Method for synchronously separating and extracting scattered element tellurium and metal copper from cuprous telluride slag

A cuprous telluride slag and synchronous separation technology is applied in the field of non-ferrous metal metallurgy, which can solve the problems of low tellurium recovery rate, large consumption of reagents, long process flow, etc., and achieves high-efficiency selective leaching, simple equipment and low energy consumption. Effect

Active Publication Date: 2021-09-03
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of incomplete separation of copper and tellurium, low recovery rate of tellurium, long process flow and large consumption of reagents when dealing with cuprous telluride slag for separation and recovery of tellurium and copper in the prior art. A method for synchronously separating and extracting rare element tellurium and metal copper from cuprous telluride slag, which has the characteristics of high separation efficiency of copper and tellurium, simple process, and low reagent consumption, etc., and can realize efficient synthesis of tellurium and copper in cuprous telluride slag Recycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for synchronously separating and extracting scattered element tellurium and metal copper from cuprous telluride slag in this embodiment comprises the following steps:

[0030] S1. Weigh an appropriate amount of NaOH solid or KOH solid into water to prepare 1 L of alkali solution with a concentration of 4 mol / L.

[0031] S2. The cuprous telluride slag powder is pre-ball-milled to be less than 300 μm, and dried at 110° C. for 24 hours. Take 200g of fully dried and ground cuprous telluride slag powder and add it to the alkali solution prepared in step S1, and continue stirring at room temperature for 2 hours for pre-soaking at a stirring speed of 250rpm to obtain a mixed slurry.

[0032] S3, under the condition of mechanical stirring, slowly drop by H in the mixed slurry of step S2 2 o 2 Chlorine-containing composite oxidant formulated with NaClO, where NaClO occupies H 2 o 2 The ratio is 5%; the H used in this embodiment 2 o 2 Both are the most common conce...

Embodiment 2

[0037] A method for synchronously separating and extracting scattered element tellurium and metal copper from cuprous telluride slag in this embodiment is basically the same as in embodiment 1, except that,

[0038] Weigh an appropriate amount of NaOH solid or KOH solid into water in S1 to prepare 1 L of alkali solution with a concentration of 2 mol / L.

[0039] In S2, the cuprous telluride slag powder was ball-milled and dried at 130°C for 48 hours, and 200 g of the cuprous telluride slag powder was added to the alkali solution, and kept stirring at room temperature for 1.5 hours for pre-soaking at a stirring speed of 300 rpm to obtain a mixture pulp.

[0040] In S3, under the condition of mechanical stirring, slowly dropwise add an appropriate amount of NaClO and 500 mL of 30% H 2 o 2 A chlorine-containing composite oxidant configured, in which NaClO accounts for H 2 o 2 The ratio is 10%; the addition rate is 45ml / min; after the oxidant is added, the stirring reaction is ...

Embodiment 3

[0045] A method for synchronously separating and extracting scattered element tellurium and metal copper from cuprous telluride slag in this embodiment is basically the same as in embodiment 1, except that,

[0046] Weigh NaOH solid or KOH solid into water in S1 to prepare 1 L of alkali solution with a concentration of 6 mol / L.

[0047] In S2, the cuprous telluride slag powder was ball-milled and dried at 125°C for 72 hours, 200g of cuprous telluride slag powder was added to the alkali solution, and stirred at room temperature for 1.0h for pre-soaking at a stirring speed of 350rpm to obtain a mixture pulp.

[0048] Slowly add NaClO dropwise to the mixed slurry in S3 3 and 500 mL of 30% H 2 o 2 Prepared chlorine-containing composite oxidizer, in which NaClO 3 account for H 2 o 2 The proportion of the oxidant is 10%, and the drop rate is 50ml / min; after the oxidant is added, the stirring reaction is continued for 5h, the stirring speed is 350rpm, and the reaction temperatu...

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Abstract

The invention discloses a method for synchronously separating and extracting a scattered element tellurium and metal copper from cuprous telluride slag, and belongs to the field of nonferrous metallurgy. According to the method, a chlorine-containing composite oxidizing agent is added into an alkaline system to conduct selective oxidation leaching on tellurium in the cuprous telluride slag, the main components of the leaching slag are copper oxide and cuprous oxide, and the leaching slag can be returned to a copper smelting system to recycle metal copper; and the pH value of the tellurium-containing leachate is adjusted by using inorganic acid to precipitate and recover tellurium in the form of TeO2, thereby realizing synchronous separation and extraction of tellurium and copper. The chlorine-containing composite oxidizing agent is adopted for alkaline leaching of the cuprous telluride slag to separate and recover tellurium and copper, the method has the advantages of being high in tellurium and copper recovery rate, simple in process, low in cost and the like, and short-process efficient comprehensive recovery of the cuprous telluride slag can be achieved.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal metallurgy, and more specifically relates to a method for synchronously separating and extracting scattered element tellurium and metallic copper from cuprous telluride slag. Background technique [0002] Tellurium is a rare element, because it has both metal and non-metal properties, it is collectively called "metalloid" together with boron, arsenic and other elements. Due to its excellent physical and chemical properties, tellurium is widely used in thin film solar energy, thermoelectric materials, metallurgy, electronic appliances, petrochemicals, glass ceramics and other industries. Emerging industries are currently the most important application areas for tellurium, with thermoelectric and photovoltaic applications accounting for more than two-thirds of the total tellurium consumption. With the continuous progress of society and technology, global tellurium consumption will continu...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B1/00C22B15/00C01B19/04
CPCC22B7/04C22B7/008C22B1/005C22B15/001C01B19/004Y02P10/20
Inventor 赵卓徐亮张福元张楷何锦东王玲姚东徐梦婷习亚璇
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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