CN115814959A - Inhibitor applied to lead flotation of lead-zinc ore and application thereof - Google Patents
Inhibitor applied to lead flotation of lead-zinc ore and application thereof Download PDFInfo
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Abstract
The invention provides an inhibitor applied to lead flotation of lead-zinc ores and application thereof, which utilizes the mutual synergistic action of an inorganic inhibitor and an organic inhibitor to form a metal chelate with a plurality of metal ions under the conditions of proper proportion and pH value so as to eliminate Ca which is an unavoidable ion in ore pulp 2+ 、Mg 2+ Etc., selectively enhance the effect on Zn 2+ 、Fe 2+ And Fe 3+ And the like, and finally achieves the effect of inhibiting the pyrite and the sphalerite. The zinc and the sulfur are efficiently inhibited in the lead flotation, and the purposes of reducing the content of the zinc and the sulfur in lead concentrate and improving the lead recovery rate are achieved. The whole process of the process does not add strong acid and strong alkali, and the cost of the beneficiation reagent is greatly reducedThe social benefit and the economic benefit are obvious.
Description
Technical Field
The invention relates to an inhibitor adopted in lead flotation in the field of mineral processing and a using method thereof.
Background
Lead and zinc are important nonferrous metal ores in China, the application range of the lead is wide, lead is widely applied to the electrical industry, the mechanical industry, the military industry and the like, and particularly, a large amount of lead metal is needed when lead-acid batteries are used in a large amount due to the development of new energy at present. Because zinc metal has excellent properties such as good drawability, wear resistance and corrosion resistance, zinc can be made into an alloy with more excellent physical and chemical properties with various metals, and the zinc alloy is an important nonferrous metal ore.
In the lead flotation, lime and zinc sulfate are usually added to inhibit zinc and sulfur in raw ore pulp, and are relatively common zinc and sulfur inhibitors.
The use of a large amount of lime can cause scaling corrosion of equipment, increase the maintenance cost of the equipment and cause serious pollution to the environment. The use of a large amount of zinc sulfate can cause strong inhibition of zinc, and in zinc flotation operation, the dosage of an activating agent needs to be increased, so that the zinc recovery rate is not improved, and the dosage of a medicament and the cost of the medicament are increased.
Background example 1, patent of invention: a mineral separation process of zinc mineral in low-grade lead-zinc sulfide ore and an inhibitor thereof are disclosed, and the application numbers are as follows: CN202110325788.3 discloses a beneficiation process of zinc minerals in low-grade lead-zinc sulfide ores and an inhibitor thereof, wherein the inhibitor comprises the following components in percentage by weight: 30-45% of zinc sulfate, 30-45% of sodium sulfite, 10-25% of sodium humate and 10-25% of sodium sulfide, and then the composition XKY-07 is used as an inhibitor to participate in the flotation operation of lead minerals. But the use process still needs lime for sulfur suppression.
Background example 2, patent of invention: a combined inhibitor for flotation separation of lead-zinc sulfide ores and application thereof are disclosed in the application numbers: CN202110920882.3 discloses a combined inhibitor for flotation separation of lead-zinc sulfide ores and application thereof, wherein the combined inhibitor comprises zinc sulfate and iminodisuccinic acid; the combined inhibitor is used as an inhibitor of sphalerite for flotation separation of galena and sphalerite. But the use process still needs to add lime for sulfur suppression.
Background example 3, patent of invention: a flotation separation method of refractory lead-zinc sulfide ore and a zinc blende inhibitor thereof have the following application numbers: CN202111260509.6 discloses a flotation separation method of refractory lead-zinc sulfide ore and a zinc blende inhibitor thereof, and calcium hypochlorite and sodium carbonate are combined to form the novel zinc blende inhibitor. Wherein cyanide is used, which is not friendly to the environment.
Disclosure of Invention
The invention aims to produce a zinc-sulfur inhibitor applied to lead flotation in lead-zinc ores, which is compounded by adopting an inorganic inhibitor and an organic inhibitor, has no toxicity, no harm, small using amount and good effect, and can replace the conventional lime and zinc sulfate. The zinc and the sulfur are efficiently inhibited in the lead flotation, and the aims of reducing the content of the zinc and the sulfur in lead concentrate and improving the lead recovery rate are fulfilled.
The principle of the invention is as follows:
the invention produces an efficient and environment-friendly combined inhibitor applied to lead flotation of zinc and sulfur in lead-zinc ores, and the principle is that the conventional lime and zinc sulfate are replaced by utilizing the mutual synergistic effect of an inorganic inhibitor and an organic inhibitor. The inorganic inhibitor sodium carbonate in the combined inhibitor is hydrolyzed in ore pulp to obtain OH - 、HCO 3- 、CO 3 2- Plasma capable of eliminating inevitable ions Ca in water 2+ 、Mg 2+ And the like. Sodium carbonate in combination with zinc sulfate has hydrophilic Zn (OH) deposited on the surfaces of zincblende and pyrite 2 Colloidal particles, with hydrophilic Zn (CO) 3 )(OH) 6 The colloidal particles cover the surfaces of the sphalerite and the pyrite, and enhance the surface hydrophilicity of the sphalerite and the pyrite to inhibit the sphalerite and the pyrite. Sodium sulfite is an effective inhibitor for sphalerite and pyrite, has weak inhibiting ability on galena, and can enhance the inhibiting ability on the sphalerite and pyrite when the dosage is proper. The bleaching powder has strong oxidation property, plays a role in inhibiting reduction reaction on the surface of minerals, and ensures that the sphalerite and the pyrite keep hydrophilic property and are not activated by the action of copper ions and the like. The organic inhibitor humate and lignosulfonate have more aromatic structures and functional groups, and can form metal chelate with various metal ions under the conditions of proper proportion and pH valueThe compound is utilized in the invention and Zn in the pH value range of 6-9 2+ 、Fe 2+ And Fe 3+ And the like, to enhance the hydrophilicity of the sphalerite and pyrite, and to selectively enhance the inhibition of sphalerite and pyrite. Novel efficient collecting agent P 1 The collecting capacity and selectivity of the galena are good, the combined inhibition is applied to lead flotation, and the zinc and sulfur are further inhibited efficiently, so that the aims of reducing the content of the zinc and sulfur in lead concentrate and improving the lead recovery rate are fulfilled.
The invention is realized by the following technical scheme:
inhibitor and inhibitor Ts applied to lead flotation in lead-zinc ores 2 Calculated by weight percentage, comprises: 20-30% of sodium carbonate, 1-5% of humate, 1-5% of lignosulfonate, 1-5% of bleaching powder, 10-20% of sodium sulfite and 50-60% of zinc sulfate.
A beneficiation method applied to a lead flotation inhibitor of lead-zinc ores comprises the following steps:
i. grinding: grinding the raw ore to obtain raw ore pulp;
lead flotation: addition of inhibitor Ts to raw ore pulp 2 Post-stirring and adding lead collecting agent P 1 Lead roughing is carried out to obtain lead roughing concentrate and lead roughing tailings; adding inhibitor Ts to lead roughing concentrate for multiple times 2 Carrying out lead concentration operation for multiple times, and adding lead collecting agent P into lead roughing tailings for multiple times 1 Carrying out lead scavenging operation for multiple times to obtain lead concentrate and lead tailings;
zinc flotation: adding copper sulfate into the lead tailings, stirring, adding a zinc collector LY, and performing zinc roughing to obtain zinc roughing concentrate and zinc roughing tailings; performing zinc concentration operation on the zinc roughing concentrate for multiple times, and adding a zinc collector LY to the zinc roughing tailings for multiple times to perform zinc scavenging operation for multiple times to obtain zinc concentrate and zinc tailings;
sulfur flotation: adding a sulfur collecting agent and a foaming agent into the zinc tailings for sulfur roughing to obtain sulfur roughing concentrate and sulfur roughing tailings; and carrying out sulfur concentration operation on the sulfur roughing concentrate for multiple times, and adding a sulfur collecting agent into the sulfur roughing tailings for multiple times to carry out sulfur scavenging operation for multiple times, so as to obtain the sulfur concentrate and the tailings.
Preferably, wherein the inhibitor Ts 2 Calculated by weight percentage, comprises: 20-30% of sodium carbonate, 1-5% of humate, 1-5% of lignosulfonate, 1-5% of bleaching powder, 10-20% of sodium sulfite and 50-60% of zinc sulfate.
Preferably, wherein the lead collector P 1 Comprises the following components in percentage by weight: 5 percent of sodium hydroxide, 70 percent to 80 percent of dipropyl dithiophosphate, 5 percent to 15 percent of imidazole mercaptan and 5 percent to 15 percent of trithiocarbonate.
Preferably, a lead collector P 1 The manufacturing steps are as follows: preparing 10% aqueous solution from sodium hydroxide, uniformly mixing dipropyl dithiophosphate and imidazole mercaptan, adding the mixture into the sodium hydroxide solution, heating to 50 ℃ and reacting for 0.5 hour to obtain solution 1. Adding trithiocarbonate into the solution 1, keeping the temperature at 50 ℃ for reaction for 0.5 hour, and obtaining brown to brownish black solution which is the lead collecting agent P after the reaction is completed 1 。
Preferably, the zinc capturing agent LY comprises the following components in percentage by weight: 70-80% of N, N-dialkyl dithiocarbamate, 10-20% of alkyl dithiophosphate thioether ester, 3-5% of octanol and 0 # 5 to 10 percent of diesel oil.
Preferably, the zinc trapping agent LY is prepared by the following steps: and (2) uniformly mixing the N, N-dialkyl dithiocarbamate and alkyl dithiophosphate thioether ester, adding octanol and diesel oil, and stirring at the rotating speed of 300r/min for 0.5h to obtain the zinc collector LY.
Preferably, the raw ore is ground to obtain raw ore pulp with the grinding fineness of-0.074 mm accounting for 60-85%.
Compared with the prior art, the invention has the beneficial effects that: at present, for the mineral separation operation of lead flotation, lime and zinc sulfate are generally required to be added so as to play a role in inhibiting zinc and sulfur in raw ore pulp, and the inhibitor is a common zinc and sulfur inhibitor. The use of a large amount of lime can cause scaling corrosion of equipment, increase the maintenance cost of the equipment and cause serious pollution to the environment. The use of a large amount of zinc sulfate can cause strong inhibition of zinc, and in zinc flotation operation, the dosage of an activating agent needs to be increased, so that the zinc recovery rate is not improved, and the dosage of a medicament and the cost of the medicament are increased.
The invention produces a high-efficiency and environment-friendly inhibitor for lead flotation zinc and sulfur in lead-zinc ores, which replaces conventional lime and zinc sulfate. The principle is that the mutual synergistic action of an inorganic inhibitor and an organic inhibitor is utilized to form a metal chelate with a plurality of metal ions under the conditions of proper proportion and pH value, so as to eliminate Ca which is an unavoidable ion in ore pulp 2+ 、Mg 2+ Etc., selectively strengthening Zn 2+ 、Fe 2+ And Fe 3+ And the like, and finally achieves the effect of inhibiting the pyrite and the sphalerite. The zinc and the sulfur are efficiently inhibited in the lead flotation, and the aims of reducing the content of the zinc and the sulfur in the lead concentrate and improving the lead recovery rate are fulfilled. The whole process of the process does not add strong acid and strong base, greatly reduces the cost of beneficiation reagents, and has obvious social benefit and economic benefit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the present invention is further described below with reference to the drawings of the specification.
Figure 1 is a flow chart of the beneficiation process adopted by the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples, but the scope of the present invention is not limited thereto. The embodiments described below are only a part of the embodiments of the present invention, and not all embodiments, and all other similar embodiments performed by those skilled in the art without inventive work are within the scope of the present invention.
In the following examples, the drugs used are all commercially available products unless otherwise specified. The specific experimental procedures or conditions are performed according to the procedures or conditions of the conventional experimental procedures described in the literature in the field.
Some of the reagents selected in the examples and comparative examples of the present invention are illustrated below:
inhibitor Ts 2 By weightAnd (3) calculating the percentage, including: 20-30% of sodium carbonate, 1-5% of humate, 1-5% of lignosulfonate, 1-5% of bleaching powder, 10-20% of sodium sulfite and 50-60% of zinc sulfate.
The regulators Ts are given below 2 For further illustration.
Inhibitor Ts 2 Example 1, sodium carbonate 30%, humate 4%, lignosulfonate 1%, bleaching powder 5%, sodium sulfite 10%, zinc sulfate 50%.
Inhibitor Ts 2 Example 2, sodium carbonate 20%, humate 1%, lignosulfonate 5%, bleaching powder 4%, sodium sulfite 10%, zinc sulfate 60%.
Inhibitor Ts 2 Example 3, sodium carbonate 21%, humate 5%, lignosulfonate 2%, bleaching powder 1%, sodium sulfite 20%, zinc sulfate 51%.
Inhibitor Ts 2 Example 4, sodium carbonate 23%, humate 3%, lignosulfonate 3%, bleaching powder 2%, sodium sulfite 12%, zinc sulfate 57%.
Lead collector P 1 Calculated according to the weight percentage, the composition comprises: 5 percent of sodium hydroxide, 70 percent to 80 percent of dipropyl dithiophosphate, 5 percent to 15 percent of imidazole mercaptan and 5 percent to 15 percent of trithiocarbonate. The preparation method comprises the steps of preparing 10% aqueous solution from sodium hydroxide, uniformly mixing dipropyl dithiophosphate and imidazole mercaptan, adding the mixture into the sodium hydroxide solution, and heating to 50 ℃ for reaction for 0.5 hour to obtain solution 1. Adding trithiocarbonate into the solution 1, keeping the temperature at 50 ℃ for reaction for 0.5 hour, and obtaining brown to brownish black solution which is the lead collecting agent P after the reaction is completed 1 。
The lead collector P is given below 1 For further illustration.
Lead collector P 1 Example 1, sodium hydroxide 5%, dipropyl dithiophosphate 80%, imidazole thiol 5%, trithiocarbonate 10%.
Lead collector P 1 Example 2 sodium hydroxide 5%, dipropyl dithiophosphate 70%, imidazole sulphur10% of alcohol and 15% of trithiocarbonate.
Lead collector P 1 Example 3, sodium hydroxide 5%, dipropyl dithiophosphate 75%, imidazole thiol 15%, trithiocarbonate 5%.
Lead collector P 1 Example 4, sodium hydroxide 5%, dipropyl dithiophosphate 73%, imidazole thiol 11%, trithiocarbonate 11%.
The zinc collector LY comprises the following components in percentage by weight: 70-80% of N, N-dialkyl dithiocarbamate, 10-20% of alkyl dithiophosphate thioether ester, 3-5% of octanol and 5-10% of diesel oil. The preparation method comprises mixing N, N-dialkyl dithiocarbamate and alkyl dithiophosphate thioether ester uniformly, adding octanol and 0 # Stirring the diesel oil for 0.5h at the rotating speed of 300r/min to obtain the zinc collector LY.
Some examples of zinc scavengers LY are given below for further illustration.
Examples of zinc collectors LY include 70% N, N-dialkyldithiocarbamate, 20% thiophosphoryl hydrocarbyl-dithiophosphate, 3% octanol and 0 # 7 percent of diesel oil.
Examples of zinc collectors LY include 72% N, N-dialkyldithiocarbamate, 13% thiophosphoryl hydrocarbyl dithiophosphate, 5% octanol and 0% # 10 percent of diesel oil.
Examples of zinc collectors LY are 80% N, N-dialkyldithiocarbamates, 10% thiophosphatanyl-dithiophosphates, 5% octanols, 0 # 5 percent of diesel oil.
Examples of zinc collectors LY include 78% N, N-dialkyldithiocarbamate, 12% thioetherdithiophosphate, 4% octanol and 0% # 6 percent of diesel oil.
Example 1
The raw ore of certain lead-zinc ore in Yunnan contains 5.77 percent of Pb, 15.52 percent of Zn and 29.25 percent of S, the main useful minerals are galena, sphalerite and pyrite, and the gangue minerals are mainly dolomite and calcite. The lead-zinc-sulfur sequential preferential flotation is carried out according to the following steps:
s1, grinding: grinding the raw ore until the grinding fineness is-0.074 mm and accounts for 75 percent to obtain raw ore pulp;
s2, lead roughing: and (3) adding the ore pulp obtained in the step (S1) into a flotation machine for lead preferential flotation, wherein the lead preferential flotation is subjected to 1 roughing, 3 scavenging and 3 fine concentration, so that lead concentrate and lead scavenging tailings are obtained. Adding 1000g/t of inhibitor Ts into the ore pulp obtained in the step S1 2 And 100g/t collector P 1 And performing lead roughing to obtain lead roughing concentrate and lead roughing tailings.
S3, lead scavenging: adding 30g/t of collecting agent P into the lead roughing tailings obtained in the step S2 1 Carrying out lead scavenging 1 to obtain lead scavenging 1 concentrate and lead scavenging 1 tailings; adding 15g/t of collecting agent P into 1 tailing of lead scavenging 1 Lead scavenging 2 is carried out to obtain lead scavenging 2 concentrate and lead scavenging 2 tailings; adding 10g/t of collecting agent P into lead scavenging 2 tailings 1 Performing lead scavenging 3 to obtain lead scavenging 3 concentrate and lead scavenging 3 tailings, wherein the lead scavenging 3 tailings are the final lead scavenging tailings; and taking lead scavenging concentrates at all levels as middlings to sequentially return to the previous level.
S4, lead fine separation: adding 200g/t of inhibitor Ts into the lead roughing concentrate obtained in the step S2 2 Performing lead concentration 1 to obtain lead concentration 1 concentrate and lead concentration 1 tailings; lead concentration 1 concentrate is added with 100g/t inhibitor Ts 2 Performing lead concentration 2 to obtain lead concentration 2 concentrate and lead concentration 2 tailings; lead concentration 2 concentrate is added with 50g/t inhibitor Ts 2 Carrying out lead concentration 3 to obtain lead concentration 3 concentrate and lead concentration 3 tailings, wherein the lead concentration 3 concentrate is the final lead concentrate; and taking the lead concentrate tailings at all levels as middlings and sequentially returning to the previous level.
S5, zinc roughing: and (4) performing zinc preferential flotation on the lead scavenging tailings obtained in the step (S3), wherein the zinc preferential flotation is performed for 1 roughing, 3 scavenging and 2 concentrating, so as to obtain zinc concentrate and zinc scavenging tailings. Adding 500g/t of activator CuSO into the lead scavenging 3 tailings obtained in the step S3 4 And 80g/t of collecting agent LY to carry out zinc roughing so as to obtain zinc roughing concentrate and zinc roughing tailings.
S6, zinc scavenging: adding 30g/t of collecting agent LY into the zinc roughing tailings obtained in the step S5 to perform zinc scavenging 1 to obtain zinc scavenging 1 concentrate and zinc scavenging 1 tailings; adding 20g/t of collecting agent LY into the tailings of the zinc scavenging 1 to carry out zinc scavenging 2 to obtain concentrate of the zinc scavenging 2 and tailings of the zinc scavenging 2; adding 10g/t of collecting agent LY into the tailings of the zinc scavenging 2 to carry out zinc scavenging 3 to obtain concentrate of the zinc scavenging 3 and tailings of the zinc scavenging 3, wherein the tailings of the zinc scavenging 3 are final tailings of the zinc scavenging; and each zinc scavenging concentrate is used as middling to sequentially return to the previous stage.
S7, zinc selection: adding no medicament to the zinc roughing concentrate obtained in the step S5, and performing zinc concentration 1 to obtain zinc concentration 1 concentrate and zinc concentration 1 tailings; adding no medicament to the concentrate of the zinc concentration 1, and performing zinc concentration 2 to obtain concentrate of the zinc concentration 2 and tailings of the zinc concentration 2, wherein the concentrate of the zinc concentration 2 is the final zinc concentrate; and returning the zinc concentration tailings at all levels as middlings to the previous level in sequence.
S8, sulfur roughing: and (4) carrying out sulfur flotation on the zinc scavenging tailings obtained in the step (S6), wherein the sulfur flotation is carried out for 1 roughing, 2 scavenging and 1 concentrating, so as to obtain sulfur concentrate and tailings. Adding 150g/t of collecting agent butyl xanthate and 20g/t of foaming agent 2 into the zinc scavenging tailings obtained in the step S6 # And carrying out sulfur roughing on the oil to obtain sulfur roughing concentrate and sulfur roughing tailings.
S9, sulfur scavenging: adding 50g/t of collecting agent butyl xanthate into the sulfur roughing tailings obtained in the step S8 to perform sulfur scavenging 1 to obtain sulfur scavenging 1 concentrate and sulfur scavenging 1 tailings; adding 20g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 1 to perform sulfur scavenging 2 to obtain concentrate of the sulfur scavenging 2 and tailings of the sulfur scavenging 2, wherein the tailings of the sulfur scavenging 2 are final tailings; and sequentially returning the sulfur scavenging concentrates at all levels as middlings to the previous level.
S10, sulfur selection: and (5) carrying out primary sulfur concentration on the sulfur roughing concentrates obtained in the step (S8) without adding a medicament to obtain sulfur concentrating concentrates and sulfur concentrating tailings, wherein the sulfur concentrating concentrates are final sulfur concentrates, and the sulfur concentrating tailings are used as middlings to return to the sulfur roughing operation.
Comparative example 1, the same raw ore as in example 1.
S1, grinding: grinding the raw ore until the grinding fineness is-0.074 mm and accounts for 75 percent to obtain raw ore pulp;
s2, lead roughing: and (3) adding the ore pulp obtained in the step (S1) into a flotation machine for lead preferential flotation, wherein the lead preferential flotation is subjected to 1 roughing, 3 scavenging and 3 fine concentration, so that lead concentrate and lead scavenging tailings are obtained. Adding 1500g/t inhibitor lime, 800g/t inhibitor zinc sulfate and100g/t collector P 1 And carrying out lead roughing to obtain lead roughing concentrate and lead roughing tailings.
S3, lead scavenging: adding 30g/t of collecting agent P into the lead roughing tailings obtained in the step S2 1 Carrying out lead scavenging 1 to obtain lead scavenging 1 concentrate and lead scavenging 1 tailings; adding 15g/t of collecting agent P into 1 tailing of lead scavenging 1 Lead scavenging 2 is carried out to obtain lead scavenging 2 concentrate and lead scavenging 2 tailings; adding 10g/t of collecting agent P into lead scavenging 2 tailings 1 Performing lead scavenging 3 to obtain lead scavenging 3 concentrate and lead scavenging 3 tailings, wherein the lead scavenging 3 tailings are the final lead scavenging tailings; and taking lead scavenging concentrates at all levels as middlings to sequentially return to the previous level.
S4, lead fine separation: adding 200g/t of inhibitor Ts into the lead roughing concentrate obtained in the step S2 2 Performing lead concentration 1 to obtain lead concentration 1 concentrate and lead concentration 1 tailings; lead concentration 1 concentrate is added with 100g/t inhibitor Ts 2 Performing lead concentration 2 to obtain lead concentration 2 concentrate and lead concentration 2 tailings; lead concentration 2 concentrate is added with 50g/t inhibitor Ts 2 Performing lead concentration 3 to obtain lead concentration 3 concentrate and lead concentration 3 tailings, wherein the lead concentration 3 concentrate is the final lead concentrate; and taking the lead concentrate tailings at all levels as middlings and sequentially returning to the previous level.
S5, zinc roughing: and (4) performing zinc preferential flotation on the lead scavenging tailings obtained in the step (S3), wherein the zinc preferential flotation is performed for 1 time of roughing, 3 times of scavenging and 2 times of concentrating to obtain zinc concentrate and zinc scavenging tailings. Adding 600g/t of activator CuSO into the lead scavenging 3 tailings obtained in the step S3 4 And 90g/t of collecting agent LY to carry out zinc roughing so as to obtain zinc roughing concentrate and zinc roughing tailings.
S6, zinc scavenging: adding 35g/t of collecting agent LY to the zinc rough tailings obtained in the step S5 to perform zinc scavenging 1 to obtain zinc scavenging 1 concentrate and zinc scavenging 1 tailings; adding 20g/t of collecting agent LY into the tailings of the zinc scavenging machine 1 to carry out zinc scavenging machine 2, so as to obtain concentrate of the zinc scavenging machine 2 and tailings of the zinc scavenging machine 2; adding 10g/t of collecting agent LY into the tailings of the zinc scavenging 2 to carry out zinc scavenging 3 to obtain concentrate of the zinc scavenging 3 and tailings of the zinc scavenging 3, wherein the tailings of the zinc scavenging 3 are final tailings of the zinc scavenging; and each zinc scavenging concentrate is used as middling to sequentially return to the previous stage.
S7, zinc selection: adding no medicament to the zinc roughing concentrate obtained in the step S5, and performing zinc concentration 1 to obtain zinc concentration 1 concentrate and zinc concentration 1 tailings; adding no medicament to the concentrate of the zinc concentration 1, and performing zinc concentration 2 to obtain concentrate of the zinc concentration 2 and tailings of the zinc concentration 2, wherein the concentrate of the zinc concentration 2 is the final zinc concentrate; and returning the zinc concentration tailings at all levels as middlings to the previous level in sequence.
S8, sulfur roughing: and (4) carrying out sulfur flotation on the zinc scavenging tailings obtained in the step (S6), wherein the sulfur flotation is carried out for 1 roughing, 2 scavenging and 1 concentrating to obtain sulfur concentrate and tailings. Adding 500g/t of activating agent sulfuric acid, 180g/t of collecting agent butyl xanthate and 20g/t of foaming agent 2 into the zinc scavenging tailings obtained in the step S6 # And carrying out sulfur roughing on the oil to obtain sulfur roughing concentrate and sulfur roughing tailings.
S9, sulfur scavenging: adding 50g/t of collecting agent butyl xanthate into the sulfur roughing tailings obtained in the step S8 to perform sulfur scavenging 1 to obtain sulfur scavenging 1 concentrate and sulfur scavenging 1 tailings; adding 30g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 1 to perform sulfur scavenging 2 to obtain concentrate of the sulfur scavenging 2 and tailings of the sulfur scavenging 2, wherein the tailings of the sulfur scavenging 2 are final tailings; and sequentially returning the sulfur scavenging concentrates at all levels as middlings to the previous level.
S10, sulfur selection: and (5) carrying out primary sulfur concentration on the sulfur roughing concentrates obtained in the step (S8) without adding a medicament to obtain sulfur concentrating concentrates and sulfur concentrating tailings, wherein the sulfur concentrating concentrates are final sulfur concentrates, and the sulfur concentrating tailings are used as middlings to return to the sulfur roughing operation.
Example 2
The Pb, zn and S contents of certain lead-zinc ore in Yunnan are respectively 6.77%, 20.54% and 28.56%, the main useful minerals are galena, sphalerite and pyrite, and the gangue minerals are mainly dolomite, calcite, muscovite and the like. The lead-zinc-sulfur sequential preferential flotation is carried out according to the following steps:
s1, grinding: grinding the raw ore until the grinding fineness is-0.074 mm and accounts for 73 percent to obtain raw ore pulp;
s2, lead roughing: and (2) adding the ore pulp obtained in the step (S1) into a flotation machine for lead preferential flotation, wherein the lead preferential flotation is subjected to 1 roughing, 3 scavenging and 3 concentrating to obtain lead concentrate and lead scavenging tailings. Adding 1200g/t of inhibitor Ts into the ore pulp obtained in the step S1 2 And 120g/t collector P 1 Lead roughing is carried out to obtain lead roughing concentrateOre and lead rougher tailings.
S3, lead scavenging: adding 40g/t of collecting agent P into the lead roughing tailings obtained in the step S2 1 Carrying out lead scavenging 1 to obtain lead scavenging 1 concentrate and lead scavenging 1 tailings; adding 20g/t of collecting agent P into lead scavenging 1 tailings 1 Lead scavenging 2 is carried out to obtain lead scavenging 2 concentrate and lead scavenging 2 tailings; adding 15g/t of collecting agent P into tailings of lead scavenging 2 1 Performing lead scavenging 3 to obtain lead scavenging 3 concentrate and lead scavenging 3 tailings, wherein the lead scavenging 3 tailings are the final lead scavenging tailings; and taking lead scavenging concentrates at all levels as middlings to sequentially return to the previous level.
S4, lead fine separation: adding 300g/t of inhibitor Ts into the lead roughing concentrate obtained in the step S2 2 Performing lead concentration 1 to obtain lead concentration 1 concentrate and lead concentration 1 tailings; lead concentration 1 concentrate is added with 200g/t inhibitor Ts 2 Performing lead concentration 2 to obtain lead concentration 2 concentrate and lead concentration 2 tailings; lead concentration 2 concentrate is added with 100g/t inhibitor Ts 2 Carrying out lead concentration 3 to obtain lead concentration 3 concentrate and lead concentration 3 tailings, wherein the lead concentration 3 concentrate is the final lead concentrate; and taking the lead concentrate tailings at all levels as middlings and sequentially returning to the previous level.
S5, zinc roughing: and (4) performing zinc preferential flotation on the lead scavenging tailings obtained in the step (S3), wherein the zinc preferential flotation is performed for 2 times of roughing, 3 times of scavenging and 1 time of fine concentration, so as to obtain zinc concentrate and zinc scavenging tailings. Adding 600g/t of activator CuSO into the lead scavenging 3 tailings obtained in the step S3 4 And 100g/t of collecting agent LY are used for zinc roughing 1 to obtain zinc roughing 1 concentrate and zinc roughing 1 tailings; adding 30g/t of collecting agent LY to the tailings of the zinc roughing 1 to carry out zinc roughing 2 to obtain concentrate of the zinc roughing 2 and tailings of the zinc roughing 2; and combining the concentrate of the zinc roughing 1 and the concentrate of the zinc roughing 2 into the concentrate of the zinc roughing.
S6, zinc scavenging: adding 40g/t of collecting agent LY to the tailings of the zinc roughing 2 obtained in the step S5 to carry out zinc scavenging 1 to obtain concentrate of the zinc scavenging 1 and tailings of the zinc scavenging 1; adding 25g/t of collecting agent LY into the tailings of the zinc scavenging 1 to carry out zinc scavenging 2 to obtain concentrate of the zinc scavenging 2 and tailings of the zinc scavenging 2; adding 15g/t of collecting agent LY into the tailings of the zinc scavenging 2 to carry out zinc scavenging 3 to obtain concentrate of the zinc scavenging 3 and tailings of the zinc scavenging 3, wherein the tailings of the zinc scavenging 3 are final tailings of the zinc scavenging; and each zinc scavenging concentrate is used as middling and sequentially returns to the previous stage.
S7, zinc selection: adding no medicament to the zinc roughing concentrate obtained in the step S5, and performing zinc concentration 1 to obtain zinc concentration 1 concentrate and zinc concentration 1 tailings; the concentrate of the zinc fine concentration 1 is the final zinc concentrate; and returning the tailings of the zinc concentration 1 to the zinc roughing 1.
S8, sulfur roughing: and (4) carrying out sulfur flotation on the zinc scavenging tailings obtained in the step (S6), wherein the sulfur flotation is carried out for 1 roughing, 2 scavenging and 1 concentrating, so as to obtain sulfur concentrate and tailings. Adding 180g/t of collecting agent butyl xanthate and 20g/t of foaming agent 2 into the zinc scavenging tailings obtained in the step S6 # And carrying out sulfur roughing on the oil to obtain sulfur roughing concentrate and sulfur roughing tailings.
S9, sulfur scavenging: adding 50g/t of collecting agent butyl xanthate into the sulfur roughing tailings obtained in the step S8 to perform sulfur scavenging 1 to obtain sulfur scavenging 1 concentrate and sulfur scavenging 1 tailings; adding 30g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 1 to perform sulfur scavenging 2 to obtain concentrate of the sulfur scavenging 2 and tailings of the sulfur scavenging 2, wherein the tailings of the sulfur scavenging 2 are final tailings; and sequentially returning the sulfur scavenging concentrates at all levels as middlings to the previous level.
S10, sulfur selection: and (5) carrying out primary sulfur concentration on the sulfur roughing concentrates obtained in the step (S8) without adding a medicament to obtain sulfur concentration concentrates and sulfur concentration tailings, wherein the sulfur concentration concentrates are final sulfur concentrates, and the sulfur concentration tailings are used as middlings to return to the sulfur roughing operation.
Comparative example 2, the same raw ore as in example 2.
S1, grinding: grinding the raw ore until the grinding fineness is-0.074 mm and accounts for 73 percent to obtain raw ore pulp;
s2, lead roughing: and (3) adding the ore pulp obtained in the step (S1) into a flotation machine for lead preferential flotation, wherein the lead preferential flotation is subjected to 1 roughing, 3 scavenging and 3 fine concentration, so that lead concentrate and lead scavenging tailings are obtained. Adding 2000g/t of inhibitor lime, 1200g/t of inhibitor zinc sulfate and 120g/t of collecting agent P into the ore pulp obtained in the step S1 1 And performing lead roughing to obtain lead roughing concentrate and lead roughing tailings.
S3, lead scavenging: adding 40g/t of collecting agent P into the lead roughing tailings obtained in the step S2 1 Performing lead scavenging 1 to obtain lead scavenging 1 concentrate and lead scavenging 1 tailings; adding 20g/t of collecting agent P into lead scavenging 1 tailings 1 Lead scavenging is carried out for 2 to obtainLead scavenging 2 concentrate and lead scavenging 2 tailing; adding 15g/t of collecting agent P into tailings of lead scavenging 2 1 Performing lead scavenging 3 to obtain lead scavenging 3 concentrate and lead scavenging 3 tailings, wherein the lead scavenging 3 tailings are the final lead scavenging tailings; and taking lead scavenging concentrates at all levels as middlings to sequentially return to the previous level.
S4, lead fine separation: adding 300g/t of inhibitor Ts into the lead roughing concentrate obtained in the step S2 2 Performing lead concentration 1 to obtain lead concentration 1 concentrate and lead concentration 1 tailings; lead concentration 1 concentrate is added with 200g/t inhibitor Ts 2 Performing lead concentration 2 to obtain lead concentration 2 concentrate and lead concentration 2 tailings; lead concentration 2 concentrate is added with 100g/t inhibitor Ts 2 Carrying out lead concentration 3 to obtain lead concentration 3 concentrate and lead concentration 3 tailings, wherein the lead concentration 3 concentrate is the final lead concentrate; and taking the lead concentrate tailings at all levels as middlings and sequentially returning to the previous level.
S5, zinc roughing: and (4) performing zinc preferential flotation on the lead scavenging tailings obtained in the step (S3), wherein the zinc preferential flotation is performed for 2 times of roughing, 3 times of scavenging and 1 time of fine concentration, so as to obtain zinc concentrate and zinc scavenging tailings. Adding 700g/t of activator CuSO into the lead scavenging 3 tailings obtained in the step S3 4 And 110g/t of collecting agent LY to carry out zinc rough concentration 1 to obtain zinc rough concentration 1 concentrate and zinc rough concentration 1 tailings; adding 30g/t of collecting agent LY into the tailings of the zinc roughing 1 to carry out zinc roughing 2 to obtain concentrate of the zinc roughing 2 and tailings of the zinc roughing 2; and combining the concentrate of the zinc roughing 1 and the concentrate of the zinc roughing 2 into the concentrate of the zinc roughing.
S6, zinc scavenging: adding 45g/t of collecting agent LY into the tailings of the zinc roughing 2 obtained in the step S5 to carry out zinc scavenging 1, so as to obtain concentrate of the zinc scavenging 1 and tailings of the zinc scavenging 1; adding 25g/t of collecting agent LY into the tailings of the zinc scavenging machine 1 to carry out zinc scavenging machine 2, so as to obtain concentrate of the zinc scavenging machine 2 and tailings of the zinc scavenging machine 2; adding 20g/t of collecting agent LY into the tailings of the zinc scavenging 2 to carry out zinc scavenging 3 to obtain concentrate of the zinc scavenging 3 and tailings of the zinc scavenging 3, wherein the tailings of the zinc scavenging 3 are final tailings of the zinc scavenging; and each zinc scavenging concentrate is used as middling to sequentially return to the previous stage.
S7, zinc selection: adding no medicament to the zinc roughing concentrate obtained in the step S5, and performing zinc concentration 1 to obtain zinc concentration 1 concentrate and zinc concentration 1 tailings; the concentrate of the zinc concentration 1 is the final zinc concentrate; and returning the tailings of the zinc concentration 1 to the zinc roughing 1.
S8, sulfur roughing: and (4) carrying out sulfur flotation on the zinc scavenging tailings obtained in the step (S6), wherein the sulfur flotation is carried out for 1 roughing, 2 scavenging and 1 concentrating, so as to obtain sulfur concentrate and tailings. Adding 800g/t of activating agent sulfuric acid, 200g/t of collecting agent butyl xanthate and 20g/t of foaming agent 2 into the zinc scavenging tailings obtained in the step S6 # And carrying out sulfur roughing on the oil to obtain sulfur roughing concentrate and sulfur roughing tailings.
S9, sulfur scavenging: adding 60g/t of collecting agent butyl xanthate into the sulfur roughing tailings obtained in the step S8 to perform sulfur scavenging 1 to obtain sulfur scavenging 1 concentrate and sulfur scavenging 1 tailings; adding 30g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 1 to perform sulfur scavenging 2 to obtain concentrate of the sulfur scavenging 2 and tailings of the sulfur scavenging 2, wherein the tailings of the sulfur scavenging 2 are final tailings; and sequentially returning the sulfur scavenging concentrates at all levels as middlings to the previous level.
S10, sulfur selection: and (5) carrying out primary sulfur concentration on the sulfur roughing concentrates obtained in the step (S8) without adding a medicament to obtain sulfur concentration concentrates and sulfur concentration tailings, wherein the sulfur concentration concentrates are final sulfur concentrates, and the sulfur concentration tailings are used as middlings to return to the sulfur roughing operation.
Example 3
The Pb, zn and S contents of certain lead-zinc ores in inner Mongolia are respectively 3.14%, 2.93% and 22.36%, the main useful minerals are galena, sphalerite and pyrite, and the gangue minerals are mainly quartz, muscovite, kaolinite and the like. The lead-zinc-sulfur sequential preferential flotation is carried out according to the following steps:
s1, grinding: grinding the raw ore until the grinding fineness is-0.074 mm and accounts for 70 percent to obtain raw ore pulp;
s2, lead roughing: and (3) adding the ore pulp obtained in the step (S1) into a flotation machine for lead preferential flotation, wherein the lead preferential flotation is subjected to 1 roughing, 3 scavenging and 3 fine concentration, so that lead concentrate and lead scavenging tailings are obtained. Adding 800g/t of inhibitor Ts into the ore pulp obtained in the step S1 2 And 70g/t collector P 1 And performing lead roughing to obtain lead roughing concentrate and lead roughing tailings.
S3, lead scavenging: adding 20g/t of collecting agent P into the lead roughing tailings obtained in the step S2 1 Carrying out lead scavenging 1 to obtain lead scavenging 1 concentrate and lead scavenging 1 tailings; adding 10g/t of collecting agent P into lead scavenging 1 tailings 1 Lead scavenging 2 is carried out to obtain lead scavenging 2 essenceMine and lead scavenging 2 tailings; adding 5g/t of collecting agent P into lead scavenging 2 tailings 1 Performing lead scavenging 3 to obtain lead scavenging 3 concentrate and lead scavenging 3 tailings, wherein the lead scavenging 3 tailings are the final lead scavenging tailings; and taking lead scavenging concentrates at all levels as middlings to sequentially return to the previous level.
S4, lead fine separation: 130g/t inhibitor Ts is added into the lead roughing concentrate 2 Performing lead concentration 1 to obtain lead concentration 1 concentrate and lead concentration 1 tailings; lead concentration 1 concentrate is added with 80g/t inhibitor Ts 2 Performing lead concentration 2 to obtain lead concentration 2 concentrate and lead concentration 2 tailings; lead concentration 2 concentrate is added with 50g/t inhibitor Ts 2 Carrying out lead concentration 3 to obtain lead concentration 3 concentrate and lead concentration 3 tailings, wherein the lead concentration 3 concentrate is the final lead concentrate; and taking the lead concentrate tailings at all levels as middlings and sequentially returning to the previous level.
S5, zinc roughing: and (4) performing zinc preferential flotation on the lead scavenging tailings obtained in the step (S3), wherein the zinc preferential flotation is performed for 1 time of roughing, 3 times of scavenging and 2 times of concentrating to obtain zinc concentrate and zinc scavenging tailings. Adding 300g/t of activator CuSO into the lead scavenging 3 tailings obtained in the step S3 4 And 60g/t of collecting agent LY to carry out zinc roughing so as to obtain zinc roughing concentrate and zinc roughing tailings.
S6, zinc scavenging: adding 20g/t of collecting agent LY into the zinc roughing tailings obtained in the step S5 to perform zinc scavenging 1 to obtain zinc scavenging 1 concentrate and zinc scavenging 1 tailings; adding 10g/t of collecting agent LY into the tailings of the zinc scavenging machine 1 to carry out zinc scavenging machine 2, so as to obtain concentrate of the zinc scavenging machine 2 and tailings of the zinc scavenging machine 2; adding 5g/t of collecting agent LY into the tailings of the zinc scavenging 2 to carry out zinc scavenging 3 to obtain concentrate of the zinc scavenging 3 and tailings of the zinc scavenging 3, wherein the tailings of the zinc scavenging 3 are final tailings of the zinc scavenging; and each zinc scavenging concentrate is used as middling and sequentially returns to the previous stage.
S7, zinc selection: adding no medicament to the zinc roughing concentrate obtained in the step S5, and performing zinc concentration 1 to obtain zinc concentration 1 concentrate and zinc concentration 1 tailings; adding no medicament to the concentrate of the zinc concentration 1, and performing zinc concentration 2 to obtain concentrate of the zinc concentration 2 and tailings of the zinc concentration 2, wherein the concentrate of the zinc concentration 2 is the final zinc concentrate; and returning the zinc concentration tailings at all levels as middlings to the previous level in sequence.
S8, sulfur roughing: carrying out sulfur flotation on the zinc scavenging tailings obtained in the step S6,the sulfur flotation is carried out for 1 time of roughing, 2 times of scavenging and 1 time of concentrating to obtain sulfur concentrate and tailings. Adding 140g/t of collecting agent butyl xanthate and 20g/t of foaming agent 2 into the zinc scavenging tailings obtained in the step S6 # And carrying out sulfur roughing on the oil to obtain sulfur roughing concentrate and sulfur roughing tailings.
S9, sulfur scavenging: adding 45g/t collecting agent butyl xanthate into the sulfur roughing tailings obtained in the step S8 to perform sulfur scavenging 1 to obtain sulfur scavenging 1 concentrate and sulfur scavenging 1 tailings; adding 15g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 1 to perform sulfur scavenging 2 to obtain concentrate of the sulfur scavenging 2 and tailings of the sulfur scavenging 2, wherein the tailings of the sulfur scavenging 2 are final tailings; and sequentially returning the sulfur scavenging concentrates at all levels as middlings to the previous level.
S10, sulfur selection: and (5) carrying out primary sulfur concentration on the sulfur roughing concentrates obtained in the step (S8) without adding a medicament to obtain sulfur concentration concentrates and sulfur concentration tailings, wherein the sulfur concentration concentrates are final sulfur concentrates, and the sulfur concentration tailings are used as middlings to return to the sulfur roughing operation.
Comparative example 3, the same raw ore as in example 3.
S1, grinding: grinding the raw ore until the grinding fineness is-0.074 mm and accounts for 70 percent to obtain raw ore pulp;
s2, lead roughing: and (3) adding the ore pulp obtained in the step (S1) into a flotation machine for lead preferential flotation, wherein the lead preferential flotation is subjected to 1 roughing, 3 scavenging and 3 fine concentration, so that lead concentrate and lead scavenging tailings are obtained. Adding 1500g/t lime, 700g/t zinc sulfate and 80g/t collecting agent P into the ore pulp obtained in the step S1 1 And performing lead roughing to obtain lead roughing concentrate and lead roughing tailings.
S3, lead scavenging: adding 25g/t of collecting agent P into the lead roughing tailings obtained in the step S2 1 Carrying out lead scavenging 1 to obtain lead scavenging 1 concentrate and lead scavenging 1 tailings; adding 10g/t of collecting agent P into 1 tailing of lead scavenging 1 Lead scavenging 2 is carried out to obtain lead scavenging 2 concentrate and lead scavenging 2 tailings; adding 5g/t of collecting agent P into lead scavenging 2 tailings 1 Performing lead scavenging 3 to obtain lead scavenging 3 concentrate and lead scavenging 3 tailings, wherein the lead scavenging 3 tailings are the final lead scavenging tailings; and taking lead scavenging concentrates at all levels as middlings to sequentially return to the previous level.
S4, lead fine separation: 130g/t inhibitor Ts is added into the lead roughing concentrate 2 Performing lead concentration 1 to obtain lead concentration 1 concentrate and lead concentration 1 tailings; lead concentration 1 concentrate is added with 80g/t inhibitor Ts 2 Performing lead concentration 2 to obtain lead concentration 2 concentrate and lead concentration 2 tailings; lead concentration 2 concentrate is added with 50g/t inhibitor Ts 2 Carrying out lead concentration 3 to obtain lead concentration 3 concentrate and lead concentration 3 tailings, wherein the lead concentration 3 concentrate is the final lead concentrate; and taking the lead concentrate tailings at all levels as middlings and sequentially returning to the previous level.
S5, zinc roughing: and (4) performing zinc preferential flotation on the lead scavenging tailings obtained in the step (S3), wherein the zinc preferential flotation is performed for 1 roughing, 3 scavenging and 2 concentrating, so as to obtain zinc concentrate and zinc scavenging tailings. Adding 350g/t of activator CuSO into the lead scavenging 3 tailings obtained in the step S3 4 And 65g/t of collecting agent LY for zinc roughing to obtain zinc roughing concentrate and zinc roughing tailings.
S6, zinc scavenging: adding 25g/t of collecting agent LY into the zinc roughing tailings obtained in the step S5 to perform zinc scavenging 1 to obtain zinc scavenging 1 concentrate and zinc scavenging 1 tailings; adding 10g/t of collecting agent LY into the tailings of the zinc scavenging machine 1 to carry out zinc scavenging machine 2, so as to obtain concentrate of the zinc scavenging machine 2 and tailings of the zinc scavenging machine 2; adding 5g/t of collecting agent LY to the zinc scavenging tailings 2 to carry out zinc scavenging 3 to obtain zinc scavenging 3 concentrate and zinc scavenging 3 tailings, wherein the zinc scavenging 3 tailings is the final zinc scavenging tailings; and each zinc scavenging concentrate is used as middling to sequentially return to the previous stage.
S7, zinc selection: adding no medicament to the zinc roughing concentrate obtained in the step S5, and performing zinc concentration 1 to obtain zinc concentration 1 concentrate and zinc concentration 1 tailings; adding no medicament to the concentrate of the zinc concentration 1, and performing zinc concentration 2 to obtain concentrate of the zinc concentration 2 and tailings of the zinc concentration 2, wherein the concentrate of the zinc concentration 2 is the final zinc concentrate; and returning the zinc concentration tailings at all levels as middlings to the previous level in sequence.
S8, sulfur roughing: and (4) carrying out sulfur flotation on the zinc scavenging tailings obtained in the step (S6), wherein the sulfur flotation is carried out for 1 roughing, 2 scavenging and 1 concentrating, so as to obtain sulfur concentrate and tailings. Adding 400g/t of activating agent sulfuric acid, 150g/t of collecting agent butyl xanthate and 20g/t of foaming agent 2 into the zinc scavenging tailings obtained in the step S6 # And carrying out sulfur roughing on the oil to obtain sulfur roughing concentrate and sulfur roughing tailings.
S9, sulfur scavenging: adding 55g/t of collecting agent butyl xanthate into the sulfur roughing tailings obtained in the step S8 to perform sulfur scavenging 1 to obtain sulfur scavenging 1 concentrate and sulfur scavenging 1 tailings; adding 15g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 1 to perform sulfur scavenging 2 to obtain concentrate of the sulfur scavenging 2 and tailings of the sulfur scavenging 2, wherein the tailings of the sulfur scavenging 2 are final tailings; and sequentially returning the sulfur scavenging concentrates at all levels as middlings to the previous level.
S10, sulfur selection: and (5) carrying out primary sulfur concentration on the sulfur roughing concentrates obtained in the step (S8) without adding a medicament to obtain sulfur concentration concentrates and sulfur concentration tailings, wherein the sulfur concentration concentrates are final sulfur concentrates, and the sulfur concentration tailings are used as middlings to return to the sulfur roughing operation.
Example 4
The Pb, zn and S contents of some lead-zinc ore in Guangxi are respectively 0.72%, 2.68% and 7.66%, the main useful minerals are galena, sphalerite and pyrite, and the gangue minerals are mainly barite, dolomite, quartz, mica and the like. The lead-zinc-sulfur sequential preferential flotation is carried out according to the following steps:
s1, grinding: grinding the raw ore until the grinding fineness is-0.074 mm and accounts for 80 percent to obtain raw ore pulp;
s2, lead roughing: and (3) adding the ore pulp obtained in the step (S1) into a flotation machine for lead preferential flotation, wherein the lead preferential flotation is subjected to 1 roughing, 3 scavenging and 3 fine concentration, so that lead concentrate and lead scavenging tailings are obtained. Adding 800g/t of inhibitor Ts into the ore pulp obtained in the step S1 2 And 60g/t collector P 1 And performing lead roughing to obtain lead roughing concentrate and lead roughing tailings.
S3, lead scavenging: adding 20g/t of collecting agent P into the lead roughing tailings obtained in the step S2 1 Carrying out lead scavenging 1 to obtain lead scavenging 1 concentrate and lead scavenging 1 tailings; adding 10g/t of collecting agent P into lead scavenging 1 tailings 1 Lead scavenging 2 is carried out to obtain lead scavenging 2 concentrate and lead scavenging 2 tailings; adding 5g/t of collecting agent P into lead scavenging 2 tailings 1 Performing lead scavenging 3 to obtain lead scavenging 3 concentrate and lead scavenging 3 tailings, wherein the lead scavenging 3 tailings are the final lead scavenging tailings; and taking lead scavenging concentrates at all levels as middlings to sequentially return to the previous level.
S4, lead fine separation: adding 150g/t of inhibitor Ts into the lead roughing concentrate obtained in the step S2 2 Performing lead concentration 1 to obtain lead concentration 1 concentrate and lead concentration 1 tailings;lead concentration 1 concentrate is added with 80g/t inhibitor Ts 2 Performing lead concentration 2 to obtain lead concentration 2 concentrate and lead concentration 2 tailings; lead concentration 2 concentrate is added with 30g/t inhibitor Ts 2 Carrying out lead concentration 3 to obtain lead concentration 3 concentrate and lead concentration 3 tailings, wherein the lead concentration 3 concentrate is the final lead concentrate; and taking the lead concentrate tailings at all levels as middlings to return to the previous level in sequence.
S5, zinc roughing: and (4) performing zinc preferential flotation on the lead scavenging tailings obtained in the step (S3), wherein the zinc preferential flotation is performed for 1 time of roughing, 3 times of scavenging and 3 times of concentrating to obtain zinc concentrate and zinc scavenging tailings. Adding 300g/t of activator CuSO into the lead scavenging 3 tailings obtained in the step S3 4 And carrying out zinc rough concentration by using a collecting agent LY at 60g/t to obtain zinc rough concentrate and zinc rough tailings.
S6, zinc scavenging: adding 30g/t of collecting agent LY into the zinc roughing tailings obtained in the step S5 to perform zinc scavenging 1 to obtain zinc scavenging 1 concentrate and zinc scavenging 1 tailings; adding 20g/t of collecting agent LY into the tailings of the zinc scavenging machine 1 to carry out zinc scavenging machine 2, so as to obtain concentrate of the zinc scavenging machine 2 and tailings of the zinc scavenging machine 2; adding 10g/t of collecting agent LY into the tailings of the zinc scavenging 2 to carry out zinc scavenging 3 to obtain concentrate of the zinc scavenging 3 and tailings of the zinc scavenging 3, wherein the tailings of the zinc scavenging 3 are final tailings of the zinc scavenging; and each zinc scavenging concentrate is used as middling and sequentially returns to the previous stage.
S7, zinc selection: adding no medicament to the zinc roughing concentrate obtained in the step S5, and performing zinc concentration 1 to obtain zinc concentration 1 concentrate and zinc concentration 1 tailings; adding no medicament into the concentrate of the zinc concentration 1, and performing zinc concentration 2 to obtain concentrate of the zinc concentration 2 and tailings of the zinc concentration 2; adding no medicament to the concentrate of the zinc concentration 2, and performing zinc concentration 3 to obtain concentrate of the zinc concentration 3 and tailings of the zinc concentration 3, wherein the concentrate of the zinc concentration 3 is the final zinc concentrate; and returning the zinc concentration tailings at all levels as middlings to the previous level in sequence.
S8, sulfur roughing: and (4) carrying out sulfur flotation on the zinc scavenging tailings obtained in the step (S6), wherein the sulfur flotation is carried out for 1 time of roughing, 3 times of scavenging and 2 times of concentrating, so as to obtain sulfur concentrate and tailings. Adding 80g/t of collecting agent butyl xanthate and 20g/t of foaming agent 2 into the zinc scavenging tailings obtained in the step S6 # And carrying out sulfur roughing on the oil to obtain sulfur roughing concentrate and sulfur roughing tailings.
S9, sulfur scavenging: adding 30g/t of collecting agent butyl xanthate into the sulfur roughing tailings obtained in the step S8 to perform sulfur scavenging 1 to obtain sulfur scavenging 1 concentrate and sulfur scavenging 1 tailings; adding 10g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 1 to perform sulfur scavenging 2 to obtain concentrate of the sulfur scavenging 2 and tailings of the sulfur scavenging 2; adding 5g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 2 to perform sulfur scavenging 3 to obtain concentrate of the sulfur scavenging 3 and tailings of the sulfur scavenging 3, wherein the tailings of the sulfur scavenging 3 are final tailings; and sequentially returning the sulfur scavenging concentrates at all levels as middlings to the previous level.
S10, sulfur selection: carrying out sulfur concentration 1 on the sulfur roughing concentrate obtained in the step S8 without adding a medicament to obtain a sulfur concentration 1 concentrate and a sulfur concentration 1 tailing; and (3) carrying out sulfur concentration 2 on the concentrate of the sulfur concentration 1 without adding a medicament to obtain a concentrate of the sulfur concentration 2 and tailings of the sulfur concentration 2, wherein the concentrate of the sulfur concentration 2 is the final sulfur concentrate, and the tailings of the sulfur concentration at each stage are sequentially returned to the previous stage.
Comparative example 4, the same raw ore as in example 4.
S1, grinding: grinding the raw ore until the grinding fineness is-0.074 mm and accounts for 80 percent to obtain raw ore pulp;
s2, lead roughing: and (3) adding the ore pulp obtained in the step (S1) into a flotation machine for lead preferential flotation, wherein the lead preferential flotation is subjected to 1 roughing, 3 scavenging and 3 fine concentration, so that lead concentrate and lead scavenging tailings are obtained. Adding 1000g/t lime, 600g/t zinc sulfate and 60g/t collecting agent P into the ore pulp obtained in the step S1 1 And performing lead roughing to obtain lead roughing concentrate and lead roughing tailings.
S3, lead scavenging: adding 20g/t of collecting agent P into the lead roughing tailings obtained in the step S2 1 Performing lead scavenging 1 to obtain lead scavenging 1 concentrate and lead scavenging 1 tailings; adding 10g/t of collecting agent P into 1 tailing of lead scavenging 1 Lead scavenging 2 is carried out to obtain lead scavenging 2 concentrate and lead scavenging 2 tailings; adding 5g/t of collecting agent P into lead scavenging 2 tailings 1 Performing lead scavenging 3 to obtain lead scavenging 3 concentrate and lead scavenging 3 tailings, wherein the lead scavenging 3 tailings are the final lead scavenging tailings; and taking lead scavenging concentrates at all levels as middlings to sequentially return to the previous level.
S4, lead fine separation: adding 150g/t of inhibitor Ts into the lead roughing concentrate obtained in the step S2 2 Performing lead concentration 1 to obtain lead concentration 1 concentrate and lead concentration 1 tailings; lead concentration 1 concentrate is added with 80g/t inhibitor Ts 2 Performing lead concentration 2 to obtain lead concentration 2 concentrate and lead concentration 2 tailings; lead concentration 2 concentrate is added with 30g/t inhibitor Ts 2 Performing lead concentration 3 to obtain lead concentration 3 concentrate and lead concentration 3 tailings, wherein the lead concentration 3 concentrate is the final lead concentrate; and taking the lead concentrate tailings at all levels as middlings and sequentially returning to the previous level.
S5, zinc roughing: and (4) performing zinc preferential flotation on the lead scavenging tailings obtained in the step (S3), wherein the zinc preferential flotation is performed for 1 roughing, 3 scavenging and 3 concentrating, so as to obtain zinc concentrate and zinc scavenging tailings. Adding 350g/t of activator CuSO into the lead scavenging 3 tailings obtained in the step S3 4 And 70g/t of collecting agent LY to carry out zinc roughing so as to obtain zinc roughing concentrate and zinc roughing tailings.
S6, zinc scavenging: adding 35g/t of collecting agent LY to the zinc rough tailings obtained in the step S5 to perform zinc scavenging 1 to obtain zinc scavenging 1 concentrate and zinc scavenging 1 tailings; adding 20g/t of collecting agent LY into the tailings of the zinc scavenging 1 to carry out zinc scavenging 2 to obtain concentrate of the zinc scavenging 2 and tailings of the zinc scavenging 2; adding 10g/t of collecting agent LY into the tailings of the zinc scavenging 2 to carry out zinc scavenging 3 to obtain concentrate of the zinc scavenging 3 and tailings of the zinc scavenging 3, wherein the tailings of the zinc scavenging 3 are final tailings of the zinc scavenging; and each zinc scavenging concentrate is used as middling to sequentially return to the previous stage.
S7, zinc selection: adding no medicament to the zinc roughing concentrate obtained in the step S5, and performing zinc concentration 1 to obtain zinc concentration 1 concentrate and zinc concentration 1 tailings; adding no medicament to the concentrate of the zinc concentration 1, and performing zinc concentration 2 to obtain concentrate of the zinc concentration 2 and tailings of the zinc concentration 2; adding no medicament to the concentrate of the zinc concentration 2, and performing zinc concentration 3 to obtain concentrate of the zinc concentration 3 and tailings of the zinc concentration 3, wherein the concentrate of the zinc concentration 3 is the final zinc concentrate; and returning the zinc concentration tailings at all levels as middlings to the previous level in sequence.
S8, sulfur roughing: and (4) carrying out sulfur flotation on the zinc scavenging tailings obtained in the step (S6), wherein the sulfur flotation is carried out for 1 roughing, 3 scavenging and 2 concentrating, so as to obtain sulfur concentrate and tailings. Adding 300g/t of activating agent sulfuric acid, 100g/t of collecting agent butyl xanthate and 20g/t of foaming agent 2 into the zinc scavenging tailings obtained in the step S6 # And carrying out sulfur roughing on the oil to obtain sulfur roughing concentrate and sulfur roughing tailings.
S9, sulfur scavenging: adding 30g/t of collecting agent butyl xanthate into the sulfur roughing tailings obtained in the step S8 to perform sulfur scavenging 1 to obtain sulfur scavenging 1 concentrate and sulfur scavenging 1 tailings; adding 15g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 1 to perform sulfur scavenging 2 to obtain concentrate of the sulfur scavenging 2 and tailings of the sulfur scavenging 2; adding 5g/t of collecting agent butyl xanthate into the tailings of the sulfur scavenging 2 to perform sulfur scavenging 3 to obtain concentrate of the sulfur scavenging 3 and tailings of the sulfur scavenging 3, wherein the tailings of the sulfur scavenging 3 are final tailings; and sequentially returning the sulfur scavenging concentrates at all levels as middlings to the previous level.
S10, sulfur selection: carrying out sulfur concentration 1 on the sulfur roughing concentrate obtained in the step S8 without adding a medicament to obtain a sulfur concentration 1 concentrate and a sulfur concentration 1 tailing; and (3) carrying out sulfur concentration 2 on the concentrate of the sulfur concentration 1 without adding a medicament to obtain a concentrate of the sulfur concentration 2 and tailings of the sulfur concentration 2, wherein the concentrate of the sulfur concentration 2 is the final sulfur concentrate, and the tailings of the sulfur concentration at each stage are sequentially returned to the previous stage.
TABLE 2 test results
The above examples illustrate that, in the method provided by the present invention, the inhibitor of the present invention is used to inhibit zinc and sulfur, and for the same raw ore, the same collecting agent and lead preferential flotation can be performed to obtain lead concentrate with higher grade and recovery rate, the loss of zinc in the lead concentrate is smaller, and the recovery rate of zinc in the lead tailings is higher, which further illustrates that the inhibition effect is better than that of conventional lime and zinc sulfate. And because of the addition of lime, the activator CuSO is used for selecting zinc in the comparative example 4 And the amount of collector LY increases, the activator sulfuric acid needs to be added in the sulfur flotation operation, and the amount of collector xanthate increases. Therefore, compared with the prior art, the beneficiation reagent has the advantages of reduced dosage and low reagent cost.
Claims (8)
1. An inhibitor applied to lead flotation in lead-zinc ores is characterized in that: inhibitor Ts 2 Comprises the following components in percentage by weight:20-30% of sodium carbonate, 1-5% of humate, 1-5% of lignosulfonate, 1-5% of bleaching powder, 10-20% of sodium sulfite and 50-60% of zinc sulfate.
2. A lead-zinc ore beneficiation method using the inhibitor of claim 1, characterized in that: the method comprises the following steps:
i. grinding: grinding raw ore to obtain raw ore pulp;
lead flotation: comprises lead roughing, lead scavenging and lead concentration, wherein an inhibitor Ts is added into raw ore pulp 2 Adding the lead collecting agent P after post-stirring 1 Lead roughing is carried out to obtain lead roughing concentrate and lead roughing tailings; adding inhibitor Ts to lead roughing concentrate for multiple times 2 Carrying out lead concentration operation for multiple times, and adding lead collecting agent P into lead roughing tailings for multiple times 1 Carrying out lead scavenging operation for multiple times to obtain lead concentrate and lead tailings;
zinc flotation: the method comprises the steps of zinc roughing, zinc scavenging and zinc concentration, wherein lead tailings are added with copper sulfate and stirred, and then zinc collector LY is added to carry out zinc roughing to obtain zinc roughing concentrate and zinc roughing tailings; performing zinc concentration operation on the zinc rough concentration concentrate for multiple times, and adding a zinc collector LY into the zinc rough concentration tailings for multiple times to perform zinc scavenging operation for multiple times to obtain zinc concentrate and zinc tailings;
sulfur flotation: the method comprises the steps of sulfur roughing, sulfur scavenging and sulfur concentration, wherein sulfur collecting agents and foaming agents are added into zinc tailings for sulfur roughing to obtain sulfur roughing concentrate and sulfur roughing tailings; and carrying out sulfur concentration operation on the sulfur roughing concentrate for multiple times, and adding a sulfur collecting agent into the sulfur roughing tailings for multiple times to carry out sulfur scavenging operation for multiple times, so as to obtain the sulfur concentrate and the tailings.
3. The lead-zinc ore beneficiation method according to claim 2, characterized in that: wherein the inhibitor Ts 2 Calculated by weight percentage, comprises: 20-30% of sodium carbonate, 1-5% of humate, 1-5% of lignosulfonate, 1-5% of bleaching powder, 10-20% of sodium sulfite and 50-60% of zinc sulfate.
4. According to the rightThe beneficiation method for lead-zinc ores according to claim 2, characterized in that: wherein the lead collector P 1 Comprises the following components in percentage by weight: 5 percent of sodium hydroxide, 70 percent to 80 percent of dipropyl dithiophosphate, 5 percent to 15 percent of imidazole mercaptan and 5 percent to 15 percent of trithiocarbonate.
5. The lead-zinc ore beneficiation method according to claim 4, characterized in that: lead collector P 1 The manufacturing steps are as follows: preparing 10% aqueous solution from sodium hydroxide, uniformly mixing dipropyl dithiophosphate and imidazole thiol, adding the mixture into the sodium hydroxide solution, heating to 50 ℃ and reacting for 0.5 hour to obtain solution 1; adding trithiocarbonate into the solution 1, keeping the temperature at 50 ℃ for reaction for 0.5 hour, and obtaining brown to brownish black solution which is the lead collecting agent P after the reaction is completed 1 。
6. The lead-zinc ore beneficiation method according to claim 2, characterized in that: wherein the zinc capturing agent LY comprises the following components in percentage by weight: 70-80% of N, N-dialkyl dithiocarbamate, 10-20% of alkyl dithiophosphate thioether ester, 3-5% of octanol and 0 # 5 to 10 percent of diesel oil.
7. The lead-zinc ore beneficiation method according to claim 6, characterized in that: the preparation method of the zinc collector LY comprises the following steps: mixing N, N-dialkyl dithiocarbamate and alkyl dithiophosphate thioether ester uniformly, adding octanol and 0 # Stirring the diesel oil for 0.5h at the rotating speed of 300r/min to obtain the zinc collector LY.
8. The lead-zinc ore beneficiation method according to claim 2, characterized in that: grinding the raw ore to obtain raw ore pulp with the grinding fineness of-0.074 mm accounting for 60-85%.
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| CN202211567481.5A CN115814959A (en) | 2022-12-07 | 2022-12-07 | Inhibitor applied to lead flotation of lead-zinc ore and application thereof |
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| CN202211567481.5A CN115814959A (en) | 2022-12-07 | 2022-12-07 | Inhibitor applied to lead flotation of lead-zinc ore and application thereof |
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