Slag Grinding Plant For Sale – Vertical Roller Mill Customized Solution

What is a Slag Grinding Plant

GGBS Application

Slag Grinding Plant is built to produce GGBS (Ground Granulated Blast Furnace Slag Powder), which is a by-product (micro slag powder) of blast furnaces for ironmaking. It has high potential activity and hydraulic hardness. Its main uses are:

• Slag Silicate Cement Production: Slag is directly added in a certain proportion for Slag Silicate Cement production. Adding slag in cement has the advantages of improve the performance of cement, reduce production costs and energy consumption. In slag silicate cement production, the amount of water slag added is 20%-70% by weight.
• Directly Mix Concrete: In ready-mixed concrete and cement products, it can replace part of the cement in equal or excessive amounts, about 50% of cement. And directly mix concrete and mortar as a gel material to improve its working performance. Slag powder is now a unique product widely used in construction projects, especially in concrete.

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Why Choose Slag Mill from AGICO

The slag vertical mill integrates fine crushing, drying, grinding, powder selection, and transportation. It has a simple process flow and has the remarkable characteristics of high grinding efficiency, strong drying capacity, easy control of product details, low noise, low power consumption, less wear, and low operating cost.

Vertical Roller Mill Customized for GGBS Production:

Slag for GGBS Production:

The blast furnace slag is used as the raw material for GGBS production, it is mainly composed of the following elements: SiO2, Al2O3, CaO, MgO, MnO, FeO, and S. Some slags contain trace amounts of TiO2, V2O5, Na2O, BaO, P2O5, Cr2O3, and others. In blast furnace slag, CaO, SiO2, and Al2O3 make up over 90% of the weight. After being finely powdered in a micro-powder mill, blast furnace slag is often used in cement production, significantly reducing the cost and complexity of producing high-quality cement.

How Slag Can Affect Concrete and Cement Performance

Micro Slag Powder is able to significantly enhance concrete performance. Adding fine powder slag to cement offers the advantages of reduced water exudation, improved plasticity, slow hydration heat release, and low hydration heat. This can effectively prevent large-volume concrete from cracking due to rising internal temperature.

Slag Grinding Equipment Other Options – Ball Mill

In recent years, there has been 2 production methods for micro-slag powder production: using a ball mill and a vertical roller mill, each with its own advantages and disadvantages. The ball mill method is a traditional process for slag grinding. It is featured with strong adaptability to materials, large specific surface area, better particle shape than vertical mill, simple maintenance, and cheap accessories. However, it occupies a large area, consumes a lot of electricity, and needs to dry the materials separately, which makes the process complicated. Vertical toller mill slag grinding is a system that has developed rapidly. The process is simple, and drying, grinding, and powder selection are all completed in the mill. It has low investment, low unit power consumption, and fast heat transfer, but it is more difficult to maintain than ball milling.
Now the comprehensive benefits of vertical roller mills in the cement industry due to their advantages in energy saving and consumption reduction have become increasingly obvious, and they have also been widely used and promoted in power, metallurgy, chemical, non-metal, and other industries.

Why Choose Vertical Roller Mill for Slag Grinding

Compared with a ball mill, the vertical mill has the following advantages:

Vertical Roller Mill For Slag Milling Process

• High Grinding Efficiency and Low Energy Consumption.
  The roller mill operates on the thick bed principle for grinding, resulting in lower energy consumption compared to the ball mill. The power consumption of the ground product is only 40-60% of that of the ball mill, however, the fan consumes more power. Overall, the power consumption of the entire grinding system is 10-20% lower than that of the ball mill system, and this reduction value increases with the increase of raw material moisture.
• Large Drying Capacity
  A significant amount of hot gas can be introduced, and the waste heat from the suspension preheating kiln and the kiln tail of the decomposition kiln outside the kiln can be fully utilized. The hot air enters from the annular gap at a high speed of 60-80m/s, leading to high drying efficiency. If a hot air furnace heat source is used, the raw material can also be dried when the moisture content is as high as 15-20%. In contrast, the maximum drying moisture content of a standard ball mill with a drying bin is 7%. When the moisture content of the raw material is excessive, the ball mill must adopt pre-drying measures.
  Furthermore, the material entering the mill has a large particle size, ranging from 50-150mm. Generally, the maximum particle size entering the mill can be calculated as 5% of the diameter of the grinding roller, so a large vertical mill can eliminate the need for secondary crushing.
• High Grinding Efficiency
  The chemical composition of raw materials can be quickly determined in the vertical mill system, ensuring uniform particle size distribution. Compared to a ball mill, the material spends only 2 to 3 minutes in the roller mill, allowing for rapid determination and correction of the raw material composition. The feeding system is equipment with automatic analysis and computer control, which can reduce homogenization costs and make the raw material composition more accurate. Additionally, the vertical roller mill can timely separate qualified fine powder, preventing over-crushing, which benefits the consistency of cement clinker burning.
• Compact Structure
  With compact structure design, the floor space occupied by a vertical mill is 50% of that of a ball mill, and for some projects, the capital construction investment is about 70% of that of a ball mill. It also has the advantages of low noise, less dust, and provides a more comfortable operating environment.
• Clean Production Environment: Low noise, less dust, and a comfortable operating environment.