CN111195563B - Preparation method and application method of inhibitor for separation of tennantite and chalcopyrite - Google Patents
Preparation method and application method of inhibitor for separation of tennantite and chalcopyrite Download PDFInfo
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- CN111195563B CN111195563B CN202010026446.7A CN202010026446A CN111195563B CN 111195563 B CN111195563 B CN 111195563B CN 202010026446 A CN202010026446 A CN 202010026446A CN 111195563 B CN111195563 B CN 111195563B
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- inhibitor
- tennantite
- chalcopyrite
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/014—Organic compounds containing phosphorus
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Abstract
The invention relates to a preparation method and an application method of an inhibitor for separation of tennantite and chalcopyrite, belonging to the technical field of copper-arsenic bulk concentrate separation and beneficiation. Firstly, preparing an acetic acid solution with the mass fraction of 5%; adding chitosan into the obtained acetic acid solution to obtain a solution I, wherein the concentration of the chitosan in the solution I is 20-80 g/L; adding sodium dimethyldithiocarbamate and amino trimethylene phosphonic acid into the solution I according to the mass ratio of 1:1, and uniformly stirring to obtain a sticky substance, wherein the content of the sodium dimethyldithiocarbamate in the sticky substance is 20-80 mg/g; drying the obtained sticky substance, and grinding to obtain the KH inhibitor. The method adopts the property that chitosan is dissolved under the acidic condition, and adds sodium dimethyldithiocarbamate and amino trimethylene phosphonic acid to prepare the KH inhibitor, thereby realizing the selective inhibition of tennantite.
Description
Technical Field
The invention relates to a preparation method and an application method of an inhibitor for separation of tennantite and chalcopyrite, belonging to the technical field of copper-arsenic bulk concentrate separation and beneficiation.
Background
Copper as a metal with strategic value plays an extremely important role in national economic construction, some existing chalcopyrite mines have high content of harmful impurity arsenic, and copper ores with high content of arsenic can be further smelted after certain treatment. Once arsenic enters the nature, the arsenic not only pollutes the environment, but also has great influence on the health of human bodies. At present, the mature copper sulfide smelting process is only suitable for materials with low arsenic content (0.3-0.5% of arsenic), when pyrometallurgy is adopted, high-arsenic copper ore and low-arsenic copper concentrate are required to be matched for smelting, the process is very complex and high in treatment cost, and the generated wastewater is extremely high in treatment difficulty. If the wet method is adopted to treat the high-arsenic sulfide ore, a large amount of high-arsenic ore pulp can be generated, and the requirement of China on environmental protection is difficult to achieve. Both of these circumstances result in the dearsenification of concentrates becoming increasingly important. Mineral separation is a necessary preparation operation for smelting, and aims to improve the quality and reduce impurities of ores. Tennantite itself has good floatability and surface properties similar to other sulfide minerals. The method for separating tennantite and chalcopyrite is adopted to reduce the content of harmful arsenic impurities in the ore, so that the harm of arsenic can be cut off from the source, and the selected arsenic concentrate can be further processed, thereby fully realizing the high-efficiency comprehensive utilization of the existing mineral resources.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides a preparation method and an application method of an inhibitor for separating tennantite and chalcopyrite. The method adopts the property that chitosan is dissolved under the acidic condition, and adds sodium dimethyldithiocarbamate and amino trimethylene phosphonic acid to prepare the KH inhibitor, thereby realizing the selective inhibition of tennantite. And then applying the KH inhibitor to the separation process of tennantite and chalcopyrite, and effectively realizing the effective separation of tennantite and chalcopyrite by adopting the processes of ore grinding, pulp mixing, medicine adding and air flotation. The invention is realized by the following technical scheme.
A method for preparing an inhibitor for separation of tennantite from chalcopyrite, comprising the steps of:
step 1, firstly, preparing an acetic acid solution with the mass fraction of 5%;
step 2, adding chitosan into the acetic acid solution obtained in the step 1 to obtain a solution I, wherein the concentration of the chitosan in the solution I is 20-80 g/L;
step 3, adding sodium dimethyldithiocarbamate and amino trimethylene phosphonic acid into the solution I obtained in the step 2 according to the mass ratio of 1:1, and uniformly stirring to obtain a sticky substance, wherein the content of the sodium dimethyldithiocarbamate in the sticky substance is 20-80 mg/g;
and 4, drying the sticky substance obtained in the step 3, and grinding to obtain the KH inhibitor.
An application method of an inhibitor prepared by a preparation method of the inhibitor for separating tennantite and chalcopyrite comprises the following steps:
placing the copper-arsenic mixed ore into a ball mill for grinding until the content of the copper-arsenic mixed ore is 70-75% when the granularity is-0.074 mm, adjusting the mass percentage concentration of the ore pulp to be 40-45%, introducing the ore pulp into a stirring barrel for adding medicine and mixing, and adding 250g of KH inhibitor into the inlet of the stirring barrel according to the amount of each ton of the ore pulp to obtain medicine-added ore pulp material; and introducing the obtained medicine-added ore pulp material into an inflatable flotation machine for rapid flotation separation, wherein a foam product of flotation is chalcopyrite, and a product at the bottom of the flotation machine is tennantite.
The pH value of ore pulp is adjusted to be 7.5-8.5 during the rapid flotation separation, and in the flotation process, a collecting agent ethyl xanthate is 40-60 g/t, and a foaming agent No. two oil is 40-60 g/t.
The invention has the beneficial effects that:
1. the KH inhibitor has stable property, and can effectively realize the separation of tennantite and chalcopyrite by matching with the processes of ore grinding, slurry mixing, medicine adding and air flotation, and reduce the arsenic content in copper concentrate.
2. The dosage of the medicament is less, and the used medicament has less pollution to the environment.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1
The preparation method of the inhibitor for separating tennantite from chalcopyrite comprises the following steps:
step 1, firstly, preparing an acetic acid solution with the mass fraction of 5%;
step 2, adding chitosan into the acetic acid solution obtained in the step 1 to obtain a solution I, wherein the concentration of the chitosan in the solution I is 20 g/L;
step 3, adding sodium dimethyldithiocarbamate and amino trimethylene phosphonic acid into the solution I obtained in the step 2 according to the mass ratio of 1:1, and uniformly stirring to obtain a sticky substance, wherein the content of the sodium dimethyldithiocarbamate in the sticky substance is 20 mg/g;
and 4, drying the sticky substance obtained in the step 3 at 50 ℃, and grinding to obtain the KH inhibitor.
The application method of the inhibitor prepared by the preparation method of the inhibitor for separating tennantite and chalcopyrite comprises the following steps:
putting copper-arsenic mixed ore (the copper content is 25.39%, the arsenic content is 3.32%, the sulfur content is 25.69%, and the iron content is 12.34%, and phase analysis shows that the mixed ore concentrate mainly exists in the form of chalcopyrite and tennantite, and a small amount of arsenopyrite, copper blue and other minerals) into a ball mill for grinding until the particle size is 70% of-0.074 mm, adjusting the mass percentage concentration of the ore pulp to 40%, introducing the ore pulp into a stirring barrel for pulp mixing, adding 250g of KH inhibitor into the inlet of the stirring barrel according to the amount of each ton of the ore pulp to obtain a drug-added ore pulp material; introducing the obtained medicated ore pulp material into an inflatable flotation machine for rapid flotation separation, wherein a foam product subjected to flotation is chalcopyrite, and a product at the bottom of the flotation machine is tennantite; and adjusting the pH value of the ore pulp to be 8 by using lime during quick flotation separation, wherein in the flotation process, a collecting agent ethyl xanthate is 50g/t, and a foaming agent No. two oil is 50 g/t.
The results of the embodiment show that the chalcopyrite and tennantite can be effectively separated by flotation under the condition of adopting the medicament, and the arsenic content of flotation concentrate is reduced to 0.31 percent to the minimum extent through once roughing, three times of scavenging and twice of concentration under the condition that the arsenic content of feeding is 3.18 percent.
Example 2
The preparation method of the inhibitor for separating tennantite from chalcopyrite comprises the following steps:
step 1, firstly, preparing an acetic acid solution with the mass fraction of 5%;
step 2, adding chitosan into the acetic acid solution obtained in the step 1 to obtain a solution I, wherein the concentration of the chitosan in the solution I is 50 g/L;
step 3, adding sodium dimethyldithiocarbamate and amino trimethylene phosphonic acid into the solution I obtained in the step 2 according to the mass ratio of 1:1, and uniformly stirring to obtain a sticky substance, wherein the content of the sodium dimethyldithiocarbamate in the sticky substance is 50 mg/g;
and 4, drying the sticky substance obtained in the step 3 at 50 ℃, and grinding to obtain the KH inhibitor.
The application method of the inhibitor prepared by the preparation method of the inhibitor for separating tennantite and chalcopyrite comprises the following steps:
placing copper-arsenic mixed ore (the copper content is 25.41%, the arsenic content is 3.12%, the sulfur content is 25.44%, and the iron content is 12.26%, and phase analysis shows that the mixed ore concentrate mainly exists in the form of chalcopyrite and tennantite, and a small amount of arsenopyrite, copper blue and other minerals) in a ball mill for grinding until the content of the ore pulp is 75% with the granularity of-0.074 mm, adjusting the mass percentage concentration of the ore pulp to 40%, introducing the ore pulp into a stirring barrel for pulp mixing, adding 250g of KH inhibitor into the inlet of the stirring barrel according to the amount of the ore pulp per ton to obtain a medicine-added ore pulp material; introducing the obtained medicated ore pulp material into an inflatable flotation machine for rapid flotation separation, wherein a foam product subjected to flotation is chalcopyrite, and a product at the bottom of the flotation machine is tennantite; and adjusting the pH value of the ore pulp to be 8 by using lime during quick flotation separation, wherein in the flotation process, a collecting agent ethyl xanthate is 40g/t, and a foaming agent No. two oil is 40 g/t.
The results of the embodiment show that the chalcopyrite and tennantite can be effectively separated by flotation under the condition of adopting the medicament, and the arsenic content of flotation concentrate is reduced to 0.32% to the minimum extent through once roughing, three times of scavenging and twice of concentration under the condition that the arsenic content of feeding is 3.12%.
Example 3
The preparation method of the inhibitor for separating tennantite from chalcopyrite comprises the following steps:
step 1, firstly, preparing an acetic acid solution with the mass fraction of 5%;
step 2, adding chitosan into the acetic acid solution obtained in the step 1 to obtain a solution I, wherein the concentration of the chitosan in the solution I is 80 g/L;
step 3, adding sodium dimethyldithiocarbamate and amino trimethylene phosphonic acid into the solution I obtained in the step 2 according to the mass ratio of 1:1, and uniformly stirring to obtain a sticky substance, wherein the content of the sodium dimethyldithiocarbamate in the sticky substance is 80 mg/g;
and 4, drying the sticky substance obtained in the step 3 at 50 ℃, and grinding to obtain the KH inhibitor.
The application method of the inhibitor prepared by the preparation method of the inhibitor for separating tennantite and chalcopyrite comprises the following steps:
placing copper-arsenic mixed ore (the copper content is 25.59%, the arsenic content is 3.25%, the sulfur content is 25.36%, and the iron content is 12.74%, and phase analysis shows that the mixed ore concentrate mainly exists in the form of chalcopyrite and tennantite, and a small amount of arsenopyrite, copper blue and other minerals) in a ball mill for grinding until the particle size is 72% of-0.074 mm, adjusting the mass percentage concentration of the ore pulp to 40%, introducing the ore pulp into a stirring barrel for pulp mixing, adding 250g of KH inhibitor per ton of ore pulp at the inlet of the stirring barrel to obtain a drug-added ore pulp material; introducing the obtained medicated ore pulp material into an inflatable flotation machine for rapid flotation separation, wherein a foam product subjected to flotation is chalcopyrite, and a product at the bottom of the flotation machine is tennantite; and adjusting the pH value of the ore pulp to be 8 by using lime during quick flotation separation, wherein in the flotation process, a collecting agent of ethyl xanthate is 60g/t, and a foaming agent of No. two oil is 60 g/t.
The results of the embodiment show that the chalcopyrite and tennantite can be effectively separated by flotation under the condition of adopting the medicament, and the arsenic content of flotation concentrate is reduced to 0.31 percent to the minimum extent through once roughing, three times of scavenging and twice of concentration under the condition that the arsenic content of feeding is 3.25 percent.
While the present invention has been described in detail with reference to the specific embodiments thereof, the present invention is not limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (3)
1. A preparation method of an inhibitor for separating tennantite from chalcopyrite is characterized by comprising the following steps:
step 1, firstly, preparing an acetic acid solution with the mass fraction of 5%;
step 2, adding chitosan into the acetic acid solution obtained in the step 1 to obtain a solution I, wherein the concentration of the chitosan in the solution I is 20-80 g/L;
step 3, adding sodium dimethyldithiocarbamate and amino trimethylene phosphonic acid into the solution I obtained in the step 2 according to the mass ratio of 1:1, and uniformly stirring to obtain a sticky substance, wherein the content of the sodium dimethyldithiocarbamate in the sticky substance is 20-80 mg/g;
and 4, drying the sticky substance obtained in the step 3, and grinding to obtain the KH inhibitor.
2. A method of using the inhibitor prepared by the method of making an inhibitor for separation of tennantite from chalcopyrite according to claim 1, comprising the steps of:
placing the copper-arsenic mixed ore into a ball mill for grinding until the content of the copper-arsenic mixed ore is 70-75% when the granularity is-0.074 mm, adjusting the mass percentage concentration of the ore pulp to be 40-45%, introducing the ore pulp into a stirring barrel for adding medicine and mixing, and adding 250g of KH inhibitor into the inlet of the stirring barrel according to the amount of each ton of the ore pulp to obtain medicine-added ore pulp material; and introducing the obtained medicine-added ore pulp material into an inflatable flotation machine for rapid flotation separation, wherein a foam product of flotation is chalcopyrite, and a product at the bottom of the flotation machine is tennantite.
3. The method for preparing the inhibitor for separation of tennantite from chalcopyrite according to claim 2, wherein the method comprises the steps of: the pH value of ore pulp is adjusted to be 7.5-8.5 during the rapid flotation separation, and in the flotation process, a collecting agent ethyl xanthate is 40-60 g/t, and a foaming agent No. two oil is 40-60 g/t.
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| GB1487411A (en) * | 1974-11-19 | 1977-09-28 | Allied Colloids Ltd | Materials and processes for flotation of mineral substances |
| JP4572703B2 (en) * | 2005-03-03 | 2010-11-04 | 住友金属鉱山株式会社 | Separation of arsenic minerals from copper concentrate |
| AU2008214151B2 (en) * | 2007-02-07 | 2012-08-02 | Cytec Technology Corp. | Novel dithiocarbamate collectors and their use in the benefication of mineral ore bodies |
| CN104785377A (en) * | 2015-05-06 | 2015-07-22 | 广西大学 | Preparation method for tennantite inhibitor |
| CN105268560A (en) * | 2015-11-13 | 2016-01-27 | 中蓝连海设计研究院 | Method for simultaneous anti-flotation of carbonate and silicate in phosphorus ore |
| CN105344488B (en) * | 2015-11-19 | 2018-08-03 | 中国地质科学院郑州矿产综合利用研究所 | Novel inhibitor for aluminosilicate minerals and application method thereof |
| CN105880007B (en) * | 2016-04-08 | 2018-03-06 | 湖南有色金属研究院 | A kind of separation method of tennantite and galena |
| CN108249694A (en) * | 2017-12-29 | 2018-07-06 | 宁波市建通环保科技有限公司 | A kind of ecological treatment method in heavy metal pollution river |
| CN110548592B (en) * | 2019-09-04 | 2021-09-14 | 中国地质科学院矿产综合利用研究所 | Beneficiation method for improving comprehensive recovery index of complex low-grade molybdenum multi-metal ore |
| CN110586331B (en) * | 2019-09-28 | 2021-05-25 | 北京矿冶科技集团有限公司 | Modified chitosan inhibitor and flotation separation method thereof |
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