CN108940567A - Hydro-thermal vulcanization-warm water flotation separation method of copper in a kind of useless circuit board - Google Patents
Hydro-thermal vulcanization-warm water flotation separation method of copper in a kind of useless circuit board Download PDFInfo
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- CN108940567A CN108940567A CN201810706844.6A CN201810706844A CN108940567A CN 108940567 A CN108940567 A CN 108940567A CN 201810706844 A CN201810706844 A CN 201810706844A CN 108940567 A CN108940567 A CN 108940567A
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- copper
- circuit board
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Abstract
Hydro-thermal vulcanization-warm water flotation separation method of copper in a kind of useless circuit board, the broken classification including useless circuit board, the FLOTATION SEPARATION in breakdown products, the hydro-thermal vulcanizing treatment of metal concentrate, in metal sulphide enrichment body copper four steps of FLOTATION SEPARATION；The broken classification of useless circuit board is that circuit board is crushed to 0.3mm and hereinafter, and is sieved as 4 grades；The FLOTATION SEPARATION of breakdown products is that the breakdown products of 4 grades are carried out FLOTATION SEPARATION nonmetallic enrichment body therein and metal concentrate according to corresponding technique respectively, obtains the metal concentrate that copper content is 70% or more；The hydro-thermal vulcanizing treatment of metal concentrate is that metal concentrate is milled to -0.074mm and the following vulcanization medicament vulcanizing treatment of utilization afterwards；The FLOTATION SEPARATION of copper is that metal sulphide enrichment body is prepared ore pulp according to the floating agent of certain liquid-solid ratio and certain dosage in metal sulphide enrichment body, floatingly selects the copper that purity is greater than 95% by adjusting flotation parameters.
Description
Technical field
The present invention relates to recycling of WEEE fields, and in particular to the floatation separating technology of copper in useless circuit board.
Background technique
Whole world electronic product huge amount superseded every year, almost can not be secondary in addition to subelement in these electronic wastes
It utilizes, if electronic waste arbitrarily abandons, wherein a large amount of poisonous and hazardous metal and nonmetallic substance that contain can be to existence
Environment and human health have very big threat.However using useless circuit board as in the electronic waste of representative again containing it is a large amount of as copper, silver,
Gold, palladium etc. are lived closely bound up metal resource with us, due to these resources face limited reserves in addition with the mankind increasingly
The problem of consumption figure of growth, each state all are reinforcing recycling these valuable sources.
The recovery method of useless circuit board mainly has the techniques such as mechanical approach, pyrogenic process, wet process, biotechnology at present, mechanical
Physical method can efficiently separate metal and nonmetallic, but relatively difficult for the separation between metal；Pyrogenic process mainly passes through
The mode of high-temperature baking separates nonmetallic substance therein；Wet processing mainly is passed through for the separation between metal, it is such as each
Kind acid leaching process, is then recycled using other means.It is extremely important using reasonable recovery process processing useless circuit board.One
A little factories can recycle valuable metal therein by the method for such as direct fire burning, can release during the burning process a large amount of
Noxious material, pollute environment.Some wet recycling process directly recycle noble metal therein in the way of three Ore Leachings,
Plurality of heavy metal can be discharged during this, threaten human health, welding.Therefore, for metal resource in useless circuit board
Greenization removal process is also extremely important.
Floatation utilizes the surface property differences of variable grain, passes through the surface hydrophilic of bubble floating characteristic and variable grain
Property difference sorted, be widely used in fine-grained disseminated grain mineral and material sorting, process efficient, it is adaptable, to environment shadow
Sound is small.Useless circuit board covering or welding conductive metal layer or metal wire usually on nonconducting resin substrate are made, visually
Effectively divide after being broken for subparticle using floatation process for a kind of embedding mineral being distributed in nonmetallic of high-grade metal
From different material, valuable metal is recycled.Floatation is most for metallics and nonmetallic substance for circuit board recycling at present
Separation, the high-recovery of copper, and floatation process can only be generally realized to the flotation recovery of copper in circuit board in specific grade
Follow conventional lines mineral floatation technique, causes flotation effect not ideal enough.The present invention provides it is a kind of it is efficient, environmental-friendly, be suitable for
The flotation separation method of copper in the useless circuit board of industrial application improves broken circuit board by hydro-thermal vulcanizing treatment and warm water flotation
The collecting effect and FLOTATION SEPARATION efficiency of middle copper particle, to realize the efficient, low of the flotation recovery process of copper in useless circuit board
Energy consumption and low environment pollution.
Summary of the invention
The purpose of the present invention is to provide a kind of hydro-thermal vulcanization-warm water flotation separation methods of copper in useless circuit board.
The present invention is a kind of hydro-thermal vulcanization-warm water flotation separation method of copper in useless circuit board, and step is divided into useless circuit
The broken classification of plate, the FLOTATION SEPARATION of breakdown products, the hydro-thermal vulcanizing treatment of metal concentrate, metal sulphide are enriched with copper in body
FLOTATION SEPARATION；The specific steps are that:
(1) the broken classification of useless circuit board: it is 0.3mm and particle below that useless circuit board, which is crushed to partial size, is obtained broken
Useless circuit board particle screening be 4 grades；
(2) the broken particle of useless circuit board the FLOTATION SEPARATION of breakdown products: is utilized respectively dehydrated alcohol according to size fractionated
Decentralized processing is carried out, floating agent is not then added and carries out flotation, metal concentrate 1 and nonmetallic enrichment body 1 are obtained after flotation,
Metal concentrate 1 and nonmetallic enrichment body 1 are subjected to drying and processing, the metal concentrate 1 after drying and processing is subjected to flotation and is obtained
To metal concentrate 2 and nonmetallic enrichment body 2, the nonmetallic enrichment body 1 after drying is subjected to flotation and obtains 3 He of metal concentrate
Metal concentrate 2 and metal concentrate 3 are finally collected together to obtain the gold that copper content is 70% or more by nonmetallic enrichment body 3
Belong to enrichment body, copper recovery is 95% or more；
(3) the hydro-thermal vulcanizing treatment of metal concentrate: it is 0.074mm that the metal concentrate that step (2) obtains, which is milled to partial size,
And particle below, the metal concentrate after ball milling is mixed into ore pulp according to liquid-solid ratio 1ml:1g and water, according to metal enrichment
Weight and vulcanizing agent mass ratio are that 1:0.5-1:0.3 adds vulcanizing agent, vulcanize 2- in the case where temperature is 150 DEG C of -200 DEG C of environment
3 hours；
(4) metal sulphide is enriched with the FLOTATION SEPARATION of copper in body: by the metal concentrate after hydro-thermal vulcanizing treatment according to liquid-solid ratio
500ml:50g and water are mixed into ore pulp, and foaming agent 200g/t, activator 20g/t, collecting agent 200g/t are added in ore pulp, is added
Adding pH regulator adjustment pH values of pulp is 8-10, and the flotation in 40 DEG C -55 DEG C of warm water obtains the copper that purity is greater than 95%；Wherein rise
Infusion is sec-octyl alcohol, and activator is vulcanized sodium, and collecting agent is sodium n-butyl xanthate, and pH regulator is sodium carbonate, at least one in lime
Kind.
The beneficial effects of the present invention are: particle flotation mistake can be effectively ensured in drying and processing in flotation-drying-flotation flowsheet
Cheng Qinshui sex differernce, to obtain better metal-non-metal separating effect；Hydro-thermal vulcanization can make to be high oxidation originally
Rate, high-bonding-ratio copper oxide become the artificial copper sulfide or mixed copper of low oxidation ratio Yu low combination rate, the sulphur of low combination rule
Change Copper Ores wetability is bad, so being easy to be captured by flotation bubble, the particle surface after hydro-thermal vulcanizing treatment has wrapped up sulphur
Change layer not having to add dispersions again in flotation, while flotation agent activity is good under warm water environment, collecting works well.Water
Warm water floatation separation process for copper selectivity is high, high-efficient, low energy consumption, environmental pollution is small for heat cure-.
Detailed description of the invention
Fig. 1 is hydro-thermal vulcanization-warm water flotation separation method flow chart of copper in useless circuit board of the invention.
Specific embodiment
As shown in Figure 1, the present invention is a kind of hydro-thermal vulcanization-warm water flotation separation method of copper in useless circuit board, step
It is divided into the broken classification of useless circuit board, the FLOTATION SEPARATION of breakdown products, the hydro-thermal vulcanizing treatment of metal concentrate, metal sulphide richness
The FLOTATION SEPARATION of copper in collective；The specific steps are that:
(1) the broken classification of useless circuit board: it is 0.3mm and particle below that useless circuit board, which is crushed to partial size, is obtained broken
Useless circuit board particle screening be 4 grades；
(2) the broken particle of useless circuit board the FLOTATION SEPARATION of breakdown products: is utilized respectively dehydrated alcohol according to size fractionated
Decentralized processing is carried out, floating agent is not then added and carries out flotation, metal concentrate 1 and nonmetallic enrichment body 1 are obtained after flotation,
Metal concentrate 1 and nonmetallic enrichment body 1 are subjected to drying and processing, the metal concentrate 1 after drying and processing is subjected to flotation and is obtained
To metal concentrate 2 and nonmetallic enrichment body 2, the nonmetallic enrichment body 1 after drying is subjected to flotation and obtains 3 He of metal concentrate
Metal concentrate 2 and metal concentrate 3 are finally collected together to obtain the gold that copper content is 70% or more by nonmetallic enrichment body 3
Belong to enrichment body, copper recovery is 95% or more；
(3) metal concentrate hydro-thermal vulcanizing treatment: by the metal concentrate that step (2) obtains be milled to partial size be 0.074mm and
Metal concentrate after ball milling is mixed into ore pulp according to liquid-solid ratio 1ml:1g and water, according to metal concentrate by particle below
Quality and vulcanizing agent mass ratio are that 1:0.5-1:0.3 adds vulcanizing agent, vulcanize 2-3 in the case where temperature is 150 DEG C of -200 DEG C of environment
Hour；
(4) metal sulphide is enriched with the FLOTATION SEPARATION of copper in body: by the metal concentrate after hydro-thermal vulcanizing treatment according to liquid-solid ratio
500ml:50g and water are mixed into ore pulp, and foaming agent 200g/t, activator 20g/t, collecting agent 200g/t are added in ore pulp, is added
Adding pH regulator adjustment pH values of pulp is 8-10, and the flotation in 40 DEG C -55 DEG C of warm water obtains the copper that purity is greater than 95%；Wherein rise
Infusion is sec-octyl alcohol, and activator is vulcanized sodium, and collecting agent is sodium n-butyl xanthate, and pH regulator is sodium carbonate, at least one in lime
Kind.
Hydro-thermal vulcanization-warm water flotation separation method of copper in above-described useless circuit board, the useless circuit board are crushed
In classification step, 4 grades are the 1st grade respectively: partial size is 0.074mm and particle below, and the 2nd grade: partial size is
The particle of 0.074mm-0.125mm, the 3rd grade: partial size is the particle of 0.125mm-0.15mm, and the 4th grade: partial size is
The particle of 0.15mm-0.3mm.
Hydro-thermal vulcanization-warm water flotation separation method of copper, the flotation of the breakdown products in above-described useless circuit board
In separating step, the floatation process of the 1st grade are as follows: mixing speed 1600rpm, aeration quantity 70L/h, pulp density 200g/L；2nd
The floatation process of grade are as follows: mixing speed 1900rpm, aeration quantity 90L/h, pulp density 150g/L；The floatation process of 3rd grade
Are as follows: mixing speed 2000rpm, aeration quantity 100L/h, pulp density 120g/L；The floatation process of 4th grade are as follows: mixing speed
2200rpm, aeration quantity 110L/h, pulp density 100g/L.
Hydro-thermal vulcanization-warm water flotation separation method of copper, the water of the metal concentrate in above-described useless circuit board
In heat cure processing step, ball-milling medium is zirconia ball, and vulcanizing agent is at least one of vulcanized sodium, NaHS.
Hydro-thermal vulcanization-warm water flotation separation method of copper in above-described useless circuit board, the metal sulphide are enriched with body
In the FLOTATION SEPARATION step of middle copper, floatation process are as follows: mixing speed 1600rpm-1700rpm, aeration quantity 100L/h, pulp density
100g/L。
Hydro-thermal vulcanization-warm water flotation separation method of copper in above-described useless circuit board, the metal sulphide are enriched with body
In the FLOTATION SEPARATION step of middle copper, need by the copper in 2 FLOTATION SEPARATION metal sulphide enrichment bodies.
The present invention is further elaborated with reference to the accompanying drawings and examples, but protection scope of the present invention is not limited to reality
Apply example.
Embodiment 1:
It is 0.3mm and particle below that useless circuit board, which is crushed to partial size, is 4 by broken obtained useless circuit board particle screening
Grade.4 grades are respectively according to the nonmetallic enrichment body of following floatation process parameters separated and metal concentrate, wherein the 1st grade:
Mixing speed 1600rpm, aeration quantity 70L/h, pulp density 200g/L；2nd grade: mixing speed 1900rpm, aeration quantity 90L/
H, pulp density 150g/L；3rd grade: mixing speed 2000rpm, aeration quantity 100L/h, pulp density 120g/L；4th grade:
Mixing speed 2200rpm, aeration quantity 110L/h, pulp density 100g/L.Metal concentrate is milled to partial size with zirconia ball
0.074mm and hereinafter, be mixed into ore pulp according to liquid-solid ratio 1ml:1g and water, according to metal enrichment weight and vulcanizing agent quality it
Than adding vulcanized sodium for 1:0.3, vulcanize 2 hours in the case where temperature is 150 DEG C of environment.Then according to liquid-solid ratio be 500ml:50g with
Water is mixed into ore pulp, adds sec-octyl alcohol 200g/t, vulcanized sodium 20g/t, butyl xanthate 200g/t, and addition sodium carbonate adjustment pH values of pulp is
8, the flotation in 40 DEG C of warm water obtains the copper that purity is 95.6%.
Embodiment 2:
It is 0.3mm and particle below that useless circuit board, which is crushed to partial size, is 4 by broken obtained useless circuit board particle screening
Grade.4 grades are respectively according to the nonmetallic enrichment body of following floatation process parameters separated and metal concentrate, wherein the 1st grade:
Mixing speed 1600rpm, aeration quantity 70L/h, pulp density 200g/L；2nd grade: mixing speed 1900rpm, aeration quantity 90L/
H, pulp density 150g/L；3rd grade: mixing speed 2000rpm, aeration quantity 100L/h, pulp density 120g/L；4th grade:
Mixing speed 2200rpm, aeration quantity 110L/h, pulp density 100g/L.Metal concentrate is milled to partial size with zirconia ball
For 0.074mm and hereinafter, it is mixed into ore pulp according to liquid-solid ratio 1ml:1g and water, according to metal enrichment weight and vulcanizing agent quality
The ratio between for 1:0.4 add vulcanized sodium, temperature be 150 DEG C of environment under vulcanize 2.5 hours.Then it is 500ml according to liquid-solid ratio:
50g and water are mixed into ore pulp, sec-octyl alcohol dosage 200g/t, vulcanized sodium 20g/t, butyl xanthate 200g/t, and addition lime adjusts ore pulp
PH is 9, the flotation in 45 DEG C of warm water, obtains the copper that purity is 97.11%.
Claims (6)
1. hydro-thermal vulcanization-warm water flotation separation method of copper in a kind of useless circuit board, it is characterised in that: step is divided into useless circuit board
Broken classification, the FLOTATION SEPARATIONs of breakdown products, the hydro-thermal vulcanizing treatment of metal concentrate, copper is floating in metal sulphide enrichment body
Choosing separation；The specific steps are that:
(1) the broken classification of useless circuit board: it is 0.3mm and particle below that useless circuit board, which is crushed to partial size, is obtained broken
Useless circuit board particle screening be 4 grades；
(2) the broken particle of useless circuit board the FLOTATION SEPARATION of breakdown products: is utilized respectively dehydrated alcohol according to size fractionated
Decentralized processing is carried out, floating agent is not then added and carries out flotation, metal concentrate 1 and nonmetallic enrichment body 1 are obtained after flotation,
Metal concentrate 1 and nonmetallic enrichment body 1 are subjected to drying and processing, the metal concentrate 1 after drying and processing is subjected to flotation and is obtained
To metal concentrate 2 and nonmetallic enrichment body 2, the nonmetallic enrichment body 1 after drying is subjected to flotation and obtains 3 He of metal concentrate
Metal concentrate 2 and metal concentrate 3 are finally collected together to obtain the gold that copper content is 70% or more by nonmetallic enrichment body 3
Belong to enrichment body, copper recovery is 95% or more；
(3) the hydro-thermal vulcanizing treatment of metal concentrate: it is 0.074mm that the metal concentrate that step (2) obtains, which is milled to partial size,
And particle below, the metal concentrate after ball milling is mixed into ore pulp according to liquid-solid ratio 1ml:1g and water, according to metal enrichment
Weight and vulcanizing agent mass ratio are that 1:0.5-1:0.3 adds vulcanizing agent, vulcanize 2- in the case where temperature is 150 DEG C of -200 DEG C of environment
3 hours；
(4) metal sulphide is enriched with the FLOTATION SEPARATION of copper in body: by the metal concentrate after hydro-thermal vulcanizing treatment according to liquid-solid ratio
500ml:50g and water are mixed into ore pulp, and foaming agent 200g/t, activator 20g/t, collecting agent 200g/t are added in ore pulp, is added
Adding pH regulator adjustment pH values of pulp is 8-10, and the flotation in 40 DEG C -55 DEG C of warm water obtains the copper that purity is greater than 95%；Wherein rise
Infusion is sec-octyl alcohol, and activator is vulcanized sodium, and collecting agent is sodium n-butyl xanthate, and pH regulator is sodium carbonate, at least one in lime
Kind.
2. hydro-thermal vulcanization-warm water flotation separation method of copper in useless circuit board according to claim 1, which is characterized in that
In the broken classification step of the useless circuit board, 4 grades are the 1st grade respectively: partial size be 0.074mm and particle below,
2nd grade: partial size be 0.074mm-0.125mm particle, the 3rd grade: partial size be 0.125mm-0.15mm particle, the 4th
Grade: partial size is the particle of 0.15mm-0.3mm.
3. hydro-thermal vulcanization-warm water flotation separation method of copper in useless circuit board according to claim 1, which is characterized in that
In the FLOTATION SEPARATION step of the breakdown products, the floatation process of the 1st grade are as follows: mixing speed 1600rpm, aeration quantity 70L/h,
Pulp density 200g/L；The floatation process of 2nd grade are as follows: mixing speed 1900rpm, aeration quantity 90L/h, pulp density 150g/
L；The floatation process of 3rd grade are as follows: mixing speed 2000rpm, aeration quantity 100L/h, pulp density 120g/L；4th grade is floated
Select technique are as follows: mixing speed 2200rpm, aeration quantity 110L/h, pulp density 100g/L.
4. hydro-thermal vulcanization-warm water flotation separation method of copper in useless circuit board according to claim 1, which is characterized in that
In the hydro-thermal vulcanizing treatment step of the metal concentrate, ball-milling medium is zirconia ball, and vulcanizing agent is vulcanized sodium, NaHS
At least one of.
5. hydro-thermal vulcanization-warm water flotation separation method of copper in useless circuit board according to claim 1, which is characterized in that
In the metal sulphide enrichment body in the FLOTATION SEPARATION step of copper, floatation process are as follows: mixing speed 1600rpm-1700rpm fills
Tolerance 100L/h, pulp density 100g/L.
6. hydro-thermal vulcanization-warm water flotation separation method of copper in useless circuit board according to claim 1, which is characterized in that
In the metal sulphide enrichment body in the FLOTATION SEPARATION step of copper, need by 2 FLOTATION SEPARATION metal sulphide enrichment bodies
Copper.
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| CN201810706844.6A CN108940567B (en) | 2018-07-02 | 2018-07-02 | Hydrothermal vulcanization-warm water flotation separation method for copper in waste circuit board |
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| CN201810706844.6A CN108940567B (en) | 2018-07-02 | 2018-07-02 | Hydrothermal vulcanization-warm water flotation separation method for copper in waste circuit board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113399440A (en) * | 2021-07-19 | 2021-09-17 | 安徽绿洲危险废物综合利用有限公司 | Treatment process for preparing pure copper powder by using waste circuit board |
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| CN113399440A (en) * | 2021-07-19 | 2021-09-17 | 安徽绿洲危险废物综合利用有限公司 | Treatment process for preparing pure copper powder by using waste circuit board |
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