Method for floating bauxite

A bauxite and flotation process technology, applied in flotation, solid separation and other directions, can solve the problems of shortening the flotation process flow, low efficiency of the feeding slurry pump, etc., to solve the problem of foam transmission, improve the beneficiation index, The effect of reducing the flotation time

Active Publication Date: 2013-03-20
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the above-mentioned prior art, and provide a method that can effectively solve the problems of bauxite flotation foam transmission and low efficiency of the feeding slurry pump, effectively stabilize the feeding mine pressure, and shorten the flotation process flow. , the bauxite flotation method to improve the beneficiation index

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The low-grade bauxite with A / Sfigure 1 , the specific process of its desiliconization is as follows:

[0019] Low-grade bauxite in Henan with a processing capacity of 2t / h in The ore is ground in a grid-type ball mill, and an appropriate amount of sodium carbonate dispersant is added to the mill. The grinding fineness of the obtained grinding product is -0.074mm, accounting for 78.6%. The grinding product is the overflow of the classifier into the raw ore pulp for stirring After the barrel is treated with flotation reagents including 80g / t adjuster and 400g / t collector, it is pumped into the non-drive flotation tank through the slurry pump for rough selection, and the rough-selected foam product enters the slurry tank. Under the action of the spray water, the low-grade ore pulp after the foam is partially digested and the high-grade mineralized foam that is difficult to digest after enrichment are obtained. The enriched mineralized foam floats on the pulp and passes th...

Embodiment 2

[0027] The low-grade bauxite in Henan Province with an A / S of about 4.2 was used as the test sample. The main chemical composition and phase composition of the raw ore are shown in Table 4 and Table 5, respectively. The principle process flow chart is attached figure 1 , the specific process of its desiliconization is as follows:

[0028] Low-grade bauxite in Henan with a processing capacity of 80t / h Grinding in a rod mill, adding an appropriate amount of sodium carbonate dispersant into the mill, the grinding fineness of the obtained grinding product is -0.074mm, accounting for 67.5%, and the grinding product is the overflow of the classifier into the raw ore pulp for stirring After the barrel is treated with flotation agent including 80g / t adjuster and 450g / t collector, it is pumped into the non-drive flotation tank through the slurry pump for rough selection, and the rough-selected foam product enters the slurry tank. Under the action of the spray water, the low-grade or...

Embodiment 3

[0036] Taking low-grade bauxite with an A / S of about 5.7 in Shanxi Jinnan as the test sample, the main chemical composition and phase composition of the raw ore are shown in Table 7 and Table 8, respectively. The principle process flow chart is attached figure 1 , the specific process of its desiliconization is as follows:

[0037] Low-grade bauxite in Henan with a processing capacity of 2.1t / h The ore is ground in a grid-type ball mill, and an appropriate amount of sodium carbonate dispersant is added to the mill. The grinding fineness of the obtained grinding product is -0.074mm, accounting for 56.8%. The grinding product is the overflow of the classifier into the raw ore pulp for stirring After the barrel is treated with flotation reagents including 80g / t adjuster and 300g / t collector, it is pumped into the non-drive flotation tank through the slurry pump for rough selection, and the rough-selected foam product enters the slurry tank. Under the action of the spray water,...

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Abstract

The invention relates to a method for floating bauxite, which is characterized in that: a froth product of grinding and rough concentration enters a pulp filtering tank and the enriched mineralized froth floats on the surface of ore pulp and overflows from the overflow opening of the pulp filtering tank to give a concentrate I; the defrothed impure ore pulp flows downwards, bottom-flow ore pulp enters a concentrating and floating tank under the action of a slag pulp pump, and a froth product of the concentration is used as a concentrate II; the bottom flow of the concentration returns to rough concentration operation, the bottom flow of the rough concentration is scavenged, the froth of the scavenged returns to the rough concentration operation, and the bottom flow of the scavenging is used as tailings; and the concentrate I and the concentrate II are combined to form the final concentrate. The method of the invention effectively solves the froth transport problem, stabilizes the ore pressure of the ore pulp feed and the floatation process, reduces the water consumption of the floatation system, improves floatation concentration, reduces the floatation time of qualified concentrate, improves equipment capacity, improves ore dressing indexes, reduces production cost and provides qualified bauxite concentrate material for the Bayer-process production of alumina.

Description

technical field [0001] A bauxite flotation method relates to a bauxite flotation desiliconization method. Background technique [0002] my country's bauxite reserves are abundant, but 80% of them are low- and medium-grade diaspore-type bauxite, and the economical and efficient Bayer process cannot be used directly to produce alumina. Pre-desilication is required to increase the aluminum content of bauxite. Silicon ratio. With the rapid development of the aluminum industry, high-quality bauxite resources have been drastically reduced, and flotation desilication as the most effective and economical pre-desilication method has become more and more important. As the ore grade declines, the beneficiation process will be diversified immediately, and the advantages of the positive flotation desilication technology of bauxite will become more obvious, but its characteristics are still large floating volume and high foam viscosity. [0003] The transmissionless flotation technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/02B03B1/00
Inventor 陈湘清周杰强陈兴华陈占华马俊伟张建强郭鑫胡秋云李花霞闫琨
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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