Method for recovering rhenium from high-sulfur high-arsenic unwieldiness lean rhenium slag

A difficult-to-treat, high-sulfur technology, applied in the direction of improving process efficiency, can solve the problems of difficult filtration of leachate, low rhenium leaching rate, and difficult treatment of produced copper and arsenic slag, so as to improve the level of comprehensive utilization and the recovery rate of rhenium High efficiency and low running cost

Active Publication Date: 2017-10-10
JINCHUAN GROUP LIMITED
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Due to the high content of sulfur and arsenic in the slag, the traditional wet leaching process is used for recovery, which has the prob

Method used

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  • Method for recovering rhenium from high-sulfur high-arsenic unwieldiness lean rhenium slag
  • Method for recovering rhenium from high-sulfur high-arsenic unwieldiness lean rhenium slag
  • Method for recovering rhenium from high-sulfur high-arsenic unwieldiness lean rhenium slag

Examples

Experimental program
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Example Embodiment

[0017] Example 1

[0018] In this embodiment, the high-sulfur and high-arsenic refractory rhenium-poor slag contains 0.18% rhenium, 16.50% arsenic, 2.53% copper, 9.87% bismuth, and 62.85% sulfur based on the mass percentage of the rhenium-poor slag.

[0019] a. Weigh 500 g of the above-mentioned rhenium-poor slag, put it into a muffle furnace, heat it up to 260 ° C, and then feed it into air for oxidative roasting for 6 hours, and open the tail gas absorption and condensation device simultaneously; In terms of mass percentage, it contains 1.18% rhenium, 0.38% arsenic, 21.60% copper, 41.47% bismuth, and 0.8% sulfur;

[0020] b. Take the rhenium-rich slag in step a and carry out selective leaching under oxygen pressure, the leaching process is two-stage countercurrent leaching, and the leaching conditions are the same, wherein the leaching solvent is hydrogen peroxide, and the solid-liquid mass volume ratio is 3:1, and saturated sodium carbonate is used before leaching The pH v...

Example Embodiment

[0024] Example 2

[0025] In this embodiment, the high-sulfur and high-arsenic refractory rhenium-poor slag contains 0.18% rhenium, 18.49% arsenic, 2.65% copper, 10.60% bismuth, and 63.33% sulfur based on the mass percentage of the rhenium-poor slag.

[0026] a. Weigh 500 g of the above-mentioned rhenium-poor slag, put it into a muffle furnace, and feed air for oxidative roasting at 265 ° C for 6.5 hours, and open the exhaust gas absorption and condensation device at the same time; In percentage terms, it contains 1.19% rhenium, 0.41% arsenic, 23.34% copper, 44.09% bismuth, and 1.02% sulfur;

[0027] b. Take the rhenium-rich slag in step a and carry out selective leaching under oxygen pressure. The leaching process is two-stage countercurrent leaching, and the leaching conditions are the same. The leaching solvent is hydrogen peroxide, and the solid-liquid mass-volume ratio is 4:1. Before leaching, saturated sodium carbonate is used. The pH value of the solution was adjusted ...

Example Embodiment

[0031] Example 3

[0032] In this embodiment, the high-sulfur and high-arsenic refractory rhenium-poor slag contains 0.20% rhenium, 18.04% arsenic, 3.44% copper, 11.21% bismuth, and 63.30% sulfur in terms of the mass percentage of the rhenium-poor slag.

[0033] a. Weigh 500 g of the above-mentioned rhenium-poor slag, put it into a muffle furnace, and pass air for oxidative roasting at 270 ° C for 7.0 h, and open the tail gas absorption and condensation device at the same time; In percentage terms, it contains 1.36% rhenium, 0.59% arsenic, 23.32% copper, 42.02% bismuth, and 0.88% sulfur;

[0034] b. Take the rhenium-rich slag in step a and carry out selective leaching under oxygen pressure, the leaching process is two-stage countercurrent leaching, and the leaching conditions are the same, wherein the leaching solvent is hydrogen peroxide, and the solid-liquid mass volume ratio is 5:1, and saturated sodium carbonate is used before leaching The pH value of the solution was adj...

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Abstract

The invention discloses a method for recovering rhenium from high-sulfur high-arsenic unwieldiness lean rhenium slag, and belongs to the technical field of dissipated metal recovering. According to the method, the high-sulfur high-arsenic unwieldiness lean rhenium slag is subject to oxidizing roasting arsenic expelling and desulfuration, and therefore the rhenium in the high-sulfur high-arsenic unwieldiness lean rhenium slag is preliminarily enriched, and rich-rhenium slag is obtained; and then the rich-rhenium slag is subject to ordinary-pressure selective leaching, leaching slag serves as bismuth dross to be treated, leaching liquid is subject to extraction, separation and purification, and rich-rhenium liquid obtained after purification is subject to evaporation concentration and freezing crystallization to produce an ammonium rhenate product. The method is short in procedure, simple in process, high in rhenium recovering rate and low in running cost; the problems that when a traditional wet method leaching process is adopted for treating high-sulfur high-arsenic lean rhenium slag, the rhenium leaching efficiency is low, produced copper arsenic slag is large in treatment difficulty, and leaching liquid is difficult to filter are solved; valuable metal copper and bismuth are recovered while the rhenium is recovered, and the resource comprehensive utilization level is improved.

Description

technical field [0001] The invention belongs to the technical field of recovery of scattered metals, and relates to a method for recovering rhenium from high-sulfur and high-arsenic refractory rhenium-poor slag. Background technique [0002] Rhenium belongs to scattered metals, and its content in the earth’s crust is smaller than that of all rare earth elements, only greater than that of protactinium and radium. It cannot form fixed minerals in nature, and is often associated with molybdenum, copper, lead, zinc and other minerals, which is difficult recycle and re-use. The rhenium in the copper concentrate enters the flue gas during the pyro-smelting process, and the rhenium is enriched in the eluent after the flue gas is leached. Rhenium is recovered from acidic rinse water, but the process varies. The rhenium in the flue gas eluent of high-arsenic copper concentrate smelting is sulfide-precipitated and enters the precipitated slag to form a slag containing 0.18-0.21% rhe...

Claims

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Application Information

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IPC IPC(8): C22B61/00C22B7/04C22B1/02C22B30/06C22B15/00C22B3/40
CPCC22B1/02C22B7/007C22B7/04C22B15/0067C22B30/06C22B61/00C22B3/402Y02P10/20
Inventor 卢苏君刘玉强李娟李维舟田忠元张鹏张素超魏睿郭锋陆斌刚董政武张妮冯艳
Owner JINCHUAN GROUP LIMITED
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