What are the misunderstandings in the use of ramming materials for intermediate frequency furnaces?

As we all know, the medium frequency furnace ramming material has a wide range of applications, whether it is cast iron, cast steel, cast copper, ductile iron, gray iron, ordinary carbon steel, high manganese steel, stainless steel, special steel, alloy steel, ferroalloy, alloy copper and other foundries , steel mills, iron mills, etc. will use the intermediate frequency furnace ramming material. There are many misunderstandings when using the intermediate frequency furnace ramming material. For example, some customers think that the choice of quartz sand to beat the charge should be made of white quartz sand. The raw materials are good, some think that the finer the better, and some say that only powder is needed and nothing else. These are all caused by the lack of understanding of the ramming material of the intermediate frequency furnace. Some are because the furnace age is felt after using the fine material. Yes, so I always choose fine materials instead of relatively coarse materials. This is a misunderstanding. Now, the main factors for quartz sand raw materials need to be investigated, one is the content of silicon and the content of 2 silicon oxide. 2 Silica must be more than 99 percent, and the higher the refractoriness, the better.

Now many use red quartz sand, because red quartz sand has high refractoriness. Generally, the refractoriness of quartz is 1760 degrees, while the refractoriness of red quartz can reach 1750 degrees. The refractoriness of white quartz sand is generally 1700 degrees. Iron filings are simply mixed into iron during quartz processing, so iron must be removed when producing ramming materials in an intermediate frequency furnace, otherwise it will easily cause the phenomenon of furnace penetration.

As for the ratio of quartz sand particles, the finer the better or the coarser the better. This should be analyzed in detail. For example, if it is a one-ton electric furnace, it will not affect the selection of slightly coarser particles, and the selection of finer particles can also be used. .Assuming it is a 40-ton intermediate frequency furnace and a 15-ton intermediate frequency furnace, it is not suitable to use very fine particles. For the same 1-ton electric furnace, both coarse and fine particles can be used, as long as the ratio and distribution are reasonable. It is mainly a problem of habit. .As the saying goes: 3 points for materials and 7 points for use. No matter how good the material is, if the furnace is not good, and the furnace age is the same, the use is not high. Therefore, when we use it, except for the intermediate frequency furnace ramming material should be appropriate In addition to purchasing from the manufacturer, the furnace must be strictly implemented in strict accordance with the instructions given by the manufacturer.