Rod mill sand making machine is a device used to grind ores. According to different working conditions, rod mill sand making machine performs different grinding work. Generally speaking, rod mill sand making machine is especially suitable for rough grinding. In the process of solid mineral processing and production, rod mill sand making machine is important equipment in the beneficiation process. It is mainly used in the fine crushing and coarse grinding of ore in the first stage of open-circuit grinding. When involved in fine crushing, it is generally used to replace short cones. The crusher is used more in rough grinding and is very suitable for the treatment of brittle materials. The grinding medium of the rod mill sand making machine is a long round steel rod. The diameter of the steel rod currently used is generally between 75 and 150 mm and the length is not more than 7 meters.
The steel rod is lifted to a certain height by the drum of the rod mill sand making machine and then freely thrown down. During the falling process, it impacts and grinds the minerals. The linear contact between the long round steel bars is similar to the function of the bar screen. The fine minerals will pass between the steel bars, so that the grinding action of the steel bars mainly falls on the coarse materials, which gives rise to selection. The selective grinding effect makes the particle size of the mill products more uniform, better avoids the phenomenon of over-crushing, and reduces the waste of useful minerals. It is suitable for the grinding of rare metal ores. In addition, when the grade of the ore is when there is a correlation with particle size, such as iron ore, the finer the particle size, the higher the grade, which is also an important application of selective grinding.
At present, rod mill sand making machines are widely used, and are widely used in coal chemical industry such as coal water slurry preparation, quartz sand, silica sand, sand aerated, tungsten ore, potash albite, bauxite and other industries. For the refractory, chemical, metallurgical, glass and other industries and the grinding operations that require relatively high uniformity of the finished product after grinding, generally rod grinding sand making machines are used. But what exactly is the working principle of the rod mill sand making machine?
The working principle of the rod mill sand making machine is introduced in detail: When the rod mill sand making machine is working, the cylinder is driven by the reducer and the surrounding large gear reduction transmission or the low-speed synchronous motor directly through the surrounding large gear reduction transmission rotary movement. There is a suitable grinding medium-steel rod in the barrel. Under the combined action of centrifugal force and frictional force, the grinding medium is brought up to a certain height and falls in a thrown or leaked state. The raw material enters the barrel continuously from the feed port, is crushed by the moving grinding medium, and the product is discharged out of the machine under the force of continuous feeding, and the next stage of processing operation is carried out.
Rod mill sand making machine has the following advantages:
1. The output particle size of the rod mill sand making machine is uniform and the output is high.
2. There are many types of rod mill sand making machines, and a reasonable choice is made according to different materials.
3. There are two types of rod mill sand making machine, dry type and wet type. Choose according to your actual situation. The working principle of the rod mill sand making machine endows the rod mill sand making machine to be suitable for many large industries or production lines. In order to avoid the hazards caused by over-crushing, rods are often used in the gravity separation or magnetic separation plants of tungsten tin ore and other rare metal ores. Grind the sand machine to grind the ore. When used in the second-stage grinding process, if the first stage is grinding from 20-6mm to 3~1mm, the rod mill sand making machine is used as the first-stage grinding equipment, which has large production capacity and high efficiency. When used in the second stage of fine grinding, the productivity and efficiency of rod mills are lower than that of ball mills;
4. Sometimes rod mill sand making machine can replace short head cone crusher for fine crushing. When dealing with less hard ores and grind 19-25mm ore to 6-10mm, the rod mill sand making machine and the sieve in a closed circuit have a simple configuration, low cost, and can simplify the dust removal in the crushing workshop. For hard ore, a more economical method is to use a short-head cone crusher and a sieve to form a closed circuit. Whether a ball mill or a rod mill sand making machine should be used in the design can only be determined according to specific conditions.
