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Method for comprehensively treating phosphorus-containing oolitic hematite and red mud

A technology for comprehensive treatment of oolitic hematite, which is applied in the field of comprehensive treatment of phosphorus-containing oolitic hematite and red mud, can solve the construction and maintenance costs of multiple storage yards, occupy large land and farmland, and waste metal resources, etc. Problems, to achieve great practical significance and social benefits, high product output value, high removal rate effect

Active Publication Date: 2014-12-03
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Red mud contains a large amount of iron, aluminum, sodium, calcium and other metals. The stockpiling of red mud not only takes up a lot of land and farmland, but also consumes a lot of yard construction and maintenance costs, causing serious water pollution and wasting a lot of waste. metal resources

Method used

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  • Method for comprehensively treating phosphorus-containing oolitic hematite and red mud

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Ore blending: oolitic hematite (TFe 43%, P 0.9%, Al 2 o 3 7%, SiO 2 22%) 48 parts, red mud (TFe 24%, CaO 14%, Al 2 o 3 13%, SiO 2 9%, Na 4%) 30 parts, bituminous coal 22 parts, mixed and broken to less than 5mm accounted for 96%,

[0050] Roasting: Metallized reduction roasting of crushed materials, the temperature is controlled at 1000°C, CO / CO in the flue gas in the furnace 2 =3.8, the residence time is 2h, the output calcined sand is cooled to 500°C by the heat exchange cooling cylinder, and then water quenched.

[0051] Ball milling and magnetic separation: Water-quenched calcined sand ball milling to less than 0.074mm accounts for 94%, after ball milling, the slurry is adjusted to a pulp concentration of 20%, and magnetic separation is performed at 1500 Oersted to obtain concentrate-like sponge iron powder (TFe 90%, P 0.13 %, Al 2 o 3 1.8%, SiO 2 3.0%), of which the iron selection rate was 92%, and the phosphorus removal rate was 90%.

[0052] Melti...

Embodiment 2

[0054] Ore blending: oolitic hematite (TFe 43%, P 0.9%, Al 2 o 3 7%, SiO 2 22%) 64 parts, red mud (TFe 24%, CaO 14%, Al 2 o 3 13%, SiO 2 9%, Na 4%) 16 parts, 20 parts of anthracite, mixed and broken to less than 5mm accounted for 95%,

[0055] Roasting: Metallized reduction roasting of crushed materials, controlled temperature 1150°C, CO / CO in the flue gas in the furnace 2 =4.0, the residence time is 0.5h, and the output calcined sand is cooled to 600°C by the heat exchange cooling cylinder and then water quenched.

[0056] Ball milling and magnetic separation: water-quenched calcined sand ball milling to less than 0.074mm accounts for 95%, after ball milling, the slurry is adjusted to a pulp concentration of 20%, and magnetic separation is performed at 1000 Oersted to obtain concentrate-like sponge iron powder (TFe 93%, P 0.14 %, Al 2 o 3 1.3%, SiO 2 2.8%), of which the iron selection rate was 93%, and the phosphorus removal rate was 91%.

[0057] Melting: Spo...

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Abstract

The invention discloses a method for comprehensively treating phosphorus-containing oolitic hematite and red mud, which is characterized by comprising the following steps: after mixing crude ore of the oolitic hematite, the red mud and coal according to a certain proportion, grinding and uniformly mixing; carrying out ore crushing and metallized reduction roasting; after slowly cooling the roasted product to a temperature of 400 to 750 DEG C, carrying out water quenching and shock cooling and carrying out ball milling on the water-quenched roasted product; carrying out magnetic separation on the ball-milled ore pulp to obtain similar sponge iron powder and tailings; and melting the similar sponge iron powder to obtain high-quality molten iron with phosphorus content of less than 0.01%. The method disclosed by the invention has a short flow, is continuous, is energy-saving, has high productivity, has high resource utilization rate and is environmental-friendly; the problems of high stacking construction cost of the red mud, high maintenance cost and the like can be solved; and the product can be used as a high-quality raw material for steelmaking and has high output.

Description

technical field [0001] A comprehensive treatment method of phosphorus-containing oolitic hematite and red mud, involving a phosphorus-containing oolitic hematite raw ore and waste red mud produced in the alumina industry after batching, metallization, reduction roasting-magnetic separation-melting Method for preparing molten iron. Background technique [0002] Oolitic hematite is extremely finely distributed, and often coexists or wraps with siderite, oolitic chlorite and phosphorus-containing minerals. It is currently recognized as one of the most difficult types of iron ore at home and abroad. Domestic oolitic hematite and limonite resource reserves are very large, the two resources add up to 6 billion tons, of which 1 / 9 of the iron ore resource reserves is oolitic hematite. Oolitic hematite often forms large-scale mines, such as the Lorraine iron mine in France, the Clinton iron mine in the United States, the Xuanlong iron mine in northern my country, and the Ningxiang i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B5/10C21B11/10
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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