Novel method for producing iron ore pellet binder

A production method and binder technology, which is applied in the field of iron ore pellet production binder, can solve problems affecting the quality of pellets that affect economic benefits, reduce the taste of blast furnace, increase the amount of blast furnace smelting slag, etc., so as to shorten the drying time time, improve the grade, and improve the effect of green ball strength

Inactive Publication Date: 2010-09-29
辽宁中生洁源实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Novel method for producing iron ore pellet binder
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Embodiment 1

[0030] The specific ratio of raw materials used in the production of the iron ore pellet binder of the present invention is all in mass percentages, as follows: 75% of saponification discharge slag with 10% water content after drying, 20% of calcium oxide, 4% of magnesium oxide, and 0.7% of reinforcing agent borax , stabilizer active molybdenum oxide 0.3%, the above-mentioned raw materials are fully mixed in the main and auxiliary material premixing reactor 13 with the device and process method adopted by the present invention, and then reacted at 550 ° C for 20 min under normal pressure conditions, Then use the grinding machine 15 to finely grind to make a powder with a particle size distribution of 80-300 mesh, which is the iron ore pellet binder product of the present invention.

[0031] Adopt iron ore pellet binder product produced by the present invention to produce pellets, raw material composition is mass percentage, as follows:

[0032] (1) High-quality Shuangda iron p...

Embodiment 2

[0053] The specific proportioning of raw materials used in the production of iron ore pellet binder of the present invention is all in mass percentages, as follows: the raw materials taken include 63.5% of saponification discharge slag containing 20% ​​water, 30% of calcium oxide, 5% of magnesium oxide, and 1.0% of reinforcing agent borax %, stabilizer active molybdenum oxide 0.5%; the above-mentioned raw materials are fully mixed in the main and auxiliary material premixing reactor 12 with the device and process method adopted in the present invention, then at 650 ° C, reacted for 30min under normal pressure conditions, and then Finely grind with a grinder 15 to make a powder with a particle size distribution of 80-300 mesh, which is the iron ore pellet binder product of the present invention.

[0054] Adopt the iron ore pellet binder product that the present invention produces to produce pellet ore, raw material composition is as follows:

[0055] (1) High-quality Shuangda i...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/242
Inventor 伊东彪王铁山刘强孙向明李井辉文勤吴胜海吴波李润东
Owner 辽宁中生洁源实业有限公司
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