CN114054200B - Zinc oxide flotation recovery method based on gravity-flotation combined pre-desliming - Google Patents
Zinc oxide flotation recovery method based on gravity-flotation combined pre-desliming Download PDFInfo
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- CN114054200B CN114054200B CN202111369244.3A CN202111369244A CN114054200B CN 114054200 B CN114054200 B CN 114054200B CN 202111369244 A CN202111369244 A CN 202111369244A CN 114054200 B CN114054200 B CN 114054200B
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
Abstract
The invention provides a zinc oxide flotation recovery method based on combined heavy flotation and pre-desliming, which comprises the steps of pretreating zinc oxide ores to be selected and mixing the pretreated zinc oxide ores with water to obtain primary ore pulp; performing a zinc sulfide flotation process on the primary ore pulp to obtain zinc sulfide concentrate and zinc sulfide tailings; carrying out cyclone series grading gravity desliming on zinc sulfide tailings, and separating to obtain gravity mud and settled sand; adding water into the settled sand to adjust to obtain secondary ore pulp, and performing a flotation desliming process on the secondary ore pulp to obtain flotation slime and flotation desliming tailings; and (3) performing zinc oxide flotation process on the flotation deslimed tailings to obtain zinc oxide concentrate and tailings. In the zinc oxide flotation recovery process, the cyclone series graded gravity separation-flotation combined desliming process is adopted, so that the efficient and stable removal of the slime is realized, a good ore pulp environment is created for the flotation recovery of the zinc oxide ore difficult to select, the zinc resource in the ore is recovered to the utmost extent, and the zinc oxide flotation recovery process has important practical significance for the development and utilization of the zinc oxide ore difficult to select.
Description
Technical Field
The invention relates to the technical field of zinc oxide recovery, in particular to a zinc oxide flotation recovery method based on gravity-flotation combined pre-desliming.
Background
Along with the rapid development of national economy, the quantity of easily-selected zinc sulfide ores is less and less, and the development and utilization of difficultly-selected zinc oxide resources are more and more important. The zinc oxide minerals are mostly carbonates or silicates, such as calamine, calamine and the like, and the minerals are brittle, often embedded with other oxide minerals or gangue in a superfine manner, contain a large amount of primary slime, and produce secondary slime in the ore grinding process, and the presence of the slime can increase the consumption of medicinal agents in the flotation process of the zinc oxide minerals and possibly cause a 'cover' phenomenon, so that the floating of zinc oxide is influenced, and the flotation recovery of the zinc oxide is further influenced.
At present, the flotation method of zinc oxide ore is divided into sulfuration-amine flotation method, sulfuration-xanthate flotation method, fatty acid direct flotation method and the like, and the conventional sulfuration-flotation method is the most common flotation method in the industrial production of zinc oxide ore. The main problems of zinc oxide flotation are large dosage of medicament, high desliming control requirement, low zinc recovery rate and the like. The document "production practice of desliming operation in the flotation process of refractory zinc oxide ore" (nonferrous metals: ore dressing part, 2009, 5,11-13, and the like) discloses a gravity separation desliming method before zinc oxide flotation, which comprises the following specific processes: two-section closed circuit desliming by adopting a swirler. The desliming process of the cyclone before flotation well solves the problem of slime interference and obtains more ideal flotation indexes; in the production practice, however, the feeding pressure and the pulp amount are often inconsistent due to fluctuation of the pulp amount, so that grading is unstable, slime cannot be completely removed, and the flotation of zinc oxide is influenced; or the desliming amount is too large, so that the loss rate of zinc in the mud is higher.
The literature, research on grinding and desliming processes of certain zinc oxide ores (Huqin, Zhoujiqiang, Chenxiangqing. metal mines (supplement), 2009, 11,249 & 251) and experimental research on flotation and desliming of certain refractory zinc oxide ores (Yangming, Zhouyi, Tangxian and other nonferrous metals: ore dressing part, 2010, 4,5-5) disclose a flotation and desliming method before zinc oxide flotation, which comprises the following specific processes: adding a desliming reagent before zinc floatation for floatation desliming. Under the condition of equivalent desliming amount, compared with gravity desliming, the flotation desliming has slightly lower loss rate of zinc metal in slime and is more smoothly linked with the subsequent zinc oxide flotation. However, flotation desliming is only suitable for ores with low mud content, and once the mud content is too large, the number of desliming grooves is too large, the foam content is too large, and the foam flows across due to unsmooth outflow, so that great troubles are brought to field production management.
In view of the above, there is a need to design an improved zinc oxide flotation recovery method based on combined heavy flotation and pre-desliming to solve the above problems.
Disclosure of Invention
The invention aims to provide a zinc oxide flotation recovery method based on gravity-flotation combined pre-desliming, which realizes efficient and stable desliming of slime by adopting a cyclone graded gravity separation-flotation combined desliming process in the zinc oxide flotation recovery process, creates a good ore pulp environment for zinc oxide flotation recovery, and has important practical significance for development and utilization of zinc oxide resources difficult to select.
In order to realize the aim, the invention provides a zinc oxide flotation recovery method based on gravity-flotation combined pre-desliming, which comprises the following steps:
s1, preprocessing zinc oxide ore to be selected to obtain mineral powder, and mixing the mineral powder with water to obtain primary ore pulp; the mass fraction of the mineral powder in the primary ore pulp is 24-42%;
s2, adding a first preset reagent into the primary ore pulp obtained in the step S1 to perform a zinc sulfide flotation process, so as to obtain zinc sulfide concentrate and zinc sulfide tailings;
s3, carrying out cyclone classification gravity separation and desliming process on the zinc sulfide tailings in the step S2, and separating to obtain gravity separation slime and settled sand; the cyclone graded gravity separation desliming process is that n grades of cyclones are connected in series for graded desliming, wherein n is more than or equal to 2 and less than or equal to 5, and the settled sand is obtained by mixing settled sand for n times;
s4, adding water into the settled sand in the step S3 for adjustment to obtain secondary ore pulp with the settled sand mass fraction of 20% -30%, and adding a flotation desliming agent into the secondary ore pulp for a flotation desliming process to obtain flotation slime and flotation desliming tailings; the flotation desliming agent comprises sodium butyl xanthate and an Lp-1 reagent, and the addition amount of the sodium butyl xanthate and the Lp-1 reagent is 10-100 g per ton of raw ore;
s5, adding a second preset reagent into the flotation deslimed tailings obtained in the step S4 to perform a zinc oxide flotation process, and obtaining zinc oxide concentrate and tailings.
As a further improvement of the invention, the cyclone classification gravity desliming process is preferably a three-stage cyclone series classification desliming process, namely n is 3.
As a further improvement of the invention, the concrete mode of the three-stage cyclone in series connection for graded desliming is as follows: firstly inputting the zinc sulfide tailings into a cyclone with a holding cavity diameter of phi 220-260 mm, and separating to obtain primary overflow and primary settled sand; inputting the primary overflow into a cyclone with a diameter of phi 130-180 mm of the accommodating cavity, and separating to obtain secondary overflow and secondary settled sand; and inputting the secondary overflow into a cyclone with a holding cavity diameter phi of 60-90 mm, and separating to obtain tertiary sand setting and tertiary overflow, wherein the tertiary overflow is the gravity slurry.
As a further improvement of the invention, in step S4, the Lp-1 reagent comprises the following components in percentage by mass: 30 to 50 percent of oleic acid, 15 to 35 percent of hydroximic acid, 20 to 30 percent of sodium hydroxide and 5 to 10 percent of pinitol oil.
As a further improvement of the invention, the specific preparation method of the Lp-1 reagent comprises the following steps: firstly, mixing the oleic acid and the hydroximic acid in proportion, and uniformly stirring to obtain a brownish red liquid; adding the sodium hydroxide into the brownish red liquid, stirring until the sodium hydroxide becomes brown emulsion, and finally adding the pine oil, and uniformly stirring to obtain the Lp-1 reagent; the Lp-1 reagent can be used as the zinc oxide collector in the flotation desliming agent and the zinc oxide flotation process in the step S5.
As a further improvement of the invention, in step S1, the mineral powder with a particle size of less than 0.074mm in the primary ore pulp accounts for 60-75% of the total mass of the mineral powder, and the mineral powder with a particle size of less than 0.038mm accounts for 30-55% of the total mass of the mineral powder.
As a further improvement of the present invention, in step S2, the flotation process of zinc sulfide includes one roughing process, two scavenging processes, and two concentration processes, so as to obtain the zinc sulfide concentrate and the zinc sulfide tailings.
As a further improvement of the present invention, in step S5, the flotation process of zinc oxide includes two roughing, two scavenging and two concentrating processes, and finally the zinc oxide concentrate and the tailings are obtained.
As a further improvement of the present invention, the first preset medicament comprises: 50-500 g/t of copper sulfate, 10-100 g/t of butyl sodium xanthate and 5-50 g/t of pinitol oil which are used as roughing agents; 10-50 g/t of sodium butyl xanthate as a scavenging medicament; 100-500 g/t of water glass as a first zinc sulfide concentration agent.
As a further improvement of the present invention, the second preset medicament comprises: 1000-5000 g/t of sodium carbonate, 1000-6000 g/t of water glass, 100-600 g/t of sodium hexametaphosphate, 1000-4000 g/t of sodium sulfide, 10-100 g/t of CA-1 medicament and 20-200 g/t of Lp-1 medicament as a first zinc oxide roughing medicament; 500-3000 g/t of water glass as a secondary zinc oxide roughing medicament, 50-300 g/t of sodium hexametaphosphate, 750-3000 g/t of sodium sulfide, 5-50 g/t of CA-1 medicament and 10-100 g/t of Lp-1 medicament; 500-2000 g/t of sodium sulfide, 5-50 g/t of CA-1 agent and 10-100 g/t of Lp-1 agent are used as first zinc oxide scavenging agents; 100-1000 g/t of sodium sulfide, 5-50 g/t of CA-1 agent and 5-50 g/t of Lp-1 agent which are used as zinc oxide second scavenging agents; 100-1000 g/t of water glass, 10-100 g/t of sodium hexametaphosphate, 100-1000 g/t of sodium sulfide, 5-50 g/t of CA-1 medicament and 10-100 g/t of Lp-1 medicament which are used as zinc oxide first-time selection medicaments; the CA-1 medicament comprises the following components in percentage by mass: 2 to 5 percent of palmityl amine, 2 to 5 percent of acetic acid, 45 to 50 percent of water, 10 to 15 percent of hydroxyethyl cellulose and 30 to 35 percent of polyacrylic acid.
The invention has the beneficial effects that:
1. the invention provides a zinc oxide flotation recovery method based on combined heavy flotation and pre-desliming, which comprises the steps of mixing mineral powder subjected to pretreatment of zinc oxide ore to be selected with water to obtain primary ore pulp; performing a zinc sulfide flotation process on the primary ore pulp to obtain zinc sulfide concentrate and zinc sulfide tailings; performing a cyclone classification gravity separation desliming process on the zinc sulfide tailings, and separating to obtain gravity separation slime and settled sand; adding water into the settled sand to adjust to obtain secondary ore pulp, and performing a flotation desliming process on the secondary ore pulp to obtain flotation slime and flotation desliming tailings; and (3) performing a zinc oxide flotation process on the flotation desliming tailings to obtain zinc oxide concentrate and tailings. According to the method, in the zinc oxide flotation recovery process, a combined desliming process of cyclone series graded gravity separation and flotation is adopted, so that the efficient and stable removal of the slime is realized, a good ore pulp environment is created for the zinc oxide flotation recovery, and the method has important practical significance for the development and utilization of the zinc oxide resources which are difficult to select.
2. The invention adopts the combined desliming process of cyclone graded gravity separation and flotation, and solves the problems of fluctuation, unstable grading and unclean slime separation caused by insufficient ore pulp when the cyclone is singly used for gravity separation and desliming; and the sand setting port of the cyclone can be adjusted according to the ore mud content and the size fraction step-by-step characteristics of the slime and the like in the actual situation, so that the slime is removed as much as possible, the loss rate of zinc in the slime is reduced, and the problem that the flotation and desliming are not suitable for the ore with the slime content larger than 30% is solved. By adopting the method, the zinc sulfide concentrate and the zinc oxide concentrate with higher grade can be obtained, meanwhile, the flotation slime with lower grade and the gravity slime with lower grade can be obtained, and the zinc resource in the zinc oxide ore can be recovered to a greater extent.
3. The multistage cyclones adopted by the invention are connected in series for graded desliming, and the method has the characteristics of small occupied area, large treatment capacity, good separation effect and low investment, and is particularly effective for removing the mud with light density and fine granularity. Preferably, a three-stage cyclone series grading desliming process is adopted, and the types of the used cyclones are respectively a cyclone with a holding cavity diameter of phi 220-260 mm and a cyclone with a diameter of phi 60-90 mm of phi 130-180 mm; the three types of cyclones are adopted for three-stage desliming, the desliming process is relatively applicable and stable, the desliming degree is optimal, and the influence of slime on the flotation recovery of zinc oxide can be effectively reduced.
4. The invention adopts a novel Lp-1 flotation desliming agent in the flotation desliming process, wherein the Lp-1 agent comprises oleic acid, hydroximic acid, sodium hydroxide and terpineol oil; the flotation desliming agent is suitable for being used as a flotation desliming agent and a zinc oxide collector of zinc oxide ores, and has the characteristics of low use temperature, small use amount, small viscosity, high dispersibility and good selectivity.
Drawings
Fig. 1 is a schematic flow diagram of the zinc oxide flotation recovery method based on gravity-flotation combined with pre-desliming according to the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, a zinc oxide flotation recovery method based on gravity-flotation combined with pre-desliming comprises the following steps:
s1, preprocessing the zinc oxide ore to be selected to obtain mineral powder, and mixing the mineral powder with water to obtain primary ore pulp; the mass fraction of the mineral powder in the primary ore pulp is 24-42%; solid particles with the granularity of less than 0.074mm in the primary ore pulp account for 60-75% of the total mass of the ore powder, and solid particles with the granularity of less than 0.038mm account for 30-55% of the total mass of the ore powder;
s2, adding a first preset reagent into the primary ore pulp obtained in the step S1 to perform a zinc sulfide flotation process to obtain zinc sulfide concentrate and zinc sulfide tailings; the first pre-set medicament comprises: 50-500 g/t of copper sulfate, 10-100 g/t of butyl sodium xanthate and 5-50 g/t of pinitol oil which are used as roughing agents; 10-50 g/t of sodium butyl xanthate as a scavenging medicament; 100-500 g/t of water glass as a first zinc sulfide concentration agent;
specifically, the flotation process of the zinc sulfide comprises a primary roughing process, a secondary scavenging process and a secondary concentration process, and finally zinc sulfide concentrate and zinc sulfide tailings are obtained; the method specifically comprises the following steps:
s21, performing zinc sulfide roughing on the primary ore pulp to obtain zinc sulfide roughing concentrate and zinc sulfide roughing tailings;
s22, performing first zinc sulfide scavenging on the zinc sulfide roughing tailings obtained in the step S21 to obtain first zinc sulfide scavenging concentrate and first zinc sulfide scavenging tailings; wherein the zinc sulfide scavenging first concentrate returns to the zinc sulfide roughing step of step S21;
s23, performing secondary zinc sulfide scavenging on the zinc sulfide scavenged first tailings obtained in the step S22 to obtain zinc sulfide scavenged second concentrate and zinc sulfide tailings; wherein the zinc sulphide scavenging second concentrate is returned to the first zinc sulphide scavenging step of step S22;
s24, performing first zinc sulfide concentration on the zinc sulfide rough concentration concentrate obtained in the step S21 to obtain first zinc sulfide concentration concentrate and first zinc sulfide concentration tailings; wherein the first tailings of the zinc sulfide fine concentration are returned to the zinc sulfide rough concentration step of the step S21;
s25, performing secondary zinc sulfide concentration on the first zinc sulfide concentrated selection concentrate obtained in the step S24 to obtain zinc sulfide concentrate and second zinc sulfide concentrated selection tailings; wherein the second tailings of zinc sulfide concentration are returned to the first zinc sulfide concentration step of step S24;
s3, carrying out cyclone classification gravity separation and desliming process on the zinc sulfide tailings obtained in the step S2, and separating to obtain gravity separated slime and settled sand; the cyclone graded gravity separation desliming process is that n grades of cyclones are connected in series for graded desliming, wherein n is more than or equal to 2 and less than or equal to 5, and settled sand is obtained by mixing settled sand for n times;
the cyclone grading gravity separation desliming process is preferably a three-stage cyclone series grading desliming process, namely n is 3; the concrete mode of the three-stage cyclone in series connection for graded desliming is as follows: firstly inputting zinc sulfide tailings into a cyclone with a holding cavity diameter of phi 220-260 mm, and separating to obtain primary overflow and primary settled sand; inputting the primary overflow into a cyclone with a diameter phi of 130-180 mm of an accommodating cavity, and separating to obtain secondary overflow and secondary settled sand; and inputting the secondary overflow into a cyclone with the diameter of phi 60-90 mm of the accommodating cavity, and separating to obtain tertiary sand setting and tertiary overflow, wherein the tertiary overflow is gravity sludge.
S4, adding water into the settled sand obtained in the step S3 for adjustment to obtain secondary ore pulp with the settled sand mass fraction of 20% -30%, adding a flotation desliming agent into the secondary ore pulp for a flotation desliming process to obtain flotation slime and flotation desliming tailings; the flotation desliming agent comprises sodium butyl xanthate and an Lp-1 reagent, and the addition amount of the sodium butyl xanthate and the Lp-1 reagent is 10-100 g per ton of raw ore;
the Lp-1 reagent comprises the following components in percentage by mass: 30 to 50 percent of oleic acid, 15 to 35 percent of hydroximic acid, 20 to 30 percent of sodium hydroxide and 5 to 10 percent of pinitol oil; the specific preparation method of the Lp-1 reagent comprises the following steps: firstly, mixing oleic acid and hydroximic acid in proportion, and uniformly stirring to obtain a brownish red liquid; adding sodium hydroxide into the brownish red liquid, stirring until the mixture becomes brown emulsion, finally adding the terpineol oil, and uniformly stirring to obtain an Lp-1 reagent serving as a flotation desliming agent and a zinc oxide collector;
particularly, the invention adopts a combined desliming process of cyclone graded gravity separation and flotation, and solves the problems of fluctuation, unstable grading and unclean slime separation caused by insufficient ore pulp when the cyclone is used alone for gravity separation and desliming; the sand setting port of the cyclone can be adjusted according to the ore mud content and the size fraction step-by-step characteristics of the slime and the like in the actual situation, so that the slime is removed as much as possible, the loss rate of zinc in the slime is reduced, and the problem that the flotation and desliming are not suitable for the ore with the slime content larger than 30% is solved;
s5, adding a second preset reagent into the flotation desliming tailings obtained in the step S4 to perform a zinc oxide flotation process to obtain zinc oxide concentrate and tailings; wherein the second predetermined medicament comprises: 1000-5000 g/t of sodium carbonate, 1000-6000 g/t of water glass, 100-600 g/t of sodium hexametaphosphate, 1000-4000 g/t of sodium sulfide, 10-100 g of CA-1 and 20-200 g/t of Lp-1 which are used as primary crude selection medicaments of zinc oxide; 500-3000 g/t of water glass as a secondary zinc oxide roughing reagent, 50-300 g/t of sodium hexametaphosphate, 750-3000 g/t of sodium sulfide, 5-50 g/t of CA-1 and 10-100 g/t of Lp-1; 500-2000 g/t of sodium sulfide, 5-50 g/t of CA-1 and 10-100 g/t of Lp-1 which are used as zinc oxide first scavenging agents; 100-1000 g/t of sodium sulfide, 5-50 g/t of CA-1 and 5-50 g/t of Lp-1 as a second scavenging agent of zinc oxide; 100-1000 g/t of water glass, 10-100 g/t of sodium hexametaphosphate, 100-1000 g/t of sodium sulfide, 5-50 g/t of CA-1 and 10-100 g/t of Lp-1 which are used as zinc oxide first-time concentration reagents; the CA-1 reagent comprises the following components in percentage by mass: 2 to 5 percent of palmitin, 2 to 5 percent of acetic acid, 45 to 50 percent of water, 10 to 15 percent of hydroxyethyl cellulose and 30 to 35 percent of polyacrylic acid;
specifically, the flotation process of the zinc oxide comprises two times of rough concentration, two times of scavenging and two times of fine concentration processes, and finally zinc oxide concentrate and tailings are obtained; the method specifically comprises the following steps:
s51, performing primary zinc oxide roughing on the flotation desliming tailings to obtain a zinc oxide roughing first concentrate and zinc oxide roughing first tailings;
s52, performing secondary zinc oxide roughing on the zinc oxide roughing first tailings obtained in the step S51 to obtain zinc oxide roughing second concentrate and zinc oxide roughing second tailings;
s53, performing primary zinc oxide scavenging on the second zinc oxide roughing tailings obtained in the step S52 to obtain first zinc oxide scavenging concentrate and first zinc oxide scavenging tailings; wherein the zinc oxide scavenging first concentrate returns to the first zinc oxide roughing step of step S51;
s54, performing secondary zinc oxide scavenging on the zinc oxide scavenging first tailings obtained in the step S53 to obtain zinc oxide scavenging second concentrates and tailings; wherein the zinc oxide scavenging second concentrate returns to the first zinc oxide scavenging step of step S53;
s55, mixing the first zinc oxide roughing concentrate obtained in the step S51 with the second zinc oxide roughing concentrate obtained in the step S52, and then carrying out first zinc oxide concentration to obtain a first zinc oxide concentrating concentrate and first zinc oxide concentrating tailings; wherein the first tailings of the zinc oxide concentration are returned to the first zinc oxide scavenging step of the step S53;
s56, performing secondary zinc oxide concentration on the first zinc oxide concentration concentrate obtained in the step S55 to obtain a zinc oxide concentrate and second zinc oxide concentration tailings; wherein the zinc oxide concentration second tailings are returned to the first zinc oxide concentration step of step S55.
Example 1
Embodiment 1 provides a zinc oxide flotation recovery method based on gravity-flotation combined pre-desliming, which includes the following steps:
s1, pretreating zinc oxide ore to be selected to obtain mineral powder, and mixing the mineral powder with water to obtain primary ore pulp; the mass fraction of the mineral powder in the primary ore pulp is 36%; solid particles with the particle size of less than 0.074mm in the primary ore pulp account for 69 percent of the total mass of the ore powder;
s2, performing a zinc sulfide flotation process of primary roughing, secondary scavenging and secondary concentration on the primary ore pulp obtained in the step S1 to obtain zinc sulfide concentrate and zinc sulfide tailings, wherein the zinc sulfide flotation process specifically comprises the following steps:
s21, adding 250g/t of copper sulfate, 50g/t of butyl sodium xanthate and 17g/t of pinitol into the primary ore pulp, and performing zinc sulfide roughing for 3 minutes to obtain zinc sulfide roughing concentrate and zinc sulfide roughing tailings;
s22, adding 33g/t of butyl sodium xanthate into the zinc sulfide roughing tailings, and performing zinc sulfide scavenging for the first time for 2 minutes to obtain a first zinc sulfide scavenging concentrate and a first zinc sulfide scavenging tailings, wherein the first zinc sulfide scavenging concentrate returns to the step S21 of zinc sulfide roughing;
s23, adding 17g/t of butyl sodium xanthate into the zinc sulfide scavenging first tailings, scavenging zinc sulfide for the second time for 2 minutes, and obtaining a zinc sulfide scavenging second concentrate and final zinc sulfide tailings, wherein the zinc sulfide scavenging second concentrate returns to the S22 zinc sulfide scavenging step for the first time;
s24, adding 167g/t of water glass into the zinc sulfide roughing concentrates, and carrying out first zinc sulfide concentration for 3 minutes to obtain first zinc sulfide concentrated concentration concentrates and first zinc sulfide concentrated concentration tailings, wherein the first zinc sulfide concentrated concentration tailings return to the step S21 of zinc sulfide roughing;
s25, performing second zinc sulfide concentration on the first zinc sulfide concentration concentrate for 2 minutes to obtain a final zinc sulfide concentrate and second zinc sulfide concentration tailings, wherein the second zinc sulfide concentration tailings return to the step S24 of the first zinc sulfide concentration;
s3, inputting the zinc sulfide tailings in the step S2 into a cyclone with a holding cavity diameter of phi 250mm, and separating to obtain primary overflow and primary settled sand; inputting the primary overflow into a cyclone with the diameter of phi 150mm of the accommodating cavity, and separating to obtain secondary overflow and secondary settled sand; inputting the secondary overflow into a swirler with a holding cavity diameter of phi 75mm, and separating to obtain tertiary sand setting and tertiary overflow; obtaining gravity sludge through tertiary overflow; combining the primary sand setting, the secondary sand setting and the tertiary sand setting, and then performing subsequent flotation desliming operation;
s4, adding water into the settled sand obtained in the step S3 for adjustment to obtain secondary ore pulp with the settled sand mass fraction of 30%, adding 67g/t of sodium butyl xanthate and 67g/t of Lp-1 reagent for a flotation desliming process for 5 minutes to obtain flotation slime and flotation desliming tailings;
s5, performing zinc oxide flotation process of two times of rough concentration, two times of scavenging and two times of fine concentration on the flotation desliming tailings obtained in the step S4 to obtain zinc oxide concentrate and tailings; the method specifically comprises the following steps:
s51, adding 2000g/t of sodium carbonate, 3000g/t of water glass, 300g/t of sodium hexametaphosphate, 2668g/t of sodium sulfide, 50g of CA-1 and 100g/t of Lp-1 into the flotation desliming tailings for the first time of zinc oxide roughing for 3 minutes to obtain first zinc oxide roughing concentrate and first zinc oxide roughing tailings;
s52, adding 1000g/t of water glass, 100g/t of sodium hexametaphosphate, 1000g/t of sodium sulfide, 33g of CA-1 and 67g/t of Lp-1 into the zinc oxide roughing first tailings obtained in the step S51, and performing secondary zinc oxide roughing for 3 minutes to obtain a zinc oxide roughing second concentrate and a zinc oxide roughing second tailings;
s53, adding 667g/t of sodium sulfide, 17g/t of CA-1 and 33g/t of Lp-1 into the zinc oxide roughing second tailings obtained in the step S52, and performing first zinc oxide scavenging for 2 minutes to obtain first zinc oxide scavenging concentrate and first zinc oxide scavenging tailings; wherein the zinc oxide scavenging first concentrate returns to the first zinc oxide roughing step of step S51;
s54, adding 334g/t of sodium sulfide into the zinc oxide scavenging first tailings obtained in the step S53, and carrying out secondary zinc oxide scavenging for 2 minutes by using 10g/t of CA-1 and 17g/t of Lp-1 to obtain zinc oxide scavenging second concentrate and tailings; wherein the zinc oxide scavenging second concentrate returns to the first zinc oxide scavenging step of step S53;
s55, mixing the first zinc oxide roughing concentrate obtained in the step S51 with the second zinc oxide roughing concentrate obtained in the step S52, adding 333/t of water glass, 33g/t of sodium hexametaphosphate, 334g/t of sodium sulfide, 10g/t of CA-1 and 17/t of Lp-1, and carrying out first zinc oxide concentration for 3 minutes to obtain a first zinc oxide concentrating concentrate and first zinc oxide concentrating tailings; wherein the first tailings of zinc oxide concentration are returned to the first zinc oxide scavenging step of the step S53;
s56, performing secondary zinc oxide concentration on the first zinc oxide concentration concentrate obtained in the step S55 for 2 minutes to obtain a zinc oxide concentrate and second zinc oxide concentration tailings; wherein the zinc oxide concentration second tailings are returned to the first zinc oxide concentration step of step S55.
The zinc oxide ore used in this example contains 6.89% zinc, and the zinc oxidation rate is 80.12%; the experimental data obtained in this example are shown in the following table.
Table 1 experimental data obtained in example 1
It can be seen from table 1 that by applying the beneficiation process flow of the present invention, higher-grade zinc sulfide concentrate and zinc oxide concentrate are obtained, and meanwhile, lower-grade flotation slime and lower-grade gravity slime are obtained, and the flotation slime and gravity slime can also be used as auxiliary materials in industrial production using zinc oxide as a raw material in actual production. The zinc grade in the tailings in the table 1 is only 0.71%, which shows that the process has a good recovery effect on the refractory zinc oxide ore and recovers the zinc resource in the refractory ore to a great extent.
Comparative example
The comparative example provides a zinc oxide flotation recovery method, and compared with the example 1, the difference is that in the comparative example, in the whole process flow of the zinc oxide flotation recovery, the re-flotation combined pre-desliming process is not adopted, and the rest is substantially the same as the example 1, and the details are not repeated.
Comparative example in the course of the experiment, only zinc sulfide concentrate and zinc oxide concentrate were produced from zinc ore in the recovered minerals without the heavy flotation desliming process treatment of the present invention.
Example 2
Embodiment 2 provides a zinc oxide flotation recovery method based on re-flotation combined pre-desliming, which is different from embodiment 1 in that the dosage of the medicament in each step is adjusted, specifically adjusted as follows, and the rest is substantially the same as embodiment 1, and is not described herein again.
In step S2, roughly selecting zinc sulfide medicaments, namely 200g/t of copper sulfate, 40g/t of butyl sodium xanthate and 15g/t of pine oil, scavenging the first zinc sulfide medicament, namely 20g/t of butyl sodium xanthate, scavenging the second zinc sulfide medicament, namely 10g/t of butyl sodium xanthate, and finely selecting the first zinc sulfide medicament, namely 200g/t of water glass;
in step S4, the flotation desliming agent is 50g/t of butyl sodium xanthate and 50g/t of Lp-1 agent;
in step S5, zinc oxide is roughly selected for the first time, namely 3000g/t of sodium carbonate, 2500g/t of water glass, 250g/t of sodium hexametaphosphate, 3000g/t of sodium sulfide, 60g of CA-1 and 120g/t of Lp-1; 1250g/t of zinc oxide crude selection medicament water glass, 125g/t of sodium hexametaphosphate, 1500g/t of sodium sulfide, 30g/t of CA-1 and 60g/t of Lp-1; the zinc oxide first scavenging medicament comprises 1000g/t of sodium sulfide, 20g/t of CA-1 and 40g/t of Lp-1; 500g/t of zinc oxide second scavenging medicament sodium sulfide, 10g/t of CA-1 and 20g/t of Lp-1; zinc oxide first concentration medicament water glass 500g/t, sodium hexametaphosphate 50g/t, sodium sulfide 500g/t, CA-1 10g/t and Lp-1 20 g/t.
The zinc oxide ore used in this example contained 7.57% zinc and had a zinc oxidation rate of 76.51%; the experimental data obtained in this example are shown in the following table.
Table 2 experimental data obtained in example 2
Example 3
Embodiment 3 provides a zinc oxide flotation recovery method based on re-flotation combined pre-desliming, which is different from embodiment 1 in that the mass percentage of the mineral powder in the primary ore pulp and the mass percentage of the mineral powder smaller than 0.074mm in step S1, the concentration of the secondary ore pulp in step S4, and the dosage of the chemicals in each step are adjusted as follows, and the rest is substantially the same as embodiment 1, and is not described again.
In step S1, the mass percentage of the mineral powder in the primary ore pulp is not 33%, and the mass percentage of the mineral powder smaller than 0.074mm is 71%;
in step S2, zinc sulfide crude selection medicaments of 300g/t copper sulfate, 60g/t butyl sodium xanthate and 20g/t pine oil, a first zinc sulfide scavenging medicament of 30g/t butyl sodium xanthate, a second zinc sulfide scavenging medicament of 15g/t butyl sodium xanthate and a first zinc sulfide selection medicament of 300g/t water glass;
in step S4, the mass fraction of the settled sand in the secondary ore pulp is 28%, and the flotation desliming agents are 70g/t of butyl sodium xanthate and 70g/t of Lp-1 agent;
in step S5, zinc oxide is roughly selected for the first time, namely 2500g/t of sodium carbonate, 2000g/t of water glass, 200g/t of sodium hexametaphosphate, 2000g/t of sodium sulfide, 40g of CA-1 and 80g/t of Lp-1; 1200g/t of zinc oxide crude selection medicament water glass, 120g/t of sodium hexametaphosphate, 1000g/t of sodium sulfide, 20g/t of CA-1 and 40g/t of Lp-1; 600g/t of zinc oxide first scavenging medicament sodium sulfide, 15g/t of CA-1 and 30g/t of Lp-1; 300g/t of zinc oxide second scavenging medicament sodium sulfide, 10g/t of CA-1 and 15g/t of Lp-1; zinc oxide first concentration reagent water glass 400g/t, sodium hexametaphosphate 40g/t, sodium sulfide 300g/t, CA-1 10g/t and Lp-1 15 g/t.
The zinc oxide ore used in this example contained 7.44% zinc, and the zinc oxidation rate was 70.02%; the experimental data obtained in this example are shown in the following table.
Table 3 experimental data obtained in example 3
Example 4
Embodiment 4 provides a zinc oxide flotation recovery method based on re-flotation combined pre-desliming, which is different from embodiment 1 in that the mass percentage of the mineral powder in the primary ore pulp and the mass percentage of the mineral powder smaller than 0.074mm in step S1, the concentration of the secondary ore pulp in step S4, and the dosage of the chemicals in each step are adjusted as follows, and the rest is substantially the same as embodiment 1, and is not described again.
In step S1, the mass percentage of the mineral powder in the primary ore pulp is not 39%, and the mass percentage of the mineral powder smaller than 0.074mm is 67%;
in step S2, roughly selecting zinc sulfide medicaments, namely 150g/t of copper sulfate, 30g/t of butyl sodium xanthate and 10g/t of pine oil, scavenging zinc sulfide medicaments, namely 15g/t of butyl sodium xanthate for the first time, scavenging zinc sulfide medicaments, namely 10g/t of butyl sodium xanthate for the second time, and finely selecting zinc sulfide medicaments, namely water glass for the first time, wherein 250g/t of water glass is adopted;
in step S4, the mass fraction of the settled sand in the secondary ore pulp is 30%, and the flotation desliming agents are 60g/t of butyl sodium xanthate and 80g/t of Lp-1 agent;
in step S5, zinc oxide crude selection medicaments of 4000g/t of sodium carbonate, 3500g/t of water glass, 350g/t of sodium hexametaphosphate, 2500g/t of sodium sulfide, 50g of CA-1 and 100g/t of Lp-1 for the first time; 2000g/t of zinc oxide crude selection medicament water glass, 200g/t of sodium hexametaphosphate, 1200g/t of sodium sulfide, 25g/t of CA-1 and 50g/t of Lp-1; the zinc oxide first scavenging medicament comprises 800g/t of sodium sulfide, 15g/t of CA-1 and 30g/t of Lp-1; 400g/t of zinc oxide second scavenging medicament sodium sulfide, 10g/t of CA-1 and 20g/t of Lp-1; the zinc oxide first concentration medicament is 600g/t of water glass, 60g/t of sodium hexametaphosphate, 400g/t of sodium sulfide, 10g/t of CA-1 and 20g/t of Lp-1.
The zinc oxide ore used in this example contained 7.38% zinc, with a zinc oxidation rate of 86.19%; the experimental data obtained in this example are shown in the following table.
Table 4 experimental data obtained in example 4
Example 5
Embodiment 5 provides a zinc oxide flotation recovery method based on re-flotation combined pre-desliming, which is different from embodiment 1 in that the mass percentage of the mineral powder in the primary ore pulp and the mass percentage of the mineral powder smaller than 0.074mm in step S1, the concentration of the secondary ore pulp in step S4, and the dosage of the chemicals in each step are adjusted as follows, and the rest is substantially the same as embodiment 1, and is not described again.
In step S1, the mass percentage of the mineral powder in the primary ore pulp is not 30%, and the mass percentage of the mineral powder smaller than 0.074mm is 73%;
in step S2, the zinc sulfide crude selection medicament, namely 400g/t of copper sulfate, 70g/t of butyl sodium xanthate and 25g/t of pine oil, the first zinc sulfide scavenging medicament, namely 35g/t of butyl sodium xanthate, the second zinc sulfide scavenging medicament, namely 20g/t of butyl sodium xanthate, and the first zinc sulfide selection medicament, namely 400g/t of water glass;
in step S4, the mass fraction of the settled sand in the secondary ore pulp is 25%, and the flotation desliming agents are 50g/t of butyl sodium xanthate and 70g/t of Lp-1 agent;
in step S5, zinc oxide first roughing medicaments sodium carbonate 3500g/t, water glass 4000g/t, sodium hexametaphosphate 400g/t, sodium sulfide 3500g/t, 70g of CA-1 and 140g/t of Lp-1; 2000g/t of zinc oxide crude selection medicament water glass, 200g/t of sodium hexametaphosphate, 1600g/t of sodium sulfide, 35g/t of CA-1 and 70g/t of Lp-1; the zinc oxide first scavenging medicament comprises 1000g/t of sodium sulfide, 25g/t of CA-1 and 50g/t of Lp-1; 500g/t of zinc oxide second scavenging medicament sodium sulfide, 15g/t of CA-1 and 30g/t of Lp-1; the zinc oxide first concentration medicament is 700g/t of water glass, 70g/t of sodium hexametaphosphate, 500g/t of sodium sulfide, 15g/t of CA-1 and 30g/t of Lp-1.
The zinc oxide ore used in this example contained 7.69% zinc, with a zinc oxidation rate of 78.37%; the experimental data obtained in this example are shown in the following table.
Table 5 experimental data obtained in example 5
From the experimental data of the embodiments 2 to 5, it can be seen that the combined desliming process of cyclone classification gravity separation-flotation is added in the beneficiation process flow of the zinc oxide flotation recovery process, so that higher-grade zinc sulfide concentrate and zinc oxide concentrate are obtained, lower-grade flotation slime and lower-grade gravity slime are obtained, and the zinc resource in the ore is recovered to a greater extent; the method realizes the efficient and stable removal of the slime, creates a good ore pulp environment for the flotation recovery of the zinc oxide, and has important practical significance for the development and utilization of zinc oxide resources which are difficult to select.
In conclusion, the invention provides a zinc oxide flotation recovery method based on the combination of gravity flotation and pre-desliming, which comprises the steps of mixing mineral powder subjected to pretreatment of zinc oxide ore to be selected with water to obtain primary ore pulp; performing a zinc sulfide flotation process on the primary ore pulp to obtain zinc sulfide concentrate and zinc sulfide tailings; performing a cyclone classification gravity separation desliming process on the zinc sulfide tailings, and separating to obtain gravity separation slime and settled sand; adding water into the settled sand to adjust to obtain secondary ore pulp, and performing a flotation desliming process on the secondary ore pulp to obtain flotation slime and flotation desliming tailings; and (3) performing a zinc oxide flotation process on the flotation desliming tailings to obtain zinc oxide concentrate and tailings. The combined desliming process of cyclone graded gravity separation and flotation solves the problems of fluctuation, unstable classification and unclean slime separation caused by insufficient ore pulp when the cyclone is used for gravity separation and desliming; and the sand setting port of the cyclone can be adjusted according to the ore mud content and the size fraction step-by-step characteristics of the slime and the like in the actual situation, so that the slime is removed as much as possible, the loss rate of zinc in the slime is reduced, and the problem that the flotation and desliming are not suitable for the ore with the slime content of more than 30% is solved. In the zinc oxide flotation recovery process, the combined desliming process of cyclone graded gravity separation-flotation is adopted, so that the efficient and stable removal of the slime is realized, a good ore pulp environment is created for the zinc oxide flotation recovery, and the method has important practical significance for the development and utilization of the zinc oxide resources which are difficult to select.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (9)
1. A zinc oxide flotation recovery method based on gravity-flotation combined pre-desliming is characterized by comprising the following steps:
s1, preprocessing zinc oxide ore to be selected to obtain mineral powder, and mixing the mineral powder with water to obtain primary ore pulp; the mass fraction of the mineral powder in the primary ore pulp is 24-42%;
s2, adding a first preset reagent into the primary ore pulp obtained in the step S1 to perform a zinc sulfide flotation process, so as to obtain zinc sulfide concentrate and zinc sulfide tailings;
s3, carrying out cyclone classification gravity separation and desliming process on the zinc sulfide tailings in the step S2, and separating to obtain gravity separation slime and settled sand; the cyclone graded gravity separation desliming process is that n grades of cyclones are connected in series for graded desliming, wherein n is more than or equal to 2 and less than or equal to 5, and the settled sand is obtained by mixing settled sand for n times;
s4, adding water into the settled sand obtained in the step S3 for adjustment to obtain secondary ore pulp with the settled sand mass fraction of 20% -30%, and adding a flotation desliming agent into the secondary ore pulp for a flotation desliming process to obtain flotation slime and flotation desliming tailings; the flotation desliming agent comprises sodium butyl xanthate and an Lp-1 reagent, and the addition amount of the sodium butyl xanthate and the Lp-1 reagent is 10-100 g per ton of raw ore;
the Lp-1 reagent comprises the following components in percentage by mass: 30 to 50 percent of oleic acid, 15 to 35 percent of hydroximic acid, 20 to 30 percent of sodium hydroxide and 5 to 10 percent of pinitol oil;
s5, adding a second preset reagent into the flotation deslimed tailings obtained in the step S4 to perform a zinc oxide flotation process, and obtaining zinc oxide concentrate and tailings.
2. The zinc oxide flotation recovery method based on the combination of gravity flotation and pre-desliming according to claim 1, wherein the cyclone classification gravity desliming process is three-stage cyclone series classification desliming, namely n-3.
3. The zinc oxide flotation recovery method based on the combination of gravity and flotation and pre-desliming as claimed in claim 2, wherein the three-stage cyclone is connected in series for classification desliming in a specific way: firstly inputting the zinc sulfide tailings into a cyclone with a holding cavity diameter of phi 220-260 mm, and separating to obtain primary overflow and primary settled sand; inputting the primary overflow into a cyclone with a diameter phi of 130-180 mm of the accommodating cavity, and separating to obtain secondary overflow and secondary settled sand; and inputting the secondary overflow into a cyclone with a holding cavity diameter of phi 60-90 mm, and separating to obtain tertiary sand setting and tertiary overflow, wherein the tertiary overflow is the gravity sludge.
4. The zinc oxide flotation recovery method based on the combination of gravity flotation and preliminary desliming according to claim 1, wherein the specific preparation method of the Lp-1 reagent is as follows: firstly, mixing the oleic acid and the hydroximic acid in proportion, and uniformly stirring to obtain a brownish red liquid; adding the sodium hydroxide into the brownish red liquid, stirring until the sodium hydroxide becomes brown emulsion, and finally adding the pine oil, and uniformly stirring to obtain the Lp-1 reagent; the Lp-1 reagent is the flotation desliming agent and a zinc oxide collector in the flotation process of the zinc oxide in the step S5.
5. The zinc oxide flotation recovery method based on the combined heavy flotation and pre-desliming of claim 1, wherein in step S1, the mineral powder with the particle size of less than 0.074mm accounts for 60-75% of the total mass of the mineral powder, and the mineral powder with the particle size of less than 0.038mm accounts for 30-55% of the total mass of the mineral powder.
6. The zinc oxide flotation recovery method based on the combination of gravity flotation and pre-desliming according to claim 1, wherein in step S2, the zinc sulfide flotation process comprises one roughing process, two scavenging processes and two concentration processes, and finally the zinc sulfide concentrate and the zinc sulfide tailings are obtained.
7. The zinc oxide flotation recovery method based on the combination of gravity flotation and pre-desliming according to claim 1, wherein in step S5, the zinc oxide flotation process comprises two roughing, two scavenging and two concentrating processes, and finally the zinc oxide concentrate and the tailings are obtained.
8. The zinc oxide flotation recovery method based on combined heavy-float and pre-desliming according to claim 6, wherein the first predetermined agent comprises: 50-500 g/t of copper sulfate, 10-100 g/t of sodium butyl xanthate and 5-50 g/t of pinitol oil which are used as crude selection agents; 10-50 g/t of sodium butyl xanthate as a scavenging medicament; 100-500 g/t of water glass as a first zinc sulfide concentration agent.
9. The zinc oxide flotation recovery method based on combined heavy-float and pre-desliming according to claim 7, wherein the second predetermined agent comprises: 1000-5000 g/t of sodium carbonate, 1000-6000 g/t of water glass, 100-600 g/t of sodium hexametaphosphate, 1000-4000 g/t of sodium sulfide, 10-100 g/t of CA-1 medicament and 20-200 g/t of Lp-1 medicament as a first zinc oxide roughing medicament; 500-3000 g/t of water glass as a secondary zinc oxide roughing medicament, 50-300 g/t of sodium hexametaphosphate, 750-3000 g/t of sodium sulfide, 5-50 g/t of CA-1 medicament and 10-100 g/t of Lp-1 medicament; 500-2000 g/t of sodium sulfide, 5-50 g/t of CA-1 and 10-100 g/t of Lp-1 as first scavenging agents of zinc oxide; 100-1000 g/t of sodium sulfide, 5-50 g/t of CA-1 agent and 5-50 g/t of Lp-1 agent which are used as zinc oxide second scavenging agents; 100-1000 g/t of water glass, 10-100 g/t of sodium hexametaphosphate, 100-1000 g/t of sodium sulfide, 5-50 g/t of CA-1 medicament and 10-100 g/t of Lp-1 medicament which are used as zinc oxide first-time selection medicaments; the CA-1 medicament comprises the following components in percentage by mass: 2 to 5 percent of palmityl amine, 2 to 5 percent of acetic acid, 45 to 50 percent of water, 10 to 15 percent of hydroxyethyl cellulose and 30 to 35 percent of polyacrylic acid.
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