AU2021101480A4 - Method for Regulating Zinc Oxide Flotation foam - Google Patents
Method for Regulating Zinc Oxide Flotation foam Download PDFInfo
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- AU2021101480A4 AU2021101480A4 AU2021101480A AU2021101480A AU2021101480A4 AU 2021101480 A4 AU2021101480 A4 AU 2021101480A4 AU 2021101480 A AU2021101480 A AU 2021101480A AU 2021101480 A AU2021101480 A AU 2021101480A AU 2021101480 A4 AU2021101480 A4 AU 2021101480A4
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- Australia
- Prior art keywords
- foam
- prepared
- zinc oxide
- layer
- combined
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Classifications
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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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/26—Refining solutions containing zinc values, e.g. obtained by leaching zinc ores
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/34—Obtaining zinc oxide
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for regulating zinc oxide flotation foam and
belongs to the technical field of beneficiation. The method comprises the following
steps that firstly, a combined defoamer is prepared, wherein by weight ratio, tributyl
phosphate, dodecanethiol and kerosene are mixed in a proportion being (20-30):(3
6):(1-2) and are dissolved into water to be prepared into a solution with a weight
concentration being 20%; secondly, the solution prepared in the first step is stirred for
30 minutes till uniform and stable faint yellow liquid is formed; and thirdly, the prepared
combined defoamer is added in the flotation process to adjust foam, and the foam
amount and the foam structure are controlled in the zinc oxide flotation process by
controlling the adding amount of the combined defoamer, so that minerals can be
enriched more effectively, and quality of concentrates is improved.
Description
Method for Regulating Zinc Oxide Flotation foam
The invention relates to the technical field of beneficiation, in particular to
a method for regulating zinc oxide flotation foam, which is suitable for foam
control in zinc oxide sorting.
As we all know, zinc sulfide minerals are easier to be enriched by
conventional methods, the amount of foam is easy to control, and the foam
structure is good, which makes the flotation indexes better. As time elapses,
demand for production is increased, sulfide mineral resources of zinc are
gradually exhausted, grade of zinc oxide mineral resources is low, amount of
foam in the sorting process is large and difficult to control, and the foam
structure is poor, making beneficiation indexes unsatisfactory. It is of great
significance in controlling the amount of foam and the foam structure during
the flotation process of zinc oxide to effectively enrich the minerals due to the
fact that a large number of zinc oxide mineral resources are wasted.
Zinc oxide mineral is a secondary mineral of zinc, mainly in the form of
rhombohedrite, hemimorphite, willemite, hydrozincite, and zincite. Gangue
minerals are mainly calcite, dolomite, quartz, gypsum, clay, iron oxide and iron
hydroxide. The zinc oxide mineral is generally mudded seriously, with a large
mineral mud surface area, a fine particle size, strong adsorption capacity, and
consumption of a large number of reagents. While enriched and collected, the zinc oxide mineral is adsorbed onto the foam along with the minerals, making the foam structure worse to further affect the flotation indexes. Generally, a vulcanization-ammonium method is used for flotation so as to firstly remove mud on a zinc oxide surface and then add sodium sulfide to activate and regulate the pH value to be about 10-11.5, where sulfide ions obtained by ionization react with the zinc oxide mineral to form a vulcanized film, and are adhered onto zinc atoms on the surface of the mineral for vulcanizing the surface of the mineral, and zinc oxide is collected by adding primary amine like collectors. The primary amine like collectors, with foaming property, are relatively sensitive to mud, thereby making control on the foam amount in the floatation process difficult, causing the foam structure poor and making the flotation indexes poor.
The objective of the invention is to provide a method for regulating zinc
oxide floatation foam, which is capable of controlling the amount of foam and
the foam structure during zinc oxide flotation.
The objective of the invention is realized by adopting the following
technical scheme: A method for regulating zinc oxide floatation foam includes
the following steps:
(1) Tributyl phosphate, dodecanethiol and kerosene are mixed in a weight
ratio being (20-30):(3-6):(1-2) to obtain a mixture, and the mixture is dissolved
into water to prepare a solution with a weight concentration being 20%.
(2) The solution prepared in (1) is stirred for 30 minutes until uniform and
stable faint yellow liquid is formed.
And (3) in the flotation process, when a prepared combined defoamer is
added to adjust the foam, in order to facilitate the observation of the height
changes of a foam layer and changes of a foam structure, a baffle plate is used
to raise a flotation tank intermediate partition plate of a flotation machine to the
tank body to be as high as the two sides of the tank, so that a columnar space
is formed for adjusting the foam; after various reagents are added into the
columnar space, inflation is performed at fixed inflation amount, a foaming
condition of a slurry surface, the foam structure and the foam layer height
changes in the columnar space are observed, and if the foam layer in the
columnar space is stable in rising speed, and finally trends to be stable without
spilling out of the columnar space out of control after the mineral slurry is
inflated, the foam at the upper layer of the foam layer is changed from big to
small and from sticky to brittle; except from the top end of the bubble, other
bubble surfaces are basically mined; after the foam layer and the foam initially
reach this standard, it is indicated that the added combined defoamer is
enough, and then the foam layer height is recorded, inflation is stopped, and
the time t1/2 required for the foam layer to decay to half the original height is
recorded for representing stability of the foam; exact amount of the combined
defoamer is tested, and amount of the combined defoamer is adjusted on the
original basis to obtain multiple groups of half-lives t1/2 for comparison, and
the point at which the half-life t1/2 is the largest is the optimal amount point; if
the mineral slurry continuously spills out of the columnar space as the foaming
layer is too quick in rising speed and cannot be controlled after being inflated,
the foam at the upper layer of the foam layer is large and is continuously
ruptured, and the surface layer has a lot of viscous foam, it is indicated that amount of the added combined defoamer is insufficient, the prepared combined defoamer needs to continuously add for spraying water to the foam layer for leaching until the foam layer trends to be stable and the foam structure basically reaches the standard for a half-life t1/2 test.
Unless otherwise stated, the percentages stated in the invention are all
percentage by mass, based on 100% in total.
The invention has the outstanding advantages that:
The low surface tension and the poorly water-soluble physical property of
the combination of tributyl phosphate, dodecanethiol and kerosene are
effective to rapidly defoam the film of the formed foam in an unstable state,
and are supplemented with foam layer rinsing for reducing diameters of
surface bubbles, and increasing the bubble surface area, which is beneficial
for recycling materials, increasing a recovery rate, controlling the thickness of
the foam layer and eliminating a great deal of foam mud to effectively enrich
the minerals, improving the foam structure and improving the quality of
concentrate.
The technical solution of the invention is further described below by way of
examples.
Embodiment 1
According to a first example, a method for regulating zinc oxide floatation
foam included the following steps:
(1) Tributyl phosphate, dodecanethiol and kerosene were mixed in a
weight ratio being 20:5:1 to obtain a mixture, and the mixture was dissolved
into water to prepare a solution with a weight concentration being 20%.
(2) the solution prepared in (1) was stirred for 30 minutes until uniform and
stable faint yellow liquid was formed.
And (3) in the flotation process, when a prepared combined defoamer was
added to adjust the foam, in order to facilitate the observation of the height
changes of a foam layer and changes of a foam structure, a baffle plate was
used to raise a flotation tank intermediate partition plate of a flotation machine
to the tank body to be as high as the two sides of the tank, so that a columnar
space was formed for adjusting the foam; after various chemicals were added
into the columnar space, inflation was performed at fixed inflation amount, a
foaming condition of a slurry surface, the foam structure and the foam layer
height changes in the columnar space were observed, and if the foam layer in
the columnar space was stable in rising speed, and finally trended to be stable
without spilling out of the columnar space out of control after the mineral slurry
was inflated, the foam at the upper layer of the foam layer was changed from
big to small and from sticky to brittle; except from the top end of the bubble,
other bubble surfaces were basically mined; after the foam layer and the foam
initially reached this standard, it was indicated that the added combined
defoamer was enough, and then the foam layer height was recorded, inflation
was stopped, and the time t1/2 required for the foam layer to decay to half the
original height was recorded for representing stability of the foam; exact
amount of the combined defoamer was tested, and amount of the combined
defoamer was adjusted on the original basis to obtain multiple groups of half-lives t1/2 for comparison, and the point at which the half-life t1/2 is the largest is the optimal amount point; if the mineral slurry continuously spilled out of the columnar space as the foaming layer was too quick in rising speed and could not be controlled after being inflated, the foam at the upper layer of the foam layer was large and was continuously ruptured, and the surface layer had a lot of viscous foam, it was indicated that amount of the added combined defoamer was insufficient, the prepared combined defoamer needed to continuously add for spraying water to the foam layer for leaching until the foam layer trended to be stable and the foam structure basically reached the standard for a half-life t1/2 test.
Embodiment 2
According to a second example, a method for regulating zinc oxide
floatation foam included the following steps:
(1) A combined defoamer was prepared, where by weight ratio, tributyl
phosphate, dodecanethiol and kerosene were mixed in a proportion being
16:4:15 to obtain a mixture and the mixture was dissolved into water to be
prepared into a solution with a weight concentration being 20%.
The steps (2) and (3) were the same with those of the embodiment 1. Embodiment 3
According to a third example, a method for regulating zinc oxide floatation
foam included the following steps:
(1) a combined defoamer was prepared, where by weight ratio, tributyl
phosphate, dodecanethiol and kerosene were mixed in a proportion being
:2:1 to obtain a mixture and the mixture was dissolved into water to be
prepared into a solution with a weight concentration being 20%.
The steps (2) and (3) were the same with those of the embodiment 1.
The embodiment was an application example of the method for regulating
zinc oxide floatation foam, including the following steps:
Mineral raw materials: A zinc oxide ore in Yunnan was mainly
rhombohedrite with mineral properties as follows: the metal sulfide minerals in
raw minerals were sphalerite, galena, pyrite; the metal oxide minerals were
rhombohedrite and leucite; the gangue minerals were mainly calcite, dolomite
and quartz. The mineral composition was as follows: 0.62% of Pb, 7.08% of
Zn, 6.14% of zinc carbonate, 0.62% of zinc sulfides and 0.32% of other zinc.
Operation steps were as follows:
1. 300g of samples were taken, and the samples with mineral graining
fineness of 200 meshes accounted for 80%.
2. A reagent system and operation conditions were as follows: 200 g/t of
copper sulfate was added for activation, then 200 g/t of butyl xanthate was
added for flotation of zinc sulfides and lead sulfides, sodium carbonate was
stirred for 10 minutes to adjust the pH value to be 9-10, 1000 g/t of sodium
hexametaphosphate was added as an inhibitor, 300 g/t of a combined collector
was added, size mixing was performed for 10 minutes for aeration, foam layer
height and the foam structure were adjusted by adjusting amount of the
combined defoamer for roughening, 200g/t of sodium hexametaphosphate
was added for fining, 200g/t of sodium hexametaphosphate was added during
primary scavenging, 100 g/t of a combined collector was added, inflation was
performed after size mixing was performed for 5 minutes, the foam layer height
and the foam structure were adjusted by adjusting the amount of the combined
defoamer for secondary scavenging to obtain zinc concentrate with a yield of
20.06%, a grade of 24.2%, tailings of 1.81% and a recovery rate of 77.04%, so that better flotation indexes were obtained. The combined defoamer was obtained by mixing the combined defoamers prepared in Embodiments 1-3 for use.
The experiment used sodium carbonate as an adjustor to adjust the pH
value to be 9-10 without removing mud. In the case of taking sodium
hexametaphosphate as an inhibitor, a reagent combined by one or several
anionic chelate forms was used as a collector. The combination of several
high-carbon alcohol defoamers could effectively overcome the problem of
large foam and a poor foam structure.
Claims (3)
1. A method for regulating zinc oxide floatation foam, comprising the
following steps:
(1) a combined defoamer is prepared, wherein by weight ratio, tributyl
phosphate, dodecanethiol and kerosene are mixed in a proportion being
(20-30):(3-6):(1-2) to obtain a mixture and the mixture is dissolved into water to
be prepared into a solution with a weight concentration being 20%;
(2) the solution prepared in the first step is stirred for 30 minutes till
uniform and stable faint yellow liquid is formed
(3) in the flotation process, when a prepared combined defoamer is added
to adjust the foam, a baffle plate is used to raise a flotation tank intermediate
partition plate of a flotation machine to the tank body to be as high as the two
sides of the tank, so that a columnar space is formed for adjusting the foam;
after various reagents are added into the columnar space, inflation is
performed at fixed inflation amount, a foaming condition of a slurry surface, the
foam structure and the foam layer height changes in the columnar space are
observed, and if the foam layer in the columnar space is stable in rising speed,
and finally trends to be stable without spilling out of the columnar space out of
control after the mineral slurry is inflated, the foam at the upper layer of the
foam layer is changed from big to small and from sticky to brittle; except from
the top end of the bubble, other bubble surfaces are basically mined; after the
foam layer and the foam initially reach this standard, it is indicated that the
added combined defoamer is enough, and then the foam layer height is
recorded, inflation is stopped, and the time t1/2 required for the foam layer to
decay to half the original height is recorded for representing stability of the foam; exact amount of the combined defoamer is tested, and amount of the combined defoamer is adjusted on the original basis to obtain multiple groups of half-lives t1/2 for comparison, and the point at which the half-life t1/2 is the largest is the optimal amount point; if the mineral slurry continuously spills out of the columnar space as the foaming layer is too quick in rising speed and cannot be controlled after being inflated, the foam at the upper layer of the foam layer is large and is continuously ruptured, and the surface layer has a lot of viscous foam, it is indicated that amount of the added combined defoamer is insufficient, the prepared combined defoamer needs to continuously add for spraying water to the foam layer for leaching until the foam layer trends to be stable and the foam structure basically reaches the standard for a half-life t1/2 test.
2. The method for regulating zinc oxide floatation foam according to claim
1, wherein the prepared combined deformer is prepared by mixing tributyl
phosphate, dodecanethiol and kerosene in a weight ratio of 20:5:1 to obtain a
mixture, and dissolving the mixture into water to prepare a solution with a
concentration being 20%.
3. The method for regulating zinc oxide floatation foam according to claim
1, wherein the zinc oxide ore in Yunnan is mainly rhombohedrite with mineral
properties as follows: the metal sulfide minerals in raw minerals are sphalerite,
galena, pyrite; the metal oxide minerals are rhombohedrite and leucite; the
gangue minerals are mainly calcite, dolomite and quartz; and the mineral
composition is as follows: 0.62% of Pb, 7.08% of Zn, 6.14% of zinc carbonate,
0.62% of zinc sulfides and 0.32% of other zinc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021101480A AU2021101480A4 (en) | 2021-03-23 | 2021-03-23 | Method for Regulating Zinc Oxide Flotation foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021101480A AU2021101480A4 (en) | 2021-03-23 | 2021-03-23 | Method for Regulating Zinc Oxide Flotation foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021101480A4 true AU2021101480A4 (en) | 2021-05-13 |
Family
ID=75829041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021101480A Ceased AU2021101480A4 (en) | 2021-03-23 | 2021-03-23 | Method for Regulating Zinc Oxide Flotation foam |
Country Status (1)
| Country | Link |
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| AU (1) | AU2021101480A4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304888A (en) * | 2021-05-26 | 2021-08-27 | 广西中金岭南矿业有限责任公司 | Speed-division flotation process for sphalerite |
| CN113528855A (en) * | 2021-07-23 | 2021-10-22 | 昆明冶金研究院有限公司 | Method for extracting zinc from floating zinc oxide concentrate |
-
2021
- 2021-03-23 AU AU2021101480A patent/AU2021101480A4/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304888A (en) * | 2021-05-26 | 2021-08-27 | 广西中金岭南矿业有限责任公司 | Speed-division flotation process for sphalerite |
| CN113528855A (en) * | 2021-07-23 | 2021-10-22 | 昆明冶金研究院有限公司 | Method for extracting zinc from floating zinc oxide concentrate |
| CN113528855B (en) * | 2021-07-23 | 2023-02-14 | 昆明理工大学 | Method for extracting zinc from flotation zinc oxide concentrate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |