Method for separating aluminum and iron in high-iron bauxite

A technology of high-iron bauxite and bauxite, which is applied to the separation of minerals and the field of separating aluminum and iron in high-iron bauxite, can solve the problems of comprehensive utilization of aluminum and iron, and achieve low cost and high production efficiency. The effect of high efficiency and simple process

Inactive Publication Date: 2010-07-07
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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  • Application Information

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Problems solved by technology

At present, there is no comprehensive utilization method for high-iron bauxite magnetization roasting-magnetic separation separation of aluminum and iron

Method used

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  • Method for separating aluminum and iron in high-iron bauxite

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Effect test

Embodiment 1

[0018] High-speed iron bauxite in a province in China: Al 2 o 3 Content 49.76%, SiO 2 Content 4.9%, A / S=10.16, Fe 2 o 3 Content 28.23%;

[0019] The high-iron bauxite is crushed until the total particle size of the ore is less than 5mm, and then magnetized roasting is carried out. The conditions of magnetized roasting are: the weight of coke added is 25% of the total weight, the roasting temperature is 1030 ° C, and the roasting time is 4.5 hours; The roasted high-iron bauxite is ground until the ore particle size is less than 200 mesh and the weight accounts for 90% of its total weight; the magnetic field strength of the first stage of magnetic separation is 127.4 kA / m, and the bauxite and iron minerals are separated; The separated bauxite is subjected to strong magnetic separation under the condition of strong magnetic separation with a magnetic field strength of 717 kA / m, and the iron minerals are completely removed to obtain qualified bauxite; the separated iron concen...

Embodiment 2

[0022] High-speed iron bauxite in a province in China: Al 2 o 3 Content 51.06%, SiO 2 Content 4.15%, A / S=12.30, Fe 2 o 3 Content 29.01%;

[0023] The high-iron bauxite is crushed until the total particle size of the ore is less than 5mm, and then magnetized roasting is carried out. The condition of the magnetized roasting is 25% coke, the roasting temperature is 1030 ° C, and the roasting time is 4.5 hours; the magnetized roasted high-iron bauxite is processed by The ore is ground until the ore particle size is less than 200 mesh and the weight accounts for 90% of its total weight; the magnetic field strength of the first stage of magnetic separation is 160 kA / m, and the bauxite and iron minerals are separated; the separated bauxite is in the magnetic field Strong magnetic separation is carried out under the condition of strong magnetic separation with a strength of 1095 kA / m, and the residual iron minerals are removed again to obtain qualified bauxite; the separated iron ...

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Abstract

The invention discloses a method for separating aluminum and iron in high-iron bauxite, which comprises the following steps: (1) breaking high-iron bauxite; (2) carrying out magnetic roasting for the broken high-iron bauxite; (3) milling; and (4), separating the bauxite from iron minerals through weak magnetic separation, and respectively obtaining the bauxite and the iron minerals. Before the high iron bauxite is dissolved out, the magnetic roasting - magnetic separation process is adopted, so that the iron is separated from the bauxite containing high iron through the magnetic roasting - magnetic separation process, and the iron is removed from the bauxite after the magnetic separation through strong magnetic separation so as to obtain qualified bauxite concentrate, so that the high-iron bauxite is utilized well, and the bauxite and the iron minerals can be comprehensively utilized. The invention has the advantages of simple process, low cost, high yield, good product quality, safety and environment protection and the like.

Description

technical field [0001] The invention relates to a mineral separation method, in particular to a method for separating aluminum and iron phases in high-iron bauxite, and belongs to the technical field of mineral screening and separation. Background technique [0002] my country's high-speed iron bauxite reserves are very rich, mainly distributed in Henan, Guangxi, Shanxi and other provinces. The prospective reserves of high-speed iron gibbsite bauxite can reach more than 1 billion tons, and the reserves of high-speed iron diaspore bauxite are also It is very rich, and there are more than 100 million tons in a certain county in Shanxi alone. Since the content of iron oxide is above 10%, it is impossible to directly produce alumina by sintering method, Bayer method or combined method. Therefore, the separation of aluminum and iron must be carried out before these "sluggish" resources can be utilized. The iron in my country's high-iron bauxite mainly exists in the form of hemat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/015B03C1/02
Inventor 赵恒勤马化龙胡四春
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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