WO2015123798A1 - Comprehensive recovery method for gold flotation tailings and device therefor - Google Patents

Comprehensive recovery method for gold flotation tailings and device therefor Download PDF

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WO2015123798A1
WO2015123798A1 PCT/CN2014/000504 CN2014000504W WO2015123798A1 WO 2015123798 A1 WO2015123798 A1 WO 2015123798A1 CN 2014000504 W CN2014000504 W CN 2014000504W WO 2015123798 A1 WO2015123798 A1 WO 2015123798A1
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tailings
gold
spiral chute
concentrate
concentration
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PCT/CN2014/000504
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French (fr)
Chinese (zh)
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王江飞
李先军
王健
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哈巴河金坝矿业有限公司
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Priority to CN201410057397.8A priority Critical patent/CN103816990B/en
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Publication of WO2015123798A1 publication Critical patent/WO2015123798A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00General arrangement of separating plant, e.g. flow sheets

Abstract

Provided is a comprehensive recovery method for gold flotation tailings, comprising the following steps: the flotation tailings are classified by a hydrocyclone; coarse grains enter a vibrating spiral chute for sorting, the ore concentrate from the vibrating spiral chute enters a shaking table for further sorting, and the middling ore from the vibrating spiral chute returns to the vibrating spiral chute for re-sorting; the ore concentrate from the shaking table is a gold concentrate, the middling ore from the shaking table returns to the vibrating spiral chute for re-sorting, and the tailings from the shaking table undergo a magnetic separation; the ore concentrate from the magnetic separation is an iron concentrate, the fine grain overflow from the hydrocyclone, the tailings from the vibrating spiral chute and the tailings from the magnetic separation converge together to enter a tailing pressure filtration system, and the tailing backwater returns for recycling. Moreover, also provided is a device for realizing the above-mentioned method, wherein the device consists of a hydrocyclone, a vibrating spiral chute, a shaking table, a magnetic separator and a concentration system. The gold recovery is improved and the cost is reduced by using the method and the device.

Description

一种金浮选尾矿综合回收方法及其装置 技术领域  Gold flotation tailings comprehensive recovery method and device thereof
本发明涉及黄金选矿技术领域,尤其涉及一种金浮选尾矿综合回 收方法及其装置。  The invention relates to the technical field of gold beneficiation, in particular to a method and a device for comprehensive recovery of gold flotation tailings.
背景技术 Background technique
目前对于金浮选尾矿综合回收方法主要采用将尾矿分级后粗粒 再磨, 再磨后进行氰化浸出, 再磨存在成本过高, 氰化浸出污染大, 环保要求高, 并且对于浮选尾矿品位在 0. 3g/t以下的无任何经济价 值; 采用的振动螺旋溜槽比传统溜槽效率高, 起到提前抛尾的作用, 降低摇床处理量, 摇床主要是回收浮选无法回收未单体解离的金,磁 选主要回收其中的铁,通过尾矿压滤系统有效解决了重选耗水量大的 问题,本方法对 0. 20g/t以上金浮选尾矿均有回收价值,不仅能回收 回其中的金还能有效回收其中的铁, 达到综合回收的目的。  At present, the comprehensive recovery method for gold flotation tailings mainly adopts the re-grinding of tailings after grading, and then cyanidation leaching after grinding, the cost of grinding is too high, the cyanide leaching pollution is high, the environmental protection requirements are high, and for floating The tailings grade has no economic value below 0.3g/t; the vibrating spiral chute used is more efficient than the traditional chute, which plays the role of early tailing, reducing the processing capacity of the shaker, and the shaker is mainly unable to recover the flotation. The gold which is not dissociated by the monomer is recovered, and the iron is mainly recovered by the magnetic separation. The tailings pressure filtration system effectively solves the problem of large water consumption in the re-election. The method has a gold flotation tailings of more than 0.2 g/t. The value of recycling can not only recover the gold in it but also effectively recover the iron in it, achieving the purpose of comprehensive recycling.
发明内容 本发明的目的是对现有金浮选尾矿回收工艺进行改进,提供一种 成本低、 无毒害、 经济的一种金浮选尾矿综合回收方法及装置。 SUMMARY OF THE INVENTION The object of the present invention is to improve the existing gold flotation tailings recovery process, and to provide a low-cost, non-toxic and economical gold flotation tailings comprehensive recovery method and device.
本发明采用如下技术方案:  The invention adopts the following technical solutions:
本发明的金浮选尾矿综合回收方法的具体步骤如下:  The specific steps of the gold flotation tailings comprehensive recovery method of the present invention are as follows:
( 1 ) 浮选尾矿首先进入旋流器进行分级, 分级后大于 74 μ ιη含量大 于 55%为粗粒, 金品位为 0. 45g/t, 其浓度为 60%, 小于 37 μ ιιι含量 大于 85%为细粒, 金品位为 0. 12g/t ; (2 )步骤(1 )分级后的粗粒进入振动螺旋溜槽, 细粒溢流进入尾矿 浓缩系统, 粗粒在振动螺旋溜槽中被分为精矿、 中矿和尾矿, 金品位 为 0. 12g/t作为尾矿,金品位在 0. 12g/t-0. 86g/t以下为中矿,金品 位在 0. 86g/t以上、 磁铁矿含量为 5. 6%以上为精矿; (1) The flotation tailings first enters the cyclone for classification. After classification, the content is greater than 74 μ η, and the content is greater than 55%, and the gold grade is 0. 45g/t. The concentration is 60%, and the content is less than 37 μ ι. 8重量为为为为12.12g/t ; (2) Step (1) The coarse particles after classification enter the vibrating spiral chute, and the fine particles overflow into the tailings concentration system. The coarse particles are divided into concentrate, medium ore and tailings in the vibrating spiral chute, and the gold grade is 0. 6%以上为浓缩矿。 12g / t as a tailings, gold grade at 0. 12g / t-0. 86g / t below the medium ore, gold grade at 0. 86g / t or more, magnetite content of more than 5. 6% for concentrate ;
( 3 ) 振动螺旋溜槽中的精矿进入摇床, 中矿返回旋流器再选, 尾矿 进入尾矿压滤系统, 精矿在摇床中筛选为金精矿、 中矿和尾矿, 金品 位为 0. 12g/t作为尾矿, 金品位在 0. 12g/t-8. 65g/t以下为中矿,金 品位在 8. 65g/t以上、 磁铁矿含量为 9. 0%以上为精矿;  (3) The concentrate in the vibrating spiral chute enters the shaker, the middle mine returns to the cyclone and re-selects, the tailings enter the tailings filter press system, and the concentrate is screened as gold concentrate, medium mine and tailings in the shaker. 0%。 The gold grade is 0. 12g / t as a tailings, the gold grade is 0. 12g / t - 8. 65g / t below the medium ore, the gold grade is above 8. 65g / t, the magnetite content is 9. 0% The above is the concentrate;
(4 ) 摇床中矿返回振动螺旋溜槽再选, 摇床尾矿进入磁选;  (4) The rock in the shaker is returned to the vibrating spiral chute for re-election, and the shaker tailings enters the magnetic separation;
( 5 ) 磁选精矿为铁精矿, 尾矿进入尾矿浓縮系统。  (5) The magnetic separation concentrate is iron concentrate, and the tailings enter the tailings concentration system.
步骤(1 ) 中, 旋流器进行分级的给矿压力为 l. OMpa, 进浆浓度 步骤(2 ) 中, 振动螺旋溜槽的振动频率为 120次 /分, 从入料到 出料选别需要 60s, 选别浓度 25%。  In the step (1), the swirling device performs the classification of the ore pressure to be 1. OMpa, and in the slurry concentration step (2), the vibration frequency of the vibrating spiral chute is 120 times/min, and the material is required to be fed to the discharge. 60s, the concentration is 25%.
步骤 (3 ) 中, 摇床的床面倾角横坡 1. 5° , 纵坡 2. 0° , 冲程 22mm,冲次 260r/min, 选别浓度 12%。  In step (3), the bed angle of the shaker is 1. 5°, the longitudinal slope is 2. 0°, the stroke is 22 mm, the stroke is 260 r/min, and the concentration is 12%.
步骤(4) 中, 磁选的磁场强度 1350高斯, 选别浓度 25%。 浓缩系统是由浓密机和陶瓷过滤机组成。  In step (4), the magnetic field strength of the magnetic separation is 1350 Gauss, and the concentration is 25%. The concentration system consists of a thickener and a ceramic filter.
本发明的金浮选尾矿综合回收的装置是由旋流器、 振动螺旋溜 槽、摇床、磁选机和浓缩系统组成, 旋流器的粗粒出口与振动螺旋溜 槽进口连接;振动螺旋溜槽的精矿出口与摇床进口连接; 振动螺旋溜 槽的中矿出口与旋流器入口连接; 摇床尾矿出口与磁选机进口连接; 摇床中矿出口与振动螺旋溜槽入口连接; 旋流器细粒溢流出口、振动 螺旋溜槽尾矿出口、 磁选机尾矿出口汇合后接入浓縮系统进口。 The device for comprehensive recovery of gold flotation tailings of the invention is composed of a cyclone, a vibrating spiral chute, a shaker, a magnetic separator and a concentrating system, and the coarse-grain outlet and the vibrating spiral of the cyclone The inlet of the tank inlet is connected; the concentrate outlet of the vibrating spiral chute is connected with the inlet of the shaker; the middle ore outlet of the vibrating spiral chute is connected with the inlet of the cyclone; the outlet of the shaker tailings is connected with the inlet of the magnetic separator; the outlet of the shaker and the spiral of vibration The chute inlet connection; the cyclone fine-grain overflow outlet, the vibrating spiral chute tailings outlet, and the magnetic separator tailings outlet are merged and connected to the inlet of the concentration system.
浮选尾矿经过分级后粗粒 74 μ ιη所占比例由全尾矿 95%降低至 55%,使用重选的方法回收浮选无法回收的未单体解离金和其中的铁, 避免进行再次磨矿和氰化浸出。  After the flotation tailings are graded, the proportion of coarse particles 74 μm is reduced from 95% to 55% of the total tailings. Re-election method is used to recover the non-monomeric dissociated gold and iron in the flotation which cannot be recovered. Grinding and cyanide leaching again.
经过分级后, 尾矿中未单体解离的金元素比例由 10%提高至 40%, 利用振动螺旋溜槽先行抛尾,再进一步用摇床选别,重矿物得到富集, 摇床主要选别未单体解离的金,摇床尾矿再用磁选选出铁精矿; 旋流 器细粒溢流、振动螺旋溜槽尾矿、磁选尾矿合在一起经浓缩压滤系统, 干尾矿进尾矿库堆存, 回水经过处理回用。  After grading, the proportion of gold elements in the tailings that have not been dissociated from the tailings is increased from 10% to 40%. The vibrating spiral chute is used to throw the tail first, and then further sorted by a shaker, the heavy minerals are enriched, and the shaker is mainly selected. The gold that has not been dissociated by the monomer, the tailings of the shaker and the iron ore are selected by magnetic separation; the fine-grain overflow of the cyclone, the vibrating spiral chute tailings, and the magnetic separation tailings are combined together by the concentrated filter press system, The tailings are stored in the tailings pond, and the return water is treated and reused.
本发明的积极效果如下:  The positive effects of the present invention are as follows:
本发明的金浮选尾矿综合回收方法具有简便易行、成本低、无毒 害的优点。本发明对现有金浮选尾矿回收方法工艺进行改进后, 含量 为 0. 25g/t金、 4%磁性铁的浮选尾矿, 金回收率 52. 62%, 铁回收率 50. 95%, 成本降低了 9. 0%, 每吨浮选尾矿可实现利润 20元 /吨, 利润 较之前翻番。  The gold flotation tailings comprehensive recovery method of the invention has the advantages of simple and easy operation, low cost and no toxicity. The iron recovery rate is 52.62%, the iron recovery rate is 50. 95. The recovery rate of the gold flotation tailings is 0.25 g/t gold, 4% magnetic iron flotation tailings, the gold recovery rate is 52.62%, the iron recovery rate is 50.95. %, the cost is reduced by 9. 0%, the profit per ton of flotation tailings can be 20 yuan / ton, the profit doubled.
附图说明 DRAWINGS
图 1为现有技术的金浮选尾矿回收工艺流程。 Figure 1 shows the prior art process of gold flotation tailings recovery.
图 2为本发明的金浮选尾矿综合回收工艺流程。 具体实施方式 下面的实施例是对本发明的进一步详细描述。 2 is a process flow for comprehensive recovery of gold flotation tailings according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION The following examples are further details of the present invention.
现有金浮选尾矿回收工艺流程如图 1所示, 浮选尾矿经过分级后 粗粒进入再磨系统, 磨机排料经过旋流器分级后, 细粒溢流部分 37 含量为 85%, 进入氰化浸出系统, 粗粒返回磨机再磨。  The existing gold flotation tailings recovery process is shown in Figure 1. After the flotation tailings are classified, the coarse particles enter the regrind system. After the mill discharge is classified by the cyclone, the fine overflow portion 37 is 85. %, enter the cyanide leaching system, and return the coarse grain to the mill for regrind.
氰化浸出使用活性炭吸附, 解析冶炼出合质金。  Cyanide leaching uses activated carbon adsorption to analyze and smelt the combined gold.
本发明对现有金浮选尾矿回收工艺进行了改进, 各设备之间的连 接关系如下- 旋流器的粗粒出口接振动螺旋溜槽的进口, 旋流器的细粒溢流口 接尾矿浓缩压滤的进口;  The invention improves the existing gold flotation tailings recovery process, and the connection relationship between the devices is as follows - the coarse particle outlet of the cyclone is connected to the inlet of the vibrating spiral chute, and the fine-grain overflow port of the cyclone is connected to the tailings Concentrated injection filter inlet;
振动螺旋溜槽的精矿出口接摇床进口, 中矿出口返回振动螺旋溜 槽进口, 尾矿接尾矿浓缩压滤进口;  The concentrate outlet of the vibrating spiral chute is connected to the shaker inlet, the middle mine exit is returned to the vibrating spiral chute inlet, and the tailings are connected to the tailings concentrated filter press inlet;
摇床精矿为金精矿, 中矿出口接振动螺旋溜槽进口, 尾矿接磁选 进口;  The shaker concentrate is a gold concentrate, the middle ore outlet is connected to the vibrating spiral chute inlet, and the tailings are connected to the magnetic inlet;
具体实施方案如下:  The specific implementation scheme is as follows:
金浮选尾矿经过 Φ 100*8旋流器组分级,粗粒进入 10台 5LL-1200 振动螺旋溜槽; 溜槽精矿进入 20台细沙摇床, 溜槽中矿返回再选; 摇床精矿为金精矿, 中矿返回溜槽再选, 摇床尾矿进入磁选机磁选; 磁选精矿为铁精矿, 旋流器细粒溢流、溜槽尾矿、磁选尾矿汇合进入 尾矿浓缩压滤系统,尾矿进入尾矿库干堆, 回水经处理后返回系统再 用。 改进后的金浮选尾矿综合回收工艺经过上述改进后, 在其它不变 的情况下, 选矿技术指标如下: The gold flotation tailings passes through the Φ 100*8 cyclone component grade, and the coarse grain enters 10 sets of 5LL-1200 vibrating spiral chutes; the chute concentrate enters 20 sets of fine sand shakers, and the chute returns to the ore; the shaker concentrate For gold concentrate, medium mine return chute re-selection, shaker tailings enter magnetic separator magnetic separation; magnetic separation concentrate is iron concentrate, cyclone fine-grain overflow, chute tailings, magnetic separation tailings merge into tail The mine concentrates the filter press system, and the tailings enter the dry heap of the tailings pond. The returned water is returned to the system for treatment. After the improved gold flotation tailings comprehensive recovery process has been improved, in other unchanged conditions, the mineral processing technical indicators are as follows:
Figure imgf000007_0001
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术 人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这 些实施例进行多种变化、修改、替换和变型, 本发明的范围由所附权 利要求及其等同物限定。
Figure imgf000007_0001
While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the invention is defined by the appended claims and their equivalents.

Claims

权 利 要 求 书 Claims
1、 一种金浮选尾矿综合回收方法, 其特征在于: 所述方法的具体步骤如下: 1. A method for comprehensive recovery of gold flotation tailings, characterized in that: the specific steps of the method are as follows:
( 1 ) 浮选尾矿首先进入旋流器进行分级, 大于 74 μ m含量大于 55%为粗粒, 小于 37 μ m含量大于 85%为细粒; (1) The flotation tailings first enters the cyclone for classification. The content greater than 74 μm is greater than 55% for coarse particles, and the content less than 37 μm is greater than 85% for fine particles;
(2) 步骤 (1) 分级后的粗粒进入振动螺旋溜槽, 细粒溢流进入尾矿浓缩系 统, 粗粒在振动螺旋溜槽中被分为精矿、 中矿和尾矿, 金品位为 0.12g/t作为 尾矿, 金品位在 0.12g/t-0.86g/t以下为中矿, 金品位在 0.86g/t以上、 磁铁 矿含量为 5.6%以上为精矿;  (2) Step (1) The classified coarse particles enter the vibrating spiral chute, and the fine-grained overflow enters the tailings concentration system. The coarse particles are divided into concentrate, medium ore and tailings in the vibrating spiral chute, and the gold grade is 0.12. g/t as tailings, the gold grade is below 0.12g/t-0.86g/t for medium ore, the gold grade is above 0.86g/t, and the magnetite content is above 5.6% for concentrate;
(3)振动螺旋溜槽中的精矿进入摇床, 中矿返回旋流器再选, 尾矿进入尾矿 压滤系统, 精矿在摇床中筛选为金精矿、 中矿和尾矿, 金品位为 0.12g/t作为 尾矿, 金品位在 0.12g/t- 8.65g/t以下为中矿, 金品位在 8.65g/t以上、 磁铁 矿含量为 9.0%以上为精矿;  (3) The concentrate in the vibrating spiral chute enters the shaker, the middle mine returns to the cyclone and re-selects, the tailings enter the tailings filter press system, and the concentrate is screened as gold concentrate, medium mine and tailings in the shaker. The gold grade is 0.12g/t as the tailings, the gold grade is below 0.12g/t- 8.65g/t, the gold grade is above 8.65g/t, and the magnetite content is above 9.0%.
(4) 摇床中矿返回振动螺旋溜槽再选, 摇床尾矿进入磁选;  (4) The rock in the shaker returns to the vibrating spiral chute and the shaker tailings enters the magnetic separation;
(5) 磁选精矿为铁精矿, 尾矿进入尾矿浓缩系统。  (5) The magnetic separation concentrate is an iron concentrate, and the tailings enter the tailings concentration system.
2、 如权利要求 1所述的金浮选尾矿综合回收方法, 其特征在于: 步骤(1) 中, 旋流器进行分级的浮选尾矿金品位为 0.25g/t, 细度 74μιη含量为 95%, 给矿压 力为 l.OMpa, 进浆浓度 35%, 采用 Φ 100*8旋流器组, 沉沙嘴为 Φ15, 分级后大 于 74 μπι含量 55%为粗粒, 金品位为 0.45g/t, 其浓度为 60%, 小于 37 μ m含量 85%为细粒, 金品位为 0.12g/t。  2. The gold flotation tailings comprehensive recovery method according to claim 1, wherein: in step (1), the cyclone tailing gold grade of the cyclone is 0.25 g/t, and the fineness is 74 μιη. 95%, the ore pressure is l.OMpa, the slurry concentration is 35%, the Φ 100*8 cyclone group is used, the sedimentation mouth is Φ15, the classification is more than 74 μπι content 55% is coarse grain, the gold grade is 0.45g /t, its concentration is 60%, less than 37 μm, 85% is fine, and the gold grade is 0.12g/t.
3、 如权利要求 1所述的金浮选尾矿综合回收方法, 其特征在于: 步骤 (2) 中, 振动螺旋溜槽的直径为 1200mm螺旋溜槽, 振动频率为 120次 /分, 从入料到出 料选别需要 60s, 选别浓度 25%。  3. The method for comprehensively recovering gold flotation tailings according to claim 1, wherein: in step (2), the diameter of the vibrating spiral chute is 1200 mm spiral chute, and the vibration frequency is 120 times/min, from feeding to The discharge selection takes 60s and the concentration is 25%.
4、 如权利要求 1所述的金浮选尾矿综合回收方法, 其特征在于: 步骤(3) 中, 摇床的床面倾角橫坡 1.5° , 纵坡 2.0° , 冲程 22mm,冲次 260r/min, 选别浓度 12%。 4. The gold flotation tailings comprehensive recovery method according to claim 1, wherein: in step (3), the bed angle of the shaker is 1.5°, the longitudinal slope is 2.0°, the stroke is 22 mm, and the stroke is 260r. /min, select concentration 12%.
5、 如权利要求 1所述的金浮选尾矿综合回收方法, 其特征在于: 步骤(4 ) 中, 磁选的磁场强度 1350高斯, 选别浓度 25%。  5. The gold flotation tailings comprehensive recovery method according to claim 1, wherein: in the step (4), the magnetic field strength of the magnetic separation is 1350 Gauss, and the concentration is 25%.
6、 如权利要求 1所述的金浮选尾矿综合回收方法, 其特征在于: 浓縮系统是由 浓密机和陶瓷过滤机组成。  6. The gold flotation tailings comprehensive recovery method according to claim 1, wherein the concentration system is composed of a thickener and a ceramic filter.
7、 一种金浮选尾矿综合回收的装置, 其特征在于: 所述的装置是由旋流器、 振 动螺旋溜槽、 摇床、 磁选机和浓缩系统组成, 旋流器的粗粒出口与振动螺旋溜 槽进口连接; 振动螺旋溜槽的精矿出口与摇床进口连接; 振动螺旋溜槽的中矿 出口与旋流器入口连接; 摇床尾矿出口与磁选机进口连接; 摇床中矿出口与振 动螺旋溜槽入口连接; 旋流器细粒溢流出口、 振动螺旋溜槽尾矿出口、 磁选机 尾矿出口汇合后接入浓缩系统进口。  7. A device for comprehensive recovery of gold flotation tailings, characterized in that: the device is composed of a cyclone, a vibrating spiral chute, a shaker, a magnetic separator and a concentration system, and the coarse outlet of the cyclone Connected to the inlet of the vibrating spiral chute; the concentrate outlet of the vibrating spiral chute is connected with the inlet of the shaker; the middle ore outlet of the vibrating spiral chute is connected with the inlet of the cyclone; the outlet of the shaker tailings is connected with the inlet of the magnetic separator; It is connected with the inlet of the vibrating spiral chute; the cyclone fine-grain overflow outlet, the vibrating spiral chute tailings outlet, and the magnetic separator tailings outlet are merged and connected to the inlet of the concentration system.
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