Flotation machine impeller cover material
Writer： admin Time：2020-08-06 13:53 Browse：℃
At present, the commonly used materials for the impeller cover of flotation machine mainly include cast iron impeller cover, nylon impeller cover, polyurethane impeller cover and rubber impeller cover. How to choose these impeller cover materials?
The impeller and cover plate of the flotation machine are the main components of the flotation machine equipment. During the operation of the flotation machine, the impeller and cover plate have the same self-priming slurry function as the slurry pump. It is precisely because the impeller and cover plate of the flotation machine have the function of self-priming pulp (or self-aspiration), its impeller and cover plate are worn out and have a short lifespan, so they need to be replaced frequently. Therefore, how to select materials with good wear resistance for the impeller and cover of the flotation machine is of great significance.
1, cast iron impeller cover
Cast iron impeller cover is one of the commonly used materials for early flotation machines. Its advantages are high hardness and high wear resistance, but its brittleness is large, so it cannot withstand impact loads and has poor corrosion resistance. During the flotation process, due to The impact and abrasion of the material, coupled with the corrosion of the flotation agent, result in a shorter service life of the cast iron material and a high frequency of replacement. Generally, the impeller liner is replaced once a quarter.
After the cast iron impeller cover plate is used for a period of time, due to severe abrasion, the gap between the impeller and the cover plate will increase, which will cause insufficient aeration of the flotation machine and insufficient stirring strength, and eventually the flotation machine slurry will not flow smoothly. Flotation liquid level "turning over" and other phenomena.
Due to the poor comprehensive utilization rate of cast iron impeller cover, it has been gradually eliminated. It is now mostly used for nylon impeller cover, polyurethane impeller cover and rubber impeller cover.
2, nylon impeller cover
The nylon flotation machine impeller cover plate has the advantages of high mechanical strength, high hardness, high toughness, high hardness, good mechanical damping ability, good sliding property, good wear resistance and aging resistance. The main one is nylon flotation machine. The impeller cover plate has good resistance to strong acid and strong alkaline materials. For the flotation process using acid-base mineral beneficiation reagents, nylon flotation machine impeller cover plates can be preferred.
3, polyurethane flotation machine impeller cover
Polyurethane is a kind of high-strength wear-resistant material. It has the high elasticity of rubber and the special strength of plastic. It is selected as the material of the flotation machine impeller cover, which can effectively extend the life of the flotation machine impeller cover. Compared with cast iron materials, the life cycle of polyurethane can be extended by 5-6 times. Polyurethane is very resistant to oil. For the flotation of molybdenum ore, when kerosene is used as a flotation agent in the flotation operation, the impeller cover of the polyurethane flotation machine is more suitable.
4, rubber flotation machine impeller cover
The impeller cover made of rubber is mostly made of wear-resistant rubber. The wear-resistant rubber impeller cover mainly adopts a new type of "liquid nano-formulation? Normal temperature high-frequency curing" glue making process, which has good effects in terms of wear resistance, resilience, and tear resistance, and its wear resistance index reaches 128 %, the rebound reaches 80%, the tensile strength reaches 23.5MP, and the tear strength reaches 168N/mm.
The wear-resistant rubber impeller cover has strong tear resistance and wear resistance. It is relatively weak in the treatment of strong corrosive materials. Therefore, metal and non-metallic mines other than corrosive materials or chemicals can be selected for wear resistance Flotation machine impeller cover made of rubber material.
The advantages and selection directions of the impeller cover plates of cast iron, nylon, polyurethane and rubber mentioned above are for reference and learning only. In actual selection, beneficiation tests are required to determine the final beneficiation process and beneficiation reagents. It is necessary to consider comprehensively and then select a flotation machine impeller cover that meets the conditions.
The flotation machine impeller and the flotation machine impeller cover are made of cast iron, alloy materials, polyurethane, wear-resistant rubber and other materials. Many wear-resistant materials have guessed that wear-resistant rubber has achieved outstanding wear resistance. Strong pursuit of customers! Practice and research indicate that the use of wear-resistant rubber materials as impeller and cover material has the following benefits:
1. Long service life. The use of conventional cast iron and other materials can not have both corrosion resistance and impact resistance. For example, although cast iron materials are resistant to corrosion and abrasion, they are brittle and have poor ability to withstand the impact of solid particles. During the rotation of the impeller, solid particles have a severe impact on the impeller and cover plate. The service life of the impeller cover plate of cast iron material is not long. long. The impeller and cover plate made of wear-resistant rubber material together have the functions of corrosion resistance and impact corrosion resistance, which greatly extend the service life of fragile flotation machine components.
2. The amount of maintenance and replacement of the impeller cover of the flotation machine is small. In order to ensure the normal operation of the flotation machine, the impeller and cover plate need to be replaced and overhauled in time. The impeller and cover plate of cast iron and other materials have a short service life and a large amount of overhaul and replacement. The impeller and cover plate made of wear-resistant rubber materials have a long service life, so the amount of maintenance and replacement of the impeller and cover plate is small.
3. It has little impact on production policy and production process. The impeller and cover plate made of cast iron and other materials will be worn for a period of time, and the gap between the impeller and cover plate will become larger, and the stirring strength and circulation degree of the flotation machine will be lacking, which will affect the flotation policy. , And because the impeller cover plate of cast iron and other materials needs to be replaced frequently, it will delay the flotation process. The impeller and cover plate made of wear-resistant rubber materials have little impact on the production policy and production process due to their good wear resistance and long service life.
4. The input cost of spare parts such as impeller cover plate is low. The impeller and cover plate made of cast iron and other materials require a lot of spare parts due to their short service life, and the scrap rate of components is also high, so the production cost is high. However, the impeller and cover plate made of wear-resistant rubber materials have a long service life, so the input cost of spare parts such as the impeller cover plate is low, which is beneficial to reduce the flotation cost.
The flotation machine is the most important equipment for flotation operations, and the impeller and cover plate are the main operating parts of the flotation machine. During the operation of the flotation machine, the impeller and cover plate have the same self-priming slurry function as the slurry pump. However, it is precisely because the impeller and cover plate have the function of self-priming pulp (some self-priming air), therefore, the impeller and cover plate are classified as fragile parts of the flotation machine, and the service life is generally short and needs to be replaced frequently. Therefore, it is of great significance to select wear-resistant materials with excellent wear-resistant properties as materials for fragile flotation machine components.
What are the advantages of polyester ammonia?
Polyurethane materials have excellent wear resistance and comprehensive physical and mechanical properties, and have been widely used in various mining machinery and equipment, such as flotation machines, ore dressing tanks, cyclones, etc., and their service life is longer than ordinary rubber or ordinary steel parts. -8 times. It has acid and corrosion resistance. It is based on the excellent wear resistance and the ability to extend the service life, making it the main material of the flotation machine impeller and cover plate, which can not only reduce the amount of steel skeleton of the ordinary rubber impeller and cover plate of the flotation machine, but also improve the impeller, The thickness of the wear layer of the cover plate. Because of its light weight, it is conducive to replacement and installation, so it greatly reduces maintenance man-hours and costs, ensures the continuous production, and saves manpower and financial resources.
The service life of flotation machine impeller cover plate and other wearing parts is increased, and the overall performance of the flotation machine is improved. It is your ideal choice.
