CN103472204B - Method for detecting ash content of floatation products - Google Patents
Method for detecting ash content of floatation products Download PDFInfo
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- CN103472204B CN103472204B CN201310463286.2A CN201310463286A CN103472204B CN 103472204 B CN103472204 B CN 103472204B CN 201310463286 A CN201310463286 A CN 201310463286A CN 103472204 B CN103472204 B CN 103472204B
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- yield
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Abstract
The invention discloses a method for detecting the ash content of flotation products, belongs to the technical field of coal dressing methods, and aims to calculate the ash content of the flotation products according to the floatation clean coal yield and the tailing yield. According to the technical scheme, a flow meter and a densimeter are installed on a floatation feed and floatation tailing pipeline, the feed density, the feed flow, the tailing density and the tailing flow of detected products are detected, the clean coal yield and the tailing yield of the detected products are calculated; a relation curve of the statistic flotation clean coal yield and the ash content and a relation curve of the tailing yield and the ash content of coal quality are respectively drawn by the combination of laboratory statistic data of the products, and the clean coal ash content and the tailing ash content of the detected products are calculated according to the curves and the clean coal yield and the tailing yield of the detected products. The method has the advantages of being simple, rapid, convenient to conduct and accurate, is a brand new detection method and creativeness in the field of floatation ash content detection methods, and has great value and significance, and by the adoption of the method, China is made to be at the forefront of the world in the field of the floatation ash content detection methods.
Description
Technical field
The present invention relates to a kind of floating product ash content detection method, particularly one and can pass through floatation clean coal productive rate and tail coal productive rate, calculate the method for product ash content, belong to coal preparation method technical field.
Background technology
Flotation is under the effect of medicament, according to the difference of mineral surface character, realizes the object of valuable mineral and useless minerals separation.The important indicator weighing flotation is cleans ash and tail coal ash content, and cleans ash must control in certain scope, and tailings ash content also must reach certain level.The measurement of current coal preparation plant to cleaned coal and tail coal ash content is generally adopt these three steps of sampling-sample preparation-ashing, and the fastest also needs 1 hour.But this result of laboratory test being little to the directive significance of reality, loses this problem to stop cleaned coal, often relying on artificial knowhow to judge tailings ash content, judging whether to run coal.
Along with the development of automatic technology, people are making great efforts to propose a kind of new method always, with Instructing manufacture better.China has also made significant headway in flotation automatically control in recent years, and major part controls to be quantitative remedy-adding system is introduced floatation process to control automatically, but quantitative dosing controls to link together with floatation indicators.At present, the Duo Jia mechanism of the U.S. is carrying out carrying out the technology of image procossing and System Discrimination again to realize the on-line analysis of metal content in some ore pulp to after the shooting of ore pulp surface, Beijing Mine and Metallurgy General Inst is also carrying out the R&D work of similar techniques, because image technology needs the severe and system cost of iconic model, industrial production environment accurately higher, never industrially use on a large scale.Other department of China and unit also attempt image technology to introduce in the mensuration of flotation tailing ash content, have no up to now and successfully report for work.
Current Floatation Process Theory and production practices all show, to same ature of coal, and cleans ash
and clean coal yield
, tail coal ash content
with tail coal productive rate
there is extremely strong corresponding relation.Therefore can at the clean coal yield obtaining detected sample
with tail coal productive rate
after, try to achieve cleans ash by computing method
with tail coal ash content
.Namely the present invention inquires into according to such thinking, achieves gratifying effect.
Summary of the invention
Technical matters to be solved by this invention be to provide one simply, floating product ash content detection method fast and accurately.
The technical scheme solved the problems of the technologies described above is:
A kind of floating product ash content detection method, comprises the following steps:
(1) on floatation feed and flotation tailing pipeline, flowmeter and densitometer are installed, detect the pan feeding density of test product
, pan feeding flow
, mine tailing density
, mine tailing flow
;
(2) data that step (1) detects are brought into formula
with
calculate the clean coal yield of test product
with tail coal productive rate
;
(3) for same ature of coal, carry out in laboratory conditions carrying out cleans ash in the little flotation test of many groups or daily production
and clean coal yield
, tail coal ash content
with tail coal productive rate
statistics, the clean coal yield of this coal quality statistic value obtaining little flotation experimental results or count
system, statistics tail coal productive rate
system, and cleans ash
system, tail coal ash content
systemdata, according to these statistics values, draw the relation curve of the statistics floatation clean coal productive rate-ash content of this ature of coal and the relation curve of tail coal productive rate-ash content respectively;
(4) the statistics mine tailing productive rate-ash content relation curve of this ature of coal of drawing according to step (3) and clean coal yield-ash content relation curve, adopt data fitting method to obtain fitting function
with
, for same ature of coal, a1, b1, c1 and a2, b2, c2 are well-determined, after ature of coal changes, need to re-start step (3) and step (4) seeks approximate formula,
(5), step (2) is drawn
with
substitute into the formula in step (4) respectively, just can obtain cleans ash
with tail coal ash content
.
Above-mentioned floating product ash content detection method, on the pipeline that the densitometer of described floatation feed is arranged on floatation feed or on the branch pipe(tube) of supervisor, the densitometer of flotation tailing is arranged on the pipeline of flotation tailing, and bubble-free in pipeline, pipe flow speed is even.
Above-mentioned floating product ash content detection method, the flowmeter of described floatation feed is arranged on the pipeline of floatation feed, and flotation tailing flowmeter is arranged on the pipeline of flotation tailing, and pipeline is rising full packages, and pipe flow speed is even.
The invention has the beneficial effects as follows:
The invention provides a kind of simple, fast, flotation ash content detection method accurately, this flotation ash content detection method installs flowmeter and densitometer on floatation feed and flotation tailing pipeline, detect the pan feeding density of test product, pan feeding flow, mine tailing density, mine tailing flow, clean coal yield is calculated by these data, tail coal productive rate, and then draw the relation curve of the statistics floatation clean coal productive rate-ash content of this ature of coal and the relation curve of tail coal productive rate-ash content respectively in conjunction with the laboratory statistical data of this product, according to the clean coal yield of these curves and test product, tail coal calculation of yield goes out the cleans ash of test product, tail coal ash content.The present invention has simply, and fast, convenient and feature accurately, being brand-new a kind of detection method, is the innovation in flotation ash content detection method field, has very large value and significance, makes China in flotation ash content detection method field, walk prostatitis in the world.
Accompanying drawing explanation
Fig. 1 is the relation curve of the clean coal yield-cleans ash of the statistics of certain ature of coal;
Fig. 2 is the relation curve of the tail coal productive rate-tail coal ash content of the statistics of certain ature of coal.
Embodiment
Flotation tailing ash content detection method of the present invention needs use two kinds of instrument, and one is densitometer, and another kind is flowmeter.Densitometric kind is more, comprises radioactive source densitometer, and vibration densitometer and pressure reduction class densitometer, can choose according to actual conditions.Flowmeter can be selected and measure the widely used electromagnetic flowmeter of fluid.
The present invention adopts following steps:
(1) the Density Detection densitometer of floatation feed be arranged on floatation feed pipeline on or supervisor branch pipe(tube) on, the densitometer of flotation tailing is arranged on the pipeline of flotation tailing, needs to ensure bubble-free in pipeline, and pipe flow speed is even.
The flowmeter of floatation feed is arranged on the pipeline of floatation feed, and pipeline is required to be rising full packages, and pipe flow speed is even, and flotation tailing flowmeter is arranged on the pipeline of flotation tailing, also needs pipeline to be full packages and increase in pipeline.The operating specification of detailed installation operating instrument instrument.
(2) the pan feeding density that detects of floatation feed and flotation tailing densitometer and flowmeter
, pan feeding flow
, mine tailing density
with mine tailing flow
substitute into formula
with
calculate the clean coal yield of flotation
with tail coal productive rate
.
(3) for a certain ature of coal, clean coal yield
and cleans ash
, tail coal productive rate
with tail coal ash content
there is the feature of unique corresponding relation, carry out in laboratory conditions carrying out cleans ash in the little flotation test of many groups or daily production
and clean coal yield
, tail coal ash content
with tail coal productive rate
statistics, the clean coal yield of this coal quality statistic value obtaining little flotation experimental results or count
system, statistics tail coal productive rate
system, and cleans ash
system, tail coal ash content
systemdata, according to these statistics values, draw the relation curve of the statistics floatation clean coal productive rate-ash content of this ature of coal and the relation curve of tail coal productive rate-ash content respectively.
(4) the statistics mine tailing productive rate-ash content relation curve of this ature of coal of drawing according to step (3) and clean coal yield-ash content relation curve, adopt data fitting method can obtain the approximate formula of this curve
with
,for same ature of coal, a
1, b
1, c
1and a
2, b
2, c
2can determine, after ature of coal changes, need to re-start step (3) and step (4) seeks approximate formula.
(5) step (2) is drawn
with
substitute into the formula in step (4) respectively, just can obtain cleans ash
with tail coal ash content
.
Different ature of coal needs to seek new approximate formula, and other measuring methods are identical with computing method.
Claims (3)
1. a floating product ash content detection method, is characterized in that: comprise the following steps:
(1) on floatation feed and flotation tailing pipeline, flowmeter and densitometer are installed, detect the pan feeding density of test product
, pan feeding flow
, mine tailing density
, mine tailing flow
;
(2) data step (1) detected substitute into formula
with
calculate the clean coal yield of test product
with tail coal productive rate
;
In above-mentioned formula,
for clean coal yield,
for tail coal productive rate,
for pan feeding density,
for pan feeding flow,
for mine tailing density,
for mine tailing flow;
(3) for same ature of coal, carry out in laboratory conditions carrying out cleans ash in the little flotation test of many groups or daily production
and clean coal yield
, tail coal ash content
with tail coal productive rate
statistics, the clean coal yield of this coal quality statistic value obtaining little flotation experimental results or count
system, statistics tail coal productive rate
system, and cleans ash
system, tail coal ash content
systemdata, according to these statistics values, draw the relation curve of the statistics floatation clean coal productive rate-ash content of this ature of coal and the relation curve of tail coal productive rate-ash content respectively;
(4) the statistics tail coal productive rate-ash content relation curve of this ature of coal of drawing according to step (3) and clean coal yield-ash content relation curve, adopt data fitting method can obtain the approximate formula of this curve
with
for same ature of coal, a
1, b
1, c
1and a
2, b
2, c
2can determine, after ature of coal changes, need to re-start step (3) and step (4) seeks approximate formula;
In above-mentioned formula,
for cleans ash,
for tail coal ash content,
for clean coal yield,
for tail coal productive rate, a
1,b
1,c
1,a
2,b
2,c
2be respectively coefficient;
(5) step (2) is drawn
with
substitute into the formula in step (4) respectively, just can obtain cleans ash
with tail coal ash content
.
2. floating product ash content detection method according to claim 1, is characterized in that: the densitometer of described floatation feed is arranged on the pipeline of floatation feed, and the densitometer of flotation tailing is arranged on the pipeline of flotation tailing.
3. floating product ash content detection method according to claim 2, is characterized in that: the flowmeter of described floatation feed is arranged on the pipeline of floatation feed, and flotation tailing flowmeter is arranged on the pipeline of flotation tailing.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384026B (en) * | 2014-10-20 | 2016-08-17 | 山西大学 | A kind of for direct flotation potassium chloride and sodium chloride salt-mixture figure regulation and control method |
| CN105547917A (en) * | 2016-02-22 | 2016-05-04 | 天地（唐山）矿业科技有限公司 | Automatic detection method for coal product ash content |
| CN107377228B (en) * | 2017-08-02 | 2020-04-17 | 太原理工大学 | Method for testing bubble particle adhesion collision behavior in coal slime flotation |
| CN110893377A (en) * | 2019-12-30 | 2020-03-20 | 天津美腾科技有限公司 | Coarse slime sorting system and method |
| CN113310842A (en) * | 2021-05-27 | 2021-08-27 | 冀中能源股份有限公司 | Test method for obtaining coal powder floatability |
| CN116882849B (en) * | 2023-09-07 | 2023-12-19 | 天津美腾科技股份有限公司 | Method and device for measuring and calculating yield of clean coal |
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| JP2007046991A (en) * | 2005-08-09 | 2007-02-22 | Chugoku Electric Power Co Inc:The | Property evaluating method of fly ash, property evaluation device of fly ash, coal mixing ratio calculating method of coal, coal mixing ratio calculator of coal and coal mixing ratio calculating program of coal |
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| CN1214452A (en) * | 1997-10-15 | 1999-04-21 | 路迈西 | Determination of float-and-sink composition of coal based on its ash content |
| CN101382556A (en) * | 2008-09-28 | 2009-03-11 | 山西潞安矿业(集团)有限责任公司 | Soft measurement method for floating fine coal ash from slurry based on data drive |
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