Vertical roller mill

High-quality Magnesium slag vertical roller mill manufacturer

Tongli magnesium slag vertical roller mill is a large vertical grinding equipment specially designed for grinding magnesium slag into fine powder. It is used for by-product treatment in magnesium metal smelting industry. The mill adopts advanced grinding roller and grinding disc design, which can effectively crush large pieces of magnesium slag into fine particles and improve its utilization value. Its grinding capacity can usually reach 10-50 tons per hour, depending on the equipment model and material characteristics. The working principle of the vertical mill makes the material stay on the grinding disc for a short time, reducing the heat generation, thereby avoiding changes in the heat-sensitive components of the magnesium slag.

magnesium slag grinding vertical roller mill profile picture1 by tongli heavy machinery

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The grinding roller of Tongli magnesium slag vertical mill has low running resistance and low energy consumption. The conical grinding roller of magnesium slag vertical mill has an inclination angle to the grinding disc. The grinding roller and the grinding disc are mainly rolling friction during the pressurized grinding process, while the rolling resistance of the large-diameter grinding disc is very small, so the unit energy consumption is low. The composite roller sleeve has good processability and weldability and long service life. The crank arm loading, the swing crank arm that is responsible for the fixing and guiding of the grinding roller is located outside the cylinder of the vertical mill.

Better loading system

The design of the spring loading system buffer of the liquid-gas combination of the magnesium slag vertical mill ensures that there is no metallic contact between the roller grinding parts during the entire operation of the vertical mill.

Targeted design

Grinding rollers of different specifications and quantities are designed according to different production capacity requirements, including auxiliary rollers to enhance the stability of the material bed. The 2+2 (3+3) grinding roller design is more suitable for grinding slag.

Horizontal grinding disc, center unloading, uniform distribution

The grinding material layer of Tongli magnesium slag vertical mill is only 20-30mm, and the particles are easy to be crushed. The annular nozzle around the grinding disc is specially designed to reduce the ventilation resistance of the nozzle to prevent the upward blowing of the nozzle from causing wear on the grinding roller and other parts. For the mineral powder vertical mill, the annular nozzle is set up with a bypass device, which can separate the iron parts from the discharge chute without air flow, and then be discharged by the metal separator, so as to minimize the wear of the internal parts of the vertical mill.

Model SpecificationGrinding Disc Diameter D (mm)Roller Diameter D (mm)Number of Rollers nStandard Installed Power P (kW)Standard Capacity Q (t/h)
TLZJ33.31330017003160045
TLZJ35.41350018004180060
TLZJ40.41400019004224070
TLZJ43.41430021204280090
TLZJ46.414600224043150105
TLZJ48.414800224043550125
TLZJ50.415000236043800140
TLZJ53.415300250044200150
TLZJ56.615600250065000160

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FAQ

1.What are the main components of magnesium slag?

Magnesium slag is primarily composed of magnesium oxide (MgO), silicon dioxide (SiO2), and calcium oxide (CaO). The typical composition distribution is as follows: MgO 65-75%, SiO2 8-12%, CaO 5-8%, Al2O3 1-3%, and Fe2O3 0.5-1.5%.

The composition of magnesium slag can vary depending on its source; for instance, some magnesium slags may have MgO content as high as 80-85%. Additionally, magnesium slag may contain trace amounts of heavy metals such as nickel (Ni) and chromium (Cr), typically not exceeding 0.1%. It is important to note that the chemical composition of magnesium slag can influence its subsequent processing and applications.

For instance, slag with high MgO content is better suited for producing refractory materials, while slag with high SiO2 content is more appropriate as a raw material for construction.

2.How does the magnesium slag vertical mill impact the activity of magnesium slag?

The magnesium slag vertical mill can significantly enhance the activity of magnesium slag. Typically, the 28-day activity index of products from the vertical mill can reach 85-90%, which is 15-20% higher than that of products from a ball mill.

This increase in activity is primarily due to several factors: 1) finer particle size, with the 325 mesh product having a specific surface area of 450-500 m²/kg; 2) a more uniform particle size distribution, with a coefficient of variation between 0.8-1.0; and 3) a greater number of angular particles that increase the reactive surface area. High-activity magnesium slag powder performs excellently in applications;

for example, when used as a concrete admixture, it can improve the 28-day compressive strength by 8-10%, enhance impermeability by 20-25%, and improve sulfate resistance by 30-35%. However, it is worth noting that activity is also influenced by factors such as raw material composition and grinding temperature, which can lead to a 5-8% variability in actual production.

3.How does the magnesium slag vertical mill handle magnesium slag with different moisture contents?

The magnesium slag vertical mill has good adaptability to magnesium slag with varying moisture content. It can typically process slag with moisture content up to 12-15% directly without the need for additional drying.

For slag with moisture content between 15-20%, it can be accommodated by adjusting the hot air temperature (usually between 80-100°C), although the production capacity may decrease by 10-15%. When processing dried magnesium slag with moisture content of 6-8%, the capacity of the vertical mill can increase by 5-8%. It is important to note that for every 1% increase in moisture content, energy consumption increases by approximately 0.5-1 kWh/t. For example, processing magnesium slag with 15% moisture content compared to 8% moisture content could lead to an increase in energy consumption of 3.5-7 kWh/t.

Nonetheless, the total energy consumption of the vertical mill remains 15-20% lower than that of ball mills. Additionally, the drying capability of the vertical mill can be utilized to regulate the product temperature, maintaining it between 60-70°C, which is beneficial for subsequent applications.

4.How is the market demand for magnesium slag?

With the rapid development of the construction industry and infrastructure projects, the market demand for magnesium slag, which serves as a high-quality mineral admixture, is gradually increasing.

Particularly in cement production, the use of magnesium slag can enhance the strength and durability of cement, aligning with the trend of green building. According to market research, the demand for magnesium slag is expected to grow at an annual rate of 5-7% in the coming years.

Furthermore, the application of magnesium slag in soil improvement and agricultural production is gaining increasing attention, especially in the context of sustainable and ecological agriculture, indicating a broad market potential for magnesium slag.

5.What are the storage conditions for magnesium slag?

The storage conditions for magnesium slag should consider moisture protection and contamination prevention. Since magnesium slag contains some moisture (typically up to 10%), it is important to avoid direct contact with water sources and humidity during storage to minimize moisture content.

The storage environment should also be well-ventilated to prevent water accumulation and mold growth. Moreover, magnesium slag should be stored in a dry place with suitable temperatures, utilizing sealed storage or covering the material to prevent weathering and contamination.

Regular inspections of storage conditions are necessary to ensure the quality of magnesium slag and its performance in subsequent applications.

6.What are the applications of magnesium slag in construction materials?

Magnesium slag has a wide range of applications in construction materials, primarily used as a mineral admixture. In cement production, magnesium slag can significantly enhance the strength and durability of cement, improving its crack resistance and impermeability. The incorporation of magnesium slag often leads to notable increases in both early strength and 28-day strength, making it particularly important for producing high-performance concrete.

Additionally, magnesium slag can be used in the production of lightweight building materials and insulating materials. Due to its favorable mechanical properties and low density, magnesium slag is effective in manufacturing lightweight bricks, insulation boards, and similar products. Moreover, magnesium slag is applicable in road construction and soil improvement, enhancing the physical and chemical properties of soil and increasing soil fertility and drainage capability.

With the promotion of sustainable and green building concepts, the demand for magnesium slag as an eco-friendly and efficient construction material is gradually rising. Utilizing magnesium slag not only helps reduce the environmental impact of cement production but also contributes to the rational use of resources, aligning with the sustainable development goals of modern construction.

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Magnesium Slag

Magnesium Slag

Magnesium slag, a by-product of magnesium production, can be efficiently ground and used in construction materials, cement production, and as a high-value industrial by-product for various applications.

Dolomitic Slag

Dolomitic Slag

Dolomitic slag, produced during the refining of dolomitic ores, can be ground effectively and used in cement, construction, and as a soil amendment to improve soil quality.

Zinc Slag

Zinc Slag

Zinc slag, generated from zinc extraction processes, can be ground using vertical mills and utilized in cement manufacturing, waste management, and as a valuable component in various industrial products.

Ferroalloy Slag

Ferroalloy Slag

Ferroalloy slag, produced during ferroalloy manufacturing, can be processed by vertical mills to create fine powders, which are used in the production of cement, road materials, and other industrial applications.

Limestone Slag

Limestone Slag

Limestone slag, derived from the refining of limestone ores, is ground using vertical mills for use in cement production, aggregate, and other construction applications.

Steel Slag

Steel Slag

Steel slag, a by-product of steelmaking, can be ground in vertical mills and used in cement production, construction materials, road-building, and as an aggregate for various industrial purposes.

Copper Slag

Copper Slag

Copper slag, a by-product of copper smelting, is finely ground by vertical mills and used as a substitute for sand in construction and as a valuable material in cement and other industrial applications.

Titanium Slag

Titanium Slag

Titanium slag, produced in the extraction of titanium, can be efficiently ground in vertical mills and used in high-performance materials, cement production, and various industrial applications requiring titanium-based compounds.

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