CN110743900A - Novel method for recovering carbon, copper and silver in zinc kiln slag - Google Patents
Novel method for recovering carbon, copper and silver in zinc kiln slag Download PDFInfo
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- CN110743900A CN110743900A CN201911035413.2A CN201911035413A CN110743900A CN 110743900 A CN110743900 A CN 110743900A CN 201911035413 A CN201911035413 A CN 201911035413A CN 110743900 A CN110743900 A CN 110743900A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
Abstract
The invention discloses a new method for recovering carbon, copper and silver in zinc kiln slag, which comprises the following steps: crushing zinc kiln slag, and performing wet grinding to obtain a flotation raw material; preparing the flotation raw material into pre-carbon flotation pulp, and then pre-carbon flotation in a flotation machine to obtain carbon concentrate and acid-washing raw material; carrying out acid washing treatment on the acid washing raw material to obtain copper-silver flotation raw ore pulp; and placing the copper-silver flotation raw ore pulp in a flotation machine for copper-silver mixed flotation to obtain copper-silver mixed concentrate and tailings. The invention adopts the processes of crushing, acid washing and flotation, comprehensively recovers the carbon concentrate and the copper-silver bulk concentrate from the zinc kiln slag, and realizes the purposes of effectively dissociating target mineral elements, changing the surface activity of minerals, reducing the consumption of medicaments and simplifying the process flow by combining the modes of ore grinding dissociation, acid washing treatment and flotation.
Description
Technical Field
The invention relates to the technical field of mineral processing engineering, in particular to a novel method for recovering carbon, copper and silver in zinc kiln slag.
Background
The zinc kiln slag is a kind of metallurgical waste slag, it is to mix 45% -55% coke into the dry leaching slag produced by zinc hydrometallurgy first and mix them evenly, then put it into the rotary kiln with the furnace temperature of 1100 deg.C-1300 deg.C to carry on the high temperature reduction roasting, the Pb, Zn, Cd and part of In and part of Ge In the leaching slag volatilize and enter the smoke and dust to be recovered, but the non-volatile FeCu, Ag, Au, Ga, most Ge and residual coke, SiO2About 90% of the impurities remain in the kiln slag. The zinc kiln slag contains more valuable elements and is a secondary resource with high recovery value, but the zinc kiln slag has large hardness, fine mineral embedded granularity, complex phase composition and difficult valuable element recovery, and is used as a metallurgical waste slag pile in a slag plant for a long time or is sold at low cost for paving or serving as a cement raw material, thereby occupying a large amount of land resources, causing resource waste and being easy to pollute the environment due to heavy metal leakage.
In the prior art, several methods are used for recovering zinc kiln slag, one of the methods is to recover part of coke and iron by adopting a winnowing and magnetic separation method, but zinc, copper and silver with higher values are not recovered; secondly, recycling carbon and silver in the zinc kiln slag by adopting a stage ore grinding-flotation method, but the recycling rate is low; thirdly, high-temperature smelting is adopted to recover iron, copper, lead and zinc in the zinc kiln slag, but silver and other rare and precious metals in the zinc kiln slag are not effectively recovered, and the method has larger energy consumption; and fourthly, the copper, zinc, indium, iron and arsenic in the zinc kiln slag are better recovered by adopting an acid leaching method, but residual carbon and valuable silver are not recovered, and the requirement of acid leaching on the corrosion resistance of equipment and the subsequent sewage treatment is higher.
Aiming at the defects of high valuable metal loss, low recovery rate, high energy consumption, difficult wastewater treatment and the like of the conventional zinc kiln slag recovery process, the novel zinc kiln slag treatment method which has the advantages of high recovery rate of valuable elements, low energy consumption, simple process flow and convenient subsequent treatment has practical significance.
Based on this, the prior art still remains to be improved.
Disclosure of Invention
In order to solve the technical problems, the embodiment of the invention provides a novel method for recovering carbon, copper and silver in zinc kiln slag, which has the advantages of high recovery rate of valuable elements, low energy consumption, simple process flow and convenient subsequent treatment.
The embodiment of the invention discloses a novel method for recovering carbon, copper and silver in zinc kiln slag, which comprises the following steps:
s1, crushing the zinc kiln slag, and performing wet grinding to obtain a flotation raw material;
s2, preparing the flotation raw material into pre-carbon flotation ore pulp, and pre-carbon flotation in a flotation machine to obtain carbon concentrate and acid washing raw material;
s3, carrying out acid washing treatment on the acid washing raw material to obtain copper-silver flotation raw ore pulp;
s4, carrying out copper-silver mixed flotation on the copper-silver flotation raw ore pulp in a flotation machine to obtain copper-silver mixed concentrate and tailings.
Further, in S1, crushing the zinc kiln slag until the granularity is-2 mm and accounts for 75-80%;
wet grinding includes: under the condition that the weight percentage concentration of the ore pulp is 65-70 wt%, wet grinding is carried out on the crushed zinc kiln slag until the granularity of-0.074 mm accounts for 80 wt%, and a flotation raw material is obtained.
Further, the preparation of the pre-floated carbon pulp comprises the following steps: and (3) blending the flotation raw materials into ore pulp with the weight percentage concentration of 25-30% to obtain pre-floating carbon ore pulp.
Further, the pre-float carbon may include primary carbon roughing and primary carbon concentrating, and specifically may include:
and S21 carbon roughing:
mixing and stirring the pre-floated carbon ore pulp, adding a first collecting agent, mixing and stirring, then adding a first foaming agent, mixing and stirring, and performing air-charging roughing to obtain carbon rough concentrate and floated carbon tailings;
and S22 carbon concentration:
stirring the carbon rough concentrate in a flotation machine and carrying out air-charging concentration to obtain carbon concentrate and carbon middling;
s23, mixing the carbon middling and the floating carbon tailings in a flotation machine to prepare acid-washed raw materials.
Further, the first collecting agent is kerosene, and the first foaming agent is pine oil.
Further, the acid washing treatment comprises:
s31, preparing the pickling raw material into pickling ore pulp;
s32, adjusting the pH value of the acid-washed ore pulp to 3.5-4.5, and stirring to obtain the copper-silver flotation raw ore pulp.
Further, the copper-silver mixed flotation comprises copper-silver roughing, copper-silver scavenging twice and copper-silver concentrating three times.
Further, the copper-silver roughing in the copper-silver mixed flotation comprises the following steps:
s411, preparing the copper-silver flotation raw ore pulp into copper-silver roughing ore pulp;
s412, adding a second collecting agent into the copper-silver roughing pulp, mixing and stirring, then adding a second foaming agent, mixing and stirring, and performing gas roughing to obtain copper-silver mixed rough concentrate and copper-silver roughing tailings.
Further, the copper-silver scavenging in the copper-silver mixed flotation comprises:
s421 first copper-silver scavenging: adding a third collecting agent into the copper-silver roughing tailings, stirring, adding a third foaming agent, mixing, stirring and carrying out air scavenging to obtain a fourth middling and first copper-silver scavenging tailings;
s422, second copper and silver scavenging: and adding a fourth collecting agent into the first copper-silver scavenged tailings, stirring, adding a fourth foaming agent, mixing, stirring and aerating for scavenging to obtain a fifth middling and second copper-silver scavenged tailings.
Further, the second collecting agent, the third collecting agent and the fourth collecting agent can be ammonium butoxide, and the second foaming agent, the third foaming agent and the fourth foaming agent can be selected from pine oil.
Further, the copper-silver concentration in the copper-silver mixed flotation comprises the following steps:
s431, first copper and silver concentration: mixing and stirring the copper-silver mixed rough concentrate in a flotation machine and carrying out air flotation concentration to obtain a third middling and a first copper-silver concentrated concentrate;
s432, second copper and silver concentration: mixing and stirring the first copper-silver concentrated concentrate in a flotation machine and carrying out air concentration to obtain a second middling and a second copper-silver concentrated concentrate;
s433, third copper and silver concentration: and mixing and stirring the second copper-silver concentrated concentrate in a flotation machine and carrying out air flotation concentration to obtain a first middling and copper-silver mixed concentrate.
Further, in the copper-silver mixed flotation, returning the first middling to the second copper-silver concentration operation; returning the second middlings to the first copper-silver concentration operation; returning the third middling and the fourth middling to the copper-silver roughing operation simultaneously; and returning the fifth middling to the first copper-silver scavenging operation.
By adopting the technical scheme, the invention at least has the following beneficial effects:
the invention adopts the processes of crushing, acid washing and flotation, comprehensively recovers the carbon concentrate and the copper-silver bulk concentrate from the zinc kiln slag, and realizes the purposes of effectively dissociating target mineral elements, changing the surface activity of minerals, reducing the consumption of medicaments and simplifying the process flow by combining the modes of ore grinding dissociation, acid washing pretreatment and flotation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
As shown in FIG. 1, the embodiment of the invention discloses a new method for recovering carbon, copper and silver in zinc kiln slag, which comprises the following steps:
s1, crushing the zinc kiln slag until the granularity is-2 mm and accounts for 75-80%, and then carrying out wet grinding to obtain a flotation raw material; wherein, wet grinding includes: under the condition that the weight percentage concentration of the ore pulp is 65-70 wt%, wet grinding is carried out on the crushed zinc kiln slag until the granularity of-0.074 mm accounts for 80 wt%, and a flotation raw material is obtained.
S2, blending the flotation raw materials into ore pulp with the weight percentage concentration of 25-30 wt% to obtain pre-carbon flotation ore pulp, and pre-carbon flotation in a flotation machine to obtain carbon concentrate and acid washing raw materials;
the pre-float carbon comprises primary carbon roughing and primary carbon concentrating:
s21, when the carbon roughing is performed, placing the pre-floated carbon pulp in a flotation machine with the rotation speed of 1600-1800 rad/min, stirring for 1min, adding 2800-3200 g/t of collecting agent kerosene, mixing and stirring for 3min, adding 325-375 g/t of foaming agent pine oil, mixing and stirring for 1min, and re-aerating and roughing for 5min to obtain carbon roughing concentrate and floated carbon tailings;
s22, when the carbon concentration is performed, the carbon rough concentrate is placed in a flotation machine with the rotating speed of 2200-2400 rad/min to be stirred for 1min, then gas is refilled for concentration for 3.5min, and carbon concentrate and carbon middling are obtained;
s23, the carbon middling and the floating carbon tailings are placed in a flotation machine to be mixed to prepare acid-washed raw materials.
S3, carrying out acid washing treatment on the acid washing raw material to obtain copper-silver flotation raw ore pulp;
the pickling treatment comprises the following steps:
s31, adjusting the pickling raw material to an ore pulp concentration of 30-35 wt% to obtain a pickled ore pulp;
s32, placing the acid-washed ore pulp in a flotation machine with the rotating speed of 1600-1800 rad/min, stirring for 5-6 min, and adjusting the pH value of the ore pulp to 3.5-4.5 by using sulfuric acid in the stirring process to obtain copper-silver flotation raw ore pulp.
S4, placing the copper-silver flotation raw ore pulp in a flotation machine for copper-silver mixed flotation to obtain copper-silver mixed concentrate, and obtaining copper-silver concentrate and tailings.
The copper-silver roughing in the copper-silver mixed flotation comprises the following steps:
s411, adjusting the concentration of the raw ore pulp of the copper-silver mixed flotation to 25-30 wt% to obtain copper-silver rougher ore pulp;
s412, placing the copper-silver roughing pulp in a flotation machine at the rotating speed of 1600-1800 rad/min, stirring for 1min, adding 325-375 g/t of collecting agent ammonium butyrate black powder, mixing and stirring for 3min, adding 125-175 g/t of foaming agent terpineol oil, mixing and stirring for 1min, and then conducting gas recharging and roughing for 6min to obtain copper-silver mixed rough concentrate and copper-silver roughing tailings;
the copper-silver scavenging in the copper-silver mixed flotation comprises the following steps:
s421 first copper-silver scavenging: adding 125-175 g/t of collecting agent ammonium butyl black in the copper-silver roughing tailings in a flotation machine with the rotating speed of 1600-1800 rad/min, mixing and stirring for 3min, adding 55-65 g/t of foaming agent pine oil, mixing and stirring for 1min, and then performing scavenging for 4min to obtain fourth middlings and first copper-silver scavenging tailings;
s422, second copper and silver scavenging: adding 40-60 g/t of collecting agent ammonium butyl black agent into the first copper-silver scavenged tailings in a flotation machine with the rotating speed of 1600-1800 rad/min, mixing and stirring for 3min, adding 15-25 g/t of foaming agent pine oil, mixing and stirring for 1min, and then performing scavenging for 3min again to obtain fifth middling and second copper-silver scavenged tailings;
the copper and silver concentration in the copper and silver flotation comprises the following steps:
s431, first copper and silver concentration: placing the copper-silver mixed rough concentrate into a flotation machine with the rotation speed of 2200-2400 rad/min, mixing and stirring for 1min, and then carrying out air concentration for 3min to obtain a third middling and a first copper-silver concentrated concentrate;
s432, second copper and silver concentration: placing the first copper-silver concentrated concentrate into a flotation machine with the rotating speed of 2200-2400 rad/min, mixing and stirring for 1min, and then carrying out air concentration for 3min to obtain a second middling and a second copper-silver concentrated concentrate;
s433, third copper and silver concentration: and placing the second copper-silver concentrated concentrate into a flotation machine with the rotating speed of 2200-2400 rad/min, mixing and stirring for 1min, and then carrying out air concentration for 3min to obtain a first middling and copper-silver mixed concentrate.
Preferably, middlings in the copper-silver mixed flotation are returned to the front-end operation in the following sequence to form a flotation closed cycle: returning the first middling to the second copper-silver concentration operation; returning the second middlings to the first copper-silver concentration operation; returning the third middling and the fourth middling to the copper-silver roughing operation simultaneously; and returning the fifth middling to the first copper-silver scavenging operation.
Example 1
The zinc kiln slag raw material comprises the following main chemical components in percentage by weight: 1.88 wt% of Zn, 1.17 wt% of Cu, 31.57 wt% of TFe, 5.30 wt% of S, 17.39wt% of total C, 0.25 wt% of Pb and 298.30g/t of Ag; crushing raw material zinc kiln slag until the particle size of-2 mm accounts for 75-80%, and grinding the ore pulp by a wet method under the condition that the weight percentage concentration of the ore pulp is 65-70 wt% until the particle size of-0.074 mm accounts for 80 wt%, thereby obtaining a flotation raw material; placing the flotation raw materials into a flotation machine for pre-carbon flotation, wherein the concentration of flotation pulp is 25-30 wt%, the flotation stirring rotating speed is 1700rad/min, and the flotation comprises the following specific steps: firstly stirring ore pulp for 1min in the carbon flotation process, adding 3000g/t of collecting agent kerosene, mixing and stirring for 3min, adding 350g/t of foaming agent terpineol, mixing and stirring for 1min, then, inflating, scraping and roughing for 5min to finish pre-floating carbon to obtain carbon rough concentrate and floating carbon tailings, then, placing the carbon rough concentrate in a flotation machine with the rotation speed of 2300rad/min, mixing and stirring for 1min, and then, inflating and finely selecting for 3.5min to obtain carbon concentrate and carbon middling; the method comprises the following specific steps of mixing the float carbon tailings and the carbon middling, and then carrying out acid pickling treatment: firstly, mixing the float carbon tailings and the carbon middling, adjusting the concentration of the ore pulp to 30-35 wt%, then placing the ore pulp in a flotation machine with the rotation speed of 1700rad/min for stirring for 5.5min, and adjusting the pH value of the ore pulp to 4 by using sulfuric acid in the stirring process to obtain copper-silver flotation raw ore pulp; after the concentration of the copper-silver flotation raw ore pulp is adjusted to 25-30 wt%, copper-silver mixed flotation is carried out in a flotation machine, and the specific operation steps of the flotation are as follows: when copper and silver roughing is carried out, adjusting the concentration of copper and silver flotation raw ore pulp to 25-30 wt%, then placing the pulp in a flotation machine with the rotation speed of 1700rad/min, firstly stirring for 1min, adding 350g/t collecting agent ammonium nitrate black powder, mixing and stirring for 3min, adding 150g/t foaming agent terpineol oil, mixing and stirring for 1min, and re-aerating and roughing for 6min to obtain copper and silver mixed rough concentrate; when copper and silver scavenging I is carried out, firstly adding 150g/t of collecting agent ammonium butyl black agent into copper and silver roughing tailings in a flotation machine, mixing and stirring for 3min, then adding 60g/t of foaming agent pine oil, mixing and stirring for 1min, and carrying out air scavenging for 4min to obtain fourth middling; when copper and silver scavenging II is carried out, firstly adding 50g/t of collecting agent butyl ammonium black into copper and silver scavenging I tailings in a flotation machine, mixing and stirring for 3min, adding 20g/t of foaming agent pine oil, mixing and stirring for 1min, and carrying out air scavenging for 3min to obtain fourth middling and tailings; when copper and silver concentration I is carried out, the copper and silver mixed rough concentrate is placed in a flotation machine with the rotation speed of 2300rad/min to be mixed and stirred for 1min, and then air concentration is carried out for 3min, so that a third middling and copper and silver concentrated concentrate I are obtained; when copper and silver concentration II is carried out, the copper and silver mixed rough concentrate is placed in a flotation machine with the rotation speed of 2300rad/min for mixing and stirring for 1min, and then air concentration is carried out for 3min, so as to obtain a second middling and copper and silver concentration II concentrate; when copper-silver concentration III is carried out, the copper-silver mixed rough concentrate is placed in a flotation machine with the rotation speed of 2300rad/min for mixing and stirring for 1min, and then air concentration is carried out for 3min, so as to obtain a first middling and copper-silver mixed concentrate; in the flotation process, the obtained first middling is returned to the copper-silver concentration II operation, the second middling is returned to the copper-silver concentration I operation, the third middling and the fourth middling are simultaneously returned to the copper-silver roughing operation, and the fifth middling is returned to the copper-silver scavenging I operation, so that a flotation closed cycle is formed. The grade of C in the obtained carbon concentrate is 77.60%, and the recovery rate of C is 92.64%; the grades of Cu and Ag in the copper and silver bulk concentrate are respectively 5.31 percent and 1425.80g/t, and the recovery rates of Cu and Ag are respectively 80.38 percent and 85.30 percent.
Example 2
The zinc kiln slag raw material comprises the following main chemical components in percentage by weight: 1.83 wt% of Zn, 1.14wt% of Cu1.14wt%, 31.09wt% of TFeS, 5.28 wt% of S, 18.98wt% of total C, 0.23 wt% of Pb and 286.12g/t of Ag; crushing raw material zinc kiln slag until the particle size of-2 mm accounts for 75-80%, and grinding the ore pulp by a wet method under the condition that the weight percentage concentration of the ore pulp is 65-70 wt% until the particle size of-0.074 mm accounts for 80 wt%, thereby obtaining a flotation raw material; placing the flotation raw material into a flotation machine for pre-carbon flotation, wherein the concentration of flotation pulp is 25-30 wt%, the flotation stirring speed is 1600rad/min, and the flotation comprises the following specific steps: firstly stirring ore pulp for 1min in the carbon flotation process, adding 3200g/t of collecting agent kerosene, mixing and stirring for 3min, adding 325g/t of foaming agent terpineol, mixing and stirring for 1min, then, inflating, scraping and roughing for 5min to finish pre-floating carbon to obtain carbon rough concentrate and floating carbon tailings, then, placing the carbon rough concentrate in a flotation machine with the rotating speed of 2200rad/min, mixing and stirring for 1min, and then, inflating and finely selecting for 3.5min to obtain carbon concentrate and carbon middling; the method comprises the following specific steps of mixing the float carbon tailings and the carbon middling, and then carrying out acid pickling treatment: firstly, mixing the float carbon tailings and the carbon middling, adjusting the concentration of the ore pulp to 30-35 wt%, then placing the ore pulp in a flotation machine with the rotation speed of 1600rad/min for stirring for 6min, and adjusting the pH value of the ore pulp to 4.5 by using sulfuric acid in the stirring process to obtain copper-silver flotation raw ore pulp; after the concentration of the copper-silver flotation raw ore pulp is adjusted to 25-30 wt%, copper-silver mixed flotation is carried out in a flotation machine, and the specific operation steps of the flotation are as follows: when copper and silver roughing is carried out, adjusting the concentration of copper and silver flotation raw ore pulp to 25-30 wt%, then placing the pulp in a flotation machine with the rotation speed of 1600rad/min, firstly stirring for 1min, adding a collecting agent ammonium nitrate black drug for 325g/t, mixing and stirring for 3min, adding a foaming agent terpineol oil for 175g/t, mixing and stirring for 1min, and re-aerating and roughing for 6min to obtain copper and silver mixed rough concentrate; when copper and silver scavenging I is carried out, firstly, 125g/t of collecting agent butylammonium black powder is added into the copper and silver roughing tailings in a flotation machine, mixing and stirring are carried out for 3min, then 65g/t of foaming agent terpineol oil is added, mixing and stirring are carried out for 1min, and air scavenging is carried out for 4min, so as to obtain a fourth middling; when copper and silver scavenging II is carried out, firstly adding 45g/t of collecting agent butyl ammonium black into copper and silver scavenging I tailings in a flotation machine, mixing and stirring for 3min, adding 25g/t of foaming agent pine oil, mixing and stirring for 1min, and carrying out air scavenging for 3min to obtain fourth middling and tailings; when copper and silver concentration I is carried out, the copper and silver mixed rough concentrate is placed in a flotation machine with the rotating speed of 2200rad/min to be mixed and stirred for 1min, and then air concentration is carried out for 3min, so that a third middling and copper and silver concentrated concentrate I are obtained; when copper and silver concentration II is carried out, the copper and silver mixed rough concentrate is placed in a flotation machine with the rotating speed of 2200rad/min to be mixed and stirred for 1min, and then air concentration is carried out for 3min, so that second middling and copper and silver concentrated II concentrate are obtained; when copper-silver concentration III is carried out, the copper-silver mixed rough concentrate is placed in a flotation machine with the rotating speed of 2200rad/min to be mixed and stirred for 1min, and then air concentration is carried out for 3min, so that a first middling and copper-silver mixed concentrate is obtained; in the flotation process, the obtained first middling is returned to the copper-silver concentration II operation, the second middling is returned to the copper-silver concentration I operation, the third middling and the fourth middling are simultaneously returned to the copper-silver roughing operation, and the fifth middling is returned to the copper-silver scavenging I operation, so that a flotation closed cycle is formed. The grade of C in the obtained carbon concentrate is 75.95%, and the recovery rate of C is 93.41%; the grades of Cu and Ag in the copper and silver bulk concentrate are respectively 5.26 percent and 1398.80g/t, and the recovery rates of Cu and Ag are respectively 81.13 percent and 85.91 percent.
Example 3
The zinc kiln slag raw material comprises the following main chemical components in percentage by weight: 1.95 wt% of Zn, 1.21wt% of Cu1.21wt%, 30.31wt% of TFeS, 5.41 wt% of S, 16.26wt% of total C, 0.26 wt% of Pb and 303.28g/t of Ag; crushing raw material zinc kiln slag until the particle size of-2 mm accounts for 75-80%, and grinding the ore pulp by a wet method under the condition that the weight percentage concentration of the ore pulp is 65-70 wt% until the particle size of-0.074 mm accounts for 80 wt%, thereby obtaining a flotation raw material; placing the flotation raw material into a flotation machine for pre-floating carbon, wherein the concentration of flotation pulp is 25-30 wt%, the flotation stirring speed is 1800rad/min, and the flotation comprises the following specific steps: firstly stirring the ore pulp for 1min in the carbon flotation process, adding collecting agent kerosene 2800g/t, mixing and stirring for 3min, adding foaming agent terpineol 375g/t, mixing and stirring for 1min, then, inflating, scraping and roughing for 5min to finish pre-floating carbon to obtain carbon rough concentrate and floating carbon tailings, then, placing the carbon rough concentrate in a flotation machine with the rotating speed of 2400rad/min, mixing and stirring for 1min, and then, inflating and finely selecting for 3.5min to obtain carbon concentrate and carbon middling; the method comprises the following specific steps of mixing the float carbon tailings and the carbon middling, and then carrying out acid pickling treatment: firstly, mixing the float carbon tailings and the carbon middling, adjusting the concentration of the ore pulp to 30-35 wt%, then placing the ore pulp in a flotation machine with the rotation speed of 1800rad/min for stirring for 5min, and adjusting the pH value of the ore pulp to 3.5 by using sulfuric acid in the stirring process to obtain copper-silver flotation raw ore pulp; after the concentration of the copper-silver flotation raw ore pulp is adjusted to 25-30 wt%, copper-silver mixed flotation is carried out in a flotation machine, and the specific operation steps of the flotation are as follows: when copper and silver roughing is carried out, adjusting the concentration of copper and silver flotation raw ore pulp to 25-30 wt%, then placing the pulp in a flotation machine with the rotation speed of 1800rad/min, firstly stirring for 1min, adding 375g/t collecting agent ammonium nitrate black powder, mixing and stirring for 3min, adding 125g/t foaming agent terpineol oil, mixing and stirring for 1min, and re-aerating and roughing for 6min to obtain copper and silver mixed rough concentrate; when copper and silver scavenging I is carried out, 175g/t of collecting agent ammonium butyrate black powder is added into copper and silver roughing tailings in a flotation machine, mixing and stirring are carried out for 3min, 55g/t of foaming agent terpineol oil is added, mixing and stirring are carried out for 1min, and air scavenging is carried out for 4min, so that fourth middling is obtained; when copper and silver scavenging II is carried out, 55g/t of collecting agent ammonium butyrate black pigment is firstly added into the copper and silver scavenging I tailings in the flotation machine, the mixture is stirred for 3min, 15g/t of foaming agent pine oil is added, the mixture is stirred for 1min, and air scavenging is carried out for 3min to obtain fourth middling and tailings; when copper and silver concentration I is carried out, putting the copper and silver mixed rough concentrate into a flotation machine with the rotating speed of 2400rad/min, mixing and stirring for 1min, and then carrying out air concentration for 3min to obtain a third middling and copper and silver concentrated concentrate I; when copper and silver concentration II is carried out, putting the copper and silver mixed rough concentrate into a flotation machine with the rotating speed of 2400rad/min, mixing and stirring for 1min, and then carrying out air concentration for 3min to obtain a second middling and copper and silver concentrated II concentrate; when copper-silver concentration III is carried out, placing the copper-silver mixed rough concentrate into a flotation machine with the rotating speed of 2400rad/min, mixing and stirring for 1min, and then carrying out gas concentration for 3min to obtain a first middling and copper-silver mixed concentrate; in the flotation process, the obtained first middling is returned to the copper-silver concentration II operation, the second middling is returned to the copper-silver concentration I operation, the third middling and the fourth middling are simultaneously returned to the copper-silver roughing operation, and the fifth middling is returned to the copper-silver scavenging I operation, so that a flotation closed cycle is formed. The grade of C in the obtained carbon concentrate is 76.76%, and the recovery rate of C is 92.19%; the grades of Cu and Ag in the copper and silver bulk concentrate are respectively 5.32 percent and 1435.75g/t, and the recovery rates of Cu and Ag are respectively 81.47 percent and 86.10 percent.
In summary, the method disclosed in the embodiment of the present invention has the following advantages:
1) the raw material adaptability is strong, and pretreatment is not needed;
2) the coke is subjected to preferential flotation recovery, so that the dosage of reagents for acid washing and subsequent flotation can be greatly reduced, and the reagent cost is saved;
3) before copper and silver flotation, the zinc kiln slag is subjected to acid washing treatment by using sulfuric acid, so that the mineral surface is cleaned, the flotation performance of the minerals is improved, the quality of concentrate products is improved and the like.
4) According to the invention, the zinc kiln slag is treated by adopting the technologies of crushing, acid washing and flotation, so that high-grade and high-recovery carbon concentrate and copper-silver bulk concentrate can be obtained; the flotation tailings are rich in a large amount of elements such as silicon, calcium and the like, and are good cement materials; the flotation tailing filtered water can be recycled. The method has the advantages of simple process flow, low energy consumption, low drug consumption, low requirement on equipment, easy industrial production, and low pressure on recycling and environmental protection of the generated wastewater. It should be particularly noted that the various components or steps in the above embodiments can be mutually intersected, replaced, added or deleted, and therefore, the combination formed by the reasonable permutation and combination conversion shall also belong to the protection scope of the present invention, and the protection scope of the present invention shall not be limited to the embodiments.
The above is an exemplary embodiment of the present disclosure, and the order of disclosure of the above embodiment of the present disclosure is only for description and does not represent the merits of the embodiment. It should be noted that the discussion of any embodiment above is exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to those examples, and that various changes and modifications may be made without departing from the scope, as defined in the claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. A new method for recovering carbon, copper and silver in zinc kiln slag is characterized by comprising the following steps:
s1, crushing the zinc kiln slag, and performing wet grinding to obtain a flotation raw material;
s2, preparing the flotation raw material into pre-carbon flotation ore pulp, and pre-carbon flotation in a flotation machine to obtain carbon concentrate and acid washing raw material;
s3, carrying out acid washing treatment on the acid washing raw material to obtain copper-silver flotation raw ore pulp;
s4, carrying out copper-silver mixed flotation on the copper-silver flotation raw ore pulp in a flotation machine to obtain copper-silver mixed concentrate and tailings.
2. The method of claim 1, wherein in S1, the zinc kiln slag is crushed to a particle size of-2 mm accounting for 75-80%;
wet grinding includes: under the condition that the weight percentage concentration of the ore pulp is 65-70 wt%, wet grinding is carried out on the crushed zinc kiln slag until the granularity of-0.074 mm accounts for 80 wt%, and a flotation raw material is obtained.
3. The method of claim 1, wherein the pre-float-carbon comprises:
and S21 carbon roughing:
mixing and stirring the pre-floated carbon ore pulp, adding first collecting agent kerosene, mixing and stirring, then adding first foaming agent pinitol oil, mixing and stirring, and performing gas-charging roughing to obtain carbon rough concentrate and floated carbon tailings;
and S22 carbon concentration:
stirring the carbon rough concentrate in a flotation machine and carrying out air-charging concentration to obtain carbon concentrate and carbon middling;
s23, mixing the carbon middling and the floating carbon tailings in a flotation machine to prepare acid-washed raw materials.
4. The method of claim 1, wherein the acid wash treatment comprises:
s31, preparing the pickling raw material into pickling ore pulp;
s32, adjusting the pH value of the acid-washed ore pulp to 3.5-4.5, and stirring to obtain the copper-silver flotation raw ore pulp.
5. The method of claim 1, wherein the copper-silver bulk flotation comprises one copper-silver roughing, two copper-silver scavenging and three copper-silver concentrating.
6. The method according to claim 5, wherein the copper-silver roughing in the copper-silver mixed flotation comprises:
s411, preparing the copper-silver flotation raw ore pulp into copper-silver roughing ore pulp;
s412, adding a collecting agent ammonium nitrate black powder into the copper-silver roughing pulp, mixing and stirring, then adding a foaming agent terpineol oil, mixing and stirring, and performing gas-charging roughing to obtain copper-silver mixed rough concentrate and copper-silver roughing tailings.
7. The method of claim 6, wherein the copper-silver scavenging in the copper-silver hybrid flotation comprises:
s421 first copper-silver scavenging: adding a collecting agent ammonium nitrate black powder into the copper-silver roughing tailings, stirring, adding foaming agent pine alcohol oil, mixing, stirring and carrying out air scavenging to obtain fourth middlings and first copper-silver scavenging tailings;
s422, second copper and silver scavenging: and adding a collecting agent ammonium nitrate black powder into the first copper-silver scavenged tailings, stirring, adding a foaming agent terpineol oil, mixing, stirring and carrying out air scavenging to obtain fifth middling and second copper-silver scavenged tailings.
8. The method of claim 5, wherein the copper-silver beneficiation in the copper-silver hybrid flotation comprises:
s431, first copper and silver concentration: mixing and stirring the copper-silver mixed rough concentrate in a flotation machine and carrying out air flotation concentration to obtain a third middling and a first copper-silver concentrated concentrate;
s432, second copper and silver concentration: mixing and stirring the first copper-silver concentrated concentrate in a flotation machine and carrying out air concentration to obtain a second middling and a second copper-silver concentrated concentrate;
s433, third copper and silver concentration: and mixing and stirring the second copper-silver concentrated concentrate in a flotation machine and carrying out air flotation concentration to obtain a first middling and copper-silver mixed concentrate.
9. The method of claim 7, wherein the copper-silver beneficiation in the copper-silver hybrid flotation comprises:
s431, first copper and silver concentration: mixing and stirring the copper-silver mixed rough concentrate in a flotation machine and carrying out air flotation concentration to obtain a third middling and a first copper-silver concentrated concentrate;
s432, second copper and silver concentration: mixing and stirring the first copper-silver concentrated concentrate in a flotation machine and carrying out air concentration to obtain a second middling and a second copper-silver concentrated concentrate;
s433, third copper and silver concentration: and mixing and stirring the second copper-silver concentrated concentrate in a flotation machine and carrying out air flotation concentration to obtain a first middling and copper-silver mixed concentrate.
10. The method according to claim 9, wherein in the copper-silver mixed flotation, the first middling is returned to the second copper-silver concentration operation; returning the second middlings to the first copper-silver concentration operation; returning the third middling and the fourth middling to the copper-silver roughing operation simultaneously; and returning the fifth middling to the first copper-silver scavenging operation.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111921700A (en) * | 2020-07-13 | 2020-11-13 | 黑龙江科技大学 | Method for comprehensively recovering multiple metals in copper smelting slag |
| CN111957660A (en) * | 2020-08-17 | 2020-11-20 | 陈妹儿 | Centralized recovery processing method for ceramic insulators |
| CN112371353A (en) * | 2020-10-22 | 2021-02-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for treating and recovering zinc kiln slag |
| CN112517223A (en) * | 2020-10-27 | 2021-03-19 | 西北矿冶研究院 | Enrichment method of low-quality copper-zinc bulk concentrate |
| CN112619881A (en) * | 2020-11-10 | 2021-04-09 | 西北矿冶研究院 | Copper-lead-zinc-sulfur bulk concentrate sorting method |
| CN112619879A (en) * | 2020-11-10 | 2021-04-09 | 西北矿冶研究院 | Copper-lead-zinc mixed ore pulp sorting process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5845339A (en) * | 1981-09-14 | 1983-03-16 | Toho Aen Kk | Treatment of zinc leached slag and secondarily leached residues from said slag |
| US6319389B1 (en) * | 1999-11-24 | 2001-11-20 | Hydromet Systems, L.L.C. | Recovery of copper values from copper ores |
| CN102218369A (en) * | 2011-04-13 | 2011-10-19 | 济源市东方化工有限责任公司 | Production method of selecting copper from slag after selecting carbon from slag in rotary kiln in zinc industry |
| CN103736595A (en) * | 2013-12-30 | 2014-04-23 | 河南豫光锌业有限公司 | Method for improving grade of silver concentrate recovered through zinc leaching residue flotation |
| CN107790293A (en) * | 2017-10-26 | 2018-03-13 | 尤灵革 | A kind of zinc kiln slag comprehensive recycling process |
| CN108393197A (en) * | 2018-03-12 | 2018-08-14 | 湖南水口山有色金属集团有限公司 | A kind of beneficiation method recycling iron, carbon, silver from zinc leaching residue |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120293630A1 (en) * | 2011-05-19 | 2012-11-22 | Qualcomm Incorporated | Method and apparatus for multi-camera motion capture enhancement using proximity sensors |
-
2019
- 2019-10-29 CN CN201911035413.2A patent/CN110743900B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5845339A (en) * | 1981-09-14 | 1983-03-16 | Toho Aen Kk | Treatment of zinc leached slag and secondarily leached residues from said slag |
| US6319389B1 (en) * | 1999-11-24 | 2001-11-20 | Hydromet Systems, L.L.C. | Recovery of copper values from copper ores |
| CN102218369A (en) * | 2011-04-13 | 2011-10-19 | 济源市东方化工有限责任公司 | Production method of selecting copper from slag after selecting carbon from slag in rotary kiln in zinc industry |
| CN103736595A (en) * | 2013-12-30 | 2014-04-23 | 河南豫光锌业有限公司 | Method for improving grade of silver concentrate recovered through zinc leaching residue flotation |
| CN107790293A (en) * | 2017-10-26 | 2018-03-13 | 尤灵革 | A kind of zinc kiln slag comprehensive recycling process |
| CN108393197A (en) * | 2018-03-12 | 2018-08-14 | 湖南水口山有色金属集团有限公司 | A kind of beneficiation method recycling iron, carbon, silver from zinc leaching residue |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111921700A (en) * | 2020-07-13 | 2020-11-13 | 黑龙江科技大学 | Method for comprehensively recovering multiple metals in copper smelting slag |
| CN111957660A (en) * | 2020-08-17 | 2020-11-20 | 陈妹儿 | Centralized recovery processing method for ceramic insulators |
| CN111957660B (en) * | 2020-08-17 | 2021-12-03 | 国网江苏省电力有限公司常州供电分公司 | Centralized recovery processing method for ceramic insulators |
| CN112371353A (en) * | 2020-10-22 | 2021-02-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for treating and recovering zinc kiln slag |
| CN112517223A (en) * | 2020-10-27 | 2021-03-19 | 西北矿冶研究院 | Enrichment method of low-quality copper-zinc bulk concentrate |
| CN112517223B (en) * | 2020-10-27 | 2022-11-08 | 西北矿冶研究院 | Enrichment method of low-quality copper-zinc bulk concentrate |
| CN112619881A (en) * | 2020-11-10 | 2021-04-09 | 西北矿冶研究院 | Copper-lead-zinc-sulfur bulk concentrate sorting method |
| CN112619879A (en) * | 2020-11-10 | 2021-04-09 | 西北矿冶研究院 | Copper-lead-zinc mixed ore pulp sorting process |
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