CN102732913A

CN102732913A - Process for purifying pure silver and preparation method

Info

Publication number: CN102732913A
Application number: CN2012102520675A
Authority: CN
Inventors: 黄小福
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-20
Filing date: 2012-07-20
Publication date: 2012-10-17

Abstract

The invention provides a process and a preparation method for separating valued metal substances contained in silver to purify pure silter by refining and purifying a dore silver primary raw material according to different expression behaviors of metallic element ions to Hass current in media liquid through different potential properties of metal elements. By adopting the process method provided by the invention, on the aspects of refining and purifying of the dore silver, refined finished electrolytic silver powder reaches a high quality of 99.99%, a small quantity of silver-containing waste materials are generated in the refining and purifying production, silver-containing waste water can be returned to the refining production link through a recovery method, and other metals are discharged to a waste liquid treatment system and can also be all recovered.

Description

A kind of technology and preparation method of purification thousand pure silvers

One. technical field

The present invention relates to a kind of method of the silver of purifying, the technology and the preparation method of thousand pure silvers that are specially adapted to purify.

Two. background technology

It is that use is the widest at present that bubble is separated refining, and electrolytic refining process comprises electrorefining of silver and two steps of golden electrorefining.Silver ore is not that single silver ore has a variety of at the silver ore of occurring in nature discovery; Common have electrum, petzite, krennerite, leaf petzite or the like; Again because the former atomic radius in radius and golden copper-lead and platinum family element etc. of silver is close; So normal and these elements form mutualization thing; Because atomic radius identical (1.44A) lattice parameter close (golden 4.07A, the silver-colored 4.78A) chemical property of Jin Yuyin is similar, contains elements such as a spot of copper, iron, platinum, tellurium, selenium, lead, mercury in addition.

Usually in the mine or the smeltery; Producing silver nearly all is disposable completion smelting or refinery practice flow process; When smelting or refining silver, be not the attention that gold is arranged, silver is also different with the economic worth of gold; Because the quality of this point silver does not obtain the attention of country and relevant department, variable color (blackening reddens) can appear in great majority after market survey silver ornaments use.

Three. summary of the invention

The object of the present invention is to provide a kind of different potentials attribute through metallic element; In media liquid, the differing appearance behavior of Haas electric current is carried out that thick silver-colored primary raw materials is carried out refining through the metallic element ion and purify, the technology and the preparation method of a kind of purification thousand pure silvers of the valuable metal material that is contained in the separation of Silver.

In order to achieve the above object, concrete process method of the present invention is following;

At first, confirm to contain in the raw material distribution situation of metallic element, in electrolyzer, prepare mother liquor, add quantitative silver during the preparation of mother liquor the detection of taking a sample of former material; To improve the silver ion content in the mother liquor, silver content remains on 50%～70%/L; Add quantitative acid, to improve free acid content in the mother liquor, acidity remains on 5g/L; The good back of allotment ON cycle system lets mother liquor in groove, circulate; Be smelted into the little and uniform spray silver of particle to thick silver, promptly drop into electrorefining in the electrolyzer, when electrorefining, outward current is regulated and control according to the detected result of throwing material; Be voltage control electric current or electric current control voltage; Adjustment gets into the galvanic current in the groove; Along with the lengthening of life cycle, other valuable metal elements in the mother liquor also increase, and when exceeding standard if any single metallic element, just need carry out purifying treatment to mother liquor; Stirring in the mother liquor suction refining plant, add the reaction of KOH medicament, other metals of the major part in its mother liquor generate silver suboxide postprecipitations, and supernatant liquid can be put back to and add quantitative acid in the electrolyzer and just can normally use; The finished product electrolytic silver silver powder that refining parses collects, and puts into whizzer and cleans, and the situation according to silver powder during cleaning adds diluted acid; Add boiling water and clean the back drying, obtain 99.999% finished product electrolytic silver powder.

The silver suboxide that in electrorefining production, purify to produce adds to contain and is made into silver soil after the reaction of CL ionic medicament generates AgCL, is smelted into spray silver and drops into electrolysis in the electrolyzer; The waste water adding that when cleaning, produces contains the reaction of CL ionic medicament and generates the AgCL deposition, takes out AgCL and is made into silver-colored soil, is smelted into spray silver and drops into electrolysis in the electrolyzer.

Adopt the process method of invention, on the refining of thick silver is purified, purified finished product electrolytic silver powder reach 99.999% high-quality; And institute is a small amount of argentiferous waste material of generation in refining purify to be produced; Silver-containing waste water can return in the refining production link through recovery method; Other metals then are discharged into liquid waste treatment system, also can all reclaim.

Four, description of drawings

Accompanying drawing 1 is the technology of a kind of purification of the present invention thousand pure silvers and preparing method's process method process flow sheet.

Five, embodiment

Below in conjunction with accompanying drawing the present invention is described further: at first thick silver sampling detects, and grasps the amount of other metallic elements in the material; Allotment is used on the mother liquor of electrorefining, holds the content of silver ions in the mother liquor, the acidity of mother liquor during the mother liquor preparation; Handle ionic content etc. in the mother liquor; Drop into electrolysis in the electrolyzer to melted spray silver, during electrolysis according to the electric current way of output of detected result adjustment RF; Electric current control voltage or voltage control electric current are controlled the parsing quality and the speed of silver ions; Mother liquor produces heat and causes the acid volatilization in the mother liquor during because of production, adds the suitable electrorefining demand of content that quantitative acid guarantees free acid in the mother liquor; The increase of mother liquor duration of service, other metallic elements in its mother liquor also increase, if there is single-element to exceed standard; Mother liquor just needs purifying treatment; Add KOH medicament stirring reaction during mother liquor purification, precipitate upper strata, limpid back liquid and return in the electrolyzer, add quantitative acid and just can use; The silver suboxide that is settled out adds the medicament reaction generation AgCL that contains CL after adding the acid dissolving, and AgCL is made into silver soil, is smelted into spray silver and drops into electrorefining in the electrolyzer; Put into whizzer after the finished product electrolytic silver powder produced is collected and clean, with pure water clean to repeatedly do not have a nitrate radical till, dewatered and washed obtains 99.999% finished product electrolytic silver powder; The waste water that produces during cleaning adds and contains CL ionic medicament reaction generation AgCL deposition, and AgCL is made into silver soil, is smelted into electrorefining in the spray silver input electrolyzer.

Above-described embodiment, the present invention embodiment a kind of more preferably just, common variation that those skilled in the art carries out in technical scheme scope of the present invention and replacement all should be included in protection scope of the present invention.

Claims

1. the technology and the preparation method of thousand pure silvers of purifying, it is characterized in that: concrete process method is: at first the detection of taking a sample of former material, confirm to contain in the raw material distribution situation of metallic element; In electrolyzer, prepare mother liquor, add quantitative silver during the preparation of mother liquor, to improve the silver ion content in the mother liquor, silver content remains on 50%～70%/L; Add quantitative acid, to improve free acid content in the mother liquor, acidity remains on 5g/L; The good back of allotment ON cycle system lets mother liquor in groove, circulate; Be smelted into the little and uniform spray silver of particle to thick silver, promptly drop into electrorefining in the electrolyzer, when electrorefining, regulate and control; It is voltage control electric current; Adjustment gets into the galvanic current in the groove; Along with the lengthening of life cycle, other valuable metal elements in the mother liquor also increase, and when exceeding standard if any single metallic element, just need carry out purifying treatment to mother liquor; Stirring in the mother liquor suction refining plant, add the reaction of KOH medicament, other metals in its mother liquor generate silver suboxide postprecipitations, and supernatant liquid can be put back to and add quantitative acid in the electrolyzer and just can normally use; The finished product electrolytic silver silver powder that refining parses collects, and puts into whizzer and cleans, and the situation according to silver powder during cleaning adds diluted acid; Add boiling water and clean the back drying, obtain 99.999% finished product electrolytic silver powder.