If a covering agent is added during smelting to protect the alloy, the amount of air intake is greatly reduced. Refining the aluminum melt can effectively control the hydrogen content in the aluminum melt. The production of stainless steel shots is different from ordinary cast steel shots, because stainless steel is relatively easy to oxidize at high temperatures. Once oxidized, it is difficult to remove the scale on its surface by other methods. Therefore, at the time of production, it is required to remove the factors that cause the oxidation of the stainless steel pellets. Because of the special requirements of stainless steel shots, the equipment used to make stainless steel shots is special. Stainless steel shot making device is the core equipment for making stainless steel shot. It is specially designed and manufactured according to the production characteristics of stainless steel shot. The entire stainless steel pellet production system is composed of the following parts. In accordance with the production sequence of stainless steel pellets, the intermediate frequency furnace, tundish, atomization, stainless steel pellet collection, ingredient detection, pill separation, grading, weighing and packaging, and storage. The production principle of stainless steel pellets, stainless steel is an alloy that is easily oxidized in the liquid state, although its corrosion resistance at normal temperature is quite good. There are several methods for making stainless steel shots. Now the most common one is to cut stainless steel shots. It uses a wire cutter to cut stainless steel wire of a certain diameter to obtain stainless steel shots with the same diameter and length. . Stainless steel shredded pills are produced by people all over the country, and the output is quite large, but because of the high cost of raw materials and many people, the profit has been declining. The other is the production of stainless steel pellets by the atomization method. There have been successful examples in this field abroad, and large-scale production has been industrialized. Most of the imported stainless steel pellets are produced by the atomization method. Some people in China have also adopted the atomization method for production and have achieved success. Their products have entered the market. It is said that users are satisfied with their use and the order quantity is rising. The current domestic supply of stainless steel pellets, except for the agent, is mainly concentrated in Jiangsu and Zhejiang. The process of making stainless steel pellets by the atomization method is like this. First, the stainless steel material is heated in a metal melting furnace to melt it into a metal liquid in the furnace, and then the metal liquid is poured into the atomizing device. The key parts of the stainless steel shot atomizing nozzle, the high-pressure high-speed atomizing medium coming out of the atomizing nozzle, impact the molten metal liquid, and use the right metal liquid to disperse into countless fine metal droplets. These metal droplets are in the process of landing , And quickly condensed into small metal particles, if the particles are spherical, it is the product we need-stainless steel pellets. There are many atomization media that can be selected. Various liquids and gases. Considering the source of the atomization media, whether it is easy to obtain, and the price of its purchase, the impact on the quality of the product, the most used is water or air. Because the heat capacity of water is much larger than that of air, the same metal can easily produce irregular metal particles if water is used as the atomizing medium, and if it uses air as the atomizing medium, it is easy to produce round metal Particles. As mentioned earlier, stainless steel is quite stable at room temperature and is not easy to oxidize. You can also get this from the name it has. But in the case of high temperature, especially in the temperature range from liquid to solid, it is very easy to oxidize. If open-spray atomization is used, it means that after the metal liquid is crushed with an atomizing medium, no measures are taken to allow it to naturally cool in the air, and oxidation quickly occurs on the surface of the stainless steel particles. The resulting stainless steel pellets must be Black, the black thing is the product formed by the oxidation of stainless steel, if the steel shot is made, the user will not want it. Some people think that the post-treatment method can be used to strip the scale of the stainless steel pellets, but the result of the trial is not satisfactory. For example, using a shot blasting machine, through the shot blasting process, the surface of the skin is polished off. The result of the processing is that this layer of skin is very strong, and it takes a long time to kill it. In other words, even if you can kill it, the cost is very high, and it is equivalent to what you give the user. Stainless steel shot. In addition, some people want to use chemical cleaning methods to treat stainless steel pellets and peel off this layer of oxide scale. This involves environmental protection issues. In this way, a large amount of wastewater will be generated, and the production cost will increase a lot. No suitable chemical stripping recipes and processes have been found. Through the above analysis, you must have concluded that if you want to make stainless steel pellets, it should be made by gas atomization. At the same time, certain protective measures should be adopted in the production to make stainless steel powerful in the liquid and solid oxidation section. The protection is not oxidized or only a small amount of oxidation. Through the data obtained from abroad and the years of experience in the production of various metal powders by the atomization method, it is concluded that the use of the gas atomization method to produce stainless steel pellets is the correct choice for large-scale production of stainless steel pellets. The equipment used to make stainless steel pellets by gas atomization is similar to the equipment used to make metal powders. A furnace for melting metals is essential. In order to ensure that the stainless steel does not oxidize during atomization, inert gas must be used as the atomization medium. During the atomization process, the atomization environment must be protected so that it is carried out in an oxygen-free or low-oxygen environment. After the metal oxidation is over, the other processes are similar to the production of cast steel shots. The following is a detailed description of the entire stainless steel shot production equipment and china Brass gaskets process for users to refer to and execute in the production process: Choice of metal materials: The production material of stainless steel shots is of course stainless steel, but there are two methods for preparing stainless steel. Species are prepared using metal or alloy raw materials. Since metal or alloy raw materials usually have a lower purchase limit, the cost of stainless steel pellets produced from stainless steel raw materials formulated with purchased raw materials is relatively high. The second is to select stainless steel scrap for the production of stainless steel pellets. Stainless steel scraps are available everywhere, and the problem is not big, and the cost is much lower than the raw materials prepared by the first method. Anyone who produces stainless steel metal powder is actually selected from stainless steel scrap for production. The profit obtained by the manufacturer is the difference in raw materials and the value-added of the product between the first method and the second method. If there is no difference in raw materials, the value-added products alone do not make much profit.When buying stainless steel waste, there are a few points that need to be noted. The purchased waste should have a clean appearance.This is one. Secondly, the stainless steel scrap purchased should be of the same brand provided by the same supplier, that is to say, this material should be the manufacturer of the scrap, and buy in bulk from the scrap formed after use. For example, it is bought in batches to produce stainless steel tableware. The brand is 304. This product from the same supplier at one time is accompanied by a warranty book. The warranty book will contain the chemical composition range of the batch of materials, or there are clear materials. With the grade of the material, you can easily check the range of its chemical composition. Only if the ingredients are clear, can you accurately judge whether the stainless steel shots you produce are qualified. In addition to manufacturers of stainless steel daily necessities, there are also manufacturers of stainless steel tubes that can provide uniform materials throughout the batch. It should be said that this tube material is better than sheet material. This is because the surface area of sheet material is relatively high. Larger, more slag is formed during melting. If funds allow, you can buy more scrap at a time.Purchased stainless steel scrap should be treated before use, and should not be directly melted into the furnace without treatment. The treatment of stainless steel waste has the following points: First, the non-stainless steel materials mixed in the waste are removed. This is mainly judged by the magnetic separation method. Anything that cannot be absorbed by the strong magnet is stainless steel, and the rest are excluded.Second, after the magnetic separation treatment, according to the cleanliness of the surface of the waste, cleaning treatment is carried out. If oil or other debris sticks to the surface of the material, it must be removed. The cleaned materials should be dried before they can be used. The treated material should be clean on the surface, free of oil stains and impurities, and dry on the surface without moisture.3. For materials with large length or width, they must be cut to a size that can be put into the furnace in advance.Fourth, the processed materials are stored in a dry warehouse for future use. Except for smelting
