青海某金矿选冶中试厂工艺设计优化及应用

doi:10.11872/j.issn.1005-2518.2020.01.080

Abstract

Abstract:

A 30 t/d dressing and metallurgy pilot plant have been completed for a gold mine in Qinghai Province.The processing technologies of the pilot plant are flotation and gold leaching by environmental extraction agent.The pilot plant is mainly aimed at the pilot test study for gold ore dressing and metallurgy of new techniques,new materials and new technologies,new reagents and automatic control,etc. At the same time,it can carry out the flotation technology research for nonferrous metals.Mainly equipment in the pilot plant was monitored by frequency conversion,so that it can study the technical measures to improve equipment operation rate.The original design flow of the pilot plant is single,so it cannot carry out process optimization experiment research.Base on optimizing the process designs,different process test can be combination and adjustment.Through the open-circuit tests of laboratory for Huanglonggou gold ore and Shuizhadonggou gold ore in this mine,the recovery rate of the rougher flotation,the once scavenging,the second scavenging,the third scavenging for Shuizhadonggou gold ore is 80.41%,6.55%,1.47%,0.67%,and the grade of secondary cleaning concentrate is 30.40×10^-6,so the suitable flotation process for Shuizhadonggou gold ore is single stage rough two stage cleaning three stage scavenging;the recovery rate of the rough flotation,the once scavenging,the second scavenging,the third scavenging for Huanglonggou gold ore is 75.95%,3.53%,2.32%,1.52%,and the grade of rough flotation concentrate is 29.51×10^-6,so the suitable flotation process for Huanglonggou gold ore is single stage rough three stage scavenging.Based on the results of laboratory tests for these two minerals，the pilot tests were carried out in the pilot plant，which was aimed at demonstrating the results of the laboratory tests.Finally,this research result was successfully applied to the actual production of plants,the flotation process of the second plant was optimized to a single stage roughing three stage scavenging.As a result,the recovery rate of Huanglonggou gold ore is increased to 82.48% from 77.51%,more than 66.88 kg gold is additionally recovered per year,and the annual increase in production value reaches 8 834 500 yuan.

Key words: dressing-metallurgy, pilot plant, pilot test, process optimization, recovery, gold mine, Qinghai Province

CLC Number:

TD953

Fei LI,Ziqiang CHEN. Process Design Optimization and Application of a Dressing and Metallurgy Pilot Plant in Qinghai[J].Gold Science and Technology, 2020, 28(1): 142-147.

Figures/Tables 10

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References 21

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参数名称	数值	参数名称	数值
处理能力/（t·d^-1）	30	球磨磨矿浓度/%	76~78
给矿粒度/mm	-210	粗选浓度/%	28
碎矿产品粒度	-11 mm占95%	精矿含水率/%	<15
球磨分级细度	-0.074 mm占60%~85%

参数名称		黄龙沟	水闸东沟
药剂质量分数/%		28.36	28.36
细度（-0.074 mm含量占比）/%		71.54	73.83
粗选药剂用量/（g·t^-1）	Na₂CO₃	1 500	2 000
	CuSO₄	150	150
	丁铵黑药	60	80
	异戊基黄药	80	100
	11#油	30	30
扫一药剂用量/（g·t^-1）	丁铵黑药	30	40
	异戊基黄药	40	50
	11#油	15	15
扫二药剂用量/（g·t^-1）	丁铵黑药	15	20
	异戊基黄药	20	25
	11#油	8	8
扫三药剂用量/（g·t^-1）	丁铵黑药	8	10
	异戊基黄药	10	13
	11#油	4	4

作业	水闸东沟			黄龙沟
作业	品位/（×10^-6）	产率/%	回收率/%	品位/（×10^-6）	产率/%	回收率/%
原矿	2.29	100.00	100.00	2.51	100.00	100.00
精一尾	3.44	3.37	5.07	4.98	1.04	2.06
精二尾	7.27	1.09	3.46	6.95	0.94	2.60
精三尾	10.58	0.74	3.42	8.87	0.85	3.01
扫一精	3.44	4.36	6.55	4.21	2.11	3.53
扫二精	2.05	1.64	1.47	3.78	1.54	2.32
扫三精	1.56	0.98	0.67	3.02	1.26	1.52
精矿	33.54	4.67	68.46	47.26	3.62	68.28
尾矿	0.30	83.15	10.90	0.47	89.02	16.68

矿样来源	品位/（×10^-6）			产率/%	回收率/%
矿样来源	原矿	精矿	尾矿	产率/%	回收率/%
一选厂（水闸东沟）	2.31	27.84	0.45	6.79	81.84
二选厂（黄龙沟）	2.47	45.39	0.58	4.22	77.51

矿样来源	流程	品位/（×10^-6）			产率/%	回收率/%
矿样来源	流程	原矿	精矿	尾矿	产率/%	回收率/%
黄龙沟	一粗三扫	2.42	28.55	0.45	7.01	82.71
	一粗三扫一精	2.48	33.68	0.51	5.94	80.66
	一粗三扫二精	2.45	38.72	0.55	4.98	78.67
	一粗三扫三精	2.50	45.28	0.59	4.27	77.41
水闸东沟	一粗二扫二精	2.25	26.84	0.43	6.89	82.21
水闸东沟	一粗三扫三精	2.22	27.55	0.42	6.63	82.34

Process Design Optimization and Application of a Dressing and Metallurgy Pilot Plant in Qinghai

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