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Treatment method for purifying and whitening barite

A treatment method and barite technology, which is applied in the field of barite purification and whitening, can solve the problems that Ca cannot be removed and affects the purity, and achieves the effects of low cost, improved purification, and simple process

Pending Publication Date: 2022-04-12
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, using hydrofluoric acid as pickling agent combined with calcination treatment, the whiteness of barite obtained is 88%; using sulfuric acid as pickling agent in combination with complexing agent, the obtained barite whiteness is 84.72% Take sulfuric acid as pickling agent in combination with calcination, although the obtained barite whiteness can reach 93.5% higher, but Ca in the raw ore cannot be removed (generate calcium sulfate precipitation), thus affecting the purity; how to obtain high whiteness and Barite with high purity has become a technical problem

Method used

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  • Treatment method for purifying and whitening barite

Examples

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Embodiment 1

[0033] This embodiment provides a treatment method for purifying and whitening barite, comprising the following steps:

[0034] Take by weighing 25g of barite powder ground into powder, and add the first complexing agent EDTA-2Na in the barite powder and mix evenly, and the mass ratio of EDTA-2Na and barite powder is 0.9%:1, obtain the first a mixture;

[0035] Slowly add the first mineral acid (hydrochloric acid with a concentration of 5mol / L) in the first mixture and mix well to obtain the second mixture, and the mass ratio of the added hydrochloric acid volume to barite powder is 5:4; the second mixture React in a water bath at 60°C for 1 hour, filter the reaction product with suction, and add 60 mL of 2 mol / l hydrochloric acid to the product obtained by suction filtration three times to wash it; then wash off the acid on the surface of the product with deionized water, and then wash it Treat at 150°C for 40 minutes to obtain preliminarily purified and whitened barite powd...

Embodiment 2

[0039] This embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and Embodiment 1 is that in this embodiment, the first inorganic acid is 2mol / L hydrochloric acid.

[0040] The purified and whitened barite obtained in this example was ground into powder, and the whiteness was measured with a whiteness meter. As a result, the whiteness of the purified and whitened barite in this example was 65.2%.

Embodiment 3

[0042] This embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and Embodiment 1 is that in this embodiment, the first inorganic acid is 3 mol / L hydrochloric acid.

[0043] The purified and whitened barite obtained in this example was ground into powder, and the whiteness was measured with a whiteness meter. As a result, the whiteness of the purified and whitened barite in this example was 66.7%.

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Abstract

The invention belongs to the technical field of barite whitening, and discloses a barite purifying and whitening treatment method which comprises the following steps: grinding barite into barite powder, adding a first complexing agent, and uniformly mixing to obtain a mixture; adding a first inorganic acid into the mixture to carry out first acid leaching treatment, deacidifying, washing and drying to obtain primarily purified and whitened barite powder; the primarily purified and whitened barite powder is calcined for 30-150 min at the temperature of 900-1350 DEG C, and an obtained calcined product is purified and whitened barite; wherein the first inorganic acid is hydrochloric acid or nitric acid. The method disclosed by the invention is easy to operate, low in raw material treatment cost and good in purifying and whitening effects, and the whiteness of the barite can be improved from 34% to 95.1%.

Description

technical field [0001] The invention relates to the technical field of barite whitening, in particular to a treatment method for purifying and whitening barite. Background technique [0002] Barite is an advantageous resource in my country, and its output ranks first in the world. my country's barite contains high impurities, which are black and gray ores, and barite with low whiteness cannot meet the application fields of barite, resulting in the low export price of barite in my country, which affects my country's barite industry development and is not conducive to the efficient utilization of barite resources. [0003] The purification and whitening schemes of barite include artificial selection, re-election, magnetic separation and chemical purification and whitening. For the barite containing carbon, iron, manganese, nickel and other impurities, it needs to be purified and whitened by chemical methods. [0004] In the prior art, using hydrofluoric acid as pickling agen...

Claims

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Application Information

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IPC IPC(8): C01F11/46
CPCY02P10/20
Inventor 仇伟李珍黄宏升符远翔
Owner GUIZHOU INST OF TECH
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