WO2023024583A1 - 一种复杂难处理硫化铜银矿的浮选方法 - Google Patents

一种复杂难处理硫化铜银矿的浮选方法 Download PDF

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WO2023024583A1
WO2023024583A1 PCT/CN2022/092442 CN2022092442W WO2023024583A1 WO 2023024583 A1 WO2023024583 A1 WO 2023024583A1 CN 2022092442 W CN2022092442 W CN 2022092442W WO 2023024583 A1 WO2023024583 A1 WO 2023024583A1
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copper
ore
silver
sulfide
collector
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PCT/CN2022/092442
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French (fr)
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袁启东
林小凤
陈洲
刘军
伍红强
李波
王炬
张永
李亮
杨任新
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中钢集团马鞍山矿山研究总院股份有限公司
华唯金属矿产资源高效循环利用国家工程研究中心有限公司
中钢集团马鞍山矿院工程勘察设计有限公司
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Priority to ZA2023/02415A priority Critical patent/ZA202302415B/en
Publication of WO2023024583A1 publication Critical patent/WO2023024583A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/001—Flotation agents
    • B03D1/004—Organic compounds
    • B03D1/012—Organic compounds containing sulfur
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2201/00—Specified effects produced by the flotation agents
    • B03D2201/02—Collectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00—Specified materials treated by the flotation agents; specified applications
    • B03D2203/02—Ores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00—Specified materials treated by the flotation agents; specified applications
    • B03D2203/02—Ores
    • B03D2203/025—Precious metal ores
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention belongs to the technical field of non-ferrous metal beneficiation, and in particular relates to a beneficiation method of copper-silver symbiotic ore, especially a flotation method of copper-silver symbiotic ore, which is especially suitable for copper-containing grade ⁇ 0.6%, silver content ⁇ 30.0g/ t and the flotation enrichment of copper-silver ores with malachite, chalcopyrite and chalcocite as the main copper minerals.
  • copper as an important material metal in modern human society, occupies an important position in ensuring my country's economic security and plays an important role in national economic and social development.
  • the conditions of mineral resources are getting worse and worse, the rich copper ore is decreasing, the proportion of low-grade copper ore is increasing, and the copper ore resources are becoming poorer, finer and more complex.
  • copper ore Only 35% of the total reserves have a grade greater than 1%, and the national average copper ore grade is only 0.87%.
  • copper grades below 0.7% account for 56% of the total reserves. Due to the backward mining and selection technology and process, the recovery rate of copper resources in my country is low, which seriously affects the comprehensive utilization of mineral resources.
  • Silver is one of the earliest metals discovered and used by human beings. It is widely used in industries such as aerospace industry, electrical appliances and electronics. The content of silver in the earth's crust is about 1 ⁇ 10 -5 %. There are more than 100 kinds of independent silver minerals found in nature. Except for a small amount of natural silver, silver-gold ore and gold-silver ore, they are mainly silver compounds, especially in the form of sulfide Most of the ore forms. With the mining and utilization of large and medium-sized mines and the rapid consumption of high-grade silver ore, silver resources are constantly scarce, and the mining of silver resources in my country has tended to be difficult to smelt and low-grade.
  • the closed-circuit test has obtained the production indicators of copper concentrate grade of 20.17%, recovery rate of 92.39%, silver recovery rate of 87.84%, sulfur grade of sulfur concentrate of 47.37%, recovery rate of 95.23%.
  • this beneficiation process is obtained under the condition that the copper grade of the raw ore is as low as 1.04% and as high as 1.57%.
  • the copper grade in the copper concentrate is only 20.17%, the silver content is only 965.11g/t, and the enrichment ratio is low. .
  • the complex and difficult-to-treat copper-silver sulfide ores have low copper content in useful components, high content of associated precious metal silver, and complex ore components. Therefore, it is effective to use simple and low-toxic flotation agents by studying green and high-efficiency flotation processes
  • the chemical agent system forms the key technology for the green and efficient separation of complex and difficult-to-select copper-silver sulfide ores, obtains high-recovery copper concentrates, and at the same time efficiently recovers the associated gold and silver from low-grade copper ores, avoiding waste, and improving resource utilization. It is of great significance to improve the comprehensive utilization rate, meet the needs of industrial production, and promote the sustainable development of mineral resources.
  • the object of the present invention is to provide a kind of flotation method for complex and refractory copper-silver sulfide ore aiming at the problems of low copper and silver grades, low recovery rate, complicated process and environmental pollution in the copper concentrate existing in the prior art.
  • this flotation method can obtain copper grade ⁇ 24.5% , Copper-silver concentrate with copper recovery rate ⁇ 90.0%, silver grade ⁇ 1000g/t, silver recovery rate ⁇ 86.0%; For copper-silver sulfide ores dominated by chalcopyrite and chalcocite, this flotation method can obtain copper with a copper grade of ⁇ 25.0%, a copper recovery rate of ⁇ 94.0%, a silver grade of ⁇ 3000g/t, and a silver recovery rate of ⁇ 87.0%. silver concentrate.
  • the technique that the flotation method that a kind of complex refractory copper-silver ore of the present invention adopts is:
  • step (3) Concentration of copper sulfide minerals: the copper sulfide-silver mixed roughing concentrate obtained in step (2) roughing copper sulfide minerals is subjected to secondary concentration to obtain copper grade ⁇ 24.0% and copper recovery ⁇ 90.0 %, silver grade ⁇ 1000g/t, and silver recovery rate ⁇ 86.0% of the final copper-silver concentrate, the middle ore of the first selection returns to roughing, and the middle ore of the second selection returns to the first selection.
  • the amount of roughing collector MT-23 is 25-50g/t for ore feeding, and the amount of scavenging collector MT-23 for the first time is 5-15g/t for ore feeding.
  • the amount of collector MT-23 for the second sweeping is 0-15g/t ore feed; the first and second beneficiation in step (3) are both blank beneficiation.
  • thiocarbazone accounts for 55-75%
  • ethylthiocarbamate accounts for 20-40%
  • polyethylene glycol alkyl ether accounts for 5-15%.
  • step (2) the amount of roughing collector MT-23 is 30-50g/t ore feeding, and the first sweeping collector MT-23 amount is 10-15g/t ore feeding, and the second The amount of secondary sweeping collector MT-23 is 5-15g/t ore feed.
  • the grinding concentration is 60%-65%, and the generated pulp concentration is 26%-32%.
  • the thiazonitrile ester is cyanoethyl diethylaminodithiocarbamate
  • the ethylthiocarbamate is O-isopropyl-N-ethylthiocarbamate.
  • the collector MT-23 of the present invention is a high-efficiency and excellent collector for non-ferrous metal sulfide ores, and has the characteristics of strong collection capacity, high selectivity, good flotation index, high efficiency and non-toxicity.
  • the flotation effect of copper sulfide ore is good, which is conducive to improving the grade and recovery rate of copper, gold and silver.
  • the collector has both air bubble performance, no need to add additional foaming agent, and the dosage is less than that of xanthate and terpineol oil, which reduces the cost of flotation reagents.
  • the properties of each single agent in the collector are:
  • Thiazonitrile ester (ester-105): brownish black oily liquid, density 1.08 ⁇ 1.15g/cm 3 . It is used as an excellent collector for copper, lead, zinc, molybdenum, nickel and other minerals. It has good selectivity to copper ore and has a special sorting effect, and has foaming properties.
  • Ethiocarbamate No. 200: light yellow to brown oily liquid with pungent odor, density 0.99g/cm 3 . It is an excellent collector for copper sulfide, lead, zinc, molybdenum, nickel and other minerals. Thiurethane is an excellent collector for copper sulfide. It is highly efficient, non-toxic, and has good selectivity, and is widely used by countries all over the world. It also has a certain foaming performance, suitable for acidic or alkaline pulp.
  • Polyethylene glycol alkyl ether colorless liquid, foaming agent, suitable for flotation of copper ore and sulfide ore.
  • the advantage is that it is non-toxic, can be degraded by microorganisms, and will not cause environmental pollution.
  • the present invention is a complex and difficult-to-treat copper-silver sulfide flotation method, which can significantly improve the recovery rate of copper and silver on the premise of ensuring the product quality of copper-silver concentrate, and solve the problem of complex and difficult-to-treat Copper-silver sulfide ore is difficult to efficiently utilize ore dressing technical problems, and it has the following advantages:
  • (1) described collector MT-23 is the mixture of thiazonitrile ester, ethylthiocarbamate, thiazonitrile ester three, three synergy, complementary advantages, high collection efficiency to copper, silver, Good choice.
  • the collector MT-23 not only has a strong collection performance, but also has foaming properties, which can save the cost of foaming agents in production; Very low; the cost of flotation is more than 25% lower than that of the existing reagents.
  • the mineral processing process is simple, stable and reliable, and has strong applicability, and has achieved unexpected mineral processing technical indicators.
  • copper-silver ore with copper grade ⁇ 0.5%, silver content ⁇ 30.0g/t and copper minerals mainly malachite, chalcopyrite and chalcocite copper grade ⁇ 24.0%, copper recovery rate ⁇ 90.0%, silver grade ⁇ 1000g/t, silver recovery rate ⁇ 86.0% final copper-silver concentrate
  • copper grade ⁇ 0.8% silver content ⁇ 100.0g/t and copper minerals such as malachite, chalcopyrite, Chalcocite-based copper-silver sulfide raw ore can be obtained with copper grade ⁇ 25.0%, copper recovery rate ⁇ 94.0%, silver grade ⁇ 3000g/t, silver recovery rate ⁇ 87.0% final copper-silver concentrate.
  • the collector MT-23 is non-toxic, tasteless and easy to degrade. It is a green and environment-friendly collector for mineral processing and has broad prospects for promotion.
  • Fig. 1 is the principle process flow chart of the flotation method of a kind of complex refractory copper-silver sulfide ore of the present invention.
  • a kind of flotation method of complex refractory copper-silver sulfide ore of the present invention comprises the following steps:
  • a copper-silver ore contains 0.81% copper and 132.63g/t silver.
  • the metal minerals of the ore are mainly malachite, chalcopyrite, chalcocite, galena and pyrite, followed by bornite and specularite; the gangue minerals are mainly tuffaceous, followed by quartz, kaolin, green
  • the grinding concentration is 60%, the fineness of the ore grinding operation is -0.076mm, the content accounts for 75%, and the pulp is produced;

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Abstract

一种复杂难处理硫化铜银矿的浮选方法，将硫化铜银矿原矿进行破碎、磨矿作业，产生矿浆，向矿浆中加入预定量的捕收剂MT-23进行硫化铜银矿的粗选，获得硫化铜银混合粗选精矿和粗选尾矿，粗选尾矿加入捕收剂MT-23进行硫化铜银矿物的混合扫选；将硫化铜矿物粗选获得的硫化铜银混合粗选精矿进行二次精选，得到最终铜银精矿；捕收剂MT-23是硫氮腈酯、乙硫氨酯、聚乙二醇烷基醚三者的混合物。在保证铜银精矿产品质量的前提下，显著提高铜和银的回收率，具有工艺流程简单、稳定可靠、适用性强，且药剂制度简单、药剂用量小、加药方便，解决了复杂难处理硫化铜银矿难以高效利用的选矿技术难题。

Description

一种复杂难处理硫化铜银矿的浮选方法 技术领域
本发明属于有色金属选矿技术领域，具体涉及一种铜银共生矿的选矿方法，尤其涉及一种铜银共生矿的浮选方法，特别适合于含铜品位≥0.6％、银含量≥30.0g/t且铜矿物以孔雀石、黄铜矿、辉铜矿为主的铜银矿石的浮选富集。
背景技术
目前，铜作为现代人类社会重要材料金属，在保障我国经济安全方面占有重要的地位，在国民经济和社会发展中发挥着重要作用。随着我国矿石资源的不断开发利用，矿产资源条件越来越恶化，富铜矿日益减少，低品位铜矿占比日益增大，铜矿资源日趋贫、细、杂化，其中，铜矿石品位大于1％的仅占总储量的35％，全国铜矿石平均品位只有0.87％，在全国已探明的铜资源中，含铜品位在0.7％以下的占总储量的56％。由于采选技术及工艺落后，造成我国铜资源回收率较低，严重影响矿产资源的综合利用。
银是人类发现和使用的最早的金属之一，广泛应用于航天工业、电器和电子等工业。银在地壳中的含量约为1×10 -5％，自然界发现的独立银矿物有100余种，除少量自然银、银金矿和金银矿除外，主要为银的化合物，尤其是以硫化矿形态居多。随着大中型矿山的开采利用、高品位银矿石的快速消耗，银资源不断匮乏，我国银资源开采已趋向于难选冶、低品位。
《现代矿业》杂志2019年第11期发表的“某高硫复杂铜银矿选矿试验研究”，针对某高硫复杂铜银矿采用常规高强碱、丁铵、黄药法浮选方案选别指标差的情况，在弱碱、强碱条件下进行粗选对比条件试验，采用弱碱性组合黄铁矿抑制剂方案可大幅度提高铜银精矿指标。闭路试验获得了铜精矿铜品位20.17％、回收率92.39％，银回收 率87.84％，硫精矿硫品位47.37％、回收率95.23％的生产指标。但该选矿工艺是在原矿铜品位最低1.04％、最高1.57％的富含铜情况下获得的，且铜精矿中铜品位仅为20.17％、银含量仅为965.11g/t，富集比低。
《有色矿冶》2017年第1期发表的“国外某铜矿的选矿工艺研究”，针对原矿铜品位1.67％、银含量40g/t的国外某铜矿石，通过采用组合捕收剂和组合抑制剂，原矿经过二次粗选、二次扫选、三次精选，最终获得了铜品位24.05％、铜回收率87.14％，银品位658.37g/t，银回收率78.87％的较好浮选指标。该选矿工艺获得的铜精矿品位较高，但银的富集比仍然较低、回收率不到79.0％，且药剂制度也较为复杂，药剂气味大，对环境造成一定污染。
复杂难处理硫化铜银矿石中有用组分铜含量低，伴生贵金属银含量较高，矿石成分较复杂，因此，通过研究绿色高效浮选工艺，使用简单、低毒的浮选药剂，行之有效的药剂制度，形成复杂难选硫化铜银矿的绿色高效选别关键技术，获得高回收率的铜精矿，同时高效回收低品位铜矿伴生金银，避免浪费现象的发生，对提高资源的综合利用率，满足工业生产的需求，促进矿产资源的可持续发展具有重要的意义。
发明内容
本发明的目的就是针对现有技术中存在的铜精矿中铜、银品位低、回收率低、工艺复杂、污染环境等问题，而提供一种复杂难处理硫化铜银矿的浮选方法。对于含铜品位≥0.6％、银含量≥30.0g/t且铜矿物以孔雀石、黄铜矿、辉铜矿为主的硫化铜银矿石，采用该浮选方法可以获得铜品位≥24.5％、铜回收率≥90.0％、银品位≥1000g/t、银回收率≥86.0％的铜银精矿；对于含铜品位≥0.8％、银含量≥100.0g/t且铜矿物以孔雀石、黄铜矿、辉铜矿为主的硫化铜银矿石， 采用该浮选方法可以获得铜品位≥25.0％、铜回收率≥94.0％、银品位≥3000g/t、银回收率≥87.0％的铜银精矿。
为实现本发明的上述目的，本发明一种复杂难处理硫化铜银矿的浮选方法采用的工艺为：
(1)矿石预处理：将含铜品位≥0.5％、银含量≥30.0g/t且铜矿物以孔雀石、黄铜矿、辉铜矿为主的硫化铜银矿原矿进行破碎、磨矿作业，产生矿浆；磨矿作业的细度控制为-0.076mm含量占45％-95％,根据矿物堪布粒度，细度控制一般以-0.076mm含量占65％-85％为优。
(2)硫化铜矿物粗选：向步骤(1)预处理得到的矿浆中加入预定量的捕收剂MT-23进行硫化铜银矿的粗选，获得硫化铜银混合粗选精矿和粗选尾矿，粗选尾矿加入捕收剂MT-23进行硫化铜银矿物的混合扫选，扫选次数为二次，第一次扫选精矿返回粗选，第二次扫选精矿返回第一次扫选；所述的捕收剂MT-23是硫氮腈酯、乙硫氨酯、硫氮腈酯三者的混合物；
(3)硫化铜矿物的精选：将步骤(2)硫化铜矿物粗选获得的硫化铜银混合粗选精矿进行二次精选，得到铜品位≥24.0％、铜回收率≥90.0％、银品位≥1000g/t、银回收率≥86.0％的最终铜银精矿，第一次精选中矿返回粗选，第二次精选中矿返回第一次精选。
对于含铜品位≥0.8％、银含量≥100.0g/t且铜矿物以孔雀石、黄铜矿、辉铜矿为主的硫化铜银矿原矿，按照上述步骤(1)、(2)、(3)，可以得到铜品位≥25.0％、铜回收率≥94.0％、银品位≥3000g/t、银回收率≥87.0％的最终铜银精矿。
优选的，在步骤(2)中，粗选捕收剂MT-23用量为25-50g/t给矿，第一次扫选捕收剂MT-23用量为5-15g/t给矿，第二次扫选捕收剂MT-23用量为0-15g/t给矿；步骤(3)中一次精选、二次精选皆为空白精选。
优选的，所述的捕收剂MT-23中，硫氮腈酯占比55～75％，乙硫氨酯占比20～40％，聚乙二醇烷基醚占比5～15％。
进一步地，步骤(2)中，粗选捕收剂MT-23用量为30-50g/t给矿，第一次扫选捕收剂MT-23用量为10-15g/t给矿，第二次扫选捕收剂MT-23用量为5-15g/t给矿。
进一步地，在步骤(1)矿石预处理作业中，磨矿浓度为60％-65％，产生的矿浆浓度为26％-32％。
进一步地，所述的硫氮腈酯为二乙胺基二硫代甲酸氰乙酯，所述的乙硫氨酯为O-异丙基-N-乙基硫代氨基甲酸酯。
本发明捕收剂MT-23为有色金属硫化矿的高效优良捕收剂，具有捕收能力强、选择性高、浮选指标好、高效无毒等特点。浮选硫化铜矿效果好，有利于提高铜、金和银的品位及回收率。该捕收剂兼气泡性能，不需额外添加起泡剂，用量比黄药、松醇油少，降低浮选药剂成本。捕收剂中各单一药剂性能为：
硫氮腈酯(酯-105)：棕黑色油状液体，密度1.08～1.15g/cm 3。用作铜、铅、锌、钼、镍等矿物的优良捕收剂，对铜矿选择性好并且具有特殊的分选效果，并兼有起泡性。
乙硫氨酯(200号)：浅黄色至褐色油状液体，有刺激性气味，密度0.99g/cm 3。是硫化铜、铅、锌、钼、镍等矿物的优良捕收剂。硫氨酯是硫化铜的优良捕收剂，它以高效无毒，并具有良好的选择性，而被世界各国广泛应用。它本身还具有一定的起泡性能，适用于酸性或碱性矿浆。
聚乙二醇烷基醚：无色液体，起泡剂，适用于浮选铜矿及硫化矿。优点是无毒，可微生物降解，不会造成环境污染。
与现有技术相比，本发明一种复杂难处理硫化铜银矿的浮选方法，可在保证铜银精矿产品质量的前提下，显著提高铜和银的回收率，解 决了复杂难处理硫化铜银矿难以高效利用的选矿技术难题，具体具有如下优点：
(1)所述的捕收剂MT-23是硫氮腈酯、乙硫氨酯、硫氮腈酯三者的混合物，三者协同作用、优势互补，对铜、银的捕收效率高，选择性好。
(2)仅采用单一捕收剂MT-23，药剂制度简单，加药方便，便于精准控制加药量。
(3)捕收剂MT-23不仅具有很强的捕收性能，且具有起泡性，生产上可以节省起泡剂的费用；由于捕收剂MT-23能力强，吨矿药剂总消耗量极低；浮选成本比现有使用的药剂节约25％以上。
(4)选矿工艺流程简单，稳定可靠，适用性强，并取得了意想不到的选矿技术指标。对于含铜品位≥0.5％、银含量≥30.0g/t且铜矿物以孔雀石、黄铜矿、辉铜矿为主的硫化铜银矿，可以得到铜品位≥24.0％、铜回收率≥90.0％、银品位≥1000g/t、银回收率≥86.0％的最终铜银精矿；对于含铜品位≥0.8％、银含量≥100.0g/t且铜矿物以孔雀石、黄铜矿、辉铜矿为主的硫化铜银矿原矿，可以得到铜品位≥25.0％、铜回收率≥94.0％、银品位≥3000g/t、银回收率≥87.0％的最终铜银精矿。
(5)捕收剂MT-23无毒、无味、易降解，属于绿色、环保类选矿捕收剂，推广前景广阔。
附图说明
图1为本发明一种复杂难处理硫化铜银矿的浮选方法的原则工艺流程图。
具体实施方式
为描述本发明，下面结合附图和实施例对本发明一种复杂难处理硫化铜银矿的浮选方法做进一步详细说明，当然，所描述的实施例仅仅是发明一部分实施例，而不是全部的实施例。
实施案例
本发明一种复杂难处理硫化铜银矿的浮选方法，包括以下步骤：
(1)预处理：某铜银矿石中含铜0.81％、银132.63g/t，矿物种类较多，矿物组成较复杂，铜、银是主要的有价成分。矿石的金属矿物主要为孔雀石、黄铜矿、辉铜矿、方铅矿、黄铁矿，次为斑铜矿、镜铁矿；脉石矿物主要为凝灰质，次为石英和高岭土、绿泥石及粘土类矿物，在磨矿浓度为60％的情况下，对矿石进行磨矿作业的细度为-0.076mm含量占75％，产生矿浆；
(2)硫化铜矿物粗选：向步骤(1)预处理得到的矿浆中加入捕收剂MT-23进行硫化铜银矿的粗选，获得硫化铜银混合粗选精矿和粗选尾矿，粗选尾矿加入捕收剂MT-23进行硫化铜银矿物的混合扫选，扫选次数为二次，粗选捕收剂MT-23用量为30g/t，浮选浓度30％，第一次扫选捕收剂MT-23用量为15g/t，第二次扫选捕收剂MT-23用量为15g/t，得到最终尾矿，第一次扫选精矿返回粗选，第二次扫选精矿返回第一次扫选；
(3)硫化铜矿物的精选：将步骤(2)硫化铜矿物粗选作业中硫化铜银混合粗选精矿进行二次精选，得到最终精矿，第一次精选中矿返回粗选，第二次精选中矿返回第一次精选。
选矿试验结果如下表所示，浮选试验指标(wt％)
Figure PCTCN2022092442-appb-000001
(注：表中Ag指克/吨原矿)
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在发明揭露的技术 范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。

Claims (7)

  1. 一种复杂难处理硫化铜银矿的浮选方法，其特征在于采用以下工艺：
    (1)矿石预处理：将含铜品位≥0.5％、银含量≥30.0g/t且铜矿物以孔雀石、黄铜矿、辉铜矿为主的硫化铜银矿原矿进行破碎、磨矿作业，产生矿浆；磨矿作业的细度控制为-0.076mm含量占45％-95％；
    (2)硫化铜矿物粗选：向步骤(1)预处理得到的矿浆中加入预定量的捕收剂MT-23进行硫化铜银矿的粗选，获得硫化铜银混合粗选精矿和粗选尾矿，粗选尾矿加入捕收剂MT-23进行硫化铜银矿物的混合扫选，扫选次数为二次，第一次扫选精矿返回粗选，第二次扫选精矿返回第一次扫选；所述的捕收剂MT-23是硫氮腈酯、乙硫氨酯、硫氮腈酯三者的混合物；
    (3)硫化铜矿物的精选：将步骤(2)硫化铜矿物粗选获得的硫化铜银混合粗选精矿进行二次精选，得到铜品位≥24.5％、铜回收率≥90.0％、银品位≥1000g/t、银回收率≥86.0％的最终铜银精矿，第一次精选中矿返回粗选，第二次精选中矿返回第一次精选。
  2. 一种复杂难处理硫化铜银矿的浮选方法，其特征在于采用以下工艺：
    (1)矿石预处理：将含铜品位≥0.8％、银含量≥100.0g/t且铜矿物以孔雀石、黄铜矿、辉铜矿为主的硫化铜银矿原矿进行破碎、磨矿作业，产生矿浆；磨矿作业的细度控制为-0.076mm含量占45％-95％；
    (2)硫化铜矿物粗选：向步骤(1)预处理得到的矿浆中加入预定量的捕收剂MT-23进行硫化铜银矿的粗选，获得硫化铜银混合粗选精矿和粗选尾矿，粗选尾矿加入捕收剂MT-23进行硫化铜银矿物的混合扫选，扫选次数为二次，第一次扫选精矿返回粗选，第二次扫选精矿返回第一次扫选；所述的捕收剂MT-23是硫氮腈酯、乙硫氨酯、硫氮腈酯三者的混合物；
    (3)硫化铜矿物的精选：将步骤(2)硫化铜矿物粗选获得的硫化铜银混合粗选精矿进行二次精选，得到铜品位≥25.0％、铜回收率≥94.0％、银品位≥3000g/t、银回收率≥87.0％的最终铜银精矿，第一次精选中矿返回粗选，第二次精选中矿返回第一次精选。
  3. 如权利要求1或2所述的一种复杂难处理硫化铜银矿的浮选方法，其特征在于：步骤(2)中，粗选捕收剂MT-23用量为25-50g/t给矿，第一次扫选捕收剂MT-23用量为5-15g/t给矿，第二次扫选捕收剂MT-23用量为0-15g/t给矿；步骤(3)中一次精选、二次精选皆为空白精选。
  4. 如权利要求3所述的一种复杂难处理硫化铜银矿的浮选方法，其特征在于：所述的捕收剂MT-23中，硫氮腈酯占比55～75％，乙硫氨酯占比20～40％，聚乙二醇烷基醚占比5～15％。
  5. 如权利要求4所述的一种复杂难处理硫化铜银矿的浮选方法，其特征在于：步骤(2)中，粗选捕收剂MT-23用量为30-50g/t给矿，第一次扫选捕收剂MT-23用量为10-15g/t给矿，第二次扫选捕收剂MT-23用量为5-15g/t给矿。
  6. 如权利要求5所述的一种复杂难处理硫化铜银矿的浮选方法，其特征在于：在步骤(1)矿石预处理作业中，磨矿浓度为60％-65％，产生的矿浆浓度为26％-32％。
  7. 如权利要求6所述的一种复杂难处理硫化铜银矿的浮选方法，其特征在于：所述的硫氮腈酯为二乙胺基二硫代甲酸氰乙酯，所述的乙硫氨酯为O-异丙基-N-乙基硫代氨基甲酸酯。
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