WO2014117300A1 - Method for pre-treating ilmenite tailings after iron-beneficiation - Google Patents

Method for pre-treating ilmenite tailings after iron-beneficiation Download PDF

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Publication number
WO2014117300A1
WO2014117300A1 PCT/CN2013/000110 CN2013000110W WO2014117300A1 WO 2014117300 A1 WO2014117300 A1 WO 2014117300A1 CN 2013000110 W CN2013000110 W CN 2013000110W WO 2014117300 A1 WO2014117300 A1 WO 2014117300A1
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tailings
coarse
concentrate
grained
magnetic separation
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PCT/CN2013/000110
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French (fr)
Chinese (zh)
Inventor
白丽梅
牛福生
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河北联合大学
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Priority to CN201380003006.8A priority Critical patent/CN104394993B/en
Priority to PCT/CN2013/000110 priority patent/WO2014117300A1/en
Publication of WO2014117300A1 publication Critical patent/WO2014117300A1/en

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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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • 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
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/26—Magnetic separation acting directly on the substance being separated with free falling material
    • 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
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
    • C22B34/1204—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent
    • C22B34/1209—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent by dry processes, e.g. with selective chlorination of iron or with formation of a titanium bearing slag
    • 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
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/20—Magnetic separation whereby the particles to be separated are in solid form

Definitions

  • the invention belongs to the technical field of mineral processing, and particularly relates to a method for processing and utilizing iron ore tailings of ilmenite.
  • Titanium is an important metal raw material for modern industry. Titanium and its alloys are characterized by low density, high strength, high temperature resistance, abrasion resistance and non-toxicity, so they are widely used in various sectors of modern industrial and defense industries, such as steel metallurgy, petrochemical, aerospace, electroplating, medical Instruments, electrical industry and weapons and equipment. Its product titanium dioxide is an indispensable raw material for coatings, paper, printing, synthetic rubber and other industries.
  • the ilmenite tailings are waste products after crushing and grinding iron.
  • the huge ore processing cost is saved.
  • the separation of ilmenite from tailings into an essential part of the disposal of vanadium-titanium magnetite is through the recovery of tailings.
  • the ilmenite in China can not only effectively reduce tailings emissions, but also have important significance for energy conservation, improvement of economic and social benefits, and optimal resource allocation and sustainable development.
  • the invention aims at the current status of ilmenite ore tailings resources and the deficiencies of the prior art, and proposes a ferrotitanium iron tailings "strong magnetic-re-election-middle mine re-grinding-grading-re-selection separately "Preprocessing method.”
  • the ilmenite ore tailings are screened by sieve, the product on the sieve is sandstone, the product under the sieve is weakly magnetically selected, the weak magnetic separation concentrate is magnetite concentrate, and the weak magnetic separation tailings is strong.
  • Magnetic separation, strong magnetic separation tailings is the final tailings, strong magnetic separation concentrate for spiral chute re-election, spiral chute re-election concentrate for ilmenite coarse concentrate, spiral chute re-election tailings for final tailings;
  • the medium ore re-selected in the chute enters the grinding and grading operation for grinding.
  • the products of the grinding operation enter the fine sieve for classification, the coarse-grained materials are fed into the coarse-grain shaker for re-election, and the fine-grained materials are fed into the fine-grained shake.
  • the ilmenite iron ore tailings are sieved with a sieve hole of 1. 4 mm, the sieved product is sand, and the sieved product is subjected to weak magnetic separation, and the weak magnetic separation magnetic field strength is 160 kA/ m, weak magnetic separation concentrate is magnetite concentrate, weak magnetic separation tailings for strong magnetic separation, strong magnetic separation magnetic field strength is 900 kA/m, strong magnetic separation tailings is final tailings, strong magnetic separation concentrate
  • the spiral chute re-election is carried out, the spiral chute re-election concentrate is ilmenite coarse concentrate, and the spiral chute re-election tailings is the final tailings;
  • the middle ore re-selected by the spiral chute enters the grading equipment for grinding and grading operation, and the coarse-grained product of the grading equipment is fed into the grinding equipment, and then returned to the grading equipment after grinding, forming a closed loop of grinding grading, grinding
  • the grading equipment of the grading operation of the grading operation has a fineness of -0. 074mm, which is about 70%, and is classified into a fine sieve, and the material is divided into two grades of +0. 074 mm and -0.774 ;; +0. 074mm of material is fed into the coarse-grain shaker for re-election, and the coarse-grained shaker is re-elected by the coarse-grained shaker.
  • the shaker bed is 2. 5 degrees, and the mass concentration of the ore is 35%;
  • the 074mm material is fed to the fine-grain shaker for re-election, and the fine-grain shaker for re-election of the fine-grain shaker is a slime shaker, the slope of the shaker is 1. 5 degrees, and the mass concentration of the ore is 25%; ⁇
  • Concentrates selected by coarse-grain shaker re-election and fine-grain shaker are ilmenite coarse concentrate, coarse-grained shaker re-selected tailings and fine-grained shaker re-elected tailings The final tailings, the coarse-grained shaker re-selected medium ore is re-grinded into the grinding equipment of the grinding classification operation;
  • the invention adopting the above technical solution not only has low production cost, low investment, but also simple mineral processing operation, and is suitable for pretreatment of small and medium-sized dispersed ilmenite ore tailings.
  • the weak magnetic separation not only recovers the magnetite that is thrown into the tailings, but also prevents the blockage of the strong magnetic separation equipment.
  • 30% of the gangue can be pre-selected, and the sorting effect of the spiral chute re-election can be improved.
  • the middle mine of the spiral chute re-election has been studied, containing ilmenite without monomer dissociation, and the tailings are mainly muddy gangue.
  • the middle ore re-elected by the spiral chute In order to fully recover ilmenite, the middle ore re-elected by the spiral chute must be ground and re-selected.
  • the yield of the ore in the spiral chute is about 15%.
  • the amount of grinding not only reduces the processing cost and investment, but also reduces the adverse effects of over-grinding on ilmenite recovery and increases the recovery effect of ilmenite.
  • the sorting effect of the reselection device is affected by both density and granularity. Therefore, the coarsely graded product of the milled product can reduce the influence of the particle size on the sorting effect, so that the ilmenite in the fine fraction can be fully recovered.
  • the rock in the shaker is directly fed into the ball mill, which can prevent the coarse-grained lean body from being classified by the gravity classifying device and then entering the overflow of the extension device to form an infinite loop.
  • the ilmenite concentrate with a yield of 18-20% and Ti0 2 grade 25-30% can be selected from the ilmenite tailings, which greatly reduces the investment and production cost of the concentrator, and can realize titanium.
  • Reasonable utilization of iron ore tailings resources BRIEF DESCRIPTION OF THE DRAWINGS:
  • Figure 1 is a technical road map of the present invention. detailed description:
  • Example 1 The present invention will be described in detail below with reference to FIG. 1 and the embodiments: Example 1:
  • the ilmenite ore-selected titanium tailings used in the present invention are tailings in Chengde area, wherein the Ti0 2 grade is 6.48%, the total iron grade is 17.45%, the S grade is 0.011%, the V 2 0 5 grade is 0.024%, and the P grade is 1.03%, Si0 2 grade is 32.34%.
  • Main supporting equipment fine sieve, ball mill, weak magnetic separator, strong magnetic separator, spiral chute, mineral shaker, ore shaker.
  • the ilmenite ore tailings are sieved with a sieve hole of 1.4, and the sieved product is sieved.
  • the sieved product is subjected to weak magnetic separation, and the weak magnetic separation magnetic field strength is 160 kA/m.
  • Weak magnetic separation concentrate is magnetite concentrate, weak magnetic separation tailings for strong magnetic separation, strong magnetic separation magnetic field strength is 900 kA/m, strong magnetic separation tailings is the final tailings, strong magnetic separation concentrate for spiral
  • the chute is re-elected, the spiral chute re-election concentrate is ilmenite coarse concentrate, and the spiral chute re-election tailings is the final tailings.
  • the re-selected middle ore of the spiral chute enters the classifier of the grinding and grading operation.
  • the coarse-grained product of the classifier is fed into the ball mill, and the ball mill is ground and returned to the classifier to form a closed loop of the grinding grade, and the fine grain of the classifier
  • the grade material is the grader overflow, the overflow fineness is -0. 074mm, 70%, the overflow product is graded into the fine sieve, and the material is divided into two grades of +0. 074mm and -0.774mm; The material of +0.
  • 074mm is fed into the ore shaker re-selected by the coarse-grain shaker, the slope of the shaker is 2.5 degrees, the mass concentration of the ore is 35%; the material of -0. 074mm is fed into the fine-grain shake
  • the bed is re-elected with a slime shaker, the slope of the shaker is 1. 5 degrees, and the mass concentration of the ore is 25%.
  • the coarse ore shaker re-elected concentrate and fine-grain shaker re-elected concentrate is ilmenite coarse concentrate, coarse-grain shaker re-selected tailings and fine-grained shaker re-selected tailings are the final tailings
  • the coarse ore shaker re-selected medium ore is re-grinded into the grinding equipment of the grinding classification operation.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A method for pre-treating ilmenite tailings after iron-beneficiation, comprising: firstly, ilmenite tailings are screened by a screen after iron-beneficiation; the product on the screen is gravel which can be used as a building material, and the product below the screen is subjected to low-intensity magnetic separation; then the tailings of the low-intensity magnetic separation are subjected to a strong-intensity magnetic separation; the concentrate from the strong magnetic separation is subjected to gravity separation by a spiral chute; the middling from the spiral chute gravity separation is ground; then the product from the grinding is fed into a fine screen for classification; the coarse grain material and the fine grain material are respectively subjected to a gravity separation by a shaking table, wherein the concentrate from the spiral-chute gravity separation and the concentrate from the shaking table are rough concentrates of the ilmenite, and the tailings from the spiral chute and shaking table are the final tailings. This process has a simple device, low production cost and relatively low investment.

Description

一种钛铁矿选铁尾矿的预处理方法  Pretreatment method for ilmenite ore tailings
技术领域 Technical field
本发明属于矿物加工技术领域， 特别涉及一种钛铁矿选铁尾矿的加工 利用方法。  The invention belongs to the technical field of mineral processing, and particularly relates to a method for processing and utilizing iron ore tailings of ilmenite.
背景技术 Background technique
钛是现代工业的重要金属原料。 钛及其合金具有密度小、 强度高、 耐 高温、 耐磨蚀和无毒等特性， 因而广泛应用于现代工业和国防工业的各个 部门， 如钢铁冶金、 石油化工、 航天航空、 电解电镀、 医疗器械、 电气工 业和武器装备等。 其产品钛白粉更是涂料、 造纸、 印刷、 合成纤维橡胶等 工业不可缺少的原料。  Titanium is an important metal raw material for modern industry. Titanium and its alloys are characterized by low density, high strength, high temperature resistance, abrasion resistance and non-toxicity, so they are widely used in various sectors of modern industrial and defense industries, such as steel metallurgy, petrochemical, aerospace, electroplating, medical Instruments, electrical industry and weapons and equipment. Its product titanium dioxide is an indispensable raw material for coatings, paper, printing, synthetic rubber and other industries.
钛铁矿尾矿是经过破碎磨矿选铁之后的废弃产品，在后续钛铁矿分选利 用过程中， 相比其它原生钛铁矿石的选别富集， 节约了巨大的矿石加工成 本， 同时随着环保政策和资源综合利用的落实执行， 以及钛资源短缺等问 题， 使得从尾矿中分选钛铁矿成为钒钛磁铁矿处置过程中的一个必不可少 环节， 通过回收尾矿中的钛铁矿不仅可以有效减少尾矿排放， 同时对于节 约能源、 提高企业经济和社会效益， 实现资源优化配置和可持续发展具有 重要意义。 因此不少科研院校对钛铁矿尾矿进行了研究， 有采用 "磨矿-强 磁-浮选"工艺的， "强磁-浮选"工艺的， 也有采用 "强磁 -磨矿浮选-电选" 工艺的， 浮选和电选的选矿工艺比较复杂， 选矿成本较高。 而承德地区的 钛铁矿尾矿大都是一些分散的尾矿库和一些分散的中小型选矿企业， 使用 此复杂的工艺不仅经济效益不太合理， 并且工艺操作和管理上也很难实现, 所以目前这些钛铁矿选铁尾矿还没有得到充分利用。 发明内容  The ilmenite tailings are waste products after crushing and grinding iron. In the process of sorting and utilizing the ilmenite, compared with other raw ilmenite ore, the huge ore processing cost is saved. At the same time, with the implementation of environmental protection policies and comprehensive utilization of resources, and the shortage of titanium resources, the separation of ilmenite from tailings into an essential part of the disposal of vanadium-titanium magnetite is through the recovery of tailings. The ilmenite in China can not only effectively reduce tailings emissions, but also have important significance for energy conservation, improvement of economic and social benefits, and optimal resource allocation and sustainable development. Therefore, many research institutes have studied ilmenite tailings, using the "grinding-strong magnetic-flotation" process, the "strong magnetic-flotation" process, and the "strong magnetic-grinding float". The process of selective-electrical selection, process, flotation and electrification is more complicated, and the cost of mineral processing is higher. The ilmenite tailings in Chengde are mostly scattered tailings ponds and some scattered small and medium-sized mineral processing enterprises. The use of this complicated process is not only unreasonable in economic efficiency, but also difficult to realize in process operation and management. At present, these ilmenite ore tailings have not been fully utilized. Summary of the invention
本发明针对现在钛铁矿选铁尾矿的资源现状和现有技术存在的不足， 提出了一种钛铁矿选铁尾矿 "强磁-重选-中矿再磨 -分级 -分别重选" 的预处 理方法。 首先将钛铁矿选铁尾矿用筛字进行筛分， 筛上产品为沙石， 筛下 产品进行弱磁选， 弱磁选精矿为磁铁矿精矿， 弱磁选尾矿进行强磁选， 强 磁选尾矿为最终尾矿， 强磁选精矿进行螺旋溜槽重选， 螺旋溜槽重选精矿 为钛铁矿粗精矿， 螺旋溜槽重选尾矿为最终尾矿； 螺旋溜槽重选的中矿进 入磨矿分级作业进行磨矿， 磨矿作业的产品进入细筛进行分级， 将粗粒级 物料给入粗粒摇床重选， 将细粒级物料给入细粒摇床重选； 粗粒摇床重选 的精矿和细粒摇床重选的精矿为钛铁矿粗精矿， 粗粒摇床重选的尾矿和细 粒摇床重选的尾矿为最终尾矿， 粗粒摇床重选的中矿给入磨矿分级作业的 磨矿设备进行再磨； 本发明的技术方案为： The invention aims at the current status of ilmenite ore tailings resources and the deficiencies of the prior art, and proposes a ferrotitanium iron tailings "strong magnetic-re-election-middle mine re-grinding-grading-re-selection separately "Preprocessing method." Firstly, the ilmenite ore tailings are screened by sieve, the product on the sieve is sandstone, the product under the sieve is weakly magnetically selected, the weak magnetic separation concentrate is magnetite concentrate, and the weak magnetic separation tailings is strong. Magnetic separation, strong magnetic separation tailings is the final tailings, strong magnetic separation concentrate for spiral chute re-election, spiral chute re-election concentrate for ilmenite coarse concentrate, spiral chute re-election tailings for final tailings; The medium ore re-selected in the chute enters the grinding and grading operation for grinding. The products of the grinding operation enter the fine sieve for classification, the coarse-grained materials are fed into the coarse-grain shaker for re-election, and the fine-grained materials are fed into the fine-grained shake. Bed re-election; coarse-grain shaker re-election concentrate and fine-grain shaker re-election concentrate is ilmenite coarse concentrate, coarse-grain shaker re-selected tailings and fine-grain shaker re-selected tailings For the final tailings, the coarse ore shaker re-selected medium ore is re-grinded into the grinding equipment of the grinding classification operation; The technical solution of the present invention is:
( 1 )首先将钛铁矿选铁尾矿用筛孔为 1. 4mm的筛字进行筛分， 筛上产 品为沙石， 筛下产品进行弱磁选， 弱磁选磁场强度为 160 kA/m, 弱磁选精 矿为磁铁矿精矿， 弱磁选尾矿进行强磁选， 强磁选磁场强度为 900 kA/m， 强磁选尾矿为最终尾矿， 强磁选精矿进行螺旋溜槽重选， 螺旋溜槽重选精 矿为钛铁矿粗精矿， 螺旋溜槽重选尾矿为最终尾矿；  (1) First, the ilmenite iron ore tailings are sieved with a sieve hole of 1. 4 mm, the sieved product is sand, and the sieved product is subjected to weak magnetic separation, and the weak magnetic separation magnetic field strength is 160 kA/ m, weak magnetic separation concentrate is magnetite concentrate, weak magnetic separation tailings for strong magnetic separation, strong magnetic separation magnetic field strength is 900 kA/m, strong magnetic separation tailings is final tailings, strong magnetic separation concentrate The spiral chute re-election is carried out, the spiral chute re-election concentrate is ilmenite coarse concentrate, and the spiral chute re-election tailings is the final tailings;
( 2 )螺旋溜槽重选的中矿进入磨矿分级作业的分级设备， 分级设备的 粗粒级产品给入磨矿设备， 磨矿后再返给分级设备， 构成磨矿分级的闭路 循环， 磨矿分级作业的分级设备的细粒级产品细度为 -0. 074mm约占 70%， 给入细筛进行分级，将物料分为 +0. 074mm和 -0. 074瞧两个粒级；将 +0. 074mm 的物料给入粗粒摇床重选， 粗粒摇床重选的粗粒摇床为矿砂摇床， 摇床坡 度为 2. 5度， 给矿的质量浓度为 35%; 将 -0. 074mm的物料给入细粒摇床重 选， 细粒摇床重选的细粒摇床为矿泥摇床， 摇床坡度为 1. 5度， 给矿的质 量浓度为 25%; ·  (2) The middle ore re-selected by the spiral chute enters the grading equipment for grinding and grading operation, and the coarse-grained product of the grading equipment is fed into the grinding equipment, and then returned to the grading equipment after grinding, forming a closed loop of grinding grading, grinding The grading equipment of the grading operation of the grading operation has a fineness of -0. 074mm, which is about 70%, and is classified into a fine sieve, and the material is divided into two grades of +0. 074 mm and -0.774 ;; +0. 074mm of material is fed into the coarse-grain shaker for re-election, and the coarse-grained shaker is re-elected by the coarse-grained shaker. The shaker bed is 2. 5 degrees, and the mass concentration of the ore is 35%; The 074mm material is fed to the fine-grain shaker for re-election, and the fine-grain shaker for re-election of the fine-grain shaker is a slime shaker, the slope of the shaker is 1. 5 degrees, and the mass concentration of the ore is 25%; ·
( 3 )粗粒摇床重选的精矿和细粒摇床重选的精矿为钛铁矿粗精矿， 粗 粒摇床重选的尾矿和细粒摇床重选的尾矿为最终尾矿， 粗粒摇床重选的中 矿给入磨矿分级作业的磨矿设备进行再磨；  (3) Concentrates selected by coarse-grain shaker re-election and fine-grain shaker are ilmenite coarse concentrate, coarse-grained shaker re-selected tailings and fine-grained shaker re-elected tailings The final tailings, the coarse-grained shaker re-selected medium ore is re-grinded into the grinding equipment of the grinding classification operation;
采用上述技术方案的本发明与现有技术相比， 该方法不仅生产成本低， 投资少， 选矿操作也简单， 适合中小型分散的钛铁矿选铁尾矿的预处理。 经过弱磁选不仅可以回收丢入尾矿中的磁铁矿， 还可以防止强磁选设备的 堵塞。 经过强磁选可以预选抛除 30%的脉石， 并且可以改善螺旋溜槽重选 的分选效果。 螺旋溜槽重选的中矿经过研究， 含有没有单体解离的钛铁矿， 而尾矿主耍是易泥化脉石。 要充分回收钛铁矿， 必须把螺旋溜槽重选的中 矿进行磨矿再选， 螺旋溜槽中矿的产率约为 15%左右， 如只对螺旋溜槽中 矿进行再磨， 大大降低了入磨矿量， 不仅降低了加工成本和投资， 也减少 了过磨对钛铁矿回收的不利影响， 增加了钛铁矿 ·的回收效果。 重选设备的 分选效果受密度和粒度两者的影响。所以对磨矿后的产品进行了粗细分级， 可以减小粒度对分选效果的影响， 这样能充分回收细粒级中的钛铁矿。 摇 床中矿直接给入球磨机， 可以防止粗粒级的贫连生体经过重力分级设备分 级后， 又进入分机设备的溢流中形成死循环。 通过该工艺处理后， 可从钛 铁矿尾矿中选出产率 18- 20%， Ti02品位 25-30% 的钛铁矿粗精矿， 大大降 低了选矿厂的投资和生产成本， 可实现钛铁矿尾矿资源合理利用。 附图说明： Compared with the prior art, the invention adopting the above technical solution not only has low production cost, low investment, but also simple mineral processing operation, and is suitable for pretreatment of small and medium-sized dispersed ilmenite ore tailings. The weak magnetic separation not only recovers the magnetite that is thrown into the tailings, but also prevents the blockage of the strong magnetic separation equipment. After strong magnetic separation, 30% of the gangue can be pre-selected, and the sorting effect of the spiral chute re-election can be improved. The middle mine of the spiral chute re-election has been studied, containing ilmenite without monomer dissociation, and the tailings are mainly muddy gangue. In order to fully recover ilmenite, the middle ore re-elected by the spiral chute must be ground and re-selected. The yield of the ore in the spiral chute is about 15%. For example, only the reaming of the ore in the spiral chute is greatly reduced. The amount of grinding not only reduces the processing cost and investment, but also reduces the adverse effects of over-grinding on ilmenite recovery and increases the recovery effect of ilmenite. The sorting effect of the reselection device is affected by both density and granularity. Therefore, the coarsely graded product of the milled product can reduce the influence of the particle size on the sorting effect, so that the ilmenite in the fine fraction can be fully recovered. The rock in the shaker is directly fed into the ball mill, which can prevent the coarse-grained lean body from being classified by the gravity classifying device and then entering the overflow of the extension device to form an infinite loop. After the treatment, the ilmenite concentrate with a yield of 18-20% and Ti0 2 grade 25-30% can be selected from the ilmenite tailings, which greatly reduces the investment and production cost of the concentrator, and can realize titanium. Reasonable utilization of iron ore tailings resources. BRIEF DESCRIPTION OF THE DRAWINGS:
图 1是本发明的技术路线图。 具体实施方式：  Figure 1 is a technical road map of the present invention. detailed description:
下面结合附图 1及实施例详述本发明： · 实施例 1： The present invention will be described in detail below with reference to FIG. 1 and the embodiments: Example 1:
本发明所用钛铁矿选钛尾矿为承德地区的尾矿， 其中 Ti02 品位为 6.48%, 全铁品位为 17.45%， S品位为 0.011%， V205品位为 0.024%， P品 位为 1.03%， Si02品位为 32.34%。 The ilmenite ore-selected titanium tailings used in the present invention are tailings in Chengde area, wherein the Ti0 2 grade is 6.48%, the total iron grade is 17.45%, the S grade is 0.011%, the V 2 0 5 grade is 0.024%, and the P grade is 1.03%, Si0 2 grade is 32.34%.
主要配套设备： 细筛、 球磨机、 弱磁选机、 强磁选机、 螺旋溜槽、 矿 泥摇床、 矿砂摇床等。  Main supporting equipment: fine sieve, ball mill, weak magnetic separator, strong magnetic separator, spiral chute, mineral shaker, ore shaker.
首先将钛铁矿选铁尾矿用筛孔为 1. 4讓的筛字进行筛分， 筛上产品为 沙石， 筛下产品进行弱磁选， 弱磁选磁场强度为 160 kA/m, 弱磁选精矿为 磁铁矿精矿， 弱磁选尾矿进行强磁选， 强磁选磁场强度为 900 kA/m， 强磁 选尾矿为最终尾矿， 强磁选精矿进行螺旋溜槽重选， 螺旋溜槽重选精矿为 钛铁矿粗精矿， 螺旋溜槽重选尾矿为最终尾矿。  Firstly, the ilmenite ore tailings are sieved with a sieve hole of 1.4, and the sieved product is sieved. The sieved product is subjected to weak magnetic separation, and the weak magnetic separation magnetic field strength is 160 kA/m. Weak magnetic separation concentrate is magnetite concentrate, weak magnetic separation tailings for strong magnetic separation, strong magnetic separation magnetic field strength is 900 kA/m, strong magnetic separation tailings is the final tailings, strong magnetic separation concentrate for spiral The chute is re-elected, the spiral chute re-election concentrate is ilmenite coarse concentrate, and the spiral chute re-election tailings is the final tailings.
螺旋溜槽重选的中矿进入磨矿分级作业的分级机， 分级机的粗粒级产 品给入球磨机， 球磨机磨矿后再返给分级机， 构成磨矿分级的闭路循环， 分级机的细粒级物料即为分级机溢流， 溢流细度为 -0. 074mm 占 70%， 溢流 产品给入细筛进行分级， 将物料分为 +0. 074mm和 -0. 074mm两个粒级； 将 +0. 074mm的物料给入粗粒摇床重选的矿砂摇床， 摇床坡度为 2. 5度， 给矿 的质量浓度为 35%; 将- 0. 074mm的物料给入细粒摇床重选的矿泥摇床， 摇 床坡度为 1. 5度， 给矿的质量浓度为 25%。  The re-selected middle ore of the spiral chute enters the classifier of the grinding and grading operation. The coarse-grained product of the classifier is fed into the ball mill, and the ball mill is ground and returned to the classifier to form a closed loop of the grinding grade, and the fine grain of the classifier The grade material is the grader overflow, the overflow fineness is -0. 074mm, 70%, the overflow product is graded into the fine sieve, and the material is divided into two grades of +0. 074mm and -0.774mm; The material of +0. 074mm is fed into the ore shaker re-selected by the coarse-grain shaker, the slope of the shaker is 2.5 degrees, the mass concentration of the ore is 35%; the material of -0. 074mm is fed into the fine-grain shake The bed is re-elected with a slime shaker, the slope of the shaker is 1. 5 degrees, and the mass concentration of the ore is 25%.
粗粒摇床重选的精矿和细粒摇床重选的精矿为钛铁矿粗精矿， 粗粒摇 床重选的尾矿和细粒摇床重选的尾矿为最终尾矿， 粗粒摇床重选的中矿给 入磨矿分级作业的磨矿设备进行再磨。 ·  The coarse ore shaker re-elected concentrate and fine-grain shaker re-elected concentrate is ilmenite coarse concentrate, coarse-grain shaker re-selected tailings and fine-grained shaker re-selected tailings are the final tailings The coarse ore shaker re-selected medium ore is re-grinded into the grinding equipment of the grinding classification operation. ·
经过上述技术方案， 可获得 1 02品位为 28. 15%， 产率 19. 28%的钛铁矿 粗精矿， 品位为 1. 53%， 产率为 71. 21%的尾矿， 以及产率 3. 35%的磁铁矿精 矿和产率 6. 16%的砂石。 Through the above technical solution, obtained 102 grade 28.15%, 19.28% yield of the crude ilmenite concentrate grade of 1.53 percent, a yield of 71.21% of the tailings, and 3%的石石。 The yield of 3. 35% of the magnetite concentrate and the yield of 6.16% of the sand.

Claims

权 利 要 求 书 claims
1、 一种钛铁矿选铁尾矿的预处理方法， 其特征在于， 该方法包括以下 步骤： 1. A pretreatment method for ilmenite iron beneficiation tailings, characterized in that the method includes the following steps:
( 1 ) 首先将钛铁矿选铁尾矿用筛孔为 1. 4mm的筛子进行筛分， 筛上产 品为沙石， 筛下产品进行弱磁选， 弱磁选磁场强度为 160 kA/m, 弱磁选精 矿为磁铁矿精矿， 弱磁选尾矿进行强磁选， 强磁选磁场强度为 900 kA/m， 强磁选尾矿为最终尾矿， 强磁选精矿进行螺旋溜槽重选， 螺旋溜槽重选精 矿为钛铁矿粗精矿， 螺旋溜槽尾矿为最终尾矿； (1) First, ilmenite iron dressing tailings are screened with a sieve with a mesh size of 1.4 mm. The product above the screen is sand and gravel. The product under the screen is subjected to weak magnetic separation. The magnetic field strength of the weak magnetic separation is 160 kA/m. , the weak magnetic separation concentrate is magnetite concentrate, the weak magnetic separation tailings are subjected to strong magnetic separation, the strong magnetic separation magnetic field intensity is 900 kA/m, the strong magnetic separation tailings are the final tailings, and the strong magnetic separation concentrate is carried out Spiral chute gravity separation, the spiral chute gravity separation concentrate is ilmenite coarse concentrate, and the spiral chute tailings is the final tailings;
( 2 )螺旋溜槽重选的中矿进入磨矿分级作业的分级设备， 分级设备的 粗粒级产品给入磨矿设备， 磨矿后再给入分级设备， 构成磨矿分级的闭路 循环， 分级设备的细粒级产品细度为- 0. 074mm约占 70%， 分级设备的产品 给入细筛进行分级， 将 +0. 074mm的物料给入粗粒摇床重选， 将- 0. 074mm的 物料给入细粒摇床重选； (2) The medium ore from the spiral chute gravity separation enters the grading equipment for grinding and classification operations. The coarse-grained products from the grading equipment are fed to the grinding equipment. After grinding, they are fed to the grading equipment to form a closed-circuit cycle of grinding and grading. The fineness of the fine-grained product of the equipment is -0.074mm, accounting for about 70%. The products of the classification equipment are fed into the fine screen for classification, and the +0.074mm material is fed into the coarse-grained shaker for re-selection, and -0.074mm The materials are fed into the fine-grain shaker for re-selection;
( 3 )粗粒摇床重选的精矿和细粒摇床重选的精矿为钛铁矿粗精矿， 粗 粒摇床的尾矿和细粒摇床的尾矿为最终尾矿， 粗粒摇床重选的中矿给入磨 矿分级作业的磨矿设备进行再磨； (3) The concentrate of coarse-grained shaking table gravity separation and the concentrate of fine-grained shaking table gravity separation are ilmenite coarse concentrates, and the tailings of coarse-grained shaking table and the tailings of fine-grained shaking table are final tailings. The medium ore from the coarse shaker gravity separation is fed into the grinding equipment for grinding and classification operations for regrinding;
2、 根据权利要求 1所述的一种钛铁矿选铁尾矿的预处理方法， 其特征 在于： 对于 +0. 074mm的物料给入的粗粒摇床重选的粗粒摇床为矿砂摇床， 摇床坡度为 2. 5度， 给矿的质量浓度为 35%， 对于 _0. 074mm的物料给入的 细粒摇床重选的细粒摇床为矿泥摇床， 摇床坡度为 1. 5度， 给矿的质量浓 度为 25%; ■ 2. A pretreatment method for ilmenite iron beneficiation tailings according to claim 1, characterized in that: the coarse-grained shaker gravity-selected coarse-grained shaker for +0.074mm material feed is ore Shaking table, the slope of the shaking table is 2.5 degrees, the mass concentration of the ore feed is 35%, the fine grain shaking table for re-selection of 0.074mm material is a slime shaking table, the shaking table The slope is 1. 5 degrees, and the mass concentration of the ore is 25%; ■
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