In order to enhance the grinding efficiency of a cement ball mill, it is common practice to introduce dispersing agents in varying quantities. These agents include sodium silicate, sodium hydroxide, ammonium hydroxide, trisodium phosphate, sodium carbonate, sodium hexametaphosphate, potassium aluminate, and others. The addition of these substances helps to prevent particle agglomeration and improves the overall performance of the grinding process.
But why is the water separator an essential component in the operation of a cement ball mill? To better understand this, let’s look at an example. In an experiment involving the grinding of titanium dioxide using a cement ball mill, 1000 kg of titanium dioxide was mixed with 1000 kg of water. A quantity of 1500–2250 g of potassium hydroxide was dissolved in the water. This mixture was then processed in the ball mill, and the resulting slurry was transferred into a drum and diluted further. The concentration of titanium dioxide reached 200g/L, after which 2–3 liters of potassium hydroxide solution (750g/L) were added. The goal was to achieve maximum dispersion of TiO₂ in the slurry by monitoring its viscosity.
However, the particle size distribution in the slurry from the cement ball mill was uneven. This clearly demonstrates that cement ball mills cannot operate efficiently without a water separator. Coarse particles must be separated from the slurry using a hydraulic classifier and returned to the ball mill for further grinding. Commonly used water separators in cement ball mills include the Dow water separator, centrifugal continuous classifiers, or hydrocyclones.
The Da’er water separator is one of the widely used models. It consists of a cylindrical container with an inlet pipe, a rotating crucible in the center, and an overflow pipe on top. As the slurry flows through the system, finer particles exit through the overflow port, while coarser particles settle at the bottom and are continuously returned to the ball mill via rotation. This process is carried out continuously, ensuring consistent product quality.
It's important to note that the maximum particle size of titanium dioxide in the overflow should not exceed 6 microns. The overflow rate should be maintained at approximately 0.5 cm/min, with the working temperature ranging between 15–25°C. If the temperature increases, the overflow rate can be slightly higher. The titanium dioxide concentration in the overflow should be around 160–170g/L.
Zhengzhou Hengxing Equipment Co., Ltd. is equipped with advanced production and testing facilities. Every stage of the cement ball mill manufacturing process undergoes strict quality checks to ensure that all products meet the highest industry standards. With competitive pricing and a wide range of options available, the company offers reliable solutions for industrial grinding needs.
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[Image: Analysis of the state of the cement ball mill after adding the dispersant]
[Image: Analyze the state of the cement ball mill after adding the dispersant]
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