CN116328952A - Mineral separation method for recovering tungsten tin sulfide from polymetallic tungsten ore tailings - Google Patents
Mineral separation method for recovering tungsten tin sulfide from polymetallic tungsten ore tailingsDownload PDFInfo
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及一种多金属钨矿尾矿的回收方法，特别涉及一种从多金属钨矿尾矿中回收钨锡硫的选矿方法，属于选矿技术领域。The invention relates to a method for recovering polymetallic tungsten ore tailings, in particular to an ore dressing method for recovering tungsten, tin and sulfur from polymetallic tungsten ore tailings, and belongs to the technical field of ore dressing.
背景技术Background technique
矿产资源逐步枯竭，从现有选厂的堆存尾矿中再选，进一步从中获取有价金属资源意义重大。目前，多金属钨矿尾矿中仍赋存大量金属资源，包括钨、锡、硫等，如下：Mineral resources are gradually depleted, and it is of great significance to further obtain valuable metal resources from the stockpiled tailings of existing concentrators. At present, there are still a large number of metal resources in the tailings of polymetallic tungsten mines, including tungsten, tin, sulfur, etc., as follows:
黑白钨矿：目前的钨矿山中，无论是单一白钨矿还是黑白钨混合矿，广泛采用的浮选工艺均为脂肪酸法，如河南洛阳钼业集团白钨矿、甘肃小柳沟白钨矿江西香炉山钨矿。脂肪酸类对白钨矿的捕收能力强，但选择性较差，因此，脂肪酸浮选工艺中往往需要添加大量的水玻璃作为脉石矿物抑制剂。矿物组成复杂时，水玻璃的选择性往往较差，在抑制方解石和萤石等脉石矿物的同时对钨矿物的浮选产生影响，因此，钨尾矿中含有在主干流程未上浮的钨。Black and white tungsten ore: In the current tungsten mines, whether it is single scheelite or black and white tungsten mixed ore, the widely used flotation process is fatty acid method, such as Henan Luoyang Molybdenum Industry Group scheelite mine, Gansu Xiaoliugou scheelite mine in Jiangxi Xianglushan Tungsten Mine. Fatty acids have a strong ability to collect scheelite, but their selectivity is poor. Therefore, it is often necessary to add a large amount of water glass as a gangue mineral inhibitor in the fatty acid flotation process. When the mineral composition is complex, the selectivity of water glass is often poor, which affects the flotation of tungsten minerals while suppressing gangue minerals such as calcite and fluorite. Therefore, tungsten tailings contain tungsten that has not been floated in the main process.
锡资源：此外，由于地球化学成矿作用中W、Sn具有相近的分异行为和亲和性(成矿地球化学，地质出版社，2015，134-135)，因此大量多金属钨矿中均赋存了锡石资源，例如黄沙坪、柿竹园等钨矿，而锡石在现有的钨矿选矿工艺中并未得到有效回收，主要保留在选钨尾矿中。基于以往的钨冶炼的方法主要是“盐酸分解后碱溶”的方法，钨精矿中的锡会随钨一起进入浸出液中，导致后续分离困难，因此，按照以往的钨精矿标准YS/T 231-2015，要求钨精矿中的锡品位要低至0.15～0.50之间。近些年来，随着“硫磷混酸协同浸出技术”(专利CN104878223A)、“铵盐体系白钨绿色冶炼关键技术”(专利CN109439929A)等钨冶炼新技术的开发，可以使得钨精矿在浸出钨过程中的锡进入到渣相中，实现高值化利用。因此，实现多金属钨矿尾矿中锡石和钨的共富集回收，具有重大意义。Tin resources: In addition, due to the similar differentiation behavior and affinity of W and Sn in geochemical mineralization (Mineralization Geochemistry, Geological Press, 2015, 134-135), a large number of polymetallic tungsten deposits are evenly distributed. There are cassiterite resources, such as tungsten mines such as Huangshaping and Shizhuyuan, but cassiterite has not been effectively recovered in the existing tungsten ore beneficiation process, and is mainly retained in the tungsten beneficiation tailings. Based on the previous method of tungsten smelting is mainly the method of "alkali dissolution after hydrochloric acid decomposition", the tin in the tungsten concentrate will enter the leaching solution together with the tungsten, resulting in difficulty in subsequent separation. Therefore, according to the previous tungsten concentrate standard YS/T 231-2015, the tin grade in tungsten concentrate is required to be as low as 0.15-0.50. In recent years, with the development of new tungsten smelting technologies such as "Sulphur-Phosphorus Mixed Acid Cooperative Leaching Technology" (patent CN104878223A), "Key Technology for Green Scheelite Smelting in Ammonium Salt System" (patent CN109439929A), it is possible to make tungsten concentrate leaching tungsten The tin in the process enters the slag phase to realize high-value utilization. Therefore, it is of great significance to realize the co-enrichment and recovery of cassiterite and tungsten in polymetallic tungsten mine tailings.
硫化矿：现有技术中常见的多金属钨矿的选矿流程包括：磁选除铁、浮选脱硫和钨浮选工序，该选矿流程中，全硫浮选工序中易浮的硫化矿绝大部分被回收。但是部分磁黄铁矿及黄铁矿的可浮性较差，难以在常规全硫浮选段被完全回收，特别是当矿石氧化程度高时，其可浮性进一步下降，导致这部分未脱除的硫化矿随矿浆进入尾矿，造成这部分硫资源的流失。Sulfide ore: The beneficiation process of polymetallic tungsten ore common in the prior art includes: magnetic separation iron removal, flotation desulfurization and tungsten flotation process. Some are recycled. However, the floatability of some pyrrhotite and pyrite is poor, and it is difficult to be completely recovered in the conventional full-sulfur flotation section. Especially when the ore is highly oxidized, its floatability will further decrease, resulting in this The removed sulfide ore enters the tailings with the slurry, causing the loss of this part of sulfur resources.
大多数多金属钨矿尾矿中主要有用组分为WO3、S和Fe，主要金属矿物为白钨矿、锡石、磁黄铁矿和黄铁矿，脉石矿物以长石、萤石、石英、辉石、方解石和石榴子石为主。其中，WO3含量0.07～0.25％，S含量2～3％，TFe 8～12％。现有的多金属钨矿尾矿绝大多数堆存于尾矿库，综合利用度较低。针对这一情况选矿工作者大多从解决尾矿库的压力出发，研究尾矿的大宗利用和消纳，回收萤石、长石、石英等非金属矿物，其中萤石主要作为氢氟酸的制备原料，而石英长石作为无机材料用于建材行业。目前关于钨多金属矿山尾矿中金属矿物的回收多数集中在采用与主干流程相同的工艺进行尾矿再选，碍于经济效益和生产成本等问题，大多数停留在实验室阶段，鲜见规模化的应用。The main useful components in most polymetallic tungsten ore tailings are WO3 , S and Fe, the main metal minerals are scheelite, cassiterite, pyrrhotite and pyrite, and the gangue minerals are feldspar and fluorite , quartz, pyroxene, calcite and garnet. Among them, the content of WO3 is 0.07-0.25%, the content of S is 2-3%, and the content of TFe is 8-12%. Most of the existing polymetallic tungsten ore tailings are stored in tailings ponds, and the comprehensive utilization is low. In response to this situation, most ore dressing workers start from solving the pressure of tailings ponds, study the bulk utilization and consumption of tailings, and recover non-metallic minerals such as fluorspar, feldspar, and quartz, among which fluorite is mainly used for the preparation of hydrofluoric acid raw materials, while quartz feldspar is used as an inorganic material in the building materials industry. At present, most of the recovery of metal minerals in the tailings of tungsten polymetallic mines is concentrated on the tailings re-selection using the same process as the main process. Due to economic benefits and production costs, most of them stay in the laboratory stage, and the scale is rarely seen. application.
发明内容Contents of the invention
针对现有技术对多金属钨矿尾矿处理的方法存在的缺陷，本发明的目的是在于提供一种从多金属钨矿尾矿中回收钨锡硫的选矿方法，该方法基于混合浮选将多金属钨矿尾矿中的硫化矿、钨矿物以及锡石实现初步共富集，再通过反浮选脱硫方法将硫化矿单独作为硫化矿精矿高效分离，而钨矿和锡石以钨锡混合精矿高效回收，真正实现了多金属钨矿尾矿的资源化回收。Aiming at the defects in the prior art methods for treating polymetallic tungsten ore tailings, the purpose of the present invention is to provide a beneficiation method for recovering tungsten, tin and sulfur from polymetallic tungsten ore tailings, which is based on mixed flotation The sulfide ore, tungsten mineral and cassiterite in polymetallic tungsten ore tailings are initially co-enriched, and then the sulfide ore is separated as a sulfide ore concentrate by reverse flotation desulfurization method, while tungsten ore and cassiterite are separated by tungsten and tin The efficient recovery of mixed concentrates has truly realized the resource recovery of polymetallic tungsten ore tailings.
为了实现上述技术目的，本发明提供了一种从多金属钨矿尾矿中回收钨锡硫的选矿方法，该方法是将多金属钨矿尾矿经过调浆后，以金属离子-羟肟酸类配合物作为捕收剂I，硫酸铝、水玻璃和氟硅酸钠组合物作为抑制剂I，进行混合浮选，得到钨锡硫混合精矿；所述钨锡硫混合精矿以草酸作为活化剂，黄药作为捕收剂II，单一水玻璃作为抑制剂II，进行反浮选脱硫，精矿为硫精矿，尾矿为钨锡混合精矿。In order to achieve the above technical purpose, the present invention provides a mineral processing method for recovering tungsten-tin-sulfur from polymetallic tungsten ore tailings. Class complexes are used as collector I, aluminum sulfate, water glass and sodium fluorosilicate composition are used as inhibitor I, carry out mixed flotation, obtain tungsten-tin-sulfur mixed concentrate; described tungsten-tin-sulfur mixed concentrate is oxalic acid as Activator, xanthate as collector II, single water glass as inhibitor II, carry out reverse flotation desulfurization, the concentrate is sulfur concentrate, and the tailings are tungsten-tin mixed concentrate.
本发明技术方案根据多金属钨矿尾矿的矿物组成及赋存状态等特点(主要金属矿物为白钨矿、锡石、磁黄铁矿和黄铁矿，脉石矿物以长石、萤石、石英、辉石、方解石和石榴子石为主)，在采用特殊硫酸铝、水玻璃和氟硅酸钠的组合抑制剂作用下，能够同时高效抑制萤石、方解石等含钙脉石和石榴子石、石英、长石等硅酸盐脉石，且以金属离子-羟肟酸配合物作为捕收剂，能够将钨矿物、锡石和硫化矿同时高效富集，以混合精矿形式回收，再以草酸活化，黄药作为捕收剂，以单一水玻璃作为抑制剂抑制黑白钨矿和锡石，进行反浮选脱硫，而钨矿和锡石保留在尾矿中，最终实现多金属钨矿尾矿中钨锡硫的综合回收。The technical scheme of the present invention is based on the characteristics of the mineral composition and occurrence state of polymetallic tungsten ore tailings (the main metal minerals are scheelite, cassiterite, pyrrhotite and pyrite, and the gangue minerals are feldspar and fluorite. , quartz, pyroxene, calcite and garnet), under the combined inhibitor of special aluminum sulfate, water glass and sodium fluorosilicate, it can effectively inhibit calcium-containing gangue and pomegranate such as fluorite and calcite at the same time Silicate gangues such as quartz, feldspar, etc., and metal ion-hydroxamic acid complexes are used as collectors, which can efficiently enrich tungsten minerals, cassiterite and sulfide ores at the same time, recover them in the form of mixed concentrates, and then Activation with oxalic acid, xanthate as a collector, single water glass as an inhibitor to suppress black and white tungsten ore and cassiterite, and perform reverse flotation desulfurization, while tungsten ore and cassiterite are retained in the tailings, and finally realize polymetallic tungsten ore Comprehensive recovery of tungsten, tin and sulfur in tailings.
作为一个优选的方案，所述调浆以调节矿浆质量百分比浓度为38％～45％，pH在9.5～10.5范围内。在优选的pH条件下，有利于提高金属离子-羟肟酸类配合物的捕收能力。As a preferred solution, the slurry adjustment is to adjust the mass percentage concentration of the pulp to be 38%-45%, and the pH is within the range of 9.5-10.5. Under the optimal pH condition, it is beneficial to improve the collection capacity of the metal ion-hydroxamic acid complex.
作为一个优选的方案，所述捕收剂I为羟肟酸类配体与金属离子配位形成的金属离子-羟肟酸类配合物。所述金属离子为Fe3+、Fe2+、Pb2+、Cu2+、Zn2+、Al3+、Mn2+、Ni2+或Ca2+；进一步优选的金属离子为Fe3+、Fe2+或Pb2+。所述羟肟酸类配体为水杨羟肟酸、苯甲羟肟酸、萘基羟肟酸或C6～C12的烷基羟肟酸。所述金属离子与羟肟酸类配体的摩尔比为1:1～16；进一步优选为1:1～8。As a preferred solution, the collector I is a metal ion-hydroxamic acid complex formed by coordination of hydroxamic acid ligands and metal ions. The metal ion is Fe3+ , Fe2+ , Pb2+ , Cu2+ , Zn2+ , Al3+ , Mn2+ , Ni2+ or Ca2+ ; a further preferred metal ion is Fe3+ , Fe2+ or Pb2+ . The hydroxamic acid ligand is salicylic hydroxamic acid, benzyl hydroxamic acid, naphthyl hydroxamic acid or C6 -C12 alkyl hydroxamic acid. The molar ratio of the metal ion to the hydroxamic acid ligand is 1:1-16; more preferably 1:1-8.
作为一个优选的方案，所述抑制剂I由硫酸铝、水玻璃和氟硅酸钠按照质量比1:2～4:2～4组成。在硫酸铝、水玻璃和氟硅酸钠这三种药剂的协同作用下，硫酸铝和水玻璃主要形成的Al-SiO3胶粒，对方解石、萤石等含钙脉石矿物具有很强的选择性抑制能力，并且对黑白钨矿、锡石以及硫化矿的回收率影响较小，氟硅酸钠主要用于选择性抑制硅酸盐矿物并分散矿泥避免夹带；此外，硫酸铝和氟硅酸钠在水溶液中均能够提供酸性环境，还有助于高选择性硅酸胶粒的形成；硫酸铝占比须适中，过高会导致抑制能力不足，而过低则选择性下降，易导致钨锡矿物回收率降低。As a preferred solution, the inhibitor I is composed of aluminum sulfate, water glass and sodium fluorosilicate in a mass ratio of 1:2-4:2-4. Under the synergistic effect of aluminum sulfate, water glass and sodium fluorosilicate, the Al-SiO3 colloidal particles mainly formed by aluminum sulfate and water glass have strong resistance to calcium-containing gangue minerals such as calcite and fluorite. Selective inhibition ability, and has little effect on the recovery rate of black and white tungsten ore, cassiterite and sulfide ore, sodium fluorosilicate is mainly used to selectively inhibit silicate minerals and disperse slime to avoid entrainment; in addition, aluminum sulfate and fluorine Sodium silicate can provide an acidic environment in aqueous solution, and also contribute to the formation of highly selective silicic acid colloidal particles; the proportion of aluminum sulfate must be moderate, too high will lead to insufficient inhibitory ability, while too low will result in decreased selectivity and easy Lead to lower recovery rate of tungsten tin minerals.
作为一个优选的方案，所述浮选包括一次粗选、2～4次精选和1～3次扫选。As a preferred solution, the flotation includes one roughing, 2-4 refining and 1-3 sweeping.
作为一个优选的方案，所述混合浮选的粗选药剂制度为：捕收剂I300～800g/t；抑制剂I 200～600g/t，起泡剂10～50g/t；所述起泡剂为2#油。As a preferred solution, the roughing agent system of the mixed flotation is: collector I 300-800g/t; inhibitor I 200-600g/t, foaming agent 10-50g/t; the foaming agent It is 2# oil.
作为一个优选的方案，所述混合浮选的精选药剂制度为：抑制剂I 100～200g/t。As a preferred solution, the selected agent system for the mixed flotation is: inhibitor I 100-200g/t.
作为一个优选的方案，所述混合浮选的扫选为空白扫选，不需要添加药剂。As a preferred solution, the sweeping of the mixed flotation is blank sweeping, without adding reagents.
作为一个优选的方案，所述反浮选包括一次粗选、1～3次精选和1～3次扫选。As a preferred solution, the reverse flotation includes one roughing, 1-3 refining and 1-3 sweeping.
作为一个较优选的方案，所述反浮选的粗选药剂制度为：活化剂100～500g/t；捕收剂II 300～600g/t；抑制剂II 500～3000g/t，抑制剂II进一步优选为1500～3000g/t，起泡剂10～50g/t；所述起泡剂为2#油.As a more preferred solution, the roughing reagent system for reverse flotation is: activator 100-500g/t; collector II 300-600g/t; inhibitor II 500-3000g/t, inhibitor II further Preferably 1500-3000g/t, foaming agent 10-50g/t; the foaming agent is 2# oil.
作为一个较优选的方案，所述反浮选的精选为空白精选，不添加浮选药剂。As a more preferred solution, the concentrating of the reverse flotation is blank concentrating, without adding flotation reagents.
作为一个较优选的方案，所述反浮选的扫选药剂制度为：起泡剂10～20g/t。扫选过程不添加捕收剂。As a more preferred solution, the scavenging agent system of the reverse flotation is: foaming agent 10-20g/t. The sweeping process does not add collectors.
相对现有技术，本发明技术方案带来的有益技术效果：Compared with the prior art, the beneficial technical effect brought by the technical solution of the present invention:
本发明技术方案对多金属钨矿尾矿中的硫化矿、钨矿以及锡石实现初步富集，再通过反浮选脱硫方法将硫化矿(主要是黄铁矿和磁黄铁矿)单独作为硫精矿高效回收，硫回收率可以达到67％左右，而钨矿和锡石以钨锡混合精矿高效回收WO3回收率可以达到70％左右，Sn回收率可以达到45％左右，真正实现了多金属钨矿尾矿的资源化回收。The technical scheme of the present invention realizes preliminary enrichment of sulfide ore, tungsten ore and cassiterite in polymetallic tungsten ore tailings, and then the sulfide ore (mainly pyrite and pyrrhotite) is separately used as Sulfur concentrate is efficiently recovered, and the sulfur recovery rate can reach about 67%, while tungsten ore and cassiterite are efficiently recovered with tungsten-tin mixed concentrate, and the recovery rate ofWO3 can reach about 70%, and the recovery rate of Sn can reach about 45%. Recycling of polymetallic tungsten ore tailings.
本发明的技术方案对多金属钨矿尾矿的选矿方法操作简单，药剂成本低，适应于各种多金属钨矿尾矿，有利于大规模推广使用。The technical scheme of the present invention is simple to operate for the beneficiation method of polymetallic tungsten ore tailings, has low agent cost, is suitable for various polymetallic tungsten ore tailings, and is conducive to large-scale popularization and use.
附图说明Description of drawings
图1为本发明从多金属钨矿尾矿中回收钨锡硫的选矿工艺流程图。Fig. 1 is the ore dressing process flow chart of the present invention for recovering tungsten, tin and sulfur from polymetallic tungsten ore tailings.
图2为实施例1和对照实例1的闭路实验流程。Fig. 2 is the closed-circuit experiment process of embodiment 1 and comparative example 1.
图3为实施例2的闭路实验流程。Fig. 3 is the closed-circuit experiment process of embodiment 2.
图4为实施例2的工业设备布置简图。FIG. 4 is a schematic layout diagram of industrial equipment in Embodiment 2.
具体实施方式Detailed ways
以下具体实施例旨在进一步说明本发明内容，而不是限制权利要求的保护范围。The following specific examples are intended to further illustrate the contents of the present invention, rather than limit the protection scope of the claims.
实施例1Example 1
利用本发明方法处理湖南郴州黄沙坪多金属钨矿尾矿，该矿山钨矿种为单一白钨矿，给矿浓度为40％，按照如图2所示的流程进行了闭路实验，通过碳酸钠调整尾矿pH为9.5，加入金属离子配合物捕收剂(Pb2+和水杨羟肟酸质量比1:1)400g/t，20g/t 2#油为起泡剂，组合抑制剂200g/t(硫酸铝40g/t、水玻璃80g/t和氟硅酸钠80g/t)粗选获得粗精矿；2次扫选空白不加药剂；精选采用组合抑制剂(两次精选的药剂总用量为200g/t，每次100g/t，硫酸铝、水玻璃和氟硅酸钠质量比为1:2:2)，经两次精选后得钨锡硫混合精矿。Utilize the method of the present invention to process the tailings of the polymetallic tungsten mine in Huangshaping, Chenzhou, Hunan. The tungsten ore in this mine is a single scheelite, and the feeding concentration is 40%. Adjust tailings pH to 9.5, add metal ion complex collector (Pb2+ and salicylic hydroxamic acid mass ratio 1:1) 400g/t, 20g/t 2# oil as foaming agent, combined inhibitor 200g/t (aluminum sulfate 40g/t, water glass 80g/t and sodium fluorosilicate 80g/t) roughing to obtain coarse concentrate; 2 times of sweeping blank without adding reagent; The total dosage is 200g/t, 100g/t each time, the mass ratio of aluminum sulfate, water glass and sodium fluorosilicate is 1:2:2), and the tungsten-tin-sulfur mixed concentrate can be obtained after twice beneficiation.
钨锡硫混合精矿进行反浮选脱硫工艺获取钨锡混合精矿，反浮选脱硫工艺包含一次粗选、两次精选和两次扫选，粗选以500g/t草酸为活化剂，3000g/t水玻璃为抑制剂，300g/t丁基黄药为捕收剂，20g/t 2#油为起泡剂；2次扫选仅添加10g/t 2#油起泡剂；2次精选空白不添加药剂。最终指标如表1所示，可获得WO3总体回收率72.58％，Sn总体回收率50.46％，S回收率68.3％的指标。The tungsten-tin-sulfur mixed concentrate is obtained by the reverse flotation desulfurization process to obtain the tungsten-tin mixed concentrate. The reverse flotation desulfurization process includes one roughing, two beneficiation and two sweeping. The roughing uses 500g/t oxalic acid as the activator. 3000g/t water glass is used as inhibitor, 300g/t butyl xanthate is used as collector, 20g/t 2# oil is used as foaming agent; only 10g/t 2# oil foaming agent is added for 2 sweeps; 2 times The selected blank does not add medicine. The final indicators are shown in Table 1. The overall recovery rate of WO3 is 72.58%, the overall recovery rate of Sn is 50.46%, and the index of S recovery rate is 68.3%.
表1实例1实验指标Table 1 Example 1 Experimental Index
对照实施例1Comparative Example 1
本对比实例与实施例1作为对照，用于对比混合粗选抑制剂中硫酸铝对浮选过程的影响：This comparative example and embodiment 1 are used as contrast, for contrasting the impact of aluminum sulfate on the flotation process in the mixed roughing depressant:
与实施例1的唯一区别在于：组合抑制剂为水玻璃和氟硅酸钠质量比为1:1(共200g/t)。浮选流程和其他条件参照实施例1。The only difference from Example 1 is that the combined inhibitor is water glass and sodium fluorosilicate with a mass ratio of 1:1 (total 200g/t). Flotation process and other conditions with reference to embodiment 1.
最终指标如表2所示，WO3总体回收率仅有35.92％，Sn总体回收率19.62％，S回收率81.68％。上述结果说明硫酸铝不添加的情况下，抑制剂I的选择性较差，严重影响钨锡的回收率。The final indicators are shown in Table 2. The overall recovery rate of WO3 is only 35.92%, the overall recovery rate of Sn is 19.62%, and the recovery rate of S is 81.68%. Above-mentioned result shows that under the situation that aluminum sulfate is not added, the selectivity of inhibitor I is poor, has a strong impact on the recovery rate of tungsten and tin.
表2对照实施例1实验指标Table 2 comparative example 1 experimental index
实施例2Example 2
利用本工艺方法处理湖南郴州柿竹园多金属钨尾矿，该矿山为黑白钨共生钨矿山(黑白钨比例约为4：6)，调节给矿浓度为42％，按照如图3所示的药剂和流程进行了日处理量1500t/d的工业实验(工业设备布置简图如图4所示)。Use this process to treat polymetallic tungsten tailings in Shizhuyuan, Chenzhou, Hunan. The mine is a black and white tungsten symbiotic tungsten mine (the ratio of black and white tungsten is about 4:6), and the concentration of the ore is adjusted to 42%. Chemicals and processes have been carried out in an industrial experiment with a daily processing capacity of 1500t/d (a schematic layout of industrial equipment is shown in Figure 4).
通过碳酸钠调整尾矿pH为9.6，加入金属离子配合物捕收剂(Pb2+和萘基羟肟酸质量比1:1)450g/t，25g/t 2#油为起泡剂，组合抑制剂300g/t(硫酸铝60g/t、水玻璃120g/t和氟硅酸钠120g/t)，粗选获得粗精矿；1次扫选空白不加药剂；精选采用组合抑制剂(两次精选的药剂总用量为300g/t，每次150g/t，硫酸铝、水玻璃和氟硅酸钠质量比为1:2:2)，经两次精选后得钨锡硫混合精矿。Adjust tailings pH to 9.6 with sodium carbonate, add metal ion complex collector (Pb2+ and naphthyl hydroxamic acid mass ratio 1:1) 450g/t, 25g/t 2# oil as foaming agent, combine Inhibitor 300g/t (aluminum sulfate 60g/t, water glass 120g/t and sodium fluorosilicate 120g/t), roughing to obtain rough concentrate; 1 sweeping blank without adding agent; selection using combined inhibitor ( The total dosage of the twice-selected chemicals is 300g/t, each time is 150g/t, the mass ratio of aluminum sulfate, water glass and sodium fluorosilicate is 1:2:2), and the mixture of tungsten-tin-sulfur is obtained after twice-selected concentrate.
钨锡硫混合精矿进行反浮选脱硫工艺获取钨锡混合精矿，反浮选脱硫工艺包含一次粗选、两次精选和两次扫选，粗选以400g/t草酸为活化剂，以2400g/t水玻璃为抑制剂，350g/t丁基黄药为捕收剂，20g/t 2#油为起泡剂；2次扫选仅添加10g/t 2#油起泡剂；2次精选空白不添加药剂。最终指标如表2所示，可获得WO3总体回收率73.93％，Sn总体回收率58.60％，S回收率76.96％的指标。The tungsten-tin-sulfur mixed concentrate is obtained by the reverse flotation desulfurization process to obtain the tungsten-tin mixed concentrate. The reverse flotation desulfurization process includes one roughing, two beneficiation and two sweeping. The roughing uses 400g/t oxalic acid as the activator. 2400g/t water glass is used as inhibitor, 350g/t butyl xanthate is used as collector, 20g/t 2# oil is used as foaming agent; only 10g/t 2# oil foaming agent is added in the second sweep; 2 No medicine was added to the second selected blank. The final indicators are shown in Table 2. The overall recovery rate of WO3 is 73.93%, the overall recovery rate of Sn is 58.60%, and the index of S recovery rate is 76.96%.
表2实施例2实验指标Table 2 embodiment 2 experimental index
Claims (8)
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