1500td金亭岭金矿选矿厂工艺初步设计

山东科技大学本科毕业设计（论文）

1500t/d金亭岭金矿选矿厂工艺初步设计

专 业: 矿物加工工程 姓 名: 指导教师:

摘要：本次设计参考金亭岭金矿2000t/d选矿厂的现场生产情况，初步设计了金亭岭金矿选矿厂工艺流程、设备选型、厂房配置等。根据设计任务书和现场生产指标，本次设计采用如下主要工艺流程：三段两闭路的破碎筛分流程；一段一闭路的磨矿分级流程；一次粗选二次扫选一次精选的浮选流程；金精矿采用浓缩压滤的脱水流程。本次设计选矿厂的规模为1500t/d，给矿最大粒度500mm，原矿品位为1.5g/t，原矿密度为2.8 t/m3。得到的金精矿的品位为40g/t，回收率为94.1%。车间配置如下：粗碎段的鄂式破碎机配置在原矿矿井之下，圆锥破碎机、双层圆振动筛配置在一起。磨矿分级流程，球磨机与旋流器配合。浮选流程采用充气搅拌式浮选机，闭路配置，中矿返回前一个作业，设备按照选别作业顺序依次布置。整个选矿厂设备型号适中、稳定高效、配置紧凑并且基建投资少。设计的选别流程具有稳定、易操作、选矿回收率高的优点。同时，重视环境保护和资源保护，合理利用资源。

关键词：选矿厂初步设计；破碎；磨矿；浮选；厂房配置

山东科技大学本科毕业设计（论文）

Primary Design of 1500t/d Mill of Jintingling Gold Mine

Specialty: Mineral Processing Engineering

Name : Haiying Liu Tutor:Hongguan Yu Xueqi Cui

Abstract：According to the 2000t/d mill of Jintingling gold mine, the dressing flowsheet, equipment selection, plant configuration of Jintingling gold mine mill is primarily designed. Under the design task and on-the-spot production indicators, this design adopts three sects two closed circuit in the flowsheet of comminution, one sect one closed circuit in grinding and classification, one rough two scavenger and one clean in flotation circuit. The concentrate directly dewaters by filters and thickener. The mill’s scale is 1500 tons per day and the maximal ore-feed size is 500mm.Ore-feed grade is 1.5 gram per ton. The ore density is 2.8 ton per cubic meter. The fine concentrate grade is 40 gram per ton, recovery is 94.1 per cent. Workshop configurations are as follows: the jaw crusher is arranged under the run-of-mine ore mine, cone crusher and shaking screen are arranged in the same workshop. In the process of grinding and classification，the grinding mill and the classifiers are arranged together. The flotation flowsheet choices pneumatic agitation machines with the close flotation circuits. The middlings return to the prior flotation process. The flotation separators are arranged as flow sheet. In this primary design, the equipment models selected are moderate, stable and efficient, compact configuration and less investment in infrastructure. Dressing flowsheet is stable and easy to operate with the advantages of high recovery. At the same time, this

山东科技大学本科毕业设计（论文）

primary design pays attention to resource and environmental protection, rationally utilizing mineral resources.

Keywords: primary design of the mill；comminution；grinding；flotation； plant configuration

山东科技大学本科毕业设计（论文）

目 录

1文献综述 ..................................................... 1 1.1 引言 ..................................................... 1 1.2金矿选别现状及新进展 ..................................... 1

1.2.1 金矿选别设备的发展 ................................ 1 1.2.2 金矿选矿工艺流程新进展 ............................ 3 2选矿厂设计基础资料概述 ....................................... 6 2.1设计依据及设计原则 ....................................... 6 2.2企业现状 ................................................. 6 2.2.1企业现状 .......................................... 6 2.2.2原有工艺流程及设备 ................................ 7 3设计工艺流程及指标 ........................................... 8 3.1工艺流程 ................................................. 8 3.2设计指标 ................................................. 8 3.3设计流程 ................................................. 9 4 流程计算 .................................................... 11 4.1破碎筛分流程 ............................................ 11 4.1.1破碎筛分流程计算 ................................. 11 4.1.2破碎筛分设备选择 ................................. 15 4.1.3振动筛的选择 ..................................... 18 4.2磨矿分级流程 ............................................ 19 4.2.1磨矿分级流程计算 ................................. 19 4.2.2磨矿分级设备选择 ................................. 20 4.2.3水力旋流器的选择与计算 ........................... 22 4.3.1数值量流程计算 ................................... 25 4.3.2矿浆流程计算 ..................................... 27 4.3.3浮选流程设备选择 ................................. 29 4.4浓缩、过滤设备选择计算 .................................. 31 4.4.1浓缩、过滤流程计算 ............................... 31 4.4.2浓缩机的选择 ..................................... 32 4.4.3压滤机的选择 ..................................... 33

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山东科技大学本科毕业设计（论文）

5设备配置 .................................................... 34 5.1破碎车间 ................................................ 34 5.2磨矿分级车间 ............................................ 34 5.3浮选车间 ................................................ 34 5.4过滤车间 ................................................ 35 5.5厂房总平面配置 .......................................... 35 参考文献： .................................................... 36 致谢 .......................................................... 37 设备附表 ...................................................... 38 附图 .......................................................... 43 附录1英文文献“Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate” .............. 44 附录2英文文献翻译 ............................................ 51

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山东科技大学本科毕业设计（论文）

附表8 浮选机

型号 有效容积/m 叶轮直径/mm 叶轮转速/r·min 刮板转速/r/min 充吸气量/ m·min 处理矿浆量/m·min 电动机传动型号 电动机传动功率/KW 电动机泡沫刮板型号 电动机泡沫刮板功率/KW 外形尺寸/mm 长 外形尺寸/mm 宽 外形尺寸/mm 高 3-13-1-13BS-K8 8 650 180 16～18 4～10 1～8 Y180L-6 15 Y90L-6 1.1 2250 2250 1700 附表9 浓缩机

类型 型号 主要用途 内径/m 深度/m 沉淀面积/m 池底 提耙高度/m 传动电动机功率/KW 处理量/t·d 质量/t -12中心传动 NZS-15 精尾脱水 15 3.6 176 2.5 5.5 390 13

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山东科技大学本科毕业设计（论文）

附表10 压滤机

型号 过滤面积/m 框内尺寸/mm 滤板数量/个 总过滤面积/m 滤瓶容量/L 型式 工作计示压力/MPa 电动机功率/KW 外形尺寸(长×宽×高)/mm 质量/t 滤饼厚度/mm 卸料时间/min 22XMZ-200/1200 200 1200×1200 70 200 3541 明流 0.8～1.6 5.2 8510×3200×3730 41.5 35 16

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山东科技大学本科毕业设计（论文）

附图

1 中细碎车间平面图 附图1 2 中细碎车间剖面图 附图2 3 磨矿浮选车间断面图 附图3 4 磨矿浮选车间平面图 附图4 5 设备形象联系图 6 工艺流程图 7 数质量流程图 8 矿浆流程图 9 设备明细表

附图5 附图6 附图7 附图8 附图9

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山东科技大学本科毕业设计（论文）

附录1英文文献“Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate”

The present invention involves a method for processing gold-bearing sulfide ores to facilitate recovery of gold from the sulfide ore. In particular, the present invention involves flotation processing of gold-bearing sulfide ores in a manner that reduces problems associated with conventional flotation to produce an ore concentrate. The present invention also involves the flotation processing in combination with oxidative treating, such as pressure oxidation, and use of by-product gas from an oxygen plant used to supply oxygen gas for the oxidative treating.

Significant amounts of gold are found in sulfide ores, in which the gold is associated with sulfide mineralogy. The gold is difficult to recover from such sulfide ores, because the gold is typically bound in sulfide mineral grains in a manner that renders the ore refractory to many traditional gold recovery techniques, such as direct cyanidation of the ore. Therefore, sulfide ores are commonly treated to chemically alter the sulfide mineral to permit dissolution of the gold during subsequent gold recovery operations.

One technique for treating a gold-bearing sulfide ore in preparation for gold recovery is to subject the ore to an oxidative treatment to oxidize sulfide sulfur in the sulfide minerals, thereby rendering the gold more susceptible to recovery. One method for oxidatively treating a sulfide ore is pressure oxidation, in which a slurry of the ore is subjected to oxygen gas in an autoclave at elevated temperature and pressure to decompose the sulfide

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山东科技大学本科毕业设计（论文）

mineral, freeing the gold for subsequent recovery. Other oxidative treating methods include roasting and bio-oxidation of the ore in the presence of air or oxygen gas. Treating whole ores by pressure oxidation or by oxidative roasting is expensive. Part of the expense is due to energy consumed in heating gold-barren gangue material in the whole ore, and especially the energy required to heat water in which the gangue material is slurried in the case of pressure oxidation. Also, process equipment for treating a whole ore must be sized to accommodate the throughout of gangue material, in addition to the throughput of the gold-bearing sulfide minerals, thereby significantly adding to the cost of process equipment. Moreover, side reactions may occur involving gangue material which can detrimentally affect the oxidative treating or can produce hazardous materials which require special handling. One way to reduce the high energy and process equipment costs associated with oxidative treating of a whole ore, as well as the potential for problems associated with side reactions, would be to remove gangue material from the ore prior to the oxidative treatment. For example, one method that has been used to remove gangue material from gold-bearing sulfide ores is flotation. In flotation, air is bubbled through a slurry of ore particles which have been treated with reagents and the particles of the ore which are less hydrophilic tend to attach to and rise with the air bubbles, thereby permitting separation of the ore into two fractions. Flotation has been used to prepare concentrates of gold-bearing sulfide minerals which are rich in the sulfide minerals and relatively free of gangue material. One problem with flotation of many gold-bearing sulfide ores, however, is that a significant amount of the gold-bearing sulfide mineral often reports to the wrong flotation fraction,

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