Novel spontaneous heating material

Abstract

Disclosed is the manufacturing method of novel spontaneous heating material, which includes that: (1) the cast iron scrape iron is filtered to remove the impurities; (2) the cast iron scrape iron is machined to the iron powder of 100 mesh to 200 mesh in a ball mill; (3) the mixing ratio (weight ratio) of heat powder includes: 60% of cast iron powder, 10-15% of NaCl, 12-15% of activated carbon, 10-15% of vermiculite powder and 5-10% of tap water; (4) a common mixing device is adopted and the mixing time is less than three minutes; the spontaneous heating powder is prepared. The manufacturing method of novel spontaneous heating material has the advantages of low cost and convenient application.

Description

technical field [0001] The invention belongs to the technical field of self-heating materials and their applications, and in particular relates to a novel self-heating material. Background technique [0002] At present, the iron powder used in self-heating powder is generally expensive reduced iron powder. Due to its high price, the price of self-heating bags sold on the market is very high, reaching 70,000 / ton. The average consumer cannot bear it. [0003] At present, the utilization of cast iron scrap is mainly for remelting. That is, the iron filings are first pressed into blocks, and then returned to the furnace to be melted into molten iron. [0004] The disadvantages of remelting cast iron scraps are: on the one hand, due to the complex composition of iron scraps, it is difficult to control the composition of remelted molten iron, the casting rate is also low, and the tendency of molten iron to oxidize is serious. Many foundries are reluctant to use it, making this ...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of remelting cast iron scraps are: on the one hand, due to the complex composition of iron scraps, it is difficult to control the composition of remelted molten iron, the casting rate is also low, and the tendency of molten iron to oxidize is serious. Many foundries are reluctant to use it, making this precious Materials are piled up everywhere, polluting the environment

On the other hand, this utilization method makes it difficult to realize the value of cast iron scraps, such as its strong reducibility and easy crushing, etc., and the iron scraps are only sold at 600-700 yuan per ton