CN105463195A - Purification method for gold in gold-nickel alloy - Google Patents
Purification method for gold in gold-nickel alloy Download PDFInfo
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- CN105463195A CN105463195A CN201510878352.1A CN201510878352A CN105463195A CN 105463195 A CN105463195 A CN 105463195A CN 201510878352 A CN201510878352 A CN 201510878352A CN 105463195 A CN105463195 A CN 105463195A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a purification method for gold in gold-nickel alloy and belongs to the field of nonferrous metallurgy. According to the purification method, sponge gold is obtained through aqua regia dissolution, saltpeter removing, zinc replacing, rough gold recycling, rough gold dissolving, saltpeter removing, oxalic acid reduction and washing drying purification. The purification method is easy to operate and implement, the whole process is environment-friendly and controllable, the purity of obtained gold is larger than 99.99%, and the gold recovery rate is larger than 98%.
Description
Technical field
The present invention relates to the method for purification of gold in a kind of golden nickelalloy, belong to Non-ferrous Metallurgy field.
Background technology
Gold nickelalloy is widely used as light, middle load contact material.Meanwhile, the golden nickelalloy trade mark of part can be used as electrovacuum solder, is the ideal product of brazing filler metal airspace engine blade.Along with the widespread use of golden nickelalloy, a large amount of golden nickel waste materials needs to reclaim, therefore propose a kind of feasible, efficiently, easily the method for purification of gold just seems especially important in golden nickelalloy.The golden nickelalloy that present method is purified, the cake of gold purity of acquisition can reach 99.99%, and the rate of recovery of gold is greater than 98%.
Summary of the invention
The object of this invention is to provide a kind of efficiently, the method for purification of gold in golden nickelalloy easily.
According to technical scheme provided by the invention, the method for purification of gold in a kind of golden nickelalloy, step is:
(1) aqua regia dissolution: configuration chloroazotic acid; Golden nickelalloy is inserted in the chloroazotic acid configured, adopt the mass volume ratio of 2.5-5mL chloroazotic acid to dissolve by 1g gold nickelalloy, dissolve completely and obtain solution;
(2) nitre is caught up with: concentrated at 100-115 DEG C by step (1) gained solution, obtain the concentrated solution of 50-100g/L; The hydrochloric acid that mass concentration is greater than 37% is added, until produce without tobacco in beaker in above-mentioned concentrated solution;
(3) zinc displacement: catch up with the solution after nitre to pour clean ceramic cylinder into step (2) gained, and add deionized water, until strength of solution is down to 10-50g/L; Insert bottom ceramic cylinder by the plastics casing that spelter is housed, pulled out by plastics casing every 2-3 hour, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and rinsed well by spelter, washing fluid pours ceramic cylinder into; Repeat the operation of spelter being put into ceramic cylinder displacement, until the solution in ceramic cylinder becomes clear green from muddiness is brown;
(4) thick gold reclaims: filtered by the solution in step (3) gained ceramic cylinder, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the clean beaker of step (3) gained, and slightly golden by a large amount of washed with de-ionized water;
(5) thick golden aqua regia dissolution: the thick gold after being cleaned by step (4) gained dissolves with the chloroazotic acid configured, and dissolves in 2.5-5mL chloroazotic acid during dissolving by the thick gold of 1g;
(6) nitre is caught up with: concentrated at 100-115 DEG C by step (5) described solution, obtain the concentrated solution of 50-70g/L; The hydrochloric acid that mass concentration is greater than 37% is added, until produce without tobacco in beaker in above-mentioned concentrated solution;
(7) oxalic acid reduction: add enough oxalic acid by step (6) described concentrated solution, be greater than 100g/L, and be heated to 70-95 DEG C to concentration of oxalic acid, until solution achromaticity and clarification, filters and obtains cake of gold;
(8) washing is dried: by a large amount of deionized water rinsing of step (7) gained cake of gold, 200-500 DEG C of oven dry, obtain finished product cake of gold.
In described golden nickelalloy, nickel content is 0.01-18%.
Beneficial effect of the present invention: method of purification of the present invention is easy to operation, whole process environmental protection is controlled, and obtain the purity of gold more than 99.99%, gold recovery is greater than 98%.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Embodiment 1
(1) select materials: choose golden nickel 17.5 waste material 500g.
(2) aqua regia dissolution: inserted by golden nickelalloy in the chloroazotic acid configured, adopt the mass volume ratio of 2.5mL chloroazotic acid to dissolve, and dissolving obtains solution completely by 1g gold nickelalloy.
(3) nitre is caught up with: concentrated by step (2) described solution, obtain concentrated solution.Heating temperature is 100 DEG C, is concentrated to 70g/L.Above-mentioned concentrated solution is added the hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(4) zinc displacement: pour clean ceramic cylinder into by catching up with the solution after nitre, and add appropriate deionized water, strength of solution is made to drop to 40g/L, the plastics casing that spelter is housed is inserted bottom ceramic cylinder, every 2 hours, plastics casing is pulled out, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and zinc is rinsed well soon, washing fluid pours ceramic cylinder into.Repeat aforesaid operations, until the solution in ceramic cylinder becomes clear green from muddiness is brown.
(5) thick gold reclaims: filtered by described for step (4) ceramic cylinder solution, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the described clean beaker of step (4).And it is slightly golden by a large amount of washed with de-ionized water.
(6) thick golden aqua regia dissolution: described for step (5) the thick gold chloroazotic acid configured is dissolved, dissolves in 2.5mL chloroazotic acid by the thick gold of 1g during dissolving.
(7) nitre is caught up with: concentrated by step (6) described solution, obtain concentrated solution.Heating temperature is 100 DEG C, is concentrated to 50g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(8) oxalic acid reduction: add enough oxalic acid by step (7) described concentrated solution, be greater than 100g/L to concentration of oxalic acid, and heat; Heating temperature is 70 DEG C, the clarification until solution becomes colorless, and filtration obtains cake of gold.
(9) washing is dried: a large amount of deionized water rinsing of cake of gold step (8) obtained, and dries, and obtains finished product cake of gold.
(10) detect: spectroscopic analysis is done to step (9) described cake of gold, find that the purity of gold is 99.99%.
Embodiment 2
(1) select materials: choose golden nickel 17.5 waste material 500g.
(2) aqua regia dissolution: inserted by golden nickelalloy in the chloroazotic acid configured, adopts the mass volume ratio of 5mL chloroazotic acid to dissolve by 1g gold nickelalloy, obtains solution.
(3) nitre is caught up with: concentrated by step (2) described solution, obtain concentrated solution.Heating temperature is 105 DEG C, is concentrated to 50g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(4) zinc displacement: pour clean ceramic cylinder into by catching up with the solution after nitre, and add appropriate deionized water, strength of solution is made to drop to 10g/L, the plastics casing that spelter is housed is inserted bottom ceramic cylinder, every 2 hours, plastics casing is pulled out, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and zinc is rinsed well soon, washing fluid pours ceramic cylinder into.Repeating step (4) described operation, until the solution in ceramic cylinder becomes clear green from muddiness is brown.
(5) thick gold reclaims: filtered by described for step (4) ceramic cylinder solution, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the described clean beaker of step (4), and slightly golden by a large amount of washed with de-ionized water.
(6) thick golden aqua regia dissolution: described for step (5) the thick gold chloroazotic acid configured is dissolved, dissolves in 5mL chloroazotic acid by the thick gold of 1g during dissolving.
(7) nitre is caught up with: concentrated by step (6) described solution, obtain concentrated solution.Heating temperature is 105 DEG C, is concentrated to 50g/L.Above-mentioned concentrated solution is added concentrated hydrochloric acid, until produce without tobacco in beaker.
(8) oxalic acid reduction: add enough oxalic acid by step (7) described concentrated solution, and heat, be greater than 100g/L to concentration of oxalic acid, Heating temperature is 70 DEG C, the clarification until solution becomes colorless, and filtration obtains cake of gold.
(9) washing is dried: a large amount of deionized water rinsing of cake of gold step (8) obtained, and dries, and obtains finished product cake of gold.
(10) detect: spectroscopic analysis is done to step (9) described cake of gold, find that the purity of gold is 99.99%.
Embodiment 3
(1) select materials: choose golden nickel 5 waste material 500g.
(2) aqua regia dissolution: inserted by golden nickelalloy in the chloroazotic acid configured, adopts the mass volume ratio of 3mL chloroazotic acid to dissolve by 1g gold nickelalloy, obtains solution.
(3) nitre is caught up with: concentrated by step (2) described solution, obtain concentrated solution.Heating temperature is 110 DEG C, is concentrated to 70g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(4) zinc displacement: pour clean ceramic cylinder into by catching up with the solution after nitre, and add appropriate deionized water, strength of solution is made to drop to 30g/L, the plastics casing that spelter is housed is inserted bottom ceramic cylinder, every 2 hours, plastics casing is pulled out, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and zinc is rinsed well soon, washing fluid pours ceramic cylinder into.Repeating step (4) described operation, until the solution in ceramic cylinder becomes clear green from muddiness is brown.
(5) thick gold reclaims: filtered by described for step (4) ceramic cylinder solution, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the described clean beaker of step (4), and slightly golden by a large amount of washed with de-ionized water.
(6) thick golden aqua regia dissolution: described for step (5) the thick gold chloroazotic acid configured is dissolved, dissolves in 3mL chloroazotic acid by the thick gold of 1g during dissolving.
(7) nitre is caught up with: concentrated by step (6) described solution, obtain concentrated solution; Heating temperature is 100 DEG C, is concentrated to 60g/L.Above-mentioned concentrated solution is added concentrated hydrochloric acid, until produce without tobacco in beaker.
(8) oxalic acid reduction: add enough oxalic acid by step (7) described concentrated solution, be greater than 100g/L to concentration of oxalic acid, and heat; Heating temperature is 70 DEG C, the clarification until solution becomes colorless, and filtration obtains cake of gold.
(9) washing is dried: a large amount of deionized water rinsing of cake of gold step (8) obtained, and dries, and obtains finished product cake of gold.
(10) detect: spectroscopic analysis is done to step (9) described cake of gold, find that the purity of gold is 99.99%.
Embodiment 4
(1) select materials: choose golden nickel 5 waste material 500g.
(2) aqua regia dissolution: inserted by golden nickelalloy in the chloroazotic acid configured, adopts the mass volume ratio of 3.5mL chloroazotic acid to dissolve by 1g gold nickelalloy, obtains solution.
(3) nitre is caught up with: concentrated by step (2) described solution, obtain concentrated solution.Heating temperature is 115 DEG C, is concentrated to 60g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(4) zinc displacement: pour clean ceramic cylinder into by catching up with the solution after nitre, and add appropriate deionized water, strength of solution is made to drop to 20g/L, the plastics casing that spelter is housed is inserted bottom ceramic cylinder, every 3 hours, plastics casing is pulled out, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and zinc is rinsed well soon, washing fluid pours ceramic cylinder into.Repeating step (4) described operation, until the solution in ceramic cylinder becomes clear green from muddiness is brown.
(5) thick gold reclaims: filtered by described for step (4) ceramic cylinder solution, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the described clean beaker of step (4).And it is slightly golden by a large amount of washed with de-ionized water.
(6) thick golden aqua regia dissolution: described for step (5) the thick gold chloroazotic acid configured is dissolved, dissolves in 3.5mL chloroazotic acid by the thick gold of 1g during dissolving.
(7) nitre is caught up with: concentrated by step (6) described solution, obtain concentrated solution.Heating temperature is 100 DEG C, is concentrated to 60g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(8) oxalic acid reduction: add enough oxalic acid by step (7) described concentrated solution, be greater than 100g/L to concentration of oxalic acid, and heat; Heating temperature is 70 DEG C, the clarification until solution becomes colorless, and filtration obtains cake of gold.
(9) washing is dried: a large amount of deionized water rinsing of cake of gold step (8) obtained, and dries, and obtains finished product cake of gold.
(10) detect: spectroscopic analysis is done to step (9) described cake of gold, find that the purity of gold is 99.99%.
Embodiment 5
(1) select materials: choose golden nickel 10 waste material 500g.
(2) aqua regia dissolution: inserted by golden nickelalloy in the chloroazotic acid configured, adopts the mass volume ratio of 4mL chloroazotic acid to dissolve by 1g gold nickelalloy, obtains solution.
(3) nitre is caught up with: concentrated by step (2) described solution, obtain concentrated solution.Heating temperature is 105 DEG C, is concentrated to 80g/L; Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(4) zinc displacement: pour clean ceramic cylinder into by catching up with the solution after nitre, and add appropriate deionized water, strength of solution is made to drop to 30g/L, the plastics casing that spelter is housed is inserted bottom ceramic cylinder, every 3 hours, plastics casing is pulled out, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and zinc is rinsed well soon, washing fluid pours ceramic cylinder into.Repeating step (4) described operation, until the solution in ceramic cylinder becomes clear green from muddiness is brown.
(5) thick gold reclaims: filtered by described for step (4) ceramic cylinder solution, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the described clean beaker of step (4).And it is slightly golden by a large amount of washed with de-ionized water.
(6) thick golden aqua regia dissolution: described for step (5) the thick gold chloroazotic acid configured is dissolved, dissolves in 4mL chloroazotic acid by the thick gold of 1g during dissolving.
(7) nitre is caught up with: concentrated by step (6) described solution, obtain concentrated solution.Heating temperature is 105 DEG C, is concentrated to 60g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(8) oxalic acid reduction: add enough oxalic acid by step (7) described concentrated solution, be greater than 100g/L to concentration of oxalic acid, and heat; Heating temperature is 70 DEG C, the clarification until solution becomes colorless, and filtration obtains cake of gold.
(9) washing is dried: a large amount of deionized water rinsing of cake of gold step (8) obtained, and dries, and obtains finished product cake of gold.
(10) detect: spectroscopic analysis is done to step (9) described cake of gold, find that the purity of gold is 99.99%.
Embodiment 6
(1) select materials: choose golden nickel 10 waste material 500g.
(2) aqua regia dissolution: inserted by golden nickelalloy in the chloroazotic acid configured, adopt the mass volume ratio of 4.5mL chloroazotic acid to dissolve, and dissolving obtains solution completely by 1g gold nickelalloy.
(3) nitre is caught up with: concentrated by step (2) described solution, obtain concentrated solution; Heating temperature is 105 DEG C, is concentrated to 60g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(4) zinc displacement: pour clean ceramic cylinder into by catching up with the solution after nitre, and add appropriate deionized water, strength of solution is made to drop to 30g/L, the plastics casing that spelter is housed is inserted bottom ceramic cylinder, every 3 hours, plastics casing is pulled out, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and zinc is rinsed well soon, washing fluid pours ceramic cylinder into.Repeating step (4) described operation, until the solution in ceramic cylinder becomes clear green from muddiness is brown.
(5) thick gold reclaims: filtered by described for step (4) ceramic cylinder solution, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the described clean beaker of step (4).And it is slightly golden by a large amount of washed with de-ionized water.
(6) thick golden aqua regia dissolution: described for step (5) the thick gold chloroazotic acid configured is dissolved, dissolves in 4.5mL chloroazotic acid by the thick gold of 1g during dissolving.
(7) nitre is caught up with: concentrated by step (6) described solution, obtain concentrated solution.Heating temperature is 100 DEG C, is concentrated to 70g/L.Above-mentioned concentrated solution is added concentrated hydrochloric acid, until produce without tobacco in beaker.
(8) oxalic acid reduction: add enough oxalic acid by step (7) described concentrated solution, be greater than 100g/L to concentration of oxalic acid, and heat.Heating temperature is 70 DEG C, the clarification until solution becomes colorless, and filtration obtains cake of gold.
(9) washing is dried: a large amount of deionized water rinsing of cake of gold step (8) obtained, and dries, and obtains finished product cake of gold.
(10) detect: spectroscopic analysis is done to step (9) described cake of gold, find that the purity of gold is 99.99%.
Embodiment 7
(1) select materials: choose golden nickel 17.5 waste material 500g.
(2) aqua regia dissolution: inserted by golden nickelalloy in the chloroazotic acid configured, adopt the mass volume ratio of 5mL chloroazotic acid to dissolve, and dissolving obtains solution completely by 1g gold nickelalloy.
(3) nitre is caught up with: concentrated by step (2) described solution, obtain concentrated solution.Heating temperature is 105 DEG C, is concentrated to 80g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(4) zinc displacement: pour clean ceramic cylinder into by catching up with the solution after nitre, and add appropriate deionized water, strength of solution is made to drop to 40g/L, the plastics casing that spelter is housed is inserted bottom ceramic cylinder, every 3 hours, plastics casing is pulled out, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and zinc is rinsed well soon, washing fluid pours ceramic cylinder into.Repeating step (4) described operation, until the solution in ceramic cylinder becomes clear green from muddiness is brown.
(5) thick gold reclaims: filtered by described for step (4) ceramic cylinder solution, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the described clean beaker of step (4).And it is slightly golden by a large amount of washed with de-ionized water.
(6) thick golden aqua regia dissolution: described for step (5) the thick gold chloroazotic acid configured is dissolved, dissolves in 5mL chloroazotic acid by the thick gold of 1g during dissolving.
(7) nitre is caught up with: concentrated by step (6) described solution, obtain concentrated solution.Heating temperature is 100 DEG C, is concentrated to 70g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(8) oxalic acid reduction: add enough oxalic acid by step (7) described concentrated solution, be greater than 100g/L to concentration of oxalic acid, and heat.Heating temperature is 70 DEG C, the clarification until solution becomes colorless, and filtration obtains cake of gold.
(9) washing is dried: a large amount of deionized water rinsing of cake of gold step (8) obtained, and dries, and obtains finished product cake of gold.
(10) detect: spectroscopic analysis is done to step (9) described cake of gold, find that the purity of gold is 99.99%.
Embodiment 8
(1) select materials: choose golden nickel 17.5 waste material 500g.
(2) aqua regia dissolution: golden nickelalloy is inserted in the chloroazotic acid configured, and dissolving obtains solution completely, adopts the mass volume ratio of 4.5mL chloroazotic acid to dissolve by 1g gold nickelalloy.
(3) nitre is caught up with: concentrated by step (2) described solution, obtain concentrated solution.Heating temperature is 105 DEG C, is concentrated to 60g/L.Above-mentioned concentrated solution is added concentrated hydrochloric acid, until produce without tobacco in beaker.
(4) zinc displacement: pour clean ceramic cylinder into by catching up with the solution after nitre, and add appropriate deionized water, strength of solution is made to drop to 50g/L, the plastics casing that spelter is housed is inserted bottom ceramic cylinder, every 2 hours, plastics casing is pulled out, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and zinc is rinsed well soon, washing fluid pours ceramic cylinder into.Repeating step (4) described operation, until the solution in ceramic cylinder becomes clear green from muddiness is brown.
(5) thick gold reclaims: filtered by described for step (4) ceramic cylinder solution, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the described clean beaker of step (4).And it is slightly golden by a large amount of washed with de-ionized water.
(6) thick golden aqua regia dissolution: described for step (5) the thick gold chloroazotic acid configured is dissolved, dissolves in 4.5mL chloroazotic acid by the thick gold of 1g during dissolving.
(7) nitre is caught up with: concentrated by step (6) described solution, obtain concentrated solution.Heating temperature is 100 DEG C, is concentrated to 70g/L.Above-mentioned concentrated solution is added the concentrated hydrochloric acid that mass concentration is greater than 37%, until produce without tobacco in beaker.
(8) oxalic acid reduction: add enough oxalic acid by step (7) described concentrated solution, be greater than 100g/L to concentration of oxalic acid, and heat.Heating temperature is 70 DEG C, the clarification until solution becomes colorless, and filtration obtains cake of gold.
(9) washing is dried: a large amount of deionized water rinsing of cake of gold step (8) obtained, and dries, and obtains finished product cake of gold.
(10) detect: spectroscopic analysis is done to step (9) described cake of gold, find that the purity of gold is 99.99%.
Claims (2)
1. a method of purification golden in golden nickelalloy, is characterized in that step is:
(1) aqua regia dissolution: configuration chloroazotic acid; Golden nickelalloy is inserted in the chloroazotic acid configured, adopt the mass volume ratio of 2.5-5mL chloroazotic acid to dissolve by 1g gold nickelalloy, dissolve completely and obtain solution;
(2) nitre is caught up with: concentrated at 100-115 DEG C by step (1) gained solution, obtain the concentrated solution of 50-100g/L; The hydrochloric acid that mass concentration is greater than 37% is added, until produce without tobacco in beaker in above-mentioned concentrated solution;
(3) zinc displacement: catch up with the solution after nitre to pour clean ceramic cylinder into step (2) gained, and add deionized water, until strength of solution is down to 10-50g/L; Insert bottom ceramic cylinder by the plastics casing that spelter is housed, pulled out by plastics casing every 2-3 hour, and the thick gold be attached on plastics casing and spelter is scraped into clean beaker, and rinsed well by spelter, washing fluid pours ceramic cylinder into; Repeat the operation of spelter being put into ceramic cylinder displacement, until the solution in ceramic cylinder becomes clear green from muddiness is brown;
(4) thick gold reclaims: filtered by the solution in step (3) gained ceramic cylinder, obtains the thick gold of part, is then mixed by the thick gold in this part thick gold and the clean beaker of step (3) gained, and slightly golden by washed with de-ionized water;
(5) thick golden aqua regia dissolution: the thick gold after being cleaned by step (4) gained dissolves with the chloroazotic acid configured, and dissolves in 2.5-5mL chloroazotic acid during dissolving by the thick gold of 1g;
(6) nitre is caught up with: concentrated at 100-115 DEG C by step (5) described solution, obtain the concentrated solution of 50-70g/L; The hydrochloric acid that mass concentration is greater than 37% is added, until produce without tobacco in beaker in above-mentioned concentrated solution;
(7) oxalic acid reduction: add enough oxalic acid by step (6) described concentrated solution, be greater than 100g/L, and be heated to 70-95 DEG C to concentration of oxalic acid, until solution achromaticity and clarification, filters and obtains cake of gold;
(8) washing is dried: by a large amount of deionized water rinsing of step (7) gained cake of gold, 200-500 DEG C of oven dry, obtain finished product cake of gold.
2. the method for purification of gold in golden nickelalloy as claimed in claim 1, is characterized in that: in described golden nickelalloy, nickel content is 0.01%-18%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110172585A (en) * | 2019-04-29 | 2019-08-27 | 北京理工大学 | A method of extracting golden simple substance from gold-containing scrap |
| CN114045403A (en) * | 2021-11-16 | 2022-02-15 | 彭仕华 | But natural gold sand purification is with refining equipment that cascade dissolves replacement and purification |
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| CN114045403A (en) * | 2021-11-16 | 2022-02-15 | 彭仕华 | But natural gold sand purification is with refining equipment that cascade dissolves replacement and purification |
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