Method of processing manganese-containing and phosphorus-containing hematite

A processing method, hematite technology, applied in grain processing, chemical instruments and methods, solid separation, etc., can solve problems that have not been researched, and achieve good separation effect, good enrichment effect, and easy control

Inactive Publication Date: 2013-05-08
BEIJING GENERAL RES INST OF MINING & METALLURGY
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Problems solved by technology

However, a treatment process that is suitable for large-scale produ

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  • Method of processing manganese-containing and phosphorus-containing hematite

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Embodiment 1

[0039] Manganese-containing phosphorus-containing hematite raw ore (Fe 40%, MnO 5%, P 2 o 5 1%, Al 2 o 3 5%, SiO 2 20%) broken to less than 3mm accounted for 88%, mixed with 22% bituminous coal, mixed and granulated (particle size 30mm), the pellets were roasted at a constant temperature of 1000°C in the rotary kiln for 2 hours, and the flue gas CO / CO 2 4; the calcine is cooled slowly to 500°C with water quenching and rapid cooling, water quenching calcine ball milling, and the grinding particle size is less than 0.074mm, accounting for 87%; the mass concentration of the pulp is controlled at 20%, and the magnetic field strength is 1000 Oersted magnetic separation to obtain sponge-like iron powder (Fe 90%, P 0.1%, Al 2 o 3 1.5%, SiO 2 3.2%) and manganese-rich tailings (Mn 8%, Fe 6%); sponge-like iron powder was melted at 1550°C for 2 hours to obtain high-quality molten iron (P 0.005%, Mn 0.3%); manganese-rich tailings were diluted with 1mol / L Sulfuric acid leaching...

Embodiment 2

[0041] Manganese-containing phosphorus-containing hematite raw ore (Fe 35%, MnO 10%, P 2 o 5 1%, Al 2 o 3 9%, SiO 2 20%) broken to less than 3mm accounted for 90%, mixed with 20% bituminous coal, mixed and granulated (particle size 25mm), the pellets were roasted at 980°C for 3 hours in a rotary kiln, and the flue gas CO / CO 2 It is 3.9; the calcined sand is cooled slowly to 550°C with water quenching and rapid cooling, and the water quenching calcined sand is ball milled, and the grinding particle size is less than 0.074mm, accounting for 93%; the mass concentration of the pulp is controlled at 20%, and the magnetic field strength is 1000 Oersted magnetic separation to obtain sponge-like iron powder (Fe 91%, P 0.08%, Al 2 o 3 1.6%, SiO 2 3.3%) and manganese-rich tailings (Mn 9%, Fe 7%); sponge-like iron powder was melted at 1580°C for 1.5h to obtain high-quality molten iron (P 0.005%, Mn 0.2%); manganese-rich tailings used 1.2mol / L dilute sulfuric acid leaching, t...

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Abstract

The invention discloses a method of processing manganese-containing and phosphorus-containing hematite, relating to a method of comprehensively recovering iron and manganese in the manganese-containing and phosphorus-containing hematite. The method is characterized by comprising the steps in sequence: breaking crude manganese-containing and phosphorus-containing hematite, and then mixing evenly together with pulverized coal to prepare aggregate; conducting reduction roasting to the aggregate; conducting high-temperature water quenching and ball milling; conducting magnetic separating to obtain concentrate ferrous powder and tailings; conducting sulfuric acid leaching and filtration to the tailings, and purifying to remove impurities from the filtrate; and concentrating and crystallizing the purified filtrate to prepare manganese sulfate. The method is wide in applicability, the crude ore is not required for fine milling, coke and coking coal are not needed in the metallization roasting process, and the separation effect of Fe, Mn and P is good after roasting, ball-milling and magnetic separation; the manganese enrichment effect of the magnetically-separated tailings is good, and the concentrate manganese sulfate product is obtained by conducting sulfuric acid leaching through the conventional leaching agent, and conducting impurity removal and concentration and crystallization; and the equipment used in technological process is mature, the automation level is high, the control is easy, the environment pollution is small, and the product value is high.

Description

technical field [0001] A method for treating manganese-containing and phosphorus-containing hematite relates to a method for comprehensively recovering iron and manganese in the manganese-containing and phosphorus-containing hematite. Background technique [0002] At present, due to the continuous increase in the production capacity of my country's iron and steel products, the demand for ferroalloys has also increased sharply, but the ensuing pressure on energy, resources, and emissions is huge. , People are constantly looking for comprehensive utilization methods of low-grade manganese ore, manganese-containing iron ore, phosphorus-containing oolitic hematite and other lean ores. [0003] There are large reserves of manganese-containing hematite at home and abroad, but because the mineral contains manganese, phosphorus, and low-grade iron, it is easy to mine and difficult to separate, and it is not easy to separate manganese, iron, and phosphorus. The iron in this type ...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B5/10C22B47/00C21B11/10B03C1/00B02C21/00
Inventor 王成彦尹飞揭晓武何发钰陈永强阮书锋杨卜杨永强居中军李强王军张永禄邢鹏郜伟柳杨王振文
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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