CN106248135A - A kind of non magnetic Ore is at the assay method of grind grading closed-circuit system cycle-index - Google Patents

A kind of non magnetic Ore is at the assay method of grind grading closed-circuit system cycle-index Download PDF

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CN106248135A
CN106248135A CN201610765048.0A CN201610765048A CN106248135A CN 106248135 A CN106248135 A CN 106248135A CN 201610765048 A CN201610765048 A CN 201610765048A CN 106248135 A CN106248135 A CN 106248135A
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ore
test sample
sample
index
class test
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CN106248135B (en
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包士雷
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MCC North Dalian Engineering Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for

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Abstract

A kind of non magnetic Ore, at the assay method of grind grading closed-circuit system cycle-index, belongs to grind grading technical field, this assay method, first carries out the preparation of ferromagnetism Ore standard sample and the preparation of inhomogeneity Ore test sample；By test, calculate processed in units amount Q of A class test sample respectively0Processed in units amount Qn with standard sample；And after writing down a collection of B class style of addition, the time point t that magnetic concentrate occurs1；Work as Qn/Q0When≤0.2%, all classifications of non magnetic Ore complete, and recording the time is some t, finally calculates non magnetic Ore cycle-index n=t/t in grind grading closed-circuit system1.The method simple flow, simple to operate, by changing cyclone model, cyclone to ore deposit parameter, regulation cyclone classification granularity, non magnetic Ore under obstructed granularity can be measured and use the method in grinding classification system cycle-index, be more beneficial for the systematic study into grind grading.

Description

A kind of non magnetic Ore is at the assay method of grind grading closed-circuit system cycle-index
Technical field:
The invention belongs to grind grading technical field, be specifically related to a kind of non magnetic Ore and follow in grind grading closed-circuit system The assay method of ring number of times.
Background technology:
Grinding operation is the continuation of ore reduction operation, is the important component part sorting front preparation work.Grinding machine is usual With grader with the use of, material to be processed is ground by grinding machine, and ground product is then divided into grade product and defective by grader Product, defective product returns ore mill and regrinds, and to improve grinding process, thus constitutes grind grading closed circuit.In mineral processing production Commonly used grinding attachment is ball mill, classifying equipoment use cyclone, in grind grading is closed circuit because cyclone point Stage efficiency is relatively low, and the product of qualified grain size can not be gone out timely from overflow, but returns grinding machine with the form of sand setting, another Aspect part difficulty ore grinding stone needs repeatedly to circulate in grind grading is closed circuit to generate qualified grain size product, if it is possible to measure Ore cycle-index in grinding classification system, and based on this, launch relevant process parameter and device structure test, It is easy to grinding classification system research.
Summary of the invention:
It is an object of the invention to, for the deficiencies in the prior art, it is provided that a kind of non magnetic Ore is in the closed circuit system of grind grading The assay method of system cycle-index, the method simple flow, simple to operate, use the method, grind for grind grading closed-circuit system Study carefully offer convenient, it is an object of the invention to be realized by following technical proposals:
A kind of non magnetic Ore, at the assay method of grind grading closed-circuit system cycle-index, comprises the following steps:
Step 1, prepared by ferromagnetism Ore standard sample:
(1) gather ferromagnetism Ore, crushed, as standard sample；
(2) Iron grade of bioassay standard sample, hardness and grindability, forms standard sample storehouse；
Step 2, the preparation of inhomogeneity Ore test sample:
(1) by non magnetic ore reduction to standard sample same particle sizes, as A class test sample, define every a collection of A class examination The quality testing sample is M；
(2) measure hardness and grindability, the reference standard sample library of A class test sample, choose same rigidity and grindability value Standard sample；In mass ratio, mStandard sample: mA class test sample=5:95, tests sample mix homogeneously, as B class by standard sample and A class Test sample, the quality defining every a collection of B class test sample is M；
Step 3, calculates unit interval treating capacity Q of A class test sample0:
First A class test sample being fed ball mill, starts timing, ore milling product feeds cyclone, and passes through cyclone Being formed hierarchically overflow product and underflow product, first A class test sample has processed, and records the time a little for t0；Overflow product stream Entering magnetic separator post processing to collect, underflow product returns and again carries out grind grading, the most instead together with second batch A class test sample Complex becomes closed cycle, then:
Q0=M/t0
Wherein: Q0For the unit interval treating capacity of A class test sample, t0Single batch of A class test sample institute's used time is processed for ball mill Between；
Step 4, the judgement of grind grading closed cycle balance
The unit interval treating capacity of continuous detecting cyclone overflow product, is designated as QOverflow n, when persistently detecting 3t0In time, | (QOverflow n-Q0)/Q0|≤0.2%, it is determined that grind grading closed cycle balances；
Step 5, unit interval treating capacity Qn of calculating standard sample:
(1) continue closed cycle process, a collection of B class test sample is fed ball mill, restarts timing, and observe magnetic separation Machine, when magnetic concentrate occurs in magnetic separator magnetic cylinder surface, records the time a little for t1, rise as first time grind grading closed cycle Point；
(2), during closed cycle thereafter, the A class that is of every a collection of addition ball mill tests sample, continuous detecting magnetic The unit interval treating capacity of concentrate selection, is designated as QEssence n, then:
Qn=QEssence n/β
Wherein: Qn is the Ore unit interval treating capacity of the standard sample identical with A class test sample hardness and grindability；β Iron grade for the standard sample identical with A class test sample hardness and grindability；
Step 6, cycle-index calculates:
(1) Qn/Q is worked as0When≤0.2%, record the time a little for t；
(2) non magnetic Ore is in grinding classification system cycle-index n: n=t/t1。
Wherein:
Described ferromagnetism Ore is single magnetic iron ore, and embedding cloth is uniform, in compact massive.
Described ball mill is ball tube mill.
In described step 1, below ferromagnetism ore reduction to granularity 12mm.
In described assay method, the concrete operations of grind grading are, test sample is fed ball mill, by ball mill, Producing ore milling product, ore milling product feeds cyclone by pump, and cyclone forms overflow product and underflow product.
In described assay method, overflow product passes through magnetic separator, flows into mine tailing storage ore deposit groove.
In described assay method, magnetic concentrate passes through magnetic separator, enters concentrate storage ore deposit groove.
In described step 3 (2), due to ball mill, to process the time used by single batch of A class test sample equal, so t0For ball milling Machine processes the time used by single batch of A class test sample.
In described step 5, work as Qn/Q0When≤0.2%, it is believed that all classifications of non magnetic Ore complete.
In described step 4 and step 5, unit interval treating capacity Q of cyclone overflow productOverflow nList with magnetic concentrate Bit time treating capacity QEssence nAll obtained by effusion meter detection.
Beneficial effects of the present invention:
1) non magnetic Ore can accurately be measured by the method in grind grading closed-circuit system cycle-index.
2) the method experiment process is simple, easy to operate.
3) by changing cyclone model, cyclone to ore deposit parameter in this test method, cyclone classification granularity is regulated, can Under mensuration different grain size, non magnetic Ore is in grinding classification system cycle-index.
Accompanying drawing illustrates:
Fig. 1 is the mensuration non magnetic Ore method schematic diagram in grind grading closed-circuit system cycle-index of the present invention；
Wherein, 1-ball tube mill, 2-cyclone, 3-pump, 4-magnetic separator, 5-concentrate storage ore deposit groove, 6-mine tailing storage ore deposit groove.
Detailed description of the invention:
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
As it is shown in figure 1, a kind of non magnetic Ore is at the assay method of grind grading closed-circuit system cycle-index, including following Step:
Step 1, prepared by ferromagnetism Ore standard sample:
(1) gathering ferromagnetism Ore, in ferromagnetism Ore, magnetic mineral is single magnetic iron ore, and embedding cloth is uniform, in cause Close bulk, by ferromagnetism ore reduction to below 12mm, as standard sample；
(2) Iron grade of bioassay standard sample, hardness and grindability, forms standard sample storehouse；
Step 2, the preparation of inhomogeneity Ore test sample:
(1) by non magnetic ore reduction to standard sample same particle sizes, as A class test sample, define every a collection of A class examination The quality testing sample is M；
(2) measure hardness and grindability, the reference standard sample library of A class test sample, choose same rigidity and grindability value Standard sample；In mass ratio, mStandard sample: mA class test sample=5:95, tests sample mix homogeneously, as B class by standard sample and A class Test sample, the quality defining every a collection of B class test sample is M；
Step 3, calculates unit interval treating capacity Q of A class test sample0:
First A class test sample is fed ball tube mill 1, starts timing, carry out grind grading, pass through ball tube mill 1, produce ore milling product, ore milling product feeds cyclone 2 by pump 3, is formed hierarchically overflow product and underflow product, first A Class test sample has processed, and records the time a little for t0；Overflow product passes through magnetic separator 4, flows into mine tailing storage ore deposit groove 6, underflow product Return and again carry out grind grading together with second batch A class test sample, being so concatenated to form closed cycle, then:
Q0=M/t0
Wherein: Q0Unit interval treating capacity for A class test sample；
Due to ball tube mill 1, to process the time used by single batch of A class test sample equal, so t0Process for ball tube mill 1 Time used by single batch of A class test sample；
Step 4, the judgement of grind grading closed cycle balance
The unit interval treating capacity of continuous detecting cyclone overflow product, is designated as QOverflow n, when persistently detecting 3t0In time, | (QOverflow n-Q0)/QOverflow n|≤0.2%, it is determined that grind grading closed cycle balances；
Step 5, unit interval treating capacity Qn of calculating standard sample:
(1) continue closed cycle process, a collection of B class test sample is fed ball tube mill 1, restarts timing, and see Examine magnetic separator 4, when magnetic concentrate occurs in magnetic separator 4 magnetic cylinder surface, record the time a little for t1, close as first time grind grading Road loop start；
(2), during closed cycle thereafter, the A class that is of every a collection of addition ball tube mill 1 tests sample, examines continuously Survey the unit interval treating capacity of magnetic concentrate, be designated as QEssence n, then:
Qn=QEssence n/β
Wherein: Qn is the Ore unit interval treating capacity of the standard sample identical with A class test sample hardness and grindability；β Iron grade for the standard sample identical with A class test sample hardness and grindability；
Step 6, cycle-index calculates:
(1) Qn/Q is worked as0When≤0.2%, it is believed that all classifications of non magnetic Ore complete, record the time a little for t；
(2) non magnetic Ore is in grinding classification system cycle-index n: n=t/t1。
The above is only the preferred embodiment of the present invention, by changing cyclone 2 model and rotation in this test method Ore deposit parameter given by stream device 2, regulates cyclone classification granularity, can measure non magnetic Ore under obstructed granularity and circulate at grinding classification system Number of times.It should be pointed out that, for those skilled in the art, in the premise without departing from the technology of the present invention principle Under, it is also possible to making some improvement and replacement, these improve and replace and also should be regarded as protection scope of the present invention.

Claims (4)

1. a non magnetic Ore is at the assay method of grind grading closed-circuit system cycle-index, it is characterised in that include following Step:
Step 1, prepared by ferromagnetism Ore standard sample:
(1) gather ferromagnetism Ore, crushed, as standard sample；
(2) Iron grade of bioassay standard sample, hardness and grindability, forms standard sample storehouse；
Step 2, the preparation of inhomogeneity Ore test sample:
(1) by non magnetic ore reduction to standard sample same particle sizes, as A class test sample, define every a collection of A class test sample Quality be M；
(2) measure hardness and grindability, the reference standard sample library of A class test sample, choose same rigidity and the mark of grindability value Quasi-sample；In mass ratio, mStandard sample: mA class test sample=5:95, tests sample mix homogeneously by standard sample and A class, tests as B class Sample, the quality defining every a collection of B class test sample is M；
Step 3, calculates unit interval treating capacity Q of A class test sample0:
First A class test sample being fed ball mill, starts timing, ore milling product feeds cyclone, and passes through cyclone classification Forming overflow product and underflow product, first A class test sample has processed, and records the time a little for t0；Overflow product flows into magnetic Selecting machine post processing to collect, underflow product returns and again carries out grind grading, such frequentative together with second batch A class test sample Become closed cycle, then:
Q0=M/t0
Wherein: Q0For the unit interval treating capacity of A class test sample, t0The time used by single batch of A class test sample is processed for ball mill；
Step 4, the judgement of grind grading closed cycle balance
The unit interval treating capacity of continuous detecting cyclone overflow product, is designated as QOverflow n, when persistently detecting 3t0In time, | (QOverflow n- Q0)/Q0|≤0.2%, it is determined that grind grading closed cycle balances；
Step 5, unit interval treating capacity Qn of calculating standard sample:
(1) continue closed cycle process, a collection of B class test sample fed ball mill, restarts timing, and observe magnetic separator, When magnetic concentrate occurs in magnetic separator magnetic cylinder surface, record the time a little for t1, as first time grind grading closed cycle starting point；
(2), during closed cycle thereafter, the A class that is of every a collection of addition ball mill tests sample, continuous detecting magnetic separation essence The unit interval treating capacity in ore deposit, is designated as QEssence n, then:
Qn=QEssence n/β
Wherein: Qn is the Ore unit interval treating capacity of the standard sample identical with A class test sample hardness and grindability；β is and A The Iron grade of the standard sample that class test sample hardness is identical with grindability；
Step 6, cycle-index calculates:
(1) Qn/Q is worked as0When≤0.2%, record the time a little for t；
(2) non magnetic Ore is in grinding classification system cycle-index n: n=t/t1。
Non magnetic Ore the most according to claim 1 is at the assay method of grind grading closed-circuit system cycle-index, and it is special Levying and be, the ferromagnetism Ore described in step 1 is single magnetic iron ore, and embedding cloth is uniform, in compact massive.
Non magnetic Ore the most according to claim 1 is at the assay method of grind grading closed-circuit system cycle-index, and it is special Levy and be, below the ferromagnetism ore reduction described in step 1 to granularity 12mm.
Non magnetic Ore the most according to claim 1 is at the assay method of grind grading closed-circuit system cycle-index, and it is special Levying and be, the ball mill described in step 3 is ball tube mill.
CN201610765048.0A 2016-08-30 2016-08-30 A kind of assay method of non magnetic ore in grind grading closed-circuit system cycle-index Active CN106248135B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004193A1 (en) * 1982-05-21 1983-12-08 Mag-Sep Corp. Long dwell, short drift, magnetohydrostatic centrifuge and method
US4781818A (en) * 1984-12-18 1988-11-01 Engelhard Corporation Non catalytic solid mullite/crystalline silica material and use thereof
JPH0487648A (en) * 1990-07-27 1992-03-19 Sumitomo Metal Mining Co Ltd Method for refining molybdenum ore
CN102059172A (en) * 2010-11-11 2011-05-18 攀钢集团冶金工程技术有限公司 Ore milling method for vanadium-titanium magnetite ore
CN102189038A (en) * 2011-03-22 2011-09-21 河北钢铁集团矿业有限公司 Preliminary separation process for ferromagnetic ore separation
WO2013163678A1 (en) * 2012-04-30 2013-11-07 Ausmetec Pty Ltd Recovering mineral from ore
CN103514324A (en) * 2013-09-17 2014-01-15 中华人民共和国北仑出入境检验检疫局 Method for determining grade fluctuation of delivery batch iron ores by utilization of wavelet time sequences
CN104759355A (en) * 2015-04-28 2015-07-08 中冶北方（大连）工程技术有限公司 Micro-fine particle hematite greater circulation mine returning negative ion reverse flotation technology
CN205435959U (en) * 2016-01-05 2016-08-10 马钢(集团)控股有限公司 Magnetite concentrate puies forward matter and falls miscellaneous device
CN106140401A (en) * 2016-08-30 2016-11-23 中冶北方（大连）工程技术有限公司 A kind of bat grinding machine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004193A1 (en) * 1982-05-21 1983-12-08 Mag-Sep Corp. Long dwell, short drift, magnetohydrostatic centrifuge and method
US4781818A (en) * 1984-12-18 1988-11-01 Engelhard Corporation Non catalytic solid mullite/crystalline silica material and use thereof
JPH0487648A (en) * 1990-07-27 1992-03-19 Sumitomo Metal Mining Co Ltd Method for refining molybdenum ore
CN102059172A (en) * 2010-11-11 2011-05-18 攀钢集团冶金工程技术有限公司 Ore milling method for vanadium-titanium magnetite ore
CN102189038A (en) * 2011-03-22 2011-09-21 河北钢铁集团矿业有限公司 Preliminary separation process for ferromagnetic ore separation
WO2013163678A1 (en) * 2012-04-30 2013-11-07 Ausmetec Pty Ltd Recovering mineral from ore
CN103514324A (en) * 2013-09-17 2014-01-15 中华人民共和国北仑出入境检验检疫局 Method for determining grade fluctuation of delivery batch iron ores by utilization of wavelet time sequences
CN104759355A (en) * 2015-04-28 2015-07-08 中冶北方（大连）工程技术有限公司 Micro-fine particle hematite greater circulation mine returning negative ion reverse flotation technology
CN205435959U (en) * 2016-01-05 2016-08-10 马钢(集团)控股有限公司 Magnetite concentrate puies forward matter and falls miscellaneous device
CN106140401A (en) * 2016-08-30 2016-11-23 中冶北方（大连）工程技术有限公司 A kind of bat grinding machine

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