Method for improving recovery of hematite and limonite

A technology of limonite and hematite, which is applied in the field of improving the recovery rate of hematite limonite, can solve the problems of only being used for magnetic ore, high recovery rate, and low recovery rate.

Inactive Publication Date: 2006-09-06
张志发
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Problems solved by technology

[0003] For above-mentioned situation and fully exploiting and utilizing magnetic weak hematite, limonite, the purpose of the present invention provides a kind of production method that improves hematite, limonite recovery rate exactly, can effectively solve hematite, limonite The problem of low ore recovery rate, the technical solution for it is to convert non-magnetic iron ore (Fe 2 o 3 ) processed into magnetite ore (Fe 3 o 4 ), and then use magnetic separation for mineral processing, because the recovery rate of magnetic separation is higher than that of gravity separation. It is an advanced mineral processing m

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Embodiment Construction

[0004] The specific implementation manners of the present invention will be described in detail below in combination with actual conditions.

[0005] As we all know, gravity separation and magnetic separation are two commonly used mineral processing methods in iron ore production. Gravity separation is mainly used for non-magnetic ore, and magnetic separation is mainly used for magnetic ore. It is a processing method for sorting the magnetic difference of two substances in an inhomogeneous magnetic field. The magnetic separation process is that after the solid matter is input into the magnetic separator, the magnetic particles are magnetized under the action of an inhomogeneous magnetic field, and thus are separated by the magnetic attraction force, while the non-magnetic particles are still separated due to the small force of the magnetic field. remain in the waste and are discharged. When solid particles pass through the magnetic field of the magnetic separator, they are si...

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Abstract

The invention relates the method for Improving the red hematite and brown hematite recovery ratio. The method of solving low recovery ratio of red hematite and brown hematite comprises the following steps: treating the non-magnetic iron ore to magnetic ore, and then dressing ore with magnetic method. The invention method comprises the following step: disintegrating the ore with crusher, high-temperature roasting, making it form magnetic ore, adding water, and then dressing ore with magnetic method. The method has the advantages of simple operation, high Fe2O3 ore recovery ratio and great economic benefit.

Description

1. Technical field [0001] The invention relates to a method for recovering ore, in particular to a method for improving the recovery rate of hematite limonite. 2. Background technology [0002] Iron ore is the main raw material for ironmaking, and its grade directly affects the output and quality of iron smelting. Iron ore has non-magnetic and magnetic types. Iron ore and limonite, due to their weak magnetic properties, can only be beneficiated by gravity separation, and the recovery rate of gravity beneficiation is low, generally less than 70% (recovery rate <70%), a large amount of Fe 2 o 3 Into the tailings are discarded, the grade of iron in the tailings can reach 20-30%, containing Fe 2 o 3 So many useful tailings are abandoned, which is a great loss of resources and a serious waste, which is very unfavorable to the production and development of the metallurgical industry of iron smelting. It not only increases the cost of iron smelting, but also causes unnecessar...

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Application Information

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IPC IPC(8): C22B1/14B03C1/02
Inventor 张志发
Owner 张志发
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