1、某铅锌矿年处理35万吨矿石选矿厂设计摘要:按照毕业设计任务书的要求,进行了铅锌矿年处理35万吨矿石选矿厂设计,产品为铅精矿和锌精矿。在收集类似铅锌矿选矿厂相关设计资料的基础上,确定了各车间的工作制度,对设计工艺流程进行了选择和论证,确定了设计的工艺流程,即:破碎采用三段一闭路流程;磨矿采用二段一闭路流程;浮选中铅循环采用二次粗选,四次精选,一次扫选的流程作业,锌循环采用一次粗选,三次精选,一次扫选的流程作业;精矿采用先浓缩后过滤的两段脱水工艺流程。对设计工艺流程进行了工艺指标计算,包括破碎、筛分、磨矿、浮选和矿浆流程。对破碎、筛分、磨矿、分级、浮选及脱水设备进行了选择和计算,确定了工艺所需的工
2、艺设备。设计还进行了厂房的总体布置,并进行了厂房内的设备配置。根据选厂的地形条件,沿山坡地布置,其中,粗碎、中细碎、筛分厂房分开布置。磨矿浮选共厂房配置,其中磨矿采用纵向配置,浮选机采用横向配置。浓缩机配置在露天,过滤机与精矿仓配置在厂房内。完成了原则流程图、数质量及矿浆流程图、设备形象联系图、破碎筛分、磨浮、脱水车间平断面图共5张图纸。关键词:铅锌矿 选矿厂设计 浮选The Design of One Lead-zinc Mine Concentrating Mill With the Capacity of 35,000 t/aAbstract: In accordance with th
3、e requirements of the the graduate design task book, the lead-zinc-year mine concentrating mill With the Capacity of 35,000 t/a processing plant design, product lead concentrate and zinc concentrate.On the basis of collecting data from in the lead-zinc concentrator , The work institutions of each wo
4、rk were determined, and the technological process was also chosen and reasoned. The process of crushing is three sections with one closed circuit, the grinding process is one sections with one closed circuit, flotation of lead circulating using two state rougher,four states cleaner ,one states scave
5、nger, flotation of zinc circulating one state rougher,three states cleaner ,one states scavenger; a process with two sections dewatering circuit which includes concentration and filtration were adoptedParameters of crushing, screening, grinding, flotation (including the circuit of pulp) and dewateri
6、ng were computed respectively. Then the technological parameters of equipments were calculated,the schemes of equipments were compared and the optimal equipments were determined.The general arrangement of concentrating mill and the allocation of equipments in diferent workshops were presented. Accor
7、ding to the topography of the plant site, the plant was set along the slope of mountain. The workshops of coarse crushing、middle crushing and fine crushing and screening were set independently. The workshops of coarse crushing、middle crushing、fine crushing and screening workshops are parallel to con
8、tour line. The workshops of grinding and flotation were put together, and the longitudinal and lateral plans were used for the mill and flotation machines respectively. The concentrate machines were separated from the filtering workshop and concentrate bins were allocated inside. Five pieces of draw
9、ing, the workshops of crushing, screening, grinding, flotation, dewatering, Pulp flow chart and the connection of equipments were finished.Keywords: Lead-zinc mine, concentrator design, flotation目录1 绪论11.1 厂址选择11.2矿石性质和矿石类型12 工艺流程的选择和计算32.1选矿厂工作制度、设备作业率和处理量的确定32.1.1 选矿厂工作制度和设备作业率32.1.2 处理量的计算42.2 破碎
10、流程的选择和计算52.2.1 破碎流程的选择52.2.2破碎流程计82.3磨矿流程的选择和计算132.3.1 磨矿流程的选择132.3.2 磨矿流程的计算142.4选别流程的选择和计算152.5矿浆流程的选择和计算323 选矿设备的选择和计算423.1破碎设备的选择和计算423.2筛分设备的选择和计算453.3磨矿设备的选择和计算473.4分级设备的选择和计算503.5浮选设备的选择和计算513.6脱水设备的选择和计算583.6.1浓缩机的选择和计算583.6.2过滤机的选择和计算593.7主要辅助设备、矿仓的选择和计算593.7.1给矿设备593.7.2起重设备603.7.3胶带运输机613
11、.7.4矿仓634总体布置与设备配置674.1总体布置674.2厂内设备配置674.3破碎厂房的设备配置684.4磨浮车间设备配置684.5脱水车间设备配置684.6设计图纸69附录:设备选择附表70参考文献73谢 辞74iv1 绪论本设计为某铅锌矿选矿厂,按照设计任务书的要求,毕业设计题目是:某铅锌矿年处理35万吨矿石选矿厂设计,属于工程设计。设计的选厂处理量为35万吨/年,选矿产品为铅精矿和锌精矿。设计的选厂位于湖南。1.1 厂址选择该铅锌矿属有色金属矿山,选厂原矿运输量大,精矿运输量小,故因地制宜,就矿建厂,厂址选择在山坡上,有如下优点:1) 选厂不在矿体上,塌落界限和爆破危险区内2)
12、工程地质较好3)场址大,总面积布置条件好4)距尾砂池近,生产前期的尾砂可以自流5)充分利用山地、荒地,占田少,不妨碍农田水利建设6)供水管路较短7)厂址位于生活区下风向,离生活区近,既有利于生产又方便生活1.2矿石性质和矿石类型该铅锌矿属于中深条件下的高温到中温热液矿床,矿床工业类型属碳酸盐中的裂隙充填和交代矿床。矿体多产于火成岩和石灰岩的接触带附近或破碎带中,在火成岩、灰岩、砂页岩中均有存在,但主要富集于灰岩中。铅锌矿物种类复杂,金属矿物主要有方铅矿、闪锌矿、黄铜矿、黄铁矿,其次为少量白铁矿、砷黄铁矿、磁黄铁矿、黝锡矿,另外还伴生有辉铋矿、辉钼矿、辉银矿及稀有元素镓、铟、锗、镉等。脉石矿物主
13、要为方解石、石英,其次为白云石、绢云母、绿泥石和萤石等。矿床中方铅矿的金属量由上而下逐渐减少,闪锌矿逐渐增多。铅锌矿绝大部分为原生矿,仅南部矿区上部有少量氧化矿。矿石构造比较复杂,有致密块状、浸染状、角砾状、细脉状和条带状等,其中以致密状为主。矿石嵌布特性属中细粒不均匀嵌布,有用矿之间共生密切。铅锌矿石的自然类型:按矿物成分可分为铅锌矿石、锌矿石、铅矿石、铜矿石、铜锌矿石。按矿石的氧化程度可分为氧化矿石和原生硫化物矿石。氧化矿石主要分布于西部和浅部,原生硫化物矿石分布于中部及深部;按矿石构造可分为块状矿石、角砾铅锌矿石、条带状铅锌混合矿石;按品级可分为:贫矿石、富矿石及中等矿石。矿石的工业类型
14、划分:全区铅锌矿石只要品位够工业要求的都能够为工业利用,都为易选矿石,全区皆可划分为铅锌混合矿石。无论开采或选矿流程都不能截然分开,所以划分工业类型意义不大,故只划分一种工业类型,即硫化混合铅锌矿石。铜矿石尚未利用。从已有的选矿试验来看,铜锌矿石中铜的回收会影响到锌的回收,可初步划分为铜矿石和铜锌矿石两种类型。 原矿多元素分析结果见下表1-1表1-1 原矿多元素分析结果(%)元素PbZnSAgCuSiO2Al2O3SnMn含量3.266.6818.82640.1418.963.320.141.5元素FeAsMgOCuOSbCBiAuTiO2含量15.40.263.0512.090.063.81
15、0.020.190.1矿石物质成分研究表明,铅矿物氧化率高,锌矿物以闪锌矿物为主(含铁高达17.56%),是影响铅回收率和锌质量提高的主要原因。各个主要矿物及其特征如下: (1)方铅矿:方铅矿石中主要的铅矿物,约占总铅的88%(其他为氧化铅矿物),主要成粒状不规则集合体产出,粒径大于0.043mm的占91% (2)矿石中的硫化锌矿物主要是铁闪锌矿,含Zn大约47.23% ,Fe大约17.5%, S大约34.63%。铁闪锌矿与闪锌矿的比例约为96:4。闪锌矿属中细粒嵌布,粒径大于0.043mm的占86.3%。 (3)黄铜矿约占铜矿物总量的90%,其次有辉铜矿、斑铜矿、铜兰等。黄铜矿粒度较细,大于0.043mm的只占54.5%。 (4)硫铁矿一般成他型半自形粒状,嵌布粒度相对较粗,主要在0.040.2mm之间。 (5)锡石约占总锡的82.55%,其次为胶态锡和硫化锡。锡石被其他硫化物及闪石交代,嵌布粒度较小,主要在0.0740.005之间。2 工艺流程的选择和计算2.1选矿厂工作制度、设备作业率和处理量的确定2.1.1 选矿厂工作制度和设备作业率