The widespread use of slag powder brings in its wake an increasing market demand for slag powder production equipment. Investing in this business can get you rewarded with considerable profits on an annual basis. Generally speaking, it would take 1 to 2 years to recoup money spent on the project.

2. High Productivity and Energy Efficiency

GRMS series vertical roller mill is thought of as the heart of a complete slag powder production line. It helps reduce power consumption by 20% to 30%. Slag powder produced by our line generally has a specific surface area of 4200-4500cm²/g, which meets the particle fineness and size distribution requirements. They are ideal admixtures for a variety of Portland cements.

3. Mature EPC Solution

Apart from advanced production equipment and a great team of technical specialists, we also tie up with chief experts from Chinese vertical roller mill industry in a joint effort to develop the GRMS53.41 series slag vertical roller mill. Depending on your needs, we can tailor-make a detailed solution for design engineering, raw material procurement, and project construction.

4. Numerous Domestic and Foreign Customers Case

We have been receiving good reviews from customers across the country since the day our production line was put into service. Thus far, we have sold out over 40 slag powder production lines, such as the slag powder EPC line with annual production of 1 million ton for Henan Meng Electric Group, the mixture powder ECP production line with 0.9million annual production for one Ningbo customer and 40 more slag powder EPC subjects of 0.6/0.3 million annual production in Guangzhou, Guangxi, Shandong, Shanxi, Hebei, Henan, Liaoning, Neimeng etc.

5. Off-Gas Emission and Noise Level in Line with National Standards

Measures are taken to make certain that our production line meets the GB4915-2004 standards for dust emission and GB12348-2008 standards for noise control. The purpose of our effort is to ensure the emission of any environmental pollutants meets related national standards and its impact on the surroundings would be reduced to minimum.

6. Low Electricity Usage

Innovations in techniques allow us to produce an energy-efficient vertical roller mill that can effectively crush the glass structure of the slag between layers. Usually, less than 43KWh of electricity is used for grinding 1 ton of slags to a specific surface area of 4200-4500cm2/g. Its electricity usage is much lower than the average level in this industry, which greatly helps reduce production cost.

7. The advantage of the fastest delivery

Our company possesses the large scale Steel Casting Room and very great Mechanical Processing ability for undertaking all kinds of casting parts or equipment orders. With the assurance of the high quality, a vertical roller mill can be promised to delivery in 4-6 months. Meanwhile, the production cycle for a complete set of production line is as short as 6-8 months.

Xinxiang Great Wall Machinery Corporation, located at National Sustainable Development Experiment Area, Mengzhuang Town, Huixian City, Henan Province, China, was initially built in 1958 and restructured into limited liability Company from township collective enterprise in 2002.

Covering an area of 330,000 m² and having more than 1,100 employees, the company has a total asset of CNY 500 million and has passed ISO9001:2008 quality management system authentication and is a main specialized supplier for manufacturing large scale kiln mill. Possessing the experience of equipment manufacturing for more than half a century, the Company has formed the perfect operation and management system in design and development, product manufacturing, market promotion, equipment installation and after sales service.

Since the first ball mill produced in 1968, the company has produced more than 2600 sets of mills and rotary kilns in various specifications, and the products are sold to each provinces of China, and exported to America, Russia, Japan, Brazil, India, South Korea, Vietnam, Kenya, Iran and others, enjoys high market reputation.