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Method for recovering rhenium from rhenium concentrate

A concentrate and leaching technology is applied in the field of rhenium recovery in rhenium concentrate, which can solve the problems of low leaching rate, long cycle, and complicated subsequent impurity removal, and achieve the effect of improving recovery rate and effective separation

Active Publication Date: 2017-08-18
YANGGU XIANGGUANG COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the pressurized oxygen leaching equipment has a large investment, high safety requirements, and high production costs; the pressurized alkaline leaching equipment of Fan Xingxiang et al. There is no report; Wu Haiguo’s alkali leaching of rhenium from arsenic filter cake, because the leaching rate of alkali leaching is low, and leaching is staged, the subsequent impurity removal process is complicated, the cycle is long, and the subsequent extraction tail liquid treatment cost is high; the impact of chlorination leaching on the environment Large pollution, high investment in environmental protection, and subsequent purification is not easy; extraction also brings problems in the treatment of the extraction phase; roasting and leaching have high environmental pollution and large investment
There are different shortcomings in the leaching of the above-mentioned rhenium concentrates, so it is urgent to seek a low-consumption and high-efficiency recovery process for rhenium

Method used

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  • Method for recovering rhenium from rhenium concentrate
  • Method for recovering rhenium from rhenium concentrate
  • Method for recovering rhenium from rhenium concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Firstly, the rhenium concentrate is mixed with water according to the solid-to-liquid ratio of 1:4, and the rhenium concentrate is low in copper and high in arsenic. The composition of the rhenium concentrate is shown in Table 1:

[0034] Table 1 Composition and material quantity data table of rhenium concentrate

[0035]

[0036] Add 300kg of quicklime to adjust the pH to 14, then add 2099kg of hydrogen peroxide, the amount of hydrogen peroxide added is 5.71 times the dry weight, and then add 72kg of quicklime to adjust the pH to 14 to obtain the decontamination residue and decontamination solution. The ingredients are shown in Table 2 and Table 3:

[0037] Table 2 Composition and slag amount data table of de-impurity slag

[0038]

[0039] Table 3 Composition data table of impurity removal solution (g / L)

[0040] Re Cu Fe As Mo Se 8.75 0.0040 0.00080 0.032 0.026 0.74

[0041] It can be seen from Table 2 and Table 3 that after ...

Embodiment 2

[0044]Firstly, the rhenium concentrate is mixed with water according to the solid-to-liquid ratio of 1:3, and the rhenium concentrate is low in copper and high in arsenic, and the amount of material is reduced. The composition of the rhenium concentrate is shown in Table 4:

[0045] Table 4 Composition and material quantity data table of rhenium concentrate

[0046]

[0047] Add 223kg of quicklime to adjust the pH to 14, then add 1356kg of hydrogen peroxide, the amount of hydrogen peroxide added is 5.50 times the dry weight, and then add 50kg of quicklime to adjust the pH to 14 to obtain the decontamination residue and decontamination solution. The ingredients are shown in Table 5 and Table 6:

[0048] Table 5 Composition and slag amount data table of de-impurity slag

[0049]

[0050] Table 6 Composition data table (g / L) of the impurity removal solution

[0051] Re Cu Fe As Mo Se 9.44 0.0026 <0.00050

0.0058 0.022 0.093

[0052] It c...

Embodiment 3

[0055] Firstly, the rhenium concentrate is mixed with water according to the solid-to-liquid ratio of 1:5, and the rhenium concentrate is high in copper and low in arsenic. The composition of the rhenium concentrate is shown in Table 7:

[0056] Table 7 Composition and material data table of rhenium concentrate

[0057]

[0058]

[0059] Add 297kg of quicklime to adjust the pH to 14, then add 2130kg of hydrogen peroxide, the amount of hydrogen peroxide added is 5.92 times the dry weight, and then add 70kg of quicklime to adjust the pH to 14 to obtain the decontamination slag and decontamination solution. The ingredients are shown in Table 8 and Table 9:

[0060] Table 8 Composition and slag amount data table of de-impurity slag

[0061]

[0062] Table 9 Composition data sheet (g / L) of the impurity removal solution

[0063] Re Cu Fe As Mo Se 5.82 0.0046 <0.00050

0.0073 0.021 0.48

[0064] It can be seen from Table 8 and Table 9 tha...

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Abstract

The invention provides a method for recovering rhenium from rhenium concentrate. The method for recovering rhenium from rhenium concentrate comprises the following steps that (A) a copper-arsenic inhibitor and an oxidizing agent are added for selective leaching after rhenium concentrate is pulpified, and thus leached pulp is obtained; (B) ammonifying purification is conducted on the leached pulp, so that liquid before adsorption is obtained; and (C) concentrating-crystallization is conducted after the liquid before adsorption is adsorbed, so that ammonium rhenate is obtained. According to the method for recovering rhenium from rhenium concentrate, by adding the copper-arsenic inhibitor and the oxidizing agent in the leaching stage, leaching, oxidization and purification are combined, and selective leaching of arsenic is achieved; and then through subsequent purification, adsorption and concentrating-crystallization, the recovery rate of rhenium is increased.

Description

technical field [0001] The invention relates to the technical field of recovery of rare and precious metals, in particular to a method for recovering rhenium in rhenium concentrate. Background technique [0002] Rhenium is a rare element and was discovered later. In 1872, the Russian Mendeleev predicted according to the periodic law of elements that there is an undiscovered "manganese-like" element with an atomic weight of 190 in nature. In 1925, the German chemist Nodak discovered this element in columbite by spectrometry, and named it rhenium after the name of the Rhine River Rhein; after that, Nodak found that rhenium mainly exists in molybdenite and extracted it from it. rhenium metal. Due to the scarcity of rhenium resources and the high price, there has been little research on it for a long time. After 1950, rhenium began to be used in modern technology, and its production developed day by day. China began to extract rhenium from molybdenum concentrate roasting smo...

Claims

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Application Information

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IPC IPC(8): C22B61/00C22B3/04C22B3/44
CPCC22B3/04C22B3/44C22B61/00Y02P10/20
Inventor 谢祥添余华清
Owner YANGGU XIANGGUANG COPPER
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