CN106040421B - A kind of thermal coal method of quality control - Google Patents
A kind of thermal coal method of quality control Download PDFInfo
- Publication number
- CN106040421B CN106040421B CN201610569297.2A CN201610569297A CN106040421B CN 106040421 B CN106040421 B CN 106040421B CN 201610569297 A CN201610569297 A CN 201610569297A CN 106040421 B CN106040421 B CN 106040421B
- Authority
- CN
- China
- Prior art keywords
- coal
- raw coal
- calorific value
- raw
- sieve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
Landscapes
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of thermal coal method of quality control, first to raw coal 6mm deep screenings；The block raw coal of 200~13mm or 200~17mm is sorted using dense-medium shallow-tank；To the last raw coal separation of 13~6mm or 17~6mm；Enter bypass for being less than 6mm fine coal；For 1.5~0.25mm coarse slimes using sieve bend, high-frequency screen and coal slime centrifuge dehydration recycling；Fine coal slurry less than 0.25mm is concentrated through two sections, using sieve sedimentation-type centrifuge and plate and frame filter press combined recovery.Connect two mine power coal qualities to color using the method for the present invention to regulate and control, when raw coal calorific value is more than 3600kcal/kg, landing fine coal is returned into Recognition Applied in Coal Preparation System, rejects the expenses such as power consumption, artificial, one ton of fine coal profit is 30 yuan.When raw coal quality fluctuation is larger, the product quality which can produce meets user's requirement (calorific value 4400kcal/kg) always, and system suitability is stronger, and product quality is stablized preferable.
Description
Technical field
The present invention relates to a kind of raw coal quality control method more particularly to a kind of thermal coal method of quality control.
Background technology
Color connects two mines and is located at the Erdos mining areas Gao Touyao, and coal is based on non caking coal, a small amount of jet coal, belongs to low rotten
Degree, young bituminous coal.Since degree of coalification is low, porosity and large specific surface area, oxygen content of coal carbon ratio (O/C) greatly, hydrophilic polar
Functional group is more, causes raw coal moisture content higher.Since color connects the trial production of two mines, raw coal quality wide fluctuations, raw coal when good
Ash content 22.8%, total moisture 26.47%, calorific value 3910kcal/kg.Ash content 45.81%, total moisture when raw coal quality is bad
24.3%, calorific value 2760kcal/kg.
There are two features for hydrogenous coal tool：One：Viscosity is big, humidity is big, be easy to cause traditional sieve block, screening efficiency it is low
Under, cause to increase into water slime content；Two：Water imbibition is shown, moisture greatly improves after coal enters water, the big particulate of comparison surface area
Grade raw coal, coal enter the influence bigger of increased moisture after water than the ash content that is reduced after washing to calorific value, and part granularity is sent out
Heat negative growth.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of thermal coal method of quality control, realize
The raw coal of different quality is regulated and controled to obtain the product of stable quality.
The present invention is achieved by the following technical solutions, and the present invention includes the following steps：
(1) 6mm deep screenings first are carried out to raw coal；
(2) the block raw coal of 200~13mm or 200~17mm is sorted using dense-medium shallow-tank；
(3) to the last raw coal separation of 13~6mm or 17~6mm；
(4) enter bypass for being less than 6mm fine coal；
(5) for 1.5~0.25mm coarse slimes using sieve bend, high-frequency screen and coal slime centrifuge dehydration recycling；
(6) fine coal slurry less than 0.25mm is concentrated through two sections, using sieve sedimentation-type centrifuge and plate and frame filter press
Combined recovery.
The deep screening of the step (1) is：As raw coal calorific value ＜ 3400kcal/kg, make 6mm or more powder in raw coal
Coal, which enters, carries out washing in washing system, the specific gravity of separation for reducing lump coal Dense-medium system is 1.5g/cm3, smalls Dense-medium system
The specific gravity of separation is 1.4g/cm3, ensure that product calorific value of coal is stablized in 4400kcal/kg, by extra fine coal individually into storage
It deposits.
As raw coal calorific value ＜ 3400kcal/kg, raw coal scalping sieve screen size is adjusted to 13mm respectively, is relaxed
Sieve screen size is adjusted to 6mm, reduces the content of screenings, realize in raw coal 6mm or more fine coal enter in washing system into
Row washing.
The deep screening of the step (1) is：When raw coal calorific value is in 3400~3800kcal/kg, by lump coal separation
Proportion is transferred to 1.6g/cm3, the smalls specific gravity of separation is transferred to 1.5g/cm3So that product quality is stablized in 4400kcal/kg.
When raw coal calorific value is in 3400~3800kcal/kg, by 50% raw coal scalping sieve screen size by
13mm is adjusted to 25mm, and flip flop screen screen size is adjusted to 13mm by 6mm.
When raw coal calorific value is in 3400~3800kcal/kg, it is 13mm and tension and relaxation to keep raw coal scalping sieve sieve pore
It is that 6mm is constant to sieve screen size.
The deep screening of the step (1) is：As raw coal calorific value ＞ 3800kcal/kg, by lump coal separation than resetting
To 1.7g/cm3, the smalls specific gravity of separation is transferred to 1.6g/cm3So that product quality is stablized in 4400kcal/kg.
As raw coal calorific value ＞ 3800kcal/kg, raw coal scalping sieve sieve pore is adjusted to 25mm, tension and relaxation by 13mm
Sieve sieve pore is adjusted to 25mm by 13mm, while smalls is directly entered in product.
One of preferred embodiment as the present invention, in the step (1), deep screening obtains flip flop screen or auspicious relaxation difficult to understand using guest
Open sieve.
One of preferred embodiment as the present invention in the step (3), is divided using there is two product dense medium cyclones of pressure
Choosing.
Deep screening technology is applied in coal preparation technique, will be screened out the fine coal come and rationally mix and match, works as raw coal quality
When poor, the quantity of fine coal incorporation product is selected, extra fine coal is bypassed into storage, because fine coal has, ash content is big, moisture is big,
The physical characteristic of granularity≤6mm, so it is not easy spontaneous combustion convenient for storage；When raw coal quality is good, then fine coal is returned and mixes system
In, so that product quality is disclosure satisfy that user requires (calorific value 4400kcal/kg) and to keep stable always, and using fine coal as
Product realizes sale.
The present invention has the following advantages compared with prior art：Connect two mines to color using the method for the present invention to regulate and control, it is former
Coal quality is improved, and landing fine coal is returned to Recognition Applied in Coal Preparation System, rejects the expenses such as power consumption, artificial, and one ton of fine coal profit is 30 yuan.
It can be with one mixed coal product of production list；Can also yield products of quality (4800kcal/kg) and mixed coal product；Mixed coal can also be produced
With 6mm fine coal products；Filter-pressing coal slime.When raw coal quality fluctuation is larger, the product quality produced disclosure satisfy that user always
It is required that (calorific value 4400kcal/kg), system suitability is stronger, and product quality is stablized preferable.
Specific implementation mode
It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention
Implement, gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
The ore-dressing technique of the present embodiment is as follows：
It is 10.0Mt/a that the color of the present embodiment, which connects two mine Design for Coal Preparation Plant abilities, first to raw coal 6mm deep screenings；To 200
The block raw coal of~13mm or 200~17mm is sorted using dense-medium shallow-tank；Being used to the last raw coal of 13~6mm or 17~6mm has pressure
Two product dense medium cyclones are sorted；Enter bypass for being less than 6mm fine coal；Arc is used for 1.5~0.25mm coarse slimes
Shape sieve, high-frequency screen and coal slime centrifuge dehydration recycling；Fine coal slurry less than 0.25mm is concentrated through two sections, is settled using sieve
Formula centrifuge and plate and frame filter press combined recovery.
According to the difference of raw coal calorific value, the method for specific deep screening is as follows：
(1) as raw coal calorific value ＜ 3400kcal/kg, raw coal scalping sieve screen size is adjusted to respectively
13mm, flip flop screen screen size are adjusted to 6mm, reduce the content of screenings, and the above fine coal of raw coal 6mm is made to enter washing system as possible
Washing is carried out in system, increase block, end enter the amount of washing, and reduce coal amount, and the specific gravity of separation for secondly reducing lump coal Dense-medium system is transferred to
1.5g/cm3Left and right, the specific gravity of separation of smalls Dense-medium system are transferred to 1.4g/cm3Left and right ensures that product calorific value of coal is stablized
4400kcal/kg stores the extra independent warehouse entry of fine coal.
(2) when raw coal calorific value is in 3400~3800kcal/kg, 50% raw coal scalping sieve screen size is replaced
25mm is adjusted to by 13mm, flip flop screen screen size is adjusted to 13mm by 6mm；Or it keeps raw coal scalping to sieve sieve pore and is
13mm, flip flop screen screen size are that 6mm is constant；Lump coal separation proportion is transferred to 1.6g/cm3, the smalls specific gravity of separation is transferred to 1.5g/
cm3So that product quality is stablized in 4400kcal/kg.
(3) as raw coal calorific value ＞ 3800kcal/kg, fine coal is calculated according to mine raw coal quality and returns storehouse amount, it will be former
Coal scalping sieve sieve pore is adjusted to 25mm by 13mm, and flip flop screen sieve pore is adjusted to 25mm, 2 flip flop screens of simultaneous selection by 13mm
Its sieve plate is removed, smalls is directly entered in product, and lump coal separation proportion is transferred to 1.7g/cm3, the smalls specific gravity of separation is transferred to
1.6g/cm3So that product quality is stablized in the case of 4400kcal/kg, keeps product yield 92% or more.
The deep screening of the present embodiment has used two systems, and a set of is 3 Tai Bin get flip flop screens, and a set of is that 3 Tai Aorui relax
Sieve is opened, by after production statistics indicate that screening efficiency is 80~90%, it is ensured that most of granularity 6mm fine coal below can be directly
It carries out in product.
Reference examples：
The present embodiment is selected connects two mines in same field with "nine squares" with color, and connection electric energy exploitation in Inner Mongol north similar in Coal Characteristics has
Limit company height head kiln coal mine example as a contrast.
The ore-dressing technique of high head kiln coal mine is as follows：
High head kiln mine Design for Coal Preparation Plant ability is 8.0Mt/a, and technological process is that 150~13mm grades of lump coal use dense-medium shallow-tank
Discharge refuse；13~0mm grades of smalls bypasses；3~0.1mm grades of coarse slimes are recycled using sieve bend and coal slime centrifuge；0.1~0mm grades
Fine coal slurry is recycled using plate and frame filter press.
Compare the ore-dressing technique of the present invention and the ore-dressing technique and product of product and reference examples：
One, process ration：
It is 6mm that Se Lianerkuang coal preparation plants, which use raw coal deep screening, screening lower limit,；Washing system has smalls system；Coal slime
Water treatment technology is perfect.Gao Touyao mines coal preparation plant only has lump coal system, slime water treatment simple for process.
Two, product compares：
Color connects two mineral products structures：It can be with one mixed coal product of production list；It can also yield products of quality (4800kcal/kg)
With mixed coal product；Mixed coal and 6mm fine coal products can also be produced；Filter-pressing coal slime.
High head kiln coal mine product structure：For single mixed coal product；It is arranged outside filter-pressing coal slime.
As shown in table 1, known to the quality for comparing two coal mine products：Se Lianerkuang coal preparation plants use banana screen+flip flop screen
Sieving technology is combined, 6mm deep screenings are increased, screening efficiency increases, and reduces 6mm grades below and enters water, therefore coal slime is produced
Rate is low；Coarse grain slime recovery technique in increasing simultaneously, improves product yield.Gao Tou kilns coal preparation plant only has raw coal once to sieve point
Grade, screening effect is poor, and the coarse grain slime recovery technique without in.
Se Lianerkuang coal preparation plants increase smalls washing process compared with Gao Touyao mines coal preparation plant, increase raw coal and enter the amount of washing, though
Right number of devices increases, and power consumption is slightly higher, but the grey amplitude of product drop increases, and product calorific value is higher.Since sulphur content is concentrated mainly on
In spoil, the increase of smalls washing system also increases spoil discharge capacity, and product sulphur content is relatively low.Therefore, it is to cause high head kiln mine
Coal preparation plant's product calorific value is relatively low, the higher reason of sulphur content.
High head kiln coal mine uses one section of concentration coal slurry water processing, compared with color connects two mines, three sections of concentrations, only passes through
Increase dosage to control washing wastewater, considerably increases the cost of medicine consumption.
1 two Raw Coals of table and product quality contrast table
Three, economic efficiency contrast：
Color connects two mines：Coal preparation plant's ton raw coal processing charges are 5.66 yuan；Product calorific value 4400kcal/kg；Yield 78%；Production
65 yuan/ton of product price (coal price source Erdos in March, 2016 coal market price including tax).
High head kiln coal mine：Coal preparation plant's ton raw coal processing charges are 6.30 yuan；Product calorific value 3950kcal/kg；Yield 85%；
45 yuan/ton of product price (coal price source Erdos in March, 2016 coal market price including tax).
13.09 yuan of benefit being created Se Lianerkuang coal preparation plants one ton of raw coal more selected than high head kiln Coalmine Coal Preparation Plant more.According to
Whole year, selected 8,000,000 tons of raw coal calculated, and color connects two mines and increases economic benefit about 104,720,000 more than high head kiln coal mine
Member.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (3)
1. a kind of thermal coal method of quality control, which is characterized in that include the following steps：
(1) 6mm deep screenings first are carried out to raw coal；
(2) the block raw coal of 200~13mm is sorted using dense-medium shallow-tank, to the last raw coal separation of 13~6mm；
Alternatively, the block raw coal to 200~17mm is sorted using dense-medium shallow-tank, to the last raw coal separation of 17~6mm；
(3) enter bypass for being less than 6mm fine coal；
(4) for 1.5~0.25mm coarse slimes using sieve bend, high-frequency screen and coal slime centrifuge dehydration recycling；
(5) fine coal slurry less than 0.25mm is concentrated through two sections, is combined using sieve sedimentation-type centrifuge and plate and frame filter press
Recycling；
The deep screening of the step (1) is：As raw coal calorific value ＜ 3400kcal/kg, make in raw coal 6mm or more fine coal into
Enter and carry out washing in washing system, the specific gravity of separation for reducing lump coal Dense-medium system is 1.5g/cm3, the sorting of smalls Dense-medium system
Proportion is 1.4g/cm3, ensure that product calorific value of coal is stablized in 4400kcal/kg, the extra independent warehouse entry of fine coal stored；When
When raw coal calorific value ＜ 3400kcal/kg, raw coal scalping sieve screen size is adjusted to 13mm, flip flop screen sieve pore ruler respectively
It is very little to be adjusted to 6mm, reduce the content of screenings, realizes in raw coal that 6mm or more fine coal enters and carry out washing in washing system；
When raw coal calorific value is in 3400~3800kcal/kg, lump coal separation proportion is transferred to 1.6g/cm3, the smalls specific gravity of separation
It is transferred to 1.5g/cm3So that product quality is stablized in 4400kcal/kg；
When raw coal calorific value is in 3400~3800kcal/kg, 50% raw coal scalping is sieved into screen size by 13mm tune
Whole to arrive 25mm, flip flop screen screen size is adjusted to 13mm by 6mm；
Alternatively, when raw coal calorific value is in 3400~3800kcal/kg, it is 13mm and tension and relaxation to keep raw coal scalping sieve sieve pore
It is that 6mm is constant to sieve screen size；
As raw coal calorific value ＞ 3800kcal/kg, lump coal separation proportion is transferred to 1.7g/cm3, the smalls specific gravity of separation is transferred to
1.6g/cm3So that product quality is stablized in 4400kcal/kg；It is as raw coal calorific value ＞ 3800kcal/kg, raw coal is primary
Classifying screen sieve pore is adjusted to 25mm by 13mm, and flip flop screen sieve pore is adjusted to 25mm by 13mm, while smalls is directly entered in product.
2. a kind of thermal coal method of quality control according to claim 1, which is characterized in that in the step (1), depth
Screening obtains flip flop screen or auspicious flip flop screen difficult to understand using guest.
3. a kind of thermal coal method of quality control according to claim 1, which is characterized in that in the step (2), use
There are two product dense medium cyclones of pressure to be sorted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610569297.2A CN106040421B (en) | 2016-07-18 | 2016-07-18 | A kind of thermal coal method of quality control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610569297.2A CN106040421B (en) | 2016-07-18 | 2016-07-18 | A kind of thermal coal method of quality control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106040421A CN106040421A (en) | 2016-10-26 |
| CN106040421B true CN106040421B (en) | 2018-08-31 |
Family
ID=57187930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610569297.2A Active CN106040421B (en) | 2016-07-18 | 2016-07-18 | A kind of thermal coal method of quality control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106040421B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109746114B (en) * | 2019-01-31 | 2021-03-23 | 中国矿业大学 | Separation process of refractory power coal |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6666335B1 (en) * | 1999-10-29 | 2003-12-23 | C.A.S.T. Minerals, Inc. | Multi-mineral/ash benefication process and apparatus |
| CN101716552B (en) * | 2009-12-28 | 2012-05-23 | 河南理工大学 | Raw coal washing process capable of realizing non-polar ash conditioning |
| CN102179291A (en) * | 2010-12-31 | 2011-09-14 | 中国神华能源股份有限公司 | Steam coal preparation technique with low coal slime yield |
| CN105327770A (en) * | 2015-11-23 | 2016-02-17 | 淮南矿业(集团)有限责任公司 | Coal dressing treatment method |
-
2016
- 2016-07-18 CN CN201610569297.2A patent/CN106040421B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106040421A (en) | 2016-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106076606B (en) | A kind of beneficiation method of magnetic-red Complex iron ore | |
| CN105107616B (en) | A kind of method for effectively improving low-grade vanadium titano-magnetite beneficiating efficiency | |
| CN104174482B (en) | A kind of lean hematite ore-dressing technique | |
| CN105080702B (en) | A kind of efficient coal-series pyrite dry method process of enriching and system | |
| CN102430481B (en) | Sorting process for high-ash and difficult-separation coal slime | |
| CN103736584B (en) | A kind of beneficiation method of high-grade copper-nickel sulphide ore | |
| CN204448258U (en) | A kind of ore-dressing plant for super low-grade vanadium titano-magnetite | |
| CN106733107B (en) | Low-grade iron ore beneficiation method | |
| CN102319619B (en) | Graded washing process for raw coal | |
| CN105772212B (en) | A kind of moderate cohesive coal produces extraordinary white cement coal method | |
| CN102489391B (en) | High-sulfur power raw coal sorting process | |
| CN205797474U (en) | A kind of high ash coarse slime degree of depth fall ash system | |
| CN104056714B (en) | A kind of difficulty selects the ore-dressing technique of micro-size fraction iron copper mine | |
| CN112844763A (en) | Ore X-ray preselection-crushing system and process thereof | |
| CN101869877A (en) | Coal gangue sorting process | |
| CN112756103B (en) | Method for processing fine sand by mixing iron tailings and crusher-made sand | |
| CN110523524A (en) | A kind of full grade of anthracite is selected to simplify sorting process | |
| CN106040421B (en) | A kind of thermal coal method of quality control | |
| CN108855579B (en) | Coal dressing method by using aqueous medium cyclone | |
| CN107020200A (en) | Floatation clean coal mixing with technique in wholegrain level cleaned coal | |
| CN111375482B (en) | Method for grading and sorting silico-calcic phosphate ore | |
| CN101486014A (en) | Helical flow trough coal separation device by gravity separation and gravity separation method for clean coal using helical flow trough | |
| CN205599512U (en) | Graphite screening machine | |
| CN108759313A (en) | A kind of brown coal drying-dry separation collaboration optimization method for upgrading and technique | |
| CN106311461A (en) | Mine tailing re-cleaning processing technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201105 Address after: 232000 Longyan Village neighborhood committee, Dongshan street, tianjia'an District, Huainan City, Anhui Province Patentee after: XINGKE MEASURING TECHNOLOGY SERVICE CO., LTD. OF HUAINAN MINING Group Address before: 232001 Anhui province tianjia'an District mountain in Huainan City Patentee before: HUAINAN MINING INDUSTRY (Group) Co.,Ltd. |