CN101190426A - Vulcanization-oxidization mixing copper ore floatation method - Google Patents
Vulcanization-oxidization mixing copper ore floatation method Download PDFInfo
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Abstract
The invention discloses a sulfurization-oxidation mixed copper mine flotation method, comprising the steps of ore grinding and copper flotation: 20 to 50g/t of pentyl xanthic acid ethyl formate raw ore is added in the grinding process; meanwhile, a pH adjusting agent is added to lead the pH of the mine slurry to keep between 9.5 and 10.5; the invention comprises one time of fast selection, one time of coarse selection, one time of sweeping selection and three times of precise selection; in the fast selection process, 20 to 30g/t of nonyl hydroxamic acid raw ore is added and 20 to 30g/t of frother raw ore is added; in the coarse selection process, 10 to 30g/t of the pentyl xanthic acid ethyl formate raw ore and 10 to 20g/t of the nonyl hydroxamic acid raw ore as well as 10 to 20g/t of the frother raw ore are added; in the sweeping selection process, 10 to 20g/t of the nonyl hydroxamic acid raw ore is added; the pH of the flotation mine pulp is kept between 9.5 and 10.5 and the copper ore is recovered. Compared with the traditional flotation methods of copper sulphide ore and copper oxide ore, the invention improves the flotation efficiency, reduces flotation equipment and energy loss and increases the copper recovery for more than 10%.
Description
Technical field
The present invention relates to copper ore floatation, relate in particular to a kind of vulcanization-oxidization mixing copper ore floatation method.
Background technology
The copper mine reserves of China are not little, but the average grade of China's copper mine only is 0.87%, all are lower than 1% basically greater than the ultra-large type copper ore grade of 200 tons; It is complicated mineral intergrowth that most copper mine produces resource, and middle-size and small-size ore deposit is in the majority, and large ore deposit only accounts for 2.7%, and medium-sized mineral deposit accounts for 8.9%, and small-sized mineral deposit accounts for 88.4%.A sizable part belongs to the vulcanization-oxidization mixing copper ore type, has the advantages that the copper oxygenation efficiency is high and composition is complicated.And traditional copper ore floatation technology has only considered that copper-sulphide ores (comprises primary chalcopyrite, secondary vitreous copper, copper orchid etc.) flotation, and only consider to adopt activator to activate for cupric oxide ore, adopt common sulfide mineral collector to carry out flotation then, floatation process control parameter has only medicament kind concentration and slurry pH, has ignored the vulcanization-oxidization copper mineral and has mixed a series of characteristics in back.In addition, cupric oxide ore can dissolve in floatation process, need adopt efficiently that the oxide ore collecting agent mixes use with sulfide mineral collector, could improve the rate of recovery and the concentrate quality of whole copper.Therefore, adopt conventional method for floating production of copper concentrate to have problems such as the rate of recovery is low, beneficiation reagent consumption big, deficiency in economic performance.
Summary of the invention
In order to improve the efficient that vulcanization-oxidization mixing copper ore floatation separates, special proposition the present invention.
Vulcanization-oxidization mixing copper ore floatation method of the present invention may further comprise the steps:
(1) adds amyl group xanthic acid Ethyl formate 20-50g/t raw ore in the ore grinding grinding process, add pH adjustment agent simultaneously and make pH values of pulp keep 9.5-10.5;
(2) copper mineral flotation comprises once choosing soon, one roughing, once purging selection and triple cleaning.Select soon to add nonyl hydroximic acid 20-30g/t raw ore in the process, add foaming agent 20-30g/t raw ore; Add amyl group xanthic acid Ethyl formate 10-30g/t raw ore, nonyl hydroximic acid 10-20g/t raw ore in the rougher process, add foaming agent 10-20g/t raw ore; Scan in the process and to add nonyl hydroximic acid 10-20g/t raw ore, keep that pH values of pulp is 9.5-10.5 in the whole floatation process, reclaim copper mineral.
Above-mentioned ore grinding can adopt wet ball-milling, and the granularity that makes ore milling product accounts for 65～85% for-0.074mm, and ore milling product directly enters flotation without desliming.
The foaming agent that adds in the above-mentioned copper mineral flotation process can be butyl ether alcohol.
Above-mentioned pH adjusts agent can select lime for use.
Behind copper mineral flotation, can also comprise containing the flotation of a large amount of sulfide minerals such as troilite in the mine tailing.The mine tailing that the Floatation of Copper mineral are later after the process concentrator concentrates, reduces the pH value of ore pulp, adopts the sulfuric acid activation, is medicament with xanthate and No. 2 oil, and the conventional method for floating of employing reclaims troilite, obtains the sulphur concentrate.
Among the present invention, the copper flotation collector is amyl group xanthic acid Ethyl formate C
5H
11OCSSCOOC
2H
5With nonyl hydroximic acid (C
9H
19) CO (NHOH).Amyl group xanthic acid Ethyl formate is strong to copper sulfide mineral (comprising primary chalcopyrite and secondary vitreous copper, copper orchid etc.) collecting ability, to pyrite and oxidized ore collecting ability a little less than; And nonyl hydroximic acid facile hydrolysis is NH
2OH and carboxylic acid, energy and Cu
2+Ion generates compound, and is strong to the cupric oxide ore collecting ability, inoperative to gangue minerals such as calcite, quartz.
In grinding process, add amyl group xanthic acid Ethyl formate, adding pH adjustment agent simultaneously makes pH values of pulp keep 9.5-10.5, utilize this condition, the copper-sulphide ores in amyl group xanthic acid Ethyl formate and the vulcanization-oxidization mixing copper ore is had an effect, and do not react with oxide ore, pyrites; In floatation process, add the nonyl hydroximic acid, adding foaming agent again reclaims, keeping flotation pulp pH is 9.5-10.5, can change copper mineral surface and gangue mineral, iron sulfide mineral surface hydrophilic/hydrophobic property in the vulcanization-oxidization mixing copper ore like this, make gangue mineral, pyrites surface hydrophilic, and do not have an effect with flotation collector; Copper mineral (comprising copper sulfide mineral and copper oxide mineral) surface hydrophobicity can FLOTATION SEPARATION go out copper concentrate.
The traditional relatively copper-sulphide ores and the flotation technology of cupric oxide ore, the present invention adopts efficiently sulfide mineral collector amyl group xanthic acid Ethyl formate and oxide ore collecting agent nonyl hydroximic acid efficiently to be used, cancel the activator of cupric oxide ore, improved the rate of recovery and the concentrate quality of whole copper.
On flowage structure, utilize the different characteristics of copper sulfurized ore flotation rate in the mixed ore, adopt the copper rough concentrate of the method acquisition copper mineral fast-flotation of fast-flotation, obtain final copper concentrate with the cleaning technological flowasheet merging, improve flotation efficiency, reduced floatation equipment and energy consumption.To oxygenation efficiency be more than 25%, copper sulfide mineral is based on the vulcanization-oxidization mixing copper ore of chalcopyrite, adopting the present invention can obtain copper grade is 23-25%, rate of recovery 80-83% compares with conventional method, copper recovery improves more than 10%.
Description of drawings
Fig. 1: process flow diagram of the present invention.
The specific embodiment
Embodiment 1:
Use raw ore to contain the Hunan copper mine of Cu 0.91%, S 11.65%, the material phase analysis of copper mineral shows that the rate that accounts for that exists with the cupric oxide form in the copper mineral is 26.5%, and all the other are copper sulfide minerals, based on chalcopyrite.Other mineral mainly are pyrite, magnetic iron ore, magnetic iron ore etc., and gangue mineral is that quartz, calcite etc. are main.Adopt wet ball mill to carry out ball milling this mineral, make product granularity be-0.074mm accounts for about 80%, as shown in Figure 1, adds amyl group xanthic acid Ethyl formate in grinding process, addition is the 28g/t raw ore, it is 10 that the acid-base value of ore grinding system is controlled at pH.Ore milling product directly enters flotation without desliming.Flotation comprises once choosing soon, one roughing, once purging selection and triple cleaning, selects soon to add nonyl hydroximic acid 20g/t raw ore in the process, adds foaming agent 20g/t raw ore; Add amyl group xanthic acid Ethyl formate 10g/t raw ore, nonyl hydroximic acid 10g/t raw ore in the rougher process, add foaming agent 10g/t raw ore; Scan adding nonyl hydroximic acid 10g/t raw ore in the process, it is 10 that the acid-base value of flotation system is controlled at pH, carries out flotation and obtains copper concentrate, and copper grade is 23.28%, the rate of recovery 82.54%.
Embodiment 2:
Use raw ore to contain the Yunnan copper mine of Cu 1.12%, S 12.77%, the material phase analysis of copper mineral shows that the rate that accounts for that exists with the cupric oxide form in the copper mineral is 27.3%, and all the other are copper sulfide minerals, based on chalcopyrite.Other mineral mainly are pyrite, mispickel, magnetic iron ore etc., and main gangue mineral is that quartz, calcite etc. are main.Adopt wet ball mill to carry out ball milling this mineral, make product granularity be-0.074mm accounts for about 74%, as shown in Figure 1, adds amyl group xanthic acid Ethyl formate in grinding process, addition is the 40g/t raw ore, it is 9.8 that the acid-base value of ore grinding system is controlled at pH.Ore milling product directly enters flotation without desliming.Flotation comprises once choosing soon, one roughing, once purging selection and triple cleaning, selects soon to add nonyl hydroximic acid 30g/t raw ore in the process, adds foaming agent 28g/t raw ore; Add amyl group xanthic acid Ethyl formate 25g/t raw ore, nonyl hydroximic acid 20g/t raw ore in the rougher process, add foaming agent 20g/t raw ore; Scan adding nonyl hydroximic acid 20g/t raw ore in the process, it is 10 that the acid-base value of flotation system is controlled at pH, carries out flotation and obtains copper concentrate, and copper grade is 22.67%, the rate of recovery 80.33%.
Claims (6)
1. vulcanization-oxidization mixing copper ore floatation method is characterized in that: may further comprise the steps:
(1) adds amyl group xanthic acid Ethyl formate 20-50g/t raw ore in the ore grinding grinding process, add pH adjustment agent simultaneously and make pH values of pulp keep 9.5-10.5;
(2) copper mineral flotation comprises once choosing soon, one roughing, once purging selection and triple cleaning; Select soon to add nonyl hydroximic acid 20-30g/t raw ore in the process, add foaming agent 20-30g/t raw ore; Add amyl group xanthic acid Ethyl formate 10-30g/t raw ore, nonyl hydroximic acid 10-20g/t raw ore in the rougher process, add foaming agent 10-20g/t raw ore; Scan and add nonyl hydroximic acid 10-20g/t raw ore in the process; Keeping flotation pulp pH is 9.5-10.5.
2. the method for claim 1 is characterized in that: described ore grinding adopts wet ball-milling, and the granularity of ore milling product accounts for 65～85% for-0.074mm, and ore milling product directly enters flotation without desliming.
3. the method for claim 1, it is characterized in that: described foaming agent is the butyl ether alcohol.
4. the method for claim 1 is characterized in that: it is lime that described pH adjusts agent.
5. as the method one of as described in the claim 1～4, it is characterized in that: behind copper mineral flotation, also comprise flotation sulfide mineral in the mine tailing.
6. method as claimed in claim 5 is characterized in that: described mine tailing being concentrated, reduce slurry pH, adopt the sulfuric acid activation, is medicament with xanthate and No. 2 oil, adopts conventional method for floating to reclaim troilite.
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| CN101780428A (en) * | 2009-01-20 | 2010-07-21 | 江西铜业集团公司 | Method for adding lime for concentrating mill |
| CN101831559A (en) * | 2010-05-21 | 2010-09-15 | 昆明理工大学 | Flotation and metallurgy method of high-bonding-ratio carbonate gangue-type oxygen-sulfur mixed copper ore |
| CN101961673A (en) * | 2010-09-03 | 2011-02-02 | 罗光臣 | Combined concentration and smelting method for mixed copper ore |
| CN102179310A (en) * | 2010-12-23 | 2011-09-14 | 紫金矿业集团股份有限公司 | Floating process for comprehensively recycling copper separation tailings |
| CN102211060A (en) * | 2011-03-23 | 2011-10-12 | 昆明理工大学 | Activation method for flotation process of difficultly processed copper oxide ores |
| CN102218377A (en) * | 2011-02-09 | 2011-10-19 | 湖南华雄新材料有限公司 | Efficient copper-cobalt oxide ore combination collecting agent and copper oxide ore beneficiation method |
| CN102728475A (en) * | 2012-06-19 | 2012-10-17 | 昆明理工大学 | Self-activation flotation method for component of fluid inclusion of copper sulfide ore |
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| CN103143447A (en) * | 2013-01-25 | 2013-06-12 | 湖南有色金属研究院 | Beneficiation method of high-oxygenation-efficiency complicated copper ore containing co-associated metal |
| CN103386356A (en) * | 2012-05-09 | 2013-11-13 | 中国瑞林工程技术有限公司 | Flotation method for copper sulphide ore |
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| WO2015077911A1 (en) * | 2013-11-26 | 2015-06-04 | 河北联合大学 | Chalcopyrite beneficiation process and method |
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| CN105268559A (en) * | 2015-11-17 | 2016-01-27 | 紫金矿业集团股份有限公司 | Beneficiation method for low-grade copper sulphide ore |
| CN106362869A (en) * | 2016-09-23 | 2017-02-01 | 中南大学 | Application of 1,2,4-triazole-3-thioketone type flotation collecting agent |
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| CN1285416C (en) * | 2004-06-03 | 2006-11-22 | 黎东明 | Flotation method for sulfidization-oxidization mixed lead-zinc ore |
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