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Bauxite treatment method

A processing method and bauxite technology, applied in grain processing, solid separation, flotation, etc., can solve problems such as high cost and complex ore components, and achieve the effect of increasing electrostatic repulsion and preventing flocculation and agglomeration

Active Publication Date: 2021-06-11
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of new collectors is often high. At the same time, as the ore grade decreases, the ore components become more complex, which puts forward higher requirements for collectors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this example, the bauxite raw ore is directly flotation-processed. Put the bauxite raw ore into a ball mill, grind it until the particle size is -200 mesh, and account for 85%, and then transfer it to the stirring tank. The concentration of the prepared pulp (i.e., solid content) is 30%. , and then transferred to a 1.5L flotation tank for flotation desiliconization, adjust the pH of the pulp to 9.0 with sodium carbonate and add a collector to carry out flotation. The flotation collector is sodium oleate, and the dosage is 1200g / t raw ore, according to the conventional flotation operation, the recovery rate of alumina in the concentrate obtained by flotation is 75.39%, the recovery rate of silicon oxide is 50.43%, and the aluminum-silicon ratio of the concentrate is 8.02.

[0041] Following embodiment 2-25 carries out pretreatment earlier before bauxite flotation, and the method for processing is specifically:

[0042] The bauxite raw ore is mixed with the pretreatme...

Embodiment 26

[0055] This embodiment has all added pretreatment reagent before ore grinding and after grinding, and this embodiment adopts figure 1 The process shown is to treat bauxite. The pretreatment reagent used is mixed with oxalic acid and phenylalanine at a molar ratio of 10:1. The specific treatment method is as follows:

[0056] Mix the bauxite raw ore and the pretreatment reagent into the ball mill, the amount of the pretreatment reagent is 800g per ton of raw ore, and grind to a particle size of -200 mesh, accounting for 85%;

[0057] Transfer the minerals from the ball mill to the stirring tank, adjust the concentration of the pulp to 30%, then add the pretreatment reagent to the slurry, the amount of the pretreatment reagent is based on the minerals contained in the pulp, add 200g per ton of minerals, and then Stirring at ℃ for 2h;

[0058] After filtering, the obtained solids are washed to obtain pretreated bauxite minerals, and the obtained filtrate and washing liquid are r...

Embodiment 27

[0062] In this embodiment, a pretreatment reagent is added after grinding. The pretreatment reagent used in this embodiment is mixed with oxalic acid and phenylalanine at a molar ratio of 10:1. The processing method is specifically:

[0063] Put the bauxite raw ore into the ball mill, and grind it to a particle size of -200 mesh, accounting for 85%;

[0064] Transfer the minerals from the ball mill to the stirring tank, adjust the concentration of the pulp to 30%, then add the pretreatment reagent to the slurry, the amount of the pretreatment reagent is based on the minerals contained in the pulp, add 1000g per ton of minerals, and then Stirring at ℃ for 2h;

[0065] After filtering, the obtained solids are washed to obtain pretreated bauxite minerals, and the obtained filtrate and washing liquid are returned to be used as pretreatment reagents;

[0066] Prepare the pretreated bauxite minerals into 30% concentration flotation slurry, transfer it to a 1.5L flotation tank for f...

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Abstract

The invention belongs to the technical field of mineral flotation, and particularly relates to a bauxite treatment method. The bauxite treatment method comprises the step of pretreating bauxite, and the pretreatment step is to treat the bauxite by adopting a pretreatment reagent, and comprises the following steps: mixing raw bauxite with the pretreatment reagent, and carrying out ball milling; and / or, adding the pretreatment reagent into slurry obtained after raw bauxite is subjected to ball milling, and stirring and mixing, wherein the pretreatment reagent is a mixture of organic acid and amino acid. Starting from mineral interface regulation and control, the bauxite is pretreated by adopting the pretreatment reagent, so that the selectivity of a later collecting agent and target minerals can be enhanced, the action efficiency of the collecting agent can be effectively improved, the use amount of the collecting agent is reduced, the recovery rate of useful minerals is improved, and the flotation problem caused by complex mineral components is solved.

Description

technical field [0001] The invention relates to the technical field of mineral flotation, in particular to a processing method for bauxite. Background technique [0002] Flotation desiliconization is one of the effective ways for the efficient utilization of diaspore bauxite, and it is an effective method for the efficient utilization of medium and low-grade bauxite resources in my country. With the massive consumption of bauxite resources, the grade of currently selected bauxite has dropped sharply, resulting in an increase in the difficulty of flotation separation. [0003] To address the above challenges, a great deal of research has been done on bauxite flotation in recent years. At present, it is mainly by adding a new type of collector to improve the selectivity of the agent to different minerals, so as to improve the effect of bauxite flotation separation. However, the cost of new collectors is often high. At the same time, as the ore grade decreases, the ore compon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B02C17/00B03D101/02
CPCB03D1/018B02C17/00B03D2201/02Y02P10/20
Inventor 柴文翠曹亦俊李花霞
Owner ZHENGZHOU UNIV
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