CN106337128A

CN106337128A - Copper orthosilicate leaching method

Info

Publication number: CN106337128A
Application number: CN201610646221.5A
Authority: CN
Inventors: 秦丹; 匡茜熹; 龙炳清
Original assignee: Sichuan Normal University
Current assignee: Sichuan Normal University
Priority date: 2016-08-09
Filing date: 2016-08-09
Publication date: 2017-01-18

Abstract

A copper orthosilicate leaching method disclosed by the invention comprises the steps of blending a copper orthosilicate powder, concentrated hydrochloric acid and anhydrous copper chloride together, then carrying out standing reaction, adding water to the material after the standing reaction and then leaching.

Description

The leaching method of copper orthosilicate

Technical field

The present invention relates to a kind of leaching method of copper orthosilicate.

Background technology

Copper orthosilicate is the important source material producing the materials such as metallic copper, mantoquita.Wet processing is the master producing above-mentioned material Want technique, leaching operation in this technique is requisite operation.In production metallic copper, the wet processing of mantoquita, substantially Using Ore Leaching system.Due to the cusio in copper orthosilicate₃Silicic acid (h can be generated with acid reaction in leaching process₂sio₃) glue Body material, causes the material solid-liquid separation after leaching very difficult, in extreme circumstances, or even cannot get leachate.Exploitation leaching Go out rate height, the leaching method of the easy copper orthosilicate of solid-liquid separation has larger practical value.

Content of the invention

The problem leaching for current copper orthosilicate, the purpose of the present invention is to find a kind of leaching rate height, solid-liquid separation appearance The leaching method of easy copper orthosilicate is it is characterised in that by the cupric silicate breeze of≤180 mesh, anhydrous cupric chloride and concentrated hydrochloric acid in the lump Mix and stir, the addition of hydrochloric acid is the 105%～120% of theoretical consumption.In terms of the copper in copper orthosilicate, per kilogram in copper orthosilicate Copper adds anhydrous cupric chloride 2.1kg～2.8kg.The material standing and reacting time after mixing and stirring is not less than 3h.Thing after standing and reacting Material and water add leaching reactor stirring reaction 1h～3h, mixing speed 30r/min～120r/min in the lump.Water is pressed in leachate Copper concentration is that 50g/l～150g/l metering adds.Extraction temperature is 40 DEG C～60 DEG C.Carry out solid-liquid separation after the completion of leaching, obtain To required leachate.The slag that solid-liquid separation obtains is washed with clear water, and washings return leaching process.

The object of the present invention is achieved like this: concentrated hydrochloric acid is as follows with the main chemical reactions of copper orthosilicate:

cusio₃+ 2hcl = cucl₂+ h₂sio₃

cucl₂+ h₂sio₃+ mh₂o = cucl₂(m+1)h₂o + sio₂

Overall reaction is:

cusio₃+ 2hcl + mh₂o = cucl₂(m+1)h₂o + sio₂

M≤3 in formula.

In leaching process, only there is cucl₂(m+1)h₂The dissolving reaction of o.

By above-mentioned series reaction it is achieved that effective leaching of copper orthosilicate.

The outstanding advantages of the present invention are: through above-mentioned series reaction, in particular with copper chloride water of crystallization to silica gel Carry out forced dehydration and generate sio₂, so that the cu in copper orthosilicate is substantially completely leached, turn avoid the life of siliceous colloid Become, make the solid-liquid separation of leaching material very easy.

Specific implementation method

Embodiment 1: by 1000g cupric silicate breeze (cupric 28.1%, particle diameter≤180 mesh) and 36% concentrated hydrochloric acid 986g, 787g no Water copper chloride mixes and stirs in the lump, mixes and stirs rear standing and reacting 3h, and the material after standing and reacting adds the enamel reaction still that volume is 20l In, add 13.1l water, be stirred reacting (mixing speed 70r/min) 1h, extraction temperature is 60 DEG C.According to the leaching after cleaning The assay result slagged tap, the leaching rate of copper is 99.2%.

Embodiment 2: by 100kg cupric silicate breeze (cupric 45.2%, particle diameter≤180 mesh) and 36% concentrated hydrochloric acid 151kg, 95kg anhydrous cupric chloride mixes and stirs in the lump, mixes and stirs rear standing and reacting 4h, and it is 1m that the material after standing and reacting adds volume³Fiberglass In reactor, add 600l water, be stirred reacting (mixing speed 50r/min) 3h, extraction temperature is 40 DEG C.After cleaning Leached mud assay result, the leaching rate of copper is 99.1%.

Claims

1. a kind of leaching method of copper orthosilicate is it is characterised in that by the cupric silicate breeze of≤180 mesh, anhydrous cupric chloride and dense salt Acid is mixed and stirred in the lump, and the addition of hydrochloric acid is the 105%～120% of theoretical consumption, in terms of the copper in copper orthosilicate, in copper orthosilicate Per kilogram copper adds anhydrous cupric chloride 2.1kg～2.8kg, and the material standing and reacting time after mixing and stirring is not less than 3h, standing and reacting Material afterwards and water add leaching reactor stirring reaction 1h～3h, mixing speed 30r/min～120r/min in the lump, and water presses leaching Going out copper concentration in liquid is that 50g/l～150g/l metering adds, and extraction temperature is 40 DEG C～60 DEG C, carries out solid-liquid and divide after the completion of leaching From, obtain required leachate, the slag that solid-liquid separation obtains is washed with clear water, washings return leaching process.