Novel method for producing iron ore pellet binder

Abstract

The invention relates to a production method of a novel iron ore pellet binder, which is characterized in that saponification emission dregs of propylene oxide by chlorohydrination used as main raw material are sieved, mixed and dried with 8 to 25 percent of water left and then are conveyed to a main and auxiliary materials premixed reactor; the saponification emission dregs of propylene oxide bychlorohydrination after drying treatment, 15 to 35 percent of calcium oxide (CaO) 4 to 5 percent of magnesium oxide (MgO) which function as basic oxygenation agent, 0.7 to 1.2 percent of Na2B4O5(OH)4.8H2O functioning as oxygenation agent borax and 0.3 to 0.7 percent of molybdenum oxide (MO) functioning as stabilizer active are fully mixed and agitated to remove harmful educts in the saponification emission dregs, and then powdery novel iron ore pellet binder with the particle size distribution of between 80 and 300 mesh is made after fine grinding. The production method is low in production cost, chemical solid emissions can be utilized as renewable resources, and secondary waste water and waste residues are not produced in the whole process, thus the production method is environmental-friendly production technology of a new generation of iron ore pellet binder.

Description

technical field [0001] The invention relates to a method for producing an iron ore pellet binder, in particular to a method for producing the iron ore pellet binder by using propylene oxide saponification discharge slag as a main raw material. Background technique [0002] Iron ore pellets are a method of agglomerating fine-grained iron ore concentrates, which is the result of the depletion of rich ore resources and the development and utilization of lean ore resources. Pellet is a high-quality raw material for blast furnace ironmaking. In the production of pellets in my country, there have long been problems such as coarse iron concentrate particle size, high water content, and high dosage of bentonite as a binder, which have seriously affected the economic benefits of pellet production in my country and the quality of pellets. At present, calcium hydroxide solution (commonly known as milk of lime) is generally used as saponifier in China. Some industrial enterprises produ...

AI Technical Summary

Problems solved by technology

The technical characteristics of using lime milk and calcium carbide mud as saponification agent are that the raw materials are easy to obtain, the technology is simple, and the operation is convenient, but there are disadvantages such as large amount of saponification discharge slag and serious pollution to the surrounding environment.

In addition, with the development of my country's iron-making industry, the demand for smelting raw materials --- pellet binder is increasing year by year. Bentonite is undoubtedly an effective pellet binder, which can not only improve the strength of green pellets and The bursting temperature can also control the moisture in the pelletizing process, so it is used by most pellet factories at home and abroad, but its main components are silicon dioxide and aluminum oxide, etc., and the pellets produced by it are acid pellets Mine has the disadvantages of reducing the taste of the blast furnace, increasing the coke ratio, increasing the amount of blast furnace slag, and reducing the output of the blast furnace

However, the production of pellets in my country has long-term problems such as coarse iron concentrate particle size, high water content, and high dosage of bentonite as a binder. The large proportion of bentonite dosage has seriously affected the economic benefits of pellet production in my country. and pellet quality

Images