CN103056020A - Maximum optional size grading process for beneficiation and grinding - Google Patents
Maximum optional size grading process for beneficiation and grinding Download PDFInfo
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- CN103056020A CN103056020A CN201310012055XA CN201310012055A CN103056020A CN 103056020 A CN103056020 A CN 103056020A CN 201310012055X A CN201310012055X A CN 201310012055XA CN 201310012055 A CN201310012055 A CN 201310012055A CN 103056020 A CN103056020 A CN 103056020A
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Abstract
The invention relates to a maximum optional size grading process for beneficiation and grinding and belongs to the beneficiation, grinding and grading process. The process is characterized by including the steps of feeding ore into a ball mill by a belt, and allowing the ore flowing out of a grid plate of the ball mill to enter a cyclone from a discharge part of the ball mill for grading; returning sand returned after grading of the cyclone to an ore grinding machine, allowing overflow product generated after grading of the cyclone to enter a high-frequency vibrating screen for secondary grading, allowing maximum optional size Dxmax returned sand from the high-frequency vibrating screen and ball-milling ore discharge to enter a grit basin, using a sand pump to pump the sand and the ore discharge to the cyclone for finishing closed-loop grading cycle, and subjecting screen underflow from the high-frequency vibrating screen to floatation feeding. The process is higher in grading efficiency.
Description
Technical field
The present invention relates to the maximum optional grading technique in a kind of ore dressing, belong to the beneficiating and grinding ore grading technology.
Background technology
Have former grinding grading technique flow chart now as shown in Figure 2, weak point is: the classification efficiency of existing technique is low.
We think flotation through different grinding grading techniques to mineral material by different granularmetric composition, this different granularmetric composition is remarkable on the impact of the flotation operation rate of recovery.For example, in the Dexing copper mine floatation process, in the selected material+flotation recovery rate of 120 order grades be far smaller than in the middle of the flotation recovery rate of grade-200 order ~+400 order grades.For the relation of Study on ore granularmetric composition and sorting index, so we have invented maximum optional grading technique and have improved that ore grain size forms and sorting index.
Summary of the invention
The object of the present invention is to provide the maximum optional grading technique in a kind of beneficiating and grinding ore, this technique can improve classification efficiency.
To achieve these goals, the technical solution used in the present invention is: the maximum optional grading technique in the beneficiating and grinding ore, it is characterized in that it comprises the steps: that belt enters ball mill to the ore deposit, the mineral that flow out in the grate of ball mill enter cyclone classification (i.e. one section classification) from the discharging of ball mill; Ore mill is returned in sand return behind the cyclone classification, and the overflow product behind the cyclone classification enters high frequency shale shaker and carries out two sections classifications; Sand return and the ball milling ore discharge greater than the optional granularity Dxmax grade of maximum of high frequency shale shaker enter setting pot together, are then raised by sand pump and send into cyclone, finish closed circuit classification cycle operation, and the undersized product of high frequency shale shaker enters flotation to ore deposit (subsequent processing).
The maximum optional mesh size of high frequency shale shaker is identical with the particle diameter of maximum optional granularity Dxmax grade, and the scope of the grade of maximum optional granularity Dxmax is 0.2mm ~ 0.3mm i.e. (60 orders ~ 80 orders).
Controlling maximum optional granularity Dxmax, is on the basis of the abundant disseminated grain size characteristic of research useful metal mineral, determines the maximum optional granularity Dxmax of flotation according to test and field experience.The concept of the maximum optional granularity Dxmax of this control, namely can form maximum optional grading technique, namely the overflow product utilization high frequency fine screen for one section classification (such as the one section cyclone in Dexing) carries out classification, and undersized product enters flotation, and product returns ore grinding without exception on the sieve.
Content to ball mill ore discharging product coarse fraction and micro-size fraction is adjusted, the content of grade in the middle of improving, and then optimize flotation to the grade composition of mineral material.Ore mill is returned in sand return behind one section cyclone classification, and the overflow product behind the cyclone classification enters high frequency shale shaker and carries out two sections classifications; Sand return and the ball milling ore discharge greater than the optional granularity Dxmax grade of maximum of high frequency shale shaker enter setting pot together, are then raised by sand pump and send into cyclone, finish closed circuit classification cycle operation, and the undersized product of high frequency shale shaker enters flotation to ore deposit (subsequent processing).Controlling maximum optional granularity Dxmax, is on the basis of the disseminated grain size characteristic of fully studying the useful metal mineral, according to the maximum optional granularity Dxmax of test and the tentatively definite flotation of field experience.For the grade greater than Dxmax, then use high-effective classifying equipment (such as high frequency shale shaker) to carry out classification by granularity, it is all returned regrind, form closed circuit with ore mill.The factors such as high frequency shale shaker Dxmax value, ball mill parameter that change are carried out orthogonal test of multiple factors, consist of according to determining relatively best grinding condition combination with grade in the overflow, namely reduce coarse fraction and fine-graded content, grain size content in the middle of increasing.For the disseminated grain size of different ores, tentatively determine the maximum optional granularity Dxmax of several different flotation, determine according to result of the test which size Dxmax chooses again.
And optimum partition size forms in actual flotation, relevant to many factors such as the collecting power of ore particle, ore pulp solution chemistry character (viscosity, concentration) with the density of ore, Surface Physical Chemistry character, floating agent, therefore we think in conjunction with flotation raw ore, concentrate, mine tailing size data and count quality index and can set up a kind of appraisement system, as adopt linear fit or least square method to obtain the relation of each grade and its rate of recovery, can obtain the maximum optional granularity Dxmax of actual flotation by calculating.
Computational methods are: according to flotation raw ore, concentrate, mine tailing screen analysis result, with arithmetic mean diameter d
ArithmeticReplace particle size range, calculate the rate of recovery ε that each grade distributes in the concentrate
d, this index can fully show the recovering state of each grade in the raw ore, the rate of recovery is zero granularity in the concentrate thereby can be in order to definite maximum optional granularity Dxmax.ε
d-d
ArithmeticRelation curve can be used for optimizing the granularmetric composition of flotation, thereby provides theoretical foundation for sub-prime classification and Dxmax grading technology.
ε
dComputing formula is:
In the formula: ε
dThe rate of recovery that each grade distributes in-the concentrate;
ε
SmartThe rate of recovery of-flotation concentrate;
ε
TailThe rate of recovery of-flotation tailing.
And obtaining the maximum optional granularity Dxmax of the data that obtained by the method for linear fit, the Dxmax after recycling is determined instructs ore grinding-section classification-high frequency fine screen grading technology flow process.
Determine the maximum optional granularity Dxmax of flotation according to test and field experience: a plurality of factors such as the maximum optional granularity Dxmax of change high frequency shale shaker, ball mill parameter are carried out orthogonal test of multiple factors, consist of according to determining relatively best grinding condition combination with grade in the overflow, Khenpo granularity for different ores, the maximum optional granularity Dxmax of preliminary definite several different flotation determines according to result of the test which size maximum optional granularity Dxmax chooses again.
Can set up a kind of appraisement system in conjunction with flotation raw ore, concentrate, mine tailing size data and number quality index, as adopt linear fit or least square method to obtain the relation of each grade and its rate of recovery, can obtain the maximum optional granularity Dxmax of actual flotation by calculating.
Fig. 1 is seen in maximum optional grading technological process, and ball milling ore discharge material utilizes simultaneously high frequency fine screen to carry out the Dxmax grading technology and improved classification efficiency behind cyclone classification, has improved final flotation to the granularmetric composition in ore deposit.
The invention has the beneficial effects as follows: this technique can improve classification efficiency.
Description of drawings
Fig. 1 is process chart of the present invention.
Fig. 2 is existing former grinding grading technique flow chart.
The specific embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1(selects the Sizhou factory to grind two workshop sections):
As shown in Figure 1, maximum optional grading technique in the beneficiating and grinding ore, it comprises the steps: that belt enters ball mill to the ore deposit, it (is existing cyclone that the mineral that flow out in the grate of ball mill enter cyclone from the discharging of ball mill, herein because being one section classification, so can claim one section cyclone, or claim a step cyclone) classification (i.e. one section classification); Ore mill is returned in sand return behind the cyclone classification, and the overflow product behind the cyclone classification enters high frequency shale shaker (for existing equipment) and carries out two sections classifications; Sand return and the ball milling ore discharge greater than the optional granularity Dxmax grade of maximum of high frequency shale shaker enter setting pot together, are then raised by sand pump and send into cyclone, finish closed circuit classification cycle operation, and the undersized product of high frequency shale shaker enters flotation to ore deposit (subsequent processing).
The maximum optional mesh size of high frequency shale shaker is identical with the particle diameter of maximum optional granularity Dxmax grade.The scope of the grade of maximum optional granularity Dxmax be that (0.2mm ~ 0.3mm) is (60 orders ~ 80 orders).
And optimum partition size forms in the actual flotation, and is relevant to many factors such as the collecting power of ore particle, ore pulp solution chemistry character (viscosity, concentration) with the density of ore, Surface Physical Chemistry character, floating agent.Flotation namely+80mm) is not optional grade to ore deposit+0.2mm(in the industrial field.Therefore select maximum optional granularity Dxmax grade be 80 orders, namely the screen mesh size of high frequency shale shaker is decided to be about 0.2mm.
After carrying out commerical test, with graded index and the contrast of former grading technology index that the optional grading technology of maximum obtains, the result is as follows:
Respectively examine or check sample in the maximum optional grading technique (grading technology of the present invention), the enriched fineness situation of each sample sees Table 1-1 after screen analysis.
The enriched fineness result of maximum optional each product of grading technique of table 1-1
According to table 1-1, by newly-generated-200 order grades, we can calculate the classification efficiency of one section hydrocyclone, two sections high frequency vibrating fine screens.Wherein grind grading result of calculation sees Table 1-2.
Table 1-2: maximum optional grading technique (grading technology of the present invention) classification efficiency
| Project name | Unit/% | The 10# ball |
| Total classification efficiency | % | 62.97 |
| One section classification efficiency | % | 70.82 |
| Two sections classification efficiencies | % | 88.92 |
Respectively examine or check sample in the former grinding grading technique flow process, the enriched fineness distribution situation of each sample sees Table 1-3 after screen analysis.
The enriched fineness of former each product of grinding grading technique of table 1-3 distributes
According to table 1-3, by newly-generated-200 order grades, we can calculate the classification efficiency of one section hydrocyclone, two sections high frequency vibrating fine screens.Wherein classification efficiency result of calculation sees Table 1-4.
Table 1-4: former grinding grading technique classification efficiency
| Project name | Unit/% | 8 #Ball |
| Total classification efficiency | % | 50.01 |
| One section classification efficiency | % | 64.44 |
| Two sections classification efficiencies | % | 77.60 |
Brief summary, the total classification efficiency of maximum optional grading technique is 62.97%, one section classification efficiency 70.82%, two sections classification efficiencies 88.92%; The total classification efficiency of former grind grading is 50.01%, one section classification efficiency 64.44%, two sections classification efficiencies 77.60%.Hence one can see that, and maximum optional grading technique (grading technology of the present invention) is compared with former grinding grading technique, and the total amount classification efficiency has improved 25.92%, one section classification efficiency and improved 9.90%, two section classification efficiency and improved 14.58%.
Claims (2)
1. the maximum optional grading technique in the beneficiating and grinding ore is characterized in that it comprises the steps: that belt enters ball mill to the ore deposit, and the mineral that flow out in the grate of ball mill enter cyclone classification from the discharging of ball mill; Ore mill is returned in sand return behind the cyclone classification, and the overflow product behind the cyclone classification enters high frequency shale shaker and carries out two sections classifications; Sand return and the ball milling ore discharge greater than the optional granularity Dxmax grade of maximum of high frequency shale shaker enter setting pot together, are then raised by sand pump and send into cyclone, finish closed circuit classification cycle operation, and the undersized product of high frequency shale shaker enters flotation to the ore deposit.
2. the maximum optional grading technique in the beneficiating and grinding ore according to claim 1, it is characterized in that: the maximum optional mesh size of high frequency shale shaker is identical with the particle diameter of maximum optional granularity Dxmax grade, and the scope of the grade of maximum optional granularity Dxmax is 0.2mm ~ 0.3mm.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691538A (en) * | 2014-01-10 | 2014-04-02 | 重钢西昌矿业有限公司 | Ore grinding and classifying system and method |
| CN105327764A (en) * | 2015-12-04 | 2016-02-17 | 云南锡业股份有限公司卡房分公司 | Copper-sulfur bulk concentrate ore grinding process combining small steel forging ratio with long conical cyclone |
| CN105562192A (en) * | 2016-01-29 | 2016-05-11 | 武汉理工大学 | Ore dressing and classifying method |
| CN108763166A (en) * | 2018-04-17 | 2018-11-06 | 内蒙古科技大学 | A kind of approximating method of milling product size distribution |
| CN109550566A (en) * | 2018-10-29 | 2019-04-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | It is a kind of to reduce ore grinding energy consumption, reducing the grinding process crushed |
| CN111167595A (en) * | 2019-12-30 | 2020-05-19 | 东营方圆有色金属有限公司 | Process method for improving qualified material granularity ratio by secondary classification of cyclone of concentrating mill |
| CN113145291A (en) * | 2021-04-01 | 2021-07-23 | 山东烟台鑫泰黄金矿业有限责任公司 | Grading flash flotation process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2578833A1 (en) * | 1985-03-12 | 1986-09-19 | Eurominerali Spa | Process and plant for the preparation of a powdered product obtained from waste "E" glass fibres for textile fibres |
| CN1911525A (en) * | 2006-08-23 | 2007-02-14 | 江西华玉矿业有限公司 | Method of extracting feldspar mineral concentrate from giant grainte waste stone |
| CN101474592A (en) * | 2009-01-15 | 2009-07-08 | 长沙有色冶金设计研究院 | Coarse-size separation technique |
| CN101703961A (en) * | 2009-11-25 | 2010-05-12 | 洛阳钼都矿冶有限公司 | Novel process of molybdenum ore dressing flow |
| CN102430481A (en) * | 2011-10-19 | 2012-05-02 | 中国矿业大学 | Sorting process for high-ash and difficult-separation coal slime |
| CN102728479A (en) * | 2012-07-10 | 2012-10-17 | 河南东大矿业股份有限公司 | Treatment method for direct flotation water of bauxite |
-
2013
- 2013-01-11 CN CN201310012055XA patent/CN103056020A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2578833A1 (en) * | 1985-03-12 | 1986-09-19 | Eurominerali Spa | Process and plant for the preparation of a powdered product obtained from waste "E" glass fibres for textile fibres |
| CN1911525A (en) * | 2006-08-23 | 2007-02-14 | 江西华玉矿业有限公司 | Method of extracting feldspar mineral concentrate from giant grainte waste stone |
| CN101474592A (en) * | 2009-01-15 | 2009-07-08 | 长沙有色冶金设计研究院 | Coarse-size separation technique |
| CN101703961A (en) * | 2009-11-25 | 2010-05-12 | 洛阳钼都矿冶有限公司 | Novel process of molybdenum ore dressing flow |
| CN102430481A (en) * | 2011-10-19 | 2012-05-02 | 中国矿业大学 | Sorting process for high-ash and difficult-separation coal slime |
| CN102728479A (en) * | 2012-07-10 | 2012-10-17 | 河南东大矿业股份有限公司 | Treatment method for direct flotation water of bauxite |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691538A (en) * | 2014-01-10 | 2014-04-02 | 重钢西昌矿业有限公司 | Ore grinding and classifying system and method |
| CN105327764A (en) * | 2015-12-04 | 2016-02-17 | 云南锡业股份有限公司卡房分公司 | Copper-sulfur bulk concentrate ore grinding process combining small steel forging ratio with long conical cyclone |
| CN105562192A (en) * | 2016-01-29 | 2016-05-11 | 武汉理工大学 | Ore dressing and classifying method |
| CN108763166A (en) * | 2018-04-17 | 2018-11-06 | 内蒙古科技大学 | A kind of approximating method of milling product size distribution |
| CN108763166B (en) * | 2018-04-17 | 2021-11-19 | 内蒙古科技大学 | Fitting method for particle size distribution of crushed product |
| CN109550566A (en) * | 2018-10-29 | 2019-04-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | It is a kind of to reduce ore grinding energy consumption, reducing the grinding process crushed |
| CN111167595A (en) * | 2019-12-30 | 2020-05-19 | 东营方圆有色金属有限公司 | Process method for improving qualified material granularity ratio by secondary classification of cyclone of concentrating mill |
| CN113145291A (en) * | 2021-04-01 | 2021-07-23 | 山东烟台鑫泰黄金矿业有限责任公司 | Grading flash flotation process |
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Application publication date: 20130424 |