CN107282287B - Method for utilizing pre-factory return water of copper-molybdenum ore concentration plant - Google Patents
Method for utilizing pre-factory return water of copper-molybdenum ore concentration plant Download PDFInfo
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- CN107282287B CN107282287B CN201710705697.6A CN201710705697A CN107282287B CN 107282287 B CN107282287 B CN 107282287B CN 201710705697 A CN201710705697 A CN 201710705697A CN 107282287 B CN107282287 B CN 107282287B
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Abstract
The invention discloses a method for utilizing pre-factory return water of copper-molybdenum ore concentration. In the method for utilizing the front backwater of the copper-molybdenum ore plant, the ore dressing process of the copper-molybdenum ore plant is as follows: the method comprises the following steps that raw ores enter copper-molybdenum mixed roughing through stirring after being subjected to semi-autogenous grinding ball milling classification, then three-section mixed concentration and three-section mixed scavenging are respectively carried out, copper-molybdenum mixed concentrate is produced through the three-section mixed concentration, and total flotation tailings are produced through the three-section mixed scavenging; the concentrate of the copper-molybdenum mixed concentration enters copper-molybdenum separation flotation; the copper-molybdenum separation flotation process comprises the following steps: after copper and molybdenum separation and roughing, respectively carrying out three-stage molybdenum concentration and three-stage copper and molybdenum separation and scavenging, wherein molybdenum concentration produces molybdenum concentrate, and copper and molybdenum separation and scavenging produces copper concentrate; the return water utilization method is to change the original return water method from uniform return water to sectional return water. The invention adopts a low-cost subsection direct backwater technology, part of the wastewater is treated in a centralized way, the technical problem of recycling the polymetallic ore dressing flotation wastewater is solved, the backwater treatment investment and the production cost are greatly reduced, and the zero discharge of the wastewater is realized.
Description
Technical Field
The invention belongs to the field of polymetallic ore beneficiation process backwater and reagent utilization, and particularly relates to a method for utilizing the front backwater of a copper-molybdenum ore dressing plant.
Background
The concentration operation should be widely used in the mineral separation process, the prior application focuses on the concentration of minerals, the utilization research on overflow water is not deep enough, the traditional Chinese medicine in the backwater is not fully utilized, and the waste of the medicine and the environmental pollution are caused. With the fluctuation of the price of mineral products and the enhancement of the awareness of environmental protection, how to effectively reduce the consumption of medicaments and reduce pollution sources becomes a new idea.
The prior process flow comprises the following steps: after being subjected to semi-autogenous grinding ball milling classification, raw ores enter copper and molybdenum mixed roughing, three-section mixed concentration and three-section mixed scavenging through stirring, copper and molybdenum mixed concentrate is produced through the three-section mixed concentration, and total flotation tailings are produced through the three-section mixed scavenging; the concentrate of the copper-molybdenum mixed concentration enters copper-molybdenum separation flotation; copper and molybdenum separation and flotation: the method comprises the following steps of copper and molybdenum separation roughing, three-stage molybdenum concentration and three-stage copper and molybdenum separation scavenging, wherein molybdenum concentrate is produced by molybdenum concentration, and copper concentrate is produced by copper and molybdenum separation scavenging. And returning backwater in the operation process to the flow for use after centralized treatment. And (3) comparing tailings backwater generated according to the original process with new water tests: along with the improvement of the utilization rate of the backwater, the recovery rate of the concentrate product is averagely reduced by 2 to 3 percent. Considering how to properly utilize backwater from the perspective of environmental protection and resource utilization, reducing the influence of backwater on product indexes is a problem considered by mining workers. In addition, the main problems of the flotation process are that water cannot be directly returned, the tailing water needs to be completely treated, and the production cost is high.
The addition of the inhibitor and the activator is inevitable in the separation process of the polymetallic ores, and the flotation reagents such as partial inhibitor and activator are contained in the return water before a tailing plant or in a tailing pond, so that the mutual content of metals in mineral separation products is caused, the recovery rate is reduced, and even the products are unqualified. The traditional backwater operation of the domestic concentrating plant adopts flotation tailings to concentrate before the plant and concentrate backwater in a tailings pond, the concentration backwater is not considered in the intermediate operation, and various flotation reagents are added when flotation operation is carried out in the concentrated backwater. When the concentrated backwater is used for various flotation operations, the mutual content of metal elements in various concentrate products is increased, even harmful elements in the products exceed the standard, and the recovery rate of the metal elements in the products is reduced.
Disclosure of Invention
The invention aims to provide a stage direct water return method which is simple in process, easy to engineer, environment-friendly and energy-saving.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the method for utilizing the front backwater of the copper-molybdenum ore dressing plant comprises the following steps: the method comprises the following steps that raw ores enter copper-molybdenum mixed roughing through stirring after being subjected to semi-autogenous grinding ball milling classification, then three-section mixed concentration and three-section mixed scavenging are respectively carried out, copper-molybdenum mixed concentrate is produced through the three-section mixed concentration, and total flotation tailings are produced through the three-section mixed scavenging; the concentrate of the copper-molybdenum mixed concentration enters copper-molybdenum separation flotation; the copper-molybdenum separation flotation process comprises the following steps: after copper and molybdenum separation and roughing, respectively carrying out three-stage molybdenum concentration and three-stage copper and molybdenum separation and scavenging, wherein molybdenum concentration produces molybdenum concentrate, and copper and molybdenum separation and scavenging produces copper concentrate; the return water utilization method is to change the original return water method from uniform return water to sectional return water.
The sectional water return is as follows: the return water of the three-section mixed scavenging stage directly returns to be used as replenishing water of the mill and foam washing water of the copper-molybdenum scavenging stage; the backwater of the copper-molybdenum mixing and refining stage is used for foam washing water of the stage; the backwater in the copper-molybdenum separation flotation stage is used for supplementing water fed by a cyclone, foam flushing water in the molybdenum concentration stage and foam flushing water in the copper-molybdenum separation scavenging stage.
The invention is further illustrated below:
on the basis of fully researching various ore dressing process flows and combining with backwater using sites, backwater concentration backwater of copper-molybdenum mixed flotation tailings and backwater concentration backwater of copper-molybdenum mixed rough concentrate are adopted, the backwater of each flotation operation is respectively recycled for the flotation operation, about 89% of the backwater can be directly recycled for production, and other wastewater is subjected to low-degree treatment by adopting PH regulation, coagulating sedimentation and activated carbon adsorption. Fig. 2 is a process flow of the technical scheme. The method is characterized in that the original process is used for unifying the backwater process, and the process is changed into a sectional backwater process of the operation process according to different reagents used in the flotation operation process. The backwater of the embodiment is divided into three parts, namely: the part of the return water 1 in the copper-molybdenum mixed sorting stage directly returns to be used as the replenishing water of the mill and the washing water of the copper-molybdenum scavenging foam product, and a small amount of return water is returned to the process for use after being subjected to shallow treatment; the backwater 2 in the copper-molybdenum mixed concentration stage is concentrated backwater used for concentrate of copper-molybdenum three-section rough concentration, the backwater is used for flotation concentrate foam washing water in the operation, the backwater 3 in the copper-molybdenum separation flotation stage is used for overflow and filtered filtrate of concentrate concentration of copper concentrate and molybdenum concentrate, and the part of backwater is used for replenishing water fed by a cyclone, foam washing water of three-section flotation molybdenum concentrate and washing water of copper-molybdenum separation scavenging flotation foam products. See 1, 2, 3 in fig. 2. The total amount of the three parts of backwater accounts for about 80 percent of the total water consumption of the process.
The return water of the original flow needs to be treated and then returned to the flow for use, while the return water of the stage is the return water which is not treated and is directly used for the production flow of the stage, and is the parameters of the utilization of the return water in the period, the change parameters of the dosage of the flotation agent of the original flow, the influence on the product index and the like which are determined on the basis of the test.
In the invention, the backwater in the operation process is divided into three parts, because the three parts have different and mutually interfered reagents used for flotation, the selection index is influenced, after the stage backwater is adopted, the mutual interference among the reagents can be reduced to the maximum extent, the effective residual reagents in the stage backwater can be utilized, and the production cost is saved.
In the invention, after the stage selection, a thickening facility and a backwater facility are added, and the backwater is directly returned to the operation of the stage to be used as the supplementing water of the process of the stage. The method is characterized in that: and (5) strengthening the water return in the stage. The water return rate before the factory selection is realized to be more than 80 percent. Because the reagents used in the copper-molybdenum separation flotation are different from those used in the copper-molybdenum mixed flotation, the beneficiation reagents in the returned water in the stage operation are effectively utilized, and the production cost of a separation plant is reduced by 5-10 yuan per ton of raw ore.
The invention adopts a low-cost subsection direct backwater technology, part of the wastewater is treated in a centralized way, the technical problem of recycling the polymetallic ore dressing flotation wastewater is solved, the backwater treatment investment and the production cost are greatly reduced, and the zero discharge of the wastewater is realized.
Drawings
FIG. 1 is a diagram of an original backwater process;
FIG. 2 is a process diagram of the water return of the present invention.
In the figure: 1 in fig. 2: the backwater of the tailings is concentrated by a pre-factory thickener, then the overflow water passes through a backwater pool-a water pump-to a first stage of grinding and classifying operation, the added water as a grinding machine accounts for about 12% of the backwater amount, the added water as a classifying facility accounts for 83% of the backwater amount, the insufficient added water accounts for new water, and the part of the backwater as foam ore flushing water of the mixed scavenging operation accounts for 5% of the backwater amount of the tailings; 2 in FIG. 2: a middling thickening facility and a backwater facility are added to the foam product of the bulk concentrate, overflow water of the middling thickener accounts for 58% of flushing water required by the operation of the section, the overflow water is returned to be used as foam flushing water of the bulk concentrate, and 42% of insufficient water is supplemented by new water; 3 in FIG. 2: the overflow water of the concentrate thickener and the filtrate of the concentrate filtration are used as backwater, and the part of the added water used for diluting the underflow of the middling thickener is about 64 percent of the part of the backwater. And simultaneously, the washing water is also used as washing water of a copper-molybdenum separation flotation foam product, the consumption of the washing water is about 20 percent of that part of the return water, and the surplus of about 16 percent of the return water is used for part 1 in figure 2, and the grading facility is added with water.
Detailed Description
The method for utilizing the front backwater of the copper-molybdenum ore dressing plant comprises the following steps: the method comprises the following steps that raw ores enter copper-molybdenum mixed roughing through stirring after being subjected to semi-autogenous grinding ball milling classification, then three-section mixed concentration and three-section mixed scavenging are respectively carried out, copper-molybdenum mixed concentrate is produced through the three-section mixed concentration, and total flotation tailings are produced through the three-section mixed scavenging; the concentrate of the copper-molybdenum mixed concentration enters copper-molybdenum separation flotation; the copper-molybdenum separation flotation process comprises the following steps: after copper and molybdenum separation and roughing, respectively carrying out three-stage molybdenum concentration and three-stage copper and molybdenum separation and scavenging, wherein molybdenum concentration produces molybdenum concentrate, and copper and molybdenum separation and scavenging produces copper concentrate; the return water utilization method is to change the original return water method from uniform return water to sectional return water.
The sectional water return is as follows: the return water of the three-section mixed scavenging stage directly returns to be used as replenishing water of the mill and foam washing water of the copper-molybdenum scavenging stage; the backwater of the copper-molybdenum mixing and refining stage is used for foam washing water of the stage; the backwater in the copper-molybdenum separation flotation stage is used for supplementing water fed by a cyclone, foam flushing water in the molybdenum concentration stage and foam flushing water in the copper-molybdenum separation scavenging stage.
1 in fig. 2: the backwater of the tailings is concentrated by a pre-factory thickener, then the overflow water passes through a backwater pool-a water pump-to a first stage of grinding and classifying operation, the added water as a grinding machine accounts for about 12% of the backwater amount, the added water as a classifying facility accounts for 83% of the backwater amount, the insufficient added water accounts for new water, and the part of the backwater as foam ore flushing water of the mixed scavenging operation accounts for 5% of the backwater amount of the tailings;
2 in FIG. 2: a middling thickening facility and a backwater facility are added to the foam product of the bulk concentrate, overflow water of the middling thickener accounts for 58% of flushing water required by the operation of the section, the overflow water is returned to be used as foam flushing water of the bulk concentrate, and 42% of insufficient water is supplemented by new water;
3 in FIG. 2: the overflow water of the concentrate thickener and the filtrate of the concentrate filtration are used as backwater, and the part of the added water used for diluting the underflow of the middling thickener is about 64 percent of the part of the backwater. And simultaneously, the washing water is also used as washing water of a copper-molybdenum separation flotation foam product, the consumption of the washing water is about 20 percent of that part of the return water, and the surplus of about 16 percent of the return water is used for part 1 in figure 2, and the grading facility is added with water.
The process achieves the following effect parameters: the mutual interference among the operations of the flotation reagents is reduced, the grade of the product concentrate is improved, the beneficiation reagents are effectively utilized, and about 20% of the beneficiation reagents can be saved.
Claims (1)
1. A method for utilizing front backwater of a copper-molybdenum ore dressing plant comprises the following steps: the method comprises the following steps that raw ores enter copper-molybdenum mixed roughing through stirring after being subjected to semi-autogenous grinding ball milling classification, then three-section mixed concentration and three-section mixed scavenging are respectively carried out, copper-molybdenum mixed concentrate is produced through the three-section mixed concentration, and total flotation tailings are produced through the three-section mixed scavenging; the concentrate of the copper-molybdenum mixed concentration enters copper-molybdenum separation flotation; the copper-molybdenum separation flotation process comprises the following steps: after copper and molybdenum separation and roughing, respectively carrying out three-stage molybdenum concentration and three-stage copper and molybdenum separation and scavenging, wherein molybdenum concentration produces molybdenum concentrate, and copper and molybdenum separation and scavenging produces copper concentrate; the method is characterized in that the return water utilization method adopts sectional return water, and the sectional return water is as follows: the return water of the three-section mixed scavenging stage directly returns to be used as replenishing water of the mill and foam washing water of the copper-molybdenum scavenging stage; the backwater of the copper-molybdenum mixing and refining stage is used for foam washing water of the stage; the return water in the copper-molybdenum separation flotation stage is used for supplementing water fed by a cyclone, foam flushing water in the molybdenum concentration stage and foam flushing water in the copper-molybdenum separation scavenging stage;
12% of the concentrated backwater in the mixed scavenging stage is directly returned as the replenishing water of the mill, 83% of the concentrated backwater is used as the added water of the grading facility, and 5% of the concentrated backwater is used as the foam washing water in the copper-molybdenum scavenging stage; the concentrated backwater of the copper-molybdenum mixing and refining stage is used for foam washing water of the stage; and in the return water of the copper-molybdenum separation flotation stage, 20 percent of the return water is used for washing water of a copper-molybdenum separation flotation foam product, 64 percent of the return water is used for diluting the underflow of a middling thickener, and 16 percent of the return water is used for adding water to a grading facility, wherein the grading facility is used for grinding and grading operation.
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| CN107840424A (en) * | 2017-11-04 | 2018-03-27 | 南京银茂铅锌矿业有限公司 | A kind of method of the efficient separate-recycling of lead-zinc metallogenic belt beneficiation wastewater |
| CN109174471B (en) * | 2018-08-28 | 2020-08-11 | 北京矿冶科技集团有限公司 | Self-cleaning backwater treatment method |
| CN109604045A (en) * | 2018-11-14 | 2019-04-12 | 铜陵有色金属集团股份有限公司 | The method of lime and beneficiation reagent dosage is reduced in copper ores with high sulfur content mining production |
| CN111841876B (en) * | 2020-07-16 | 2022-08-30 | 湖南柿竹园有色金属有限责任公司 | Method for segmented recycling of copper-tin polymetallic ore beneficiation wastewater |
| CN113275129A (en) * | 2021-05-26 | 2021-08-20 | 昆明冶金研究院有限公司 | Method for utilizing mineral separation backwater of copper-molybdenum bulk concentrate |
| CN114210465A (en) * | 2021-12-14 | 2022-03-22 | 西藏华泰龙矿业开发有限公司 | Method for separating copper and molybdenum from low-grade copper-molybdenum ore by taking backwater utilization into consideration |
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| CN101695684A (en) * | 2009-10-26 | 2010-04-21 | 长沙有色冶金设计研究院 | Backwater utilizing method for ore-dressing of polymetallic ore |
| RU2539448C1 (en) * | 2013-10-17 | 2015-01-20 | Совместное предприятие в форме закрытого акционерного общества "Изготовление, внедрение, сервис" | Method for flotation treatment of flowing and aged mine refuses containing copper and molybdenum minerals |
| CN104741241A (en) * | 2013-12-25 | 2015-07-01 | 北京有色金属研究总院 | Flotation backwater utilization process of copper-sulfur or copper nickel sulfide ore in water-deficient area |
| CN103962231A (en) * | 2014-04-29 | 2014-08-06 | 西藏华泰龙矿业开发有限公司 | Method for treating wastewater generated in copper-molybdenum mineral separation process |
| CN105435953B (en) * | 2015-11-18 | 2018-02-13 | 西北矿冶研究院 | Beneficiation method for molybdenum-containing low-grade mixed copper ore |
| CN106242109B (en) * | 2016-08-11 | 2020-03-24 | 中蓝连海设计研究院有限公司 | Process for utilizing waste water generated in phosphorite direct and reverse flotation production in sections |
| CN106423584B (en) * | 2016-12-21 | 2019-07-12 | 中蓝连海设计研究院有限公司 | A kind of collophane direct reverse flotation technique that floatation process water recycles respectively |
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