A zinc collector for lead-zinc ore, its preparation method and application

Abstract

The present invention discloses a lead-zinc ore zinc collector and its preparation method and application. The lead-zinc ore zinc collector is calculated by weight and includes: 50 to 90 parts of N, N-dialkyl dithiocarbamate, 8 to 35 parts of alkyl dithiophosphate thioether ester, 2 to 6 parts of octanol, and 3 to 12 parts of non-polar oil; the non-polar oil includes one or two of kerosene and diesel. The present invention uses N, N-dialkyl dithiocarbamate, alkyl dithiophosphate thioether ester, octanol and non-polar oil as raw materials, and prepares the lead-zinc ore zinc collector by regulating the amount of each raw material, especially regulating the ratio of octanol and non-polar oil, thereby improving the flotation effect and zinc grade of zinc in the ore. In addition, the preparation method of the lead-zinc ore zinc collector has the advantages of simple operation, low cost, short production cycle, etc., and can realize industrial large-scale production, thereby promoting the development of the zinc ore dressing industry.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral processing, and more specifically, to a zinc collector for lead-zinc ore, a preparation method thereof, and an application thereof. Background Art

[0002] Zinc is an important strategic resource and plays an important role in the non-ferrous metal industry. Zinc ore generally coexists with lead and exists in the form of lead-zinc ore in nature. Zinc is usually recovered from lead-zinc ore through flotation recovery technology. At present, the commonly used flotation collectors for zinc flotation in lead-zinc ore are one or a mixture of ethyl xanthate, butylamine black medicine, butyl xanthate, etc. At the same time, these flotation collectors usually require a strong acid or strong base working environment, and the use of strong acid or strong base will bring problems such as exceeding the pH standard of ore dressing wastewater, equipment corrosion, and environmental pollution. Chinese Patent CN102806148A prepared a collector for high-sulfur copper ore that can be used in the pH range of 6-11 by using alkyl dithiophosphate thioether ester, sulfur nitride ester, propionitrile alkyl xanthate, and sulfur nitride ester. Although this patent reduces the pH value of the collector working environment and enables the collector to be used in a neutral environment, the flotation mineral object of this collector is copper, and there are great differences in the flotation effects of the same flotation collector on different mineral objects. Therefore, when this collector for high-sulfur copper ore is used for flotation recovery of zinc, the flotation effect is poor and the zinc grade is low. Therefore, it is of great value to modify the collector for high-sulfur copper ore prepared by alkyl dithiophosphate thioether ester, sulfur nitride ester, propionitrile alkyl xanthate, and sulfur nitride ester or to develop a new and efficient zinc collector to improve the flotation effect when flotation recovering zinc. Summary of the Invention

[0003] The primary object of the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a zinc collector for lead-zinc ore. Using N,N-dialkyldithiocarbamate, alkyl dithiophosphate thioether ester, octanol, and non-polar oil as raw materials, by regulating the dosage of each raw material, especially regulating the ratio of octanol to non-polar oil, a zinc collector for lead-zinc ore is prepared to improve the flotation effect and zinc grade of zinc in the ore.

[0004] Another object of the present invention is to provide a preparation method for the above-mentioned zinc collector for lead-zinc ore. This preparation method has the advantages of simple operation, low cost, short production cycle, etc., and can realize industrial large-scale production, thereby promoting the development of the zinc industry.

[0005] Another object of the present invention is to provide a method for flotation recovering zinc from ore using the above-mentioned zinc collector for lead-zinc ore.

[0006] Another object of the present invention is to provide a method for flotation recovering zinc from lead-zinc ore using the above-mentioned zinc collector for lead-zinc ore.

[0007] To achieve the above technical objects, the present invention is realized through the following technical solutions:

[0008] A zinc collector for lead-zinc ore, calculated by parts by weight, comprising:

[0009] 50-90 parts of N,N-dialkyl dithiocarbamate, 8-35 parts of alkyl dithiophosphate thioether, 2-6 parts of octanol, 3-12 parts of non-polar oil;

[0010] The non-polar oil comprises one or both of kerosene and diesel.

[0011] In order to improve the flotation effect of N,N-dialkyl dithiocarbamate (a type of sulfur nitrogen ester) and hydrocarbyl dithiophosphate thioether ester on Zn, the inventors conducted multiple experiments and prepared a zinc collector (LY) for lead-zinc ore using N,N-dialkyl dithiocarbamate, hydrocarbyl dithiophosphate thioether ester, octanol and non-polar oil as raw materials. By adjusting the amount of each raw material, especially the ratio of octanol to non-polar oil, the inventors improved the flotation effect and zinc grade of zinc in the ore.

[0012] Specifically, the selected octanol has a certain foaming ability, and the non-polar oil can eliminate the adsorption effect of organic carbon on the collector. More importantly, after multiple experiments, the inventors found that a specific ratio of octanol and non-polar oil can improve the flotation efficiency and zinc grade of N,N-dialkyl dithiocarbamate and hydrocarbyl dithiophosphate thioether esters. However, the absence of either octanol or the addition of the non-polar oil in an inappropriate ratio does not improve the flotation efficiency and zinc grade of the zinc in the ore. This may be because the specific ratio of octanol and non-polar oil causes the N,N-dialkyl dithiocarbamate and hydrocarbyl dithiophosphate thioether esters to strongly adsorb on the zinc surface, thereby increasing the floating velocity of Zn and further enhancing the flotation efficiency and zinc grade of the zinc in the ore.

[0013] Preferably, the lead-zinc ore zinc collector, calculated by weight, comprises:

[0014] 60-80 parts of N,N-dialkyl dithiocarbamate, 10-30 parts of alkyl dithiophosphoric acid sulfide ester, 3-5 parts of octanol, and 5-10 parts of non-polar oil.

[0015] Preferably, the diesel is one or more of 10# diesel, 0# diesel, -10# diesel, -20# diesel, -35# diesel or -50# diesel.

[0016] Preferably, the octanol is one or both of primary octanol and secondary octanol.

[0017] Through multiple experiments, the inventor found that the molecular structure of octanol has an important impact on the flotation effect and zinc grade of zinc in ore by octanol and non-polar oil. Compared with bibenzyl octanol, sec-octanol has stronger activity and can better promote the adsorption of N,N-dialkyldithiocarbamate and alkyl dithiophosphate thioether ester on the surface of Zn, increase the floating speed of Zn, and enhance the flotation effect and zinc grade of zinc in ore.

[0018] A preparation method of a zinc collector for lead-zinc ore, comprising the following steps:

[0019] Mix N,N-dialkyldithiocarbamate and alkyl dithiophosphate thioether ester, add octanol and non-polar oil, and continue to mix to obtain the zinc collector (LY) for lead-zinc ore.

[0020] The preparation method of the zinc collector (LY) for lead-zinc ore has the advantages of simple operation, low cost, short production cycle, etc., can realize industrial large-scale production, and thus promote the development of the zinc industry.

[0021] Preferably, the preparation method of the zinc collector for lead-zinc ore comprises the following steps:

[0022] Mix N,N-dialkyldithiocarbamate and alkyl dithiophosphate thioether ester evenly, add octanol and non-polar oil, and stir at a speed of 300 r / min for 0.5 h to obtain the zinc collector (LY) for lead-zinc ore.

[0023] A method for flotation recovery of zinc from ore, comprising the following steps:

[0024] Add copper sulfate to the ore and stir, then add the zinc collector (LY) for lead-zinc ore, and conduct one rough selection, three scavenging selections and two cleaning selections to obtain zinc concentrate and zinc tailings.

[0025] Preferably, the method for flotation recovery of zinc from ore comprises the following steps:

[0026] Add copper sulfate to the ore and stir, then add the zinc collector (LY) for lead-zinc ore and stir to conduct one rough selection of zinc to obtain zinc rough concentrate and zinc rough tailings. Add the zinc collector (LY) for lead-zinc ore to the zinc rough tailings for the first scavenging selection of zinc to obtain zinc first scavenging concentrate and zinc first scavenging tailings. Add the zinc collector (LY) for lead-zinc ore to the zinc first scavenging tailings for the second scavenging selection of zinc to obtain zinc second scavenging concentrate and zinc second scavenging tailings. Add the zinc collector (LY) for lead-zinc ore to the zinc second scavenging tailings for the third scavenging selection of zinc to obtain zinc third scavenging concentrate and zinc tailings; No reagent is added to the zinc rough concentrate for the first cleaning selection of zinc to obtain zinc first cleaning concentrate and zinc first cleaning tailings. No reagent is added to the zinc first cleaning concentrate for the second cleaning selection of zinc to obtain zinc concentrate and zinc second cleaning tailings. The zinc scavenging concentrate and the zinc cleaning tailings are sequentially returned to the previous stage.

[0027] Preferably, the ore is lead-zinc ore or lead tailings after treatment of lead-zinc ore.

[0028] Preferably, the ore mainly comprises the following components by mass fraction:

[0029] Pb 0.1 - 10%, Zn 0.5 - 25%, S 1 - 35%.

[0030] More preferably, the ore mainly comprises the following components by mass fraction:

[0031] Pb 0.21 - 0.63%, Zn 3.85 - 16.32%, S 23.64 - 26.44%.

[0032] Preferably, the addition amount of copper sulfate is 10 - 1000 g / t.

[0033] Preferably, the addition amount of lead-zinc ore zinc collector (LY) is 5 - 500 g / t.

[0034] A method for flotation recovery of zinc from lead-zinc ore, comprising the following steps:

[0035] S1: Crushing and grinding the lead-zinc ore to -0.075 mm accounting for 65 - 85% to obtain pulp;

[0036] S2: Lead flotation: Adding zinc-sulfur inhibitor Ts to the pulp and stirring, then adding collector ZY and stirring for primary lead roughing to obtain primary lead rough concentrate and primary lead rough tailings. Adding collector ZY to the primary lead rough tailings for primary lead scavenging to obtain primary lead scavenging concentrate and primary lead scavenging tailings. Adding collector ZY to the primary lead scavenging tailings for secondary lead scavenging to obtain secondary lead scavenging concentrate and secondary lead scavenging tailings. Adding collector ZY to the secondary lead scavenging tailings for tertiary lead scavenging to obtain tertiary lead scavenging concentrate and lead tailings. Adding zinc-sulfur inhibitor Ts to the primary lead rough concentrate for primary lead cleaning to obtain primary lead cleaning concentrate and primary lead cleaning tailings. Adding zinc-sulfur inhibitor Ts to the primary lead cleaning concentrate for secondary lead cleaning to obtain secondary lead cleaning concentrate and secondary lead cleaning tailings. Adding zinc-sulfur inhibitor Ts to the secondary lead cleaning concentrate for tertiary lead cleaning to obtain lead concentrate and tertiary lead cleaning tailings. The lead scavenging concentrate and the lead cleaning tailings are sequentially returned to the previous stage;

[0037] S3: Zinc flotation: Operating the lead tailings according to the operation steps of the method for flotation recovery of zinc from the above ore to obtain zinc concentrate and zinc tailings.

[0038] Preferably, the zinc-sulfur inhibitor Ts comprises one or more of sodium carbonate, bleaching powder, sodium sulfite or zinc sulfate.

[0039] More preferably, the mass ratio of sodium carbonate, bleaching powder, sodium sulfite and zinc sulfate in the zinc-sulfur inhibitor Ts is (0-30):(0-20):(0-50):(60-90).

[0040] Preferably, the addition amount of the zinc-sulfur inhibitor Ts is 40-3000 g / t.

[0041] Preferably, the collector ZY comprises, by weight, 100-120 parts of O,O-dipropyl dithiophosphate, 100-120 parts of chloroethyl sulfide, 10-30 parts of sodium carbonate, and 50-60 parts of thiocyanate.

[0042] Preferably, the preparation method of the collector ZY is: mix O,O-dipropyl dithiophosphate and chloroethyl sulfide, add sodium carbonate aqueous solution, react at 60°C for 1 hour, cool, then add thiocyanate, react at 50°C for 0.5 hour to obtain a brown to brown-black solution, which is the collector ZY.

[0043] Preferably, the addition amount of the collector ZY is 5 to 500 g / t.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The invention uses N,N-dialkyl dithiocarbamate, alkyl dithiophosphate thioether ester, octanol and non-polar oil as raw materials, and adjusts the amount of each raw material, especially the ratio of octanol to the non-polar oil, to prepare a zinc collector (LY) for lead-zinc ore, thereby improving the flotation recovery rate and zinc grade of zinc in the ore.

[0046] In addition, the preparation method of lead-zinc ore zinc collector (LY) has the advantages of simple operation, low cost, short production cycle, etc., which can realize industrial large-scale production and promote the development of the zinc industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 The present invention is a flow chart of the method for recovering zinc by flotation of lead-zinc ore. DETAILED DESCRIPTION

[0048] The present invention is further described below with reference to the examples. These examples are intended to illustrate the present invention only and are not intended to limit the scope of the present invention. Experimental methods in the following examples where specific conditions are not specified are generally performed in accordance with conventional conditions in the art or the conditions recommended by the manufacturer; the raw materials and reagents used, unless otherwise specified, are all commercially available from conventional markets. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection claimed in the present invention.

[0049] Some of the reagents selected in the various embodiments and comparative examples of the present invention are described as follows:

[0050] The selected zinc-sulfur inhibitor Ts includes sodium carbonate, bleaching powder, sodium sulfite and zinc sulfate, and their mass ratio is 10:15:30:75.

[0051] The selected collector ZY includes, by weight, 120 parts of O,O-dipropyl dithiophosphate, 110 parts of chloroethyl sulfide, 15 parts of sodium carbonate, and 52 parts of thiocyanate. The preparation method of collector ZY is as follows: O,O-dipropyl dithiophosphate and chloroethyl sulfide are mixed, a sodium carbonate aqueous solution is added, the mixture is reacted at 60°C for 1 hour, the temperature is lowered, the thiocyanate is added, and the mixture is reacted at 50°C for 0.5 hour to obtain a brown to brown-black solution, which is collector ZY.

[0052] Example 1

[0053] This embodiment provides a lead-zinc ore zinc collector (LY), which includes, by weight, 75 parts of N,N-dialkyl dithiocarbamate, 15 parts of hydrocarbon dithiophosphate sulfide, 4 parts of secondary octanol, and 7 parts of 0# diesel.

[0054] A method for preparing a zinc collector (LY) for lead-zinc ore comprises the following steps:

[0055] Mix N,N-dialkyl dithiocarbamate and alkyl dithiophosphate sulfide, add octanol and 0# diesel, and continue mixing to obtain lead-zinc ore zinc collector (LY).

[0056] Example 2

[0057] This embodiment provides a lead-zinc ore zinc collector (LY), which includes, by weight, 60 parts of N,N-dialkyl dithiocarbamate, 10 parts of alkyl dithiophosphate thioether ester, 3 parts of secondary octanol, and 5 parts of 0# diesel.

[0058] A preparation method of a lead-zinc ore zinc collector (LY) is consistent with Example 1.

[0059] Example 3

[0060] This embodiment provides a lead-zinc ore zinc collector (LY), which includes, by weight, 80 parts of N,N-dialkyl dithiocarbamate, 30 parts of hydrocarbon dithiophosphate sulfide, 5 parts of secondary octanol, and 10 parts of 0# diesel.

[0061] A preparation method of a lead-zinc ore zinc collector (LY) is consistent with Example 1.

[0062] Example 4

[0063] This embodiment provides a lead-zinc ore zinc collector (LY), which comprises, by weight, 90 parts of N,N-dialkyl dithiocarbamate, 35 parts of hydrocarbon dithiophosphate sulfide, 6 parts of secondary octanol, and 12 parts of 0# diesel.

[0064] A preparation method of a lead-zinc ore zinc collector (LY) is consistent with Example 1.

[0065] Example 5

[0066] This embodiment provides a lead-zinc ore zinc collector (LY), which includes, by weight, 50 parts of N,N-dialkyl dithiocarbamate, 8 parts of hydrocarbon dithiophosphate sulfide, 2 parts of secondary octanol, and 3 parts of 0# diesel.

[0067] A preparation method of a lead-zinc ore zinc collector (LY) is consistent with Example 1.

[0068] Example 6

[0069] This embodiment provides a zinc collector (LY) for lead-zinc ore, using primary octanol instead of secondary octanol, and the rest is the same as in Example 1.

[0070] A method for preparing a zinc collector is consistent with Example 1.

[0071] Comparative Example 1

[0072] This comparative example provides a zinc collector, which is consistent with Example 1 except that it does not contain sec-octanol.

[0073] A method for preparing a zinc collector is consistent with Example 1.

[0074] Comparative Example 2

[0075] This comparative example provides a zinc collector, which is consistent with Example 1 except that it does not contain 0# diesel.

[0076] A method for preparing a zinc collector is consistent with Example 1.

[0077] Comparative Example 3

[0078] This comparative example provides a zinc collector, which is consistent with Example 1 except that 20 parts of octanol are used, calculated by weight.

[0079] A method for preparing a zinc collector is consistent with Example 1.

[0080] Comparative Example 4

[0081] This comparative example provides a zinc collector, which is consistent with Example 1 except that 0# diesel is 30 parts by weight.

[0082] A method for preparing a zinc collector is consistent with Example 1.

[0083] Comparative Example 5

[0084] This comparative example provides a high-sulfur copper ore collector, which, with reference to Example 1 of Chinese patent CN102806148A, comprises, by weight, 30 parts of propyl dithiophosphate sulfide propylene ester, 35 parts of thiocyanate nitrile, 20 parts of ethyl xanthate propionitrile, and 15 parts of thiocyanate.

[0085] The preparation method of the high-sulfur copper ore collector, referring to Example 1 of Chinese patent CN102806148A, comprises the following steps: adding propyl dithiophosphate sulfide propylene ester, thiocyanate, ethyl xanthate propionitrile, and thiocyanate into a stirred tank, stirring and mixing at room temperature for 1 hour to obtain the high-sulfur copper ore collector.

[0086] Example 7

[0087] This embodiment provides a method for recovering zinc by flotation of lead-zinc ore. The method flow chart is as follows: Figure 1 , including the following steps:

[0088] S1: crushing and grinding the lead-zinc ore to -0.075mm, accounting for 65-85%, to obtain slurry;

[0089] S2: Lead flotation: Add 800g / t of zinc-sulfur inhibitor Ts to the pulp and stir, then add 150g / t of collector ZY and stir to carry out a lead roughing to obtain a lead roughing concentrate and a lead roughing tailing. Add 30g / t of collector ZY to the lead roughing tailing to carry out a lead scavenging to obtain a lead scavenging concentrate and a lead scavenging tailing. Add 20g / t of collector ZY to the lead scavenging tailing to carry out a lead scavenging second ore and a lead scavenging second tailing. Add 10g / t of collector ZY to the lead scavenging tailing to carry out a lead scavenging third ore and a lead tailing. Add 200g / t of zinc-sulfur inhibitor Ts to the lead roughing concentrate to carry out a lead scavenging concentrate and a lead scavenging tailing. Add zinc-sulfur inhibitor Ts to the lead scavenging concentrate to carry out a lead scavenging concentrate and a lead scavenging tailing. 100g / t of lead is used for secondary lead concentration to obtain lead concentrate and lead tailings. 50g / t of zinc-sulfur inhibitor Ts is added to the lead concentrate to carry out tertiary lead concentration to obtain lead concentrate and lead tailings. The lead scavenging concentrate and lead tailings are returned to the previous level in sequence.

[0090] S3: Zinc flotation: Add copper sulfate to the lead tailings and stir, then add 120 g / t of the lead-zinc ore zinc collector (LY) prepared in Example 1 and stir for a primary zinc roughing. Obtain zinc roughing concentrate and zinc roughing tailings. Add 25 g / t of the lead-zinc ore zinc collector (LY) to the zinc roughing tailings for a first zinc scavenging, obtaining first zinc scavenging concentrate and first zinc scavenging tailings. Add 10 g / t of the lead-zinc ore zinc collector (LY) to the first zinc scavenging tailings for a second zinc scavenging, obtaining second zinc scavenging concentrate and second zinc scavenging tailings. Add 5 g / t of the lead-zinc ore zinc collector (LY) to the second zinc scavenging tailings for a third zinc scavenging, obtaining third zinc scavenging concentrate and zinc tailings; The zinc roughing concentrate is subjected to a first zinc cleaning without adding reagents, obtaining first zinc cleaning concentrate and first zinc cleaning tailings. The first zinc cleaning concentrate is subjected to a second zinc cleaning without adding reagents, obtaining zinc concentrate and second zinc cleaning tailings. The zinc scavenging concentrates and the zinc cleaning tailings are sequentially returned to the previous stage;

[0091] Among them, the lead-zinc ore is sourced from Yunnan Province. The grade of Pb in the lead-zinc ore is 4.43%, the grade of Zn is 15.32%, the grade of S is 25.61%, and the occupancy rate of zinc sulfide is 97.58%;

[0092] The lead tailings, calculated by mass fraction, mainly include the following components:

[0093] Pb 0.63%, Zn 16.32%, S 26.35%.

[0094] Example 8

[0095] This example provides a method for flotation recovery of zinc from lead-zinc ore. Except for using the lead-zinc ore zinc collector (LY) prepared in Example 2 to replace the lead-zinc ore zinc collector (LY) prepared in Example 1, the rest are the same as in Example 7.

[0096] Example 9

[0097] This example provides a method for flotation recovery of zinc from lead-zinc ore. Except for using the lead-zinc ore zinc collector (LY) prepared in Example 3 to replace the lead-zinc ore zinc collector (LY) prepared in Example 1, the rest are the same as in Example 7.

[0098] Example 10

[0099] This example provides a method for flotation recovery of zinc from lead-zinc ore. Except for using the lead-zinc ore zinc collector (LY) prepared in Example 4 to replace the lead-zinc ore zinc collector (LY) prepared in Example 1, the rest are the same as in Example 7.

[0100] Example 11

[0101] This embodiment provides a method for flotation recovery of zinc from lead-zinc ore. Except for using the zinc collector (LY) for lead-zinc ore prepared in Example 5 to replace the zinc collector (LY) for lead-zinc ore prepared in Example 1, the rest are the same as in Example 7.

[0102] Example 12

[0103] This embodiment provides a method for flotation recovery of zinc from lead-zinc ore. Except for using the zinc collector (LY) for lead-zinc ore prepared in Example 6 to replace the zinc collector (LY) for lead-zinc ore prepared in Example 1, the rest are the same as in Example 7.

[0104] Example 13

[0105] This embodiment provides a method for flotation recovery of zinc from lead-zinc ore. Except for lead-zinc ore and lead tailings, the rest are the same as in Example 7. Specifically:

[0106] The source of the lead-zinc ore is from Yunnan Province. The grade of Pb in the lead-zinc ore is 4.81%, the grade of Zn is 14.03%, the grade of S is 27.15%, and the occupancy rate of zinc sulfide is 96.46%.

[0107] The lead tailings, calculated by mass fraction, mainly include the following components:

[0108] Pb 0.55%, Zn 15.24%, S 26.44%.

[0109] Example 14

[0110] This embodiment provides a method for flotation recovery of zinc from lead-zinc ore. Except for lead-zinc ore and lead tailings, the rest are the same as in Example 7. Specifically:

[0111] The source of the lead-zinc ore is from Hunan Province. The grade of Pb in the lead-zinc ore is 3.08%, the grade of Zn is 5.26%, the grade of S is 24.62%, and the occupancy rate of zinc sulfide is 95.88%.

[0112] The lead tailings, calculated by mass fraction, mainly include the following components:

[0113] Pb 0.34%, Zn 5.76%, S 23.64%.

[0114] Example 15

[0115] This embodiment provides a method for flotation recovery of zinc from lead-zinc ore. Except for lead-zinc ore and lead tailings, the rest are the same as in Example 7. Specifically:

[0116] The source of the lead-zinc ore is from Guangxi Zhuang Autonomous Region. The grade of Pb in the lead-zinc ore is 2.33%, the grade of Zn is 3.26%, the grade of S is 23.18%, and the occupancy rate of zinc sulfide is 96.61%.

[0117] The lead tailings, calculated by mass fraction, mainly include the following components:

[0118] Pb 0.21%, Zn 3.85%, S 24.26%.

[0119] Comparative Example 6

[0120] This comparative example provides a method for flotation recovery of zinc from lead-zinc ore. Except that the zinc collector prepared in Comparative Example 1 is used to replace the lead-zinc ore zinc collector (LY) prepared in Example 1, the rest are the same as in Example 7.

[0121] Comparative Example 7

[0122] This comparative example provides a method for flotation recovery of zinc from lead-zinc ore. Except that the zinc collector prepared in Comparative Example 2 is used to replace the lead-zinc ore zinc collector (LY) prepared in Example 1, the rest are the same as in Example 7.

[0123] Comparative Example 8

[0124] This comparative example provides a method for flotation recovery of zinc from lead-zinc ore. Except that the zinc collector prepared in Comparative Example 3 is used to replace the lead-zinc ore zinc collector (LY) prepared in Example 1, the rest are the same as in Example 7.

[0125] Comparative Example 9

[0126] This comparative example provides a method for flotation recovery of zinc from lead-zinc ore. Except that the zinc collector prepared in Comparative Example 4 is used to replace the lead-zinc ore zinc collector (LY) prepared in Example 1, the rest are the same as in Example 7.

[0127] Comparative Example 10

[0128] This comparative example provides a method for flotation recovery of zinc from lead-zinc ore. Except that the high-sulfur copper ore collector prepared in Comparative Example 5 is used to replace the lead-zinc ore zinc collector (LY) prepared in Example 1, the rest are the same as in Example 7.

[0129] Performance test

[0130] The Zn grade and recovery rate of the zinc concentrate and zinc tailings of each example and comparative example were measured.

[0131] Table 1 Test results of each example and comparative example

[0132]

[0133] As can be seen from Table 1:

[0134] (1) By comparing Examples 7 to 11, it can be seen that the lead-zinc ore zinc collectors with different component contents in the present invention all achieve ideal zinc flotation recovery rates and zinc grades for the same lead-zinc ore.

[0135] (2) By comparing Example 7 with Examples 13 - 15, it can be seen that the zinc collector of the present invention for the same lead-zinc ore can also achieve ideal zinc flotation recovery rate and zinc grade for lead-zinc ores from different sources.

[0136] (3) By comparing Example 7 with Example 12, it can be seen that using octanols with different molecular structures will result in different zinc flotation recovery rates and zinc grades. Using secondary octanol can obtain the highest zinc flotation recovery rate and zinc grade.

[0137] (4) By comparing Example 7 with Comparative Examples 6 - 9, it can be seen that not using octanol (secondary octanol) or non-polar oil (0# diesel), as well as adding an excessive amount of octanol (secondary octanol) or non-polar oil (0# diesel) cannot achieve ideal zinc flotation recovery rate and zinc grade. That is, lacking any one of them or adding octanol and non-polar oil in an inappropriate proportion cannot improve the flotation effect and zinc grade of zinc in the ore.

[0138] (5) By comparing Example 7 with Comparative Example 10, it can be seen that compared with the collector for high-sulfur copper ore in Chinese Patent CN102806148A, the zinc collector for lead-zinc ore of the present application has a higher zinc flotation recovery rate and zinc grade.

[0139] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A zinc collector for lead-zinc ore, characterized in that, Calculated by weight parts, it includes: 50 - 90 parts of N,N-dialkyldithiocarbamate, 8 - 35 parts of hydrocarbon dithiophosphate thioether ester, 2 - 6 parts of octanol, and 3 - 12 parts of non-polar oil; The non-polar oil includes one or both of kerosene and diesel; The lead-zinc ore, calculated by mass fraction, includes the following components: 0.1 - 10% of Pb, 0.5 - 25% of Zn, and 1 - 35% of S.

2. The zinc collector for lead-zinc ore according to claim 1, wherein, Calculated by weight parts, it includes: 60 - 80 parts of N,N-dialkyldithiocarbamate, 10 - 30 parts of hydrocarbon dithiophosphate thioether ester, 3 - 5 parts of octanol, and 5 - 10 parts of non-polar oil.

3. The zinc collector for lead-zinc ore according to claim 1, wherein The diesel is one or more of 10# diesel, 0# diesel, -10# diesel, -20# diesel, -35# diesel, or -50# diesel.

4. The zinc collector for lead-zinc ore according to claim 1 or 2, characterized in that The octanol is one or both of n-octanol and sec-octanol.

5. The preparation method of the zinc collector for lead-zinc ore according to any one of claims 1 to 4, characterized in that, It includes the following steps: Mix N,N-dialkyldithiocarbamate and hydrocarbon dithiophosphate thioether ester, add octanol and non-polar oil, and continue mixing to obtain the lead-zinc ore zinc collector.

6. A method for flotation recovery of zinc from ore, characterized in that, It includes the following steps: Add copper sulfate to the ore and stir, then add the lead-zinc ore zinc collector according to any one of claims 1 - 4, and conduct one rough selection, three scavenging selections, and two cleaning selections to obtain zinc concentrate and zinc tailings.

7. The method for recovering zinc from ore flotation according to claim 6, characterized in that, It includes the following steps: Add copper sulfate to the ore and stir, then add the lead-zinc ore zinc collector and stir for one rough selection of zinc to obtain zinc rough concentrate and zinc rough tailings. Add the lead-zinc ore zinc collector to the zinc rough tailings for the first scavenging selection of zinc to obtain zinc first scavenging concentrate and zinc first scavenging tailings. Add the lead-zinc ore zinc collector to the zinc first scavenging tailings for the second scavenging selection of zinc to obtain zinc second scavenging concentrate and zinc second scavenging tailings. Add the lead-zinc ore zinc collector to the zinc second scavenging tailings for the third scavenging selection of zinc to obtain zinc third scavenging concentrate and zinc tailings; The zinc rough concentrate is subjected to the first cleaning selection of zinc without adding reagents to obtain zinc first cleaning concentrate and zinc first cleaning tailings. The zinc first cleaning concentrate is subjected to the second cleaning selection of zinc without adding reagents to obtain zinc concentrate and zinc second cleaning tailings. The zinc scavenging concentrate and the zinc cleaning tailings are sequentially returned to the previous stage.

8. The method for flotation recovery of zinc from ore according to claim 6 or 7, characterized in that, The ore is lead-zinc ore or lead tailings after the treatment of lead-zinc ore.

9. A method for flotation recovery of zinc from lead-zinc ore, characterized in that It includes the following steps: S1: Crush and grind the lead-zinc ore to -0.075mm accounting for 65 - 85% to obtain pulp; S2: Lead flotation: Add zinc-sulfur depressant Ts to the slurry and stir, then add collector ZY and stir to carry out a lead roughing to obtain lead roughing concentrate and lead roughing tailings, add collector ZY to the lead roughing tailings to carry out a lead scavenging first time to obtain lead scavenging first concentrate and lead scavenging first tailings, add collector ZY to the lead scavenging first tailings to carry out a lead scavenging second time to obtain lead scavenging second concentrate and lead scavenging second tailings, add collector ZY to the lead scavenging second tailings to carry out a lead scavenging third time, A lead scavenging three-stage concentrate and a lead tailing are obtained; zinc-sulfur inhibitor Ts is added to the lead roughing concentrate for primary lead concentration to obtain a lead concentrate and a lead tailing; zinc-sulfur inhibitor Ts is added to the lead concentrate for secondary lead concentration to obtain a lead concentrate and a lead tailing; zinc-sulfur inhibitor Ts is added to the lead concentrate for tertiary lead concentration to obtain a lead concentrate and a lead tailing; the lead scavenging concentrate and the lead tailing are returned to the previous level in sequence; S3: Zinc flotation: The lead tailings are subjected to the operating steps of the method for recovering zinc by flotation of ore according to any one of claims 6 to 8 to obtain zinc concentrate and zinc tailings.

10. The method for flotation recovery of zinc from lead-zinc ore according to claim 9, characterized in that, The zinc-sulfur inhibitor Ts includes one or more of sodium carbonate, bleaching powder, sodium sulfite or zinc sulfate; The collector ZY comprises, by weight, 100-120 parts of O,O-dipropyl dithiophosphate, 100-120 parts of chloroethyl sulfide, 10-30 parts of sodium carbonate, and 50-60 parts of thiocyanate.

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