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A novel method for production of iron ore concentrates suitable for iron and steel making processes

A technology for iron ore and concentrate, applied in the new field of producing iron ore concentrate suitable for iron and steel manufacturing process, can solve the problems of loss, complicated process, unsuitable iron value, etc.

Inactive Publication Date: 2012-01-11
TATA STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these methods are not suitable for all types of ores and significant loss of iron value has been reported in tailings (lower recovery)
The process is also complex, with a series of unit operations, which also makes it less economically attractive

Method used

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  • A novel method for production of iron ore concentrates suitable for iron and steel making processes
  • A novel method for production of iron ore concentrates suitable for iron and steel making processes
  • A novel method for production of iron ore concentrates suitable for iron and steel making processes

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Experimental program
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Effect test

Embodiment

[0024] Weathered Magnetite (Iron Distribution - 50% Magnetite, 30% Hematite and 20% Goethite)

[0025] Experiments were carried out with the new method using magnetite containing 55-65% iron. In one trial, 1 ton of ROM was crushed and ground to a size of less than 1 mm and then processed with a drag-fall classifier. The experimental conditions are as follows: feed pulp density 20-30% by weight, feed rate 0.1-0.5t / hr, agitated bed pressure 0.04-0.09 bar, and agitated water flow rate 3-12LPM. Through this process, a concentrate with 64-67.5% Fe is obtained. Experimental results (falling classifier) ​​such as image 3 depicted in . The overflow fraction is processed in LIMS and / or HIMS and about 60% of the ore minerals are separated as magnetic fraction. The 64%-66% Fe underflow concentrate is also processed in the LIMS and / or HIMS to produce a +67% Fe grade concentrate.

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Abstract

A method for production of iron ore concentrates comprising the steps of: crushing low grade ore, slimes and other deposits to produce iron ore particle of the size less than 1.5 mm; subjecting the said particles to the step of selective separation to isolate iron ore mineral from gangue minerals; and obtaining enriched ore with high iron content from (60% to 67%) using low intensity magnetic separator (LIMS) and high intensity magnetic separator (HIMS).

Description

technical field [0001] The present invention relates to a new process for the production of iron ore concentrate from iron ore deposits, which is suitable for iron and steel manufacturing processes. Accordingly, the present invention further relates to the removal of gangue minerals present in ore bodies. These are achieved by employing the resistive fall classification technique followed by magnetic separators based on their physical properties. Background technique [0002] Usually the raw ore (ROM) iron ore mineral is not used directly in the iron and steel manufacturing process. In the past and until recently, deposits of high-quality iron ore were abundant worldwide. However, the exponential growth in world demand for steel is rapidly depleting such rich deposits. Therefore, in search of alternative sources of iron ore, the steel industry has been forced to use lean ore, tailings (slime) and other deposits with high iron content as raw material sources. But such dep...

Claims

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Application Information

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IPC IPC(8): C22B1/00B22F9/04B03B5/28B03C1/00
CPCC22B3/22B03C1/30C22B1/00Y02P10/20
Inventor C·R·库玛T·K·构施
Owner TATA STEEL
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