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Method for reverse-floatation mud-removing for bauxite

A bauxite and reverse flotation technology, which is applied in flotation, selective deposition, solid separation, etc., can solve problems such as poor selectivity, unfavorable reverse flotation, and changing the buoyancy of compositional minerals

Inactive Publication Date: 2007-04-18
XIAOYI TIANZHANG ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Greatly changed the buoyancy of each constituent mineral, which is extremely unfavorable for subsequent reverse flotation
3. Using polyacrylamide and its derivatives or caustic starch as flocculant has poor selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the experiment, hard kaolinite and diaspore pure minerals were selected, and they were crushed with a ceramic disc crusher until the grain size of -0.074mm accounted for 60%. The former took 1g, and the latter took 2g, and mixed them as raw ore; Clear water, stir evenly on a magnetic stirrer, the solid weight concentration of the pulp is 15%, add Na 2 CO 3 7Kg / t- 原矿 , pulp pH9.9; add catechol 300g / t- 原矿 , stirring for 3min; adding phosphatized starch 60g / t- 原矿 , stirred for 3 minutes; settled still, and used the siphon method to extract the -10μm part for the first desliming; supplemented with clean water, adjusted the solid weight concentration of the pulp to 10%, and then added Na 2 CO 3 3Kg / t- 原矿 , pulp pH 11.0; add catechol 200g / t- 原矿 , stirring for 3min; adding phosphating starch 20g / t- 原矿 , stirred for 3 minutes; static settling, and the -10 μm part was extracted by siphon method for the second desliming; the two deslimed muds were combined and dried for...

Embodiment 2

[0022] Choose bauxite raw ore. After the bauxite is crushed, use wet grinding in the ball mill, and grind to -0.074μm, accounting for 80%; add water, stir evenly on a magnetic stirrer, the solid weight concentration of the pulp is 12%, add Na 2 CO 3 8Kg / t- 原矿 , pulp pH 10.1; add catechol 600g / t- 原矿 , stirring for 3min; adding phosphatized starch 120g / t- 原矿 , stirred for 3 minutes; settled still, and used the siphon method to extract the -10um part for the first desliming; supplemented with water, and then added Na 2 CO 3 3Kg / t- 原矿 , pulp pH10.5; add catechol 120g / t- 原矿 , stirring for 3min; adding phosphatized starch 40g / t- 原矿 , stirred for 3 minutes; static settling, and the -10um part was extracted by siphon method for the second desliming; the two deslimed muds were combined and dried for testing.

[0023]

Embodiment 3

[0025] The experiment selects raw bauxite ore. After crushing the bauxite ore, use wet grinding in the ball mill, and grind to -0.074μm to account for 80%; add water, stir evenly on a magnetic stirrer, and the concentration of the pulp solids is 10% by weight, and add Na 2 CO 3 9.9Kg / t- 原矿 , pulp pH11; add catechol 700g / t- 原矿 , stirring for 3min; adding phosphatized starch 72g / t- 原矿 , stirred for 3 minutes; settled still, and used the siphon method to extract the -10μm part for the first desliming; supplemented with water, and then added Na 2 CO 3 3Kg / t- 原矿 , pulp pH10.5; add catechol 120g / - 原矿 , stirring for 3min; adding phosphatized starch 32g / t- 原矿 , stirred for 3 minutes; static settling, and the -10 μm part was extracted by siphon method for the second desliming; the two deslimed muds were combined and dried for testing. The final desliming results are shown in Table 3.

[0026]

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PUM

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Abstract

A reverse floatation method for removing mud from bauxite includes such steps as grinding crude bauxite, regulating concentration and pH value of ore slurry, stirring, adding catechol, stirring, adding phosphonated starch to flocculate the monohydrated duraluminite, layering, and removing suspended mud by siphon method.

Description

technical field [0001] A bauxite reverse flotation desliming method relates to a bauxite reverse flotation process. Background technique [0002] The gangue minerals in bauxite are mainly clay minerals such as kaolinite, illite, pyrophyllite, and chlorite, which crystallize finely and form primary slime with low hardness. Raw slime. The current research shows that the presence of slime in the system greatly deteriorates the separation effect during reverse flotation of bauxite, so the removal of slime has become a top priority. [0003] At present, there are the following desliming processes at home and abroad: 1. Natural desliming. As a result, a large amount of fine-grained diaspore and other useful minerals are also lost. 2. Use inorganic salts as dispersants. The floatability of each constituent mineral has been greatly changed, which is extremely unfavorable for subsequent reverse flotation. 3. Using polyacrylamide and its derivatives or caustic starch as flocculan...

Claims

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Application Information

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IPC IPC(8): B03D1/014B03B1/00B03D3/06B03D101/00B03D103/04
Inventor 张云海吴熙群郑桂兵曾克文任爱军刘水红
Owner XIAOYI TIANZHANG ALUMINUM
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