CN105510181A - Method for quickly detecting total iron grades of hematite concentrates - Google Patents
Method for quickly detecting total iron grades of hematite concentrates Download PDFInfo
- Publication number
- CN105510181A CN105510181A CN201610036121.0A CN201610036121A CN105510181A CN 105510181 A CN105510181 A CN 105510181A CN 201610036121 A CN201610036121 A CN 201610036121A CN 105510181 A CN105510181 A CN 105510181A
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- ore
- grade
- iron
- concentrate
- specific gravity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
Abstract
The invention relates to a method for quickly detecting total iron grades of hematite concentrates and belongs to the technical field of iron ore detection. The method is used for detecting the total iron grade of hematite concentrates. According to the technical scheme, the method comprises the following steps: grinding the hematite raw ore into different particle sizes and sorting through a spiral chute, thereby acquiring the hematite concentrates in different grades; respectively measuring the true specific gravity of the products of hematite concentrates in different grades by using a pycnometer method; by taking the true specific gravity as a horizontal coordinate and the total iron grades of hematite concentrates as a vertical coordinate, acquiring a relation curve of the total iron grades of hematite concentrates and true specific gravity. In the production process, the hematite concentrates are sampled; the pycnometer method is used for measuring the true specific gravity; the above acquired curve can be utilized to find the corresponding total iron grades; the method is quick, simple and easy to implement; the detection result is accurate and reliable; the detection fees are ultralow; the method can be used for timely directing production; no chemical agent is used, so that the damage of chemical agents to the test personnel and environment is reduced. The method provided by the invention is an innovation in hematite concentrate detection and has obvious economic benefit and social benefit.
Description
Technical field
The present invention relates to the method for the full Iron grade of a kind of quick detection hematite concentrate, belong to Testing Techniques for Iron Ore field.
Background technology
Along with iron ore develops on a large scale, easy iron ore resource manifests worsening shortages situation gradually, standby mine is obviously not enough, many Yi Xuan iron ore mines have entered underground mining period all, ore extraction cost significantly promotes, and makes the production and operation situation of enterprise be absorbed in very difficult condition.In view of the exploitation difficulty of easy iron ore increases, cost of winning improves, and exploitation and utilization have the haematite of suitable reserves scale just to become the inevitable choice of mining industry.At present, haematite has obtained and has utilized widely, but haematite is relative to free-milling ore, mineralogical composition is complicated, technological process is long, in order to ensure the quality of concentrate product, one day class Three of normal production all needs to analyze the iron ore concentrate of sampling, chemically examine, to obtain a day production report, and timely Instructing manufacture.
Assay method at present for the full iron of iron ore concentrate mainly adopts titanium trichloride-potassium bichromate titrimetric method to measure all iron content, and the shortcoming that this method exists mainly contains:
The first, need to dissolve iron with concentrated hydrochloric acid or hydrofluorite, need to prepare mixture of sulfuric phosphoric acid with the concentrated sulphuric acid, the concentrated sulphuric acid and concentrated hydrochloric acid not only can produce adverse influence to the health of laboratory personnel simultaneously, but also can form destruction to environment;
The second, this kind of method complex procedures, length consuming time, workload are larger;
3rd, if the equal censorship measured center inspection of sample for test in process of the test, cost is higher; If oneself chemical examination, then the purchase of sulfuric acid and hydrochloric acid needs the program of process complicated.
Up to now; current employing the development of producing not only has been had a strong impact on to the iron ore concentrate of haematite full iron assay method; also environmental protection is unfavorable for; this situation one is not resolved; therefore be necessary very much a kind of simple detection method fast of invention, realize the innovation and breakthrough of the full iron assay method of iron ore concentrate.
Summary of the invention
Technical matters to be solved by this invention is to provide the method for the full Iron grade of a kind of quick detection hematite concentrate, this method dissolves titration without concentrated hydrochloric acid, the full Iron grade of indirect detection hematite concentrate is carried out by the true specific gravity measuring iron ore concentrate, the full Iron grade of the iron ore concentrate of haematite is made to detect and can implement fast, accurately, simply, so that the parameters of assorting room can be adjusted in time, real-time instruction is produced, reduce the harm to laboratory personnel and environment of concentrated hydrochloric acid and sulfuric acid simultaneously, alleviate the labour intensity of assay.
The technical scheme solved the problems of the technologies described above is:
A method for the full Iron grade of quick detection hematite concentrate, it adopts following steps to carry out:
A. 6 parts of haematite primary samples are got, put into grinding machine and carry out ore grinding, grinding particle size is respectively: first part of sample ore-200 order accounts for 40% ~ 50%, second part of sample ore-200 order accounts for 51% ~ 60%, 3rd part of sample ore-200 order accounts for 61% ~ 70%, 4th part of sample ore-200 order accounts for 71% ~ 80%, 5th part of sample ore-200 order accounts for 81% ~ 90%, 6th part of sample ore-200 order accounts for 91% ~ 100%, each grade all takes the ore of equal weight, through spiral chute sorting, carry out sample examination after the iron extract mine producation oven dry of acquisition, grade is respectively β
1, β
2β
6;
Numerical value in the grade β of the B. ore sample examination of above-mentioned size fractionated needs between 64% ~ 69%, if the Iron grade chemically examined out is all less than 64% ~ 69%, this part the iron ore concentrate sample ore sub-elected through spiral chute then getting that-200 orders account for 91% ~ 100% again through spiral chute sorting, until full Iron grade has between 64% ~ 69%;
C. use pycnometer method to measure its true specific gravity respectively to the different iron extract mine producations obtained, be respectively δ
1, δ
2δ
6;
D. with true specific gravity (kg/m
3) be horizontal ordinate, with iron concentrate grade (%) for ordinate, draw the relation curve of iron concentrate grade-true specific gravity;
E. in process of production, to hematite concentrate sampling, adopt pycnometer method to measure its true specific gravity, utilize the curve of above-mentioned acquisition can find corresponding iron concentrate grade;
F. when the ore properties of haematite changes, repeat steps A, B and C, obtain the true specific gravity and grade that are consistent with this hematite ore character, then repeat step D and E, the grade of corresponding iron ore concentrate can be found according to the true specific gravity of iron ore concentrate.
The method of the full Iron grade of above-mentioned detection hematite concentrate, in described steps A, the ore of size fractionated takes weight is 3000 ~ 5000g, through spiral chute sorting 2 ~ 4 times.
The invention has the beneficial effects as follows:
The present invention detects by the iron ore of size fractionated the relation curve obtaining iron concentrate grade-true specific gravity fast, in actual production, the grade of corresponding iron ore concentrate can be found by the relation curve of iron concentrate grade-true specific gravity according to the true specific gravity of the haematite of actual measurement.
The method of the full Iron grade of detection hematite concentrate of the present invention is simple fast, only uses pycnometer, balance, and accurately and reliably, detect degree of accuracy high, testing cost is extremely low, and detection time is short, can be used in timely Instructing manufacture for testing result.
The method of the full Iron grade of detection hematite concentrate of the present invention does not use any chemical agent, pollution-free, does not have the discharge of acid waste liquid, decreases and detects the harm to laboratory personnel and environment of strong acid chemical reagent in classic method, alleviate the labour intensity of assay.
The present invention is the innovation during iron ore concentrate detects by the grade of the true specific gravity indirect detection iron ore concentrate of measurement iron ore concentrate, a kind of brand-new method is provided for detecting the full Iron grade of hematite concentrate, the full Iron grade of the iron ore concentrate of haematite is made to detect and can implement fast, accurately, simply, to reach the parameters of adjustment assorting room in time, the object that real-time instruction is produced, has significant economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the concentrate grade of embodiment 1 and the graph of relation of true specific gravity;
Fig. 2 is the concentrate grade of embodiment 2 and the graph of relation of true specific gravity;
Fig. 3 is the concentrate grade of embodiment 3 and the graph of relation of true specific gravity.
Embodiment
The present invention is the method for the full Iron grade of a kind of quick detection hematite concentrate, and it adopts following steps to carry out:
A. 6 parts of haematite primary samples are got, put into grinding machine and carry out ore grinding, grinding particle size is respectively: first part of sample ore-200 order accounts for 40% ~ 50%, second part of sample ore-200 order accounts for 51% ~ 60%, 3rd part of sample ore-200 order accounts for 61% ~ 70%, 4th part of sample ore-200 order accounts for 71% ~ 80%, 5th part of sample ore-200 order accounts for 81% ~ 90%, 6th part of sample ore-200 order accounts for 91% ~ 100%, each grade all takes the ore of equal weight, through spiral chute sorting, carry out sample examination after the iron extract mine producation oven dry of acquisition, grade is respectively β
1, β
2β
6.
Numerical value in the grade β of the B. ore sample examination of above-mentioned size fractionated needs between 64% ~ 69%, if the Iron grade chemically examined out is all less than 64% ~ 69%, this part the iron ore concentrate sample ore sub-elected through spiral chute then getting that-200 orders account for 91% ~ 100% again through spiral chute sorting, until full Iron grade has between 64% ~ 69%.
C. use pycnometer method to measure its true specific gravity respectively to the different iron extract mine producations obtained, be respectively δ
1, δ
2δ
6;
D. with true specific gravity (kg/m
3) be horizontal ordinate, with iron concentrate grade (%) for ordinate, draw the relation curve of iron concentrate grade-true specific gravity;
E. in process of production, to hematite concentrate sampling, adopt pycnometer method to measure its true specific gravity, utilize the curve of above-mentioned acquisition can find corresponding iron concentrate grade;
F. when the ore properties of haematite changes, repeat steps A, B and C, obtain the true specific gravity and grade that are consistent with this hematite ore character, then repeat step D and E, the grade of corresponding iron ore concentrate can be found according to the true specific gravity of iron ore concentrate.
Embodiment 1
The present embodiment raw ore used is certain hematite separation factory raw ore, and full Iron grade is 29.45%.
Get 6 parts of haematite primary samples, put into grinding machine and carry out ore grinding, grinding particle size is respectively: first part of sample ore-200 order accounts for 47.23%, second part of sample ore-200 order accounts for 55.18%, 3rd part of sample ore-200 order accounts for 62.37%, 4th part of sample ore-200 order accounts for 74.83%, and the 5th part of sample ore-200 order accounts for 88.24%, and the 6th part of sample ore-200 order accounts for 97.36.Each grade all takes 3500g, and through spiral chute sorting 2 times, carry out sample examination after the iron extract mine producation oven dry of acquisition, grade is respectively 46.39%, 50.32%, 58.12%, 62.70%, 65.76%, 66.24%.
Use pycnometer method to measure its true specific gravity respectively to the different iron extract mine producations obtained, be respectively 3.85 × 10
3kg/m
3, 4.12 × 10
3kg/m
3, 4.37 × 10
3kg/m
3, 4.51 × 10
3kg/m
3, 4.67 × 10
3kg/m
3, 4.73 × 10
3kg/m
3.
With true specific gravity (kg/m
3) be horizontal ordinate, with iron concentrate grade (%) for ordinate, draw the relation curve of iron concentrate grade-true specific gravity, see Fig. 1.
In process of production, to hematite concentrate sampling, adopting pycnometer method to measure its true specific gravity is 4.65 × 10
3kg/m
3, by looking into Fig. 1 curve, then can learn that the full Iron grade of iron ore concentrate is now 65.52%.
Embodiment 2
The present embodiment raw ore used is certain hematite separation factory raw ore, and full Iron grade is 21.78%.
Get 6 parts of haematite primary samples, put into grinding machine and carry out ore grinding, grinding particle size is respectively: first part of sample ore-200 order accounts for 41.58%, second part of sample ore-200 order accounts for 54.31%, 3rd part of sample ore-200 order accounts for 64.14%, 4th part of sample ore-200 order accounts for 72.36%, and the 5th part of sample ore-200 order accounts for 85.71%, and the 6th part of sample ore-200 order accounts for 94.59%.Each grade all takes 4000g, and through spiral chute sorting 3 times, carry out sample examination after the iron extract mine producation oven dry of acquisition, grade is respectively 39.94%, 48.15%, 56.78%, 61.49%, 64.35%, 67.18%.
Use pycnometer method to measure its true specific gravity respectively to the different iron extract mine producations obtained, be respectively 3.47 × 10
3kg/m
3, 3.91 × 10
3kg/m
3, 4.25 × 10
3kg/m
3, 4.48 × 10
3kg/m
3, 4.60 × 10
3kg/m
3, 4.82 × 10
3kg/m
3.
With true specific gravity (kg/m
3) be horizontal ordinate, with iron concentrate grade (%) for ordinate, draw the relation curve of iron concentrate grade-true specific gravity, see Fig. 2.
In process of production, to hematite concentrate sampling, adopting pycnometer method to measure its true specific gravity is 4.58 × 10
3kg/m
3, by looking into Fig. 2 curve, then can learn that the full Iron grade of iron ore concentrate is now 64.30%.
Embodiment 3
The present embodiment raw ore used is certain hematite separation factory raw ore, and full Iron grade is 32.47%.
Get 6 parts of haematite primary samples, put into grinding machine and carry out ore grinding, grinding particle size is respectively: first part of sample ore-200 order accounts for 45.21%, second part of sample ore-200 order accounts for 57.56%, 3rd part of sample ore-200 order accounts for 66.37%, 4th part of sample ore-200 order accounts for 74.18%, and the 5th part of sample ore-200 order accounts for 88.45%, and the 6th part of sample ore-200 order accounts for 99.23%.Each grade all takes 4000g, and through spiral chute sorting 3 times, carry out sample examination after the iron extract mine producation oven dry of acquisition, grade is respectively 48.41%, 52.15%, 58.64%, 63.49%, 66.37%, 67.75%.
Use pycnometer method to measure its true specific gravity respectively to the different iron extract mine producations obtained, be respectively 3.94 × 10
3kg/m
3, 4.11 × 10
3kg/m
3, 4.36 × 10
3kg/m
3, 4.51 × 10
3kg/m
3, 4.78 × 10
3kg/m
3, 4.91 × 10
3kg/m
3.
With true specific gravity (kg/m
3) be horizontal ordinate, with iron concentrate grade (%) for ordinate, draw the relation curve of iron concentrate grade-true specific gravity, see Fig. 3.
In process of production, to hematite concentrate sampling, adopting pycnometer method to measure its true specific gravity is 4.52 × 10
3kg/m
3, by looking into Fig. 3 curve, then can learn that the full Iron grade of iron ore concentrate is now 66.40%.
Claims (2)
1. detect a method for the full Iron grade of hematite concentrate, it is characterized in that: it adopts following steps to carry out:
A. 6 parts of haematite primary samples are got, put into grinding machine and carry out ore grinding, grinding particle size is respectively: first part of sample ore-200 order accounts for 40% ~ 50%, second part of sample ore-200 order accounts for 51% ~ 60%, 3rd part of sample ore-200 order accounts for 61% ~ 70%, 4th part of sample ore-200 order accounts for 71% ~ 80%, 5th part of sample ore-200 order accounts for 81% ~ 90%, 6th part of sample ore-200 order accounts for 91% ~ 100%, each grade all takes the ore of equal weight, through spiral chute sorting, carry out sample examination after the iron extract mine producation oven dry of acquisition, grade is respectively β
1, β
2β
6;
Numerical value in the grade β of the B. ore sample examination of above-mentioned size fractionated needs between 64% ~ 69%, if the Iron grade chemically examined out is all less than 64% ~ 69%, this part the iron ore concentrate sample ore sub-elected through spiral chute then getting that-200 orders account for 91% ~ 100% again through spiral chute sorting, until full Iron grade has between 64% ~ 69%;
C. use pycnometer method to measure its true specific gravity respectively to the different iron extract mine producations obtained, be respectively δ
1, δ
2δ
6;
D. with true specific gravity (kg/m
3) be horizontal ordinate, with iron concentrate grade (%) for ordinate, draw the relation curve of iron concentrate grade-true specific gravity;
E. in process of production, to hematite concentrate sampling, adopt pycnometer method to measure its true specific gravity, utilize the curve of above-mentioned acquisition can find corresponding iron concentrate grade;
F. when the ore properties of haematite changes, repeat steps A, B and C, obtain the true specific gravity and grade that are consistent with this hematite ore character, then repeat step D and E, the grade of corresponding iron ore concentrate can be found according to the true specific gravity of iron ore concentrate.
2. the method for the full Iron grade of detection hematite concentrate according to claim 1, is characterized in that: in described steps A, the ore of size fractionated takes weight is 3000 ~ 5000g, through spiral chute sorting 2 ~ 4 times.
Priority Applications (1)
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|---|---|---|---|
| CN201610036121.0A CN105510181B (en) | 2016-01-20 | 2016-01-20 | A kind of method of the quick full Iron grade of detection hematite concentrate |
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|---|---|---|---|
| CN201610036121.0A CN105510181B (en) | 2016-01-20 | 2016-01-20 | A kind of method of the quick full Iron grade of detection hematite concentrate |
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| CN105510181B CN105510181B (en) | 2018-09-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631955A (en) * | 2017-09-07 | 2018-01-26 | 北京矿冶研究总院 | Method for estimating iron grade in strip-shaped magnet quartzite iron ore by using true density |
| CN113281210A (en) * | 2021-04-26 | 2021-08-20 | 安徽金日晟矿业有限责任公司 | Method for rapidly detecting grade of iron ore concentrate |
| CN113340770A (en) * | 2021-04-26 | 2021-09-03 | 安徽金日晟矿业有限责任公司 | Device and method for detecting grade of magnetite and specularite mixed iron concentrate |
Citations (2)
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| US20150048009A1 (en) * | 2013-08-19 | 2015-02-19 | Vhip Llc | System and Method For Iron Ore Reclaiming From Tailings Of Iron Ore Mining Operations |
| CN204461938U (en) * | 2014-12-19 | 2015-07-08 | 中冶集团武汉勘察研究院有限公司 | A kind of iron ore grade automatic checkout system |
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2016
- 2016-01-20 CN CN201610036121.0A patent/CN105510181B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150048009A1 (en) * | 2013-08-19 | 2015-02-19 | Vhip Llc | System and Method For Iron Ore Reclaiming From Tailings Of Iron Ore Mining Operations |
| CN204461938U (en) * | 2014-12-19 | 2015-07-08 | 中冶集团武汉勘察研究院有限公司 | A kind of iron ore grade automatic checkout system |
Non-Patent Citations (1)
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| 李连英: ""浸没式密度计于在流品位分析中的应用"", 《云南冶金》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631955A (en) * | 2017-09-07 | 2018-01-26 | 北京矿冶研究总院 | Method for estimating iron grade in strip-shaped magnet quartzite iron ore by using true density |
| CN113281210A (en) * | 2021-04-26 | 2021-08-20 | 安徽金日晟矿业有限责任公司 | Method for rapidly detecting grade of iron ore concentrate |
| CN113340770A (en) * | 2021-04-26 | 2021-09-03 | 安徽金日晟矿业有限责任公司 | Device and method for detecting grade of magnetite and specularite mixed iron concentrate |
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| CN105510181B (en) | 2018-09-28 |
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Address after: 063210 Tangshan City Road, Tangshan, Hebei Bay ecological city, Bohai Avenue, No. 21 Applicant after: NORTH CHINA University OF SCIENCE AND TECHNOLOGY Address before: Xinhua Xidao 063000 Hebei province Tangshan City Lunan District No. 46 Applicant before: NORTH CHINA University OF SCIENCE AND TECHNOLOGY |
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