CN108588409A - A kind of floating tail-coal base metallurgical briquetting binder and preparation method thereof - Google Patents
A kind of floating tail-coal base metallurgical briquetting binder and preparation method thereof Download PDFInfo
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- CN108588409A CN108588409A CN201810016817.6A CN201810016817A CN108588409A CN 108588409 A CN108588409 A CN 108588409A CN 201810016817 A CN201810016817 A CN 201810016817A CN 108588409 A CN108588409 A CN 108588409A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
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Abstract
A kind of floating tail-coal base metallurgical briquetting binder and preparation method thereof, belongs to technical field of mineral processing, raw material components are by weight percentage：Purifying and flotation tail coal 85~90%, hydroxypropyl starch ether 5~8%, sodium lignin sulfonate 2~3%, sodium carbonate 3~5%, the granularity of each component≤0.045mm；Preparation method is：(1) add water that an ore pulp is made floating tail-coal, purified through cyclone fraction grade, obtain purifying and flotation tail coal ore pulp；(2) it adds water and secondary ore pulp is made, hydroxypropyl starch ether, sodium lignin sulfonate and sodium carbonate is added, binder slurry is made in stirring；(3) activation is ground after drying.Binder prepared by the present invention can effectively reduce the amount of allocating of binder in metallurgical briquetting, and the shatter strength of green pellet, compression strength of green pel let, burst temperature, preheated ball and the pelletizing crushing strength that obtain are significantly improved；Reduce pollution of the floating tail-coal to environment simultaneously.
Description
Technical field
The invention belongs to technical field of mineral processing, and in particular to a kind of floating tail-coal base metallurgical briquetting binder and its system
Preparation Method.
Background technology
China's coking coal demand is huge, but the coking coal of the high ash of shortage of resources and part, high-sulfur can only make as thermal coal
With causing a large amount of wastes of scarce resource；The flotation method maximally efficient as separation of fine particle coal, is widely used in coking coal
Slime separation.Such as：The colleges and universities such as Institutes Of Technology Of Taiyuan, China Mining University are with regard to coal slime flotation application related invention patent, such as
" a kind of floatation process of high grey difficult-to-float coal " (CN201410607611.2), " a kind of coal slime floating process "
(CN201010125831.3) and " the floatation process method of high ash content fine coal slurry " (CN201310034282.2) etc.；These
Method can efficiently solve the difficult point in coking coal coal slime flotation, improve burnt coal yield, be conducive to protect rare coke
Coal resource；But it will produce a large amount of solid waste in floatation process --- floating tail-coal, in existing production technology level
Under, content accounts for 40% or so of selected coal slime, and directly burning can cause environment largely to pollute.In addition, containing in floating tail-coal
There is a large amount of coal measures intergrowth mineral object, and there is certain economic benefit, with the development of science and technology, the profit of coal measures intergrowth mineral object
With imperative.
According to the difference of the minerogentic conditions such as geological structure, degree of metamorphism and coal quality type, coal measures intergrowth mineral object also phase not to the utmost
Together.Most commonly seen is high silicon associated mineral, such as：Bentonite, kaolin, diatomite etc..For coal measures intergrowth mineral object recycling
Utilizing question, the country have carried out numerous studies, and have applied for a large amount of related patents.Cheng Hongfei etc. is prepared using Coaseries kaolin
Sodalite, such as " a kind of method that Coaseries kaolin intercalated compound prepares sodalite " (CN201510795951.7)；Lv Yan is adopted
Zeolite molecular sieve is prepared with Coaseries kaolin, such as " the LSX type zeolite molecular sieves synthesis technology based on Coaseries kaolin synthesis "
(CN201410636352.6) and " synthesis technology of Coaseries kaolin X-type zeolite molecular sieve "
(CN201410636436.X)；Liu Qin Pu etc. prepares aluminium oxide or white carbon using Coaseries kaolin, such as " utilizes Coaseries kaolin
The method for preparing ultra-fine alumina co-producing white carbon black " (CN201110369401.0).These researchs are both in flotation tailing
Coal measures be total to the kaolinic application of association.And it is total to the bentonitic Utilizing question of association for coal measures in floating tail-coal, it is domestic rare
Research.Coal measures in floating tail-coal is total to association bentonite resource Utilizing question and is not solved effectively for a long time.
With the increasingly reduction of high grade iron ore, enriched ore is widely used in steel production.Pellet is as reason
The enriched ore thought, can not only imurity-removal, improve full Iron grade, and iron-smelting raw material source can be expanded, make large-scale application
Poor iron ore is possibly realized.It is the huge technological challenge that China's pellet development at this stage is faced to improve pellet quality, and
Pellet binder is the core of key technology, while being also to cause China's pellet quality there are the masters of larger gap compared to external
Want reason.Bentonite has the characteristics that thermal stability is good, viscosity is high, cheap and easy to get as most common pellet binder, wide
It is general to be used in pelletizing production.Currently, most of domestic pelletizing plant all uses natural montmorillonite as pellet binder, amount of allocating
Change with raw ore and magnetic iron powder property, but is all generally higher than 2%.The characteristics of for natural montmorillonite, domestic scholars are carried out
Natural montmorillonite prepares the correlative study of pellet binder, has such as applied for " a kind of pelletizing high efficiency composition bentonite "
(CN201510034248.4), the patents such as " a kind of pelletizing bentonite and preparation method thereof " (CN201110149924.4).So
And the above method is only limitted to natural montmorillonite, not yet finds that coal measures is total to association bentonite and prepares metallurgical briquetting binder so far
Correlation report.
It is montmorillonite that coal measures, which is total to the bentonitic main component of association, is different from common natural montmorillonite, the inside is often containing big
The coal of amount, and to be total to the embedding cloth of association bentonite thinner for coal and coal measures, it is difficult to detach, but just because of containing a large amount of coal, coal measures is total
Association bentonite surface active groups increase, and be total to association bentonite conducive to coal measures adsorbs with magnetic iron powder, reduce magnetic iron powder table
Face current potential, to reduce the amount of allocating of binder in metallurgical briquetting.
Invention content
The object of the present invention is to provide a kind of floating tail-coal base metallurgical briquetting binders and preparation method thereof, and it is total to expand coal measures
The utilization of associated mineral is prepared cheap, the few metallurgical briquetting prepared as primary raw material using floating tail-coal of additive amount and bonded
Agent；It is another object of the present invention to provide the preparation methods of the binder.
The raw material components of floating tail-coal base metallurgical briquetting binder of the present invention are by weight percentage：Purifying and flotation tail coal
85~90%, hydroxypropyl starch ether 5~8%, sodium lignin sulfonate 2~3%, sodium carbonate 3~5%, the granularity of each component≤
0.045mm；The wherein montmorillonite weight percent 70~75% of purifying and flotation tail coal.
Above-mentioned purifying and flotation tail coal is that floating tail-coal is made through the purification of cyclone fraction grade.
The dalton of the average molecular weight of above-mentioned hydroxypropyl starch ether >=10000, the pH value of 2% aqueous solution of weight concentration
It is 8~10, viscosity >=5000mPas of 5% aqueous solution of weight concentration.
The dalton of the average molecular weight of above-mentioned sodium lignin sulfonate >=10000, the pH value of 2% aqueous solution of weight concentration
It is 7~9, viscosity >=5000mPas of 5% aqueous solution of weight concentration.
The preparation method of the floating tail-coal base metallurgical briquetting binder of the present invention includes the following steps：
1, by granularity≤0.074mm, the floating tail-coal of 50% or more montmorillonite weight percent adds water that weight concentration is made
15~20% ore pulp, then processing is carried out through cyclone group, purify to montmorillonite weight percent in floating tail-coal
70~75%, obtain the purifying and flotation tail coal ore pulp of weight concentration 30~40%；
2, purifying and flotation tail coal ore pulp is added into the secondary ore pulp that weight concentration 20~25% is made in water, then presses above-mentioned ratio
Example be added granularity≤hydroxypropyl starch ether, sodium lignin sulfonate and the sodium carbonate of 0.074mm, 20~30min of stirring is made viscous
Tie agent slurry；
3, moisture removal is removed into the drying of binder slurry, is then made floating to granularity≤0.045mm with Ball-stirring mill grinding activation
Select tail coal base metallurgical briquetting binder.
In the above method, the cyclone in the cyclone group that when processing uses is small-angle cyclone.
In the above method, 600~800r/min of rotating speed of Ball-stirring mill, material ball ratio 60~80% when grinding activates.
In the above method, drying is to carry out expansion drying using Rotatingandflashstreamingdrier.
Binder prepared by the present invention can effectively reduce the amount of allocating of binder in metallurgical briquetting, and amount of allocating is iron ore concentrate
The 1.0~1.5% of weight, compared with the calcium-base bentonite (smectite content >=70%) of identical amount of allocating, shatter strength of green pellet,
Compression strength of green pel let, burst temperature, preheated ball and pelletizing crushing strength are significantly improved；Meanwhile side of the invention
Method adaptability is stronger, can have different degrees of raising for the iron ore concentrate of different sources, different grain size, different minerogentic conditions,
Meet production requirement；The cyclone group formed using small-angle cyclone, processing diameter are had and are divided in 15 microns of particles below
Feature long from the time, classification efficiency is high, small-angle cyclone are usually used in low-density and fine detached job.
Floating tail-coal used in the present invention belongs to typical secondary resource, and metallurgical briquetting binder had been made both using floating tail-coal
The utilization rate that coal measures intergrowth mineral object can be improved increases the economic benefit of coal enterprise, while can effectively reduce flotation tail
Pollution of the coal to environment reduces floating tail-coal bulk deposition to appropriation of land, and social benefit is equally huge.
Description of the drawings
Fig. 1 is a kind of preparation method process flow chart of floating tail-coal base metallurgical briquetting binder of the present invention.
Specific implementation mode
Illustrated in greater detail is carried out to the present invention below, but the invention is not limited in following implementation；It is any to be based on
Principle of the invention improvements introduced and modification should all be protected by the claims in the present invention.
The equipment used is mixed as reaction kettle in material in the embodiment of the present invention.
The dry equipment used is Rotatingandflashstreamingdrier in the embodiment of the present invention, 200 DEG C of drying temperature, time 10s.
The floating tail-coal used in the embodiment of the present invention is the floating tail-coal formed in coking coal coal slime flotation production process,
Main component is that coal measures is total to association bentonite, montmorillonite weight percent 50~55%.
Hydroxypropyl starch ether, sodium lignin sulfonate and the sodium carbonate used in the embodiment of the present invention produces for technical grade purchased in market
Product.
The dalton of the average molecular weight of the hydroxypropyl starch ether used in the embodiment of the present invention >=10000, weight concentration
The pH value of 2% aqueous solution is 8~10, viscosity >=5000mPas of 5% aqueous solution of weight concentration.
The dalton of the average molecular weight of the sodium lignin sulfonate used in the embodiment of the present invention >=10000, weight concentration
The pH value of 2% aqueous solution is 7~9, viscosity >=5000mPas of 5% aqueous solution of weight concentration.
Cyclone in the embodiment of the present invention in cyclone group is small-angle cyclone.
The application method and principle of floating tail-coal base metallurgical briquetting binder prepared by the present invention be：By floating tail-coal base smelting
Golden pellet binder is uniform in stirrer for mixing with iron ore concentrate, then enters through belt conveyor and life is made in disc balling machine
Ball, floating tail-coal base metallurgical briquetting binder amount of allocating are the 0.5~1% of iron ore concentrate weight；Due to floating tail-coal base metallurgy ball
Contain large amount of organic in group's binder, improve the hydrophilicity on pelletizing surface, greenball properties greatly improve；Simultaneously in high temperature item
Under part, organic matter is all or overwhelming majority burning is volatilized, thus is influenced on ripe ball grade smaller；Association to be total to using coal measures swollen simultaneously
The stability and caking property of profit soil at high temperature, contribute to the raising of finished ball performance；When floating tail-coal base metallurgical briquetting bonds
When agent amount of allocating is 1%, the indices of green-ball and finished ball are above the calcium-base bentonite of identical amount of allocating；Wherein, raw
Ball drop strength improves 1.0 time/balls, and compression strength of green pel let improves 4.57 N/balls, and burst temperature improves 55 DEG C, pre- hot-bulb
Intensity improves 250 N/balls, and pelletizing crushing strength improves 276 N/balls.
Embodiment 1
The component of floating tail-coal base metallurgical briquetting binder is by weight percentage：Purifying and flotation tail coal 85%, hydroxypropyl
Starch ether 8%, sodium lignin sulfonate 2%, sodium carbonate 5%；Granularity≤0.045mm；
Preparation method is：
Add water that weight concentration is made the floating tail-coal of granularity≤0.074mm, 50% or more montmorillonite weight percent
15% ore pulp, then processing is carried out through cyclone group, montmorillonite weight percent 70% in floating tail-coal is purified to,
Obtain the purifying and flotation tail coal ore pulp of weight concentration 30%；
Purifying and flotation tail coal ore pulp is added into the secondary ore pulp that weight concentration 20% is made in water, is then added according to the above ratio
Granularity≤hydroxypropyl starch ether, sodium lignin sulfonate and the sodium carbonate of 0.074mm, binder slurry is made in stirring 30min；
Moisture removal is removed into the drying of binder slurry, is then activated to granularity≤0.045mm with Ball-stirring mill grinding, Ball-stirring mill
Floating tail-coal base metallurgical briquetting binder is made in rotating speed 800r/min, material ball ratio 80%.
Embodiment 2
The component of floating tail-coal base metallurgical briquetting binder is by weight percentage：Purifying and flotation tail coal 90%, hydroxypropyl
Starch ether 5%, sodium lignin sulfonate 2%, sodium carbonate 3%；Granularity≤0.045mm；
Preparation method is：
Add water that weight concentration is made the floating tail-coal of granularity≤0.074mm, 51% or more montmorillonite weight percent
16% ore pulp, then processing is carried out through cyclone group, montmorillonite weight percent 71% in floating tail-coal is purified to,
Obtain the purifying and flotation tail coal ore pulp of weight concentration 31%；
Purifying and flotation tail coal ore pulp is added into the secondary ore pulp that weight concentration 21% is made in water, is then added according to the above ratio
Granularity≤hydroxypropyl starch ether, sodium lignin sulfonate and the sodium carbonate of 0.074mm, binder slurry is made in stirring 25min；
Moisture removal is removed into the drying of binder slurry, is then activated to granularity≤0.045mm with Ball-stirring mill grinding, Ball-stirring mill
Floating tail-coal base metallurgical briquetting binder is made in rotating speed 700r/min, material ball ratio 70%.
Embodiment 3
The component of floating tail-coal base metallurgical briquetting binder is by weight percentage：Purifying and flotation tail coal 87%, hydroxypropyl
Starch ether 6%, sodium lignin sulfonate 3%, sodium carbonate 4%；Granularity≤0.045mm；
Preparation method is：
Add water that weight concentration is made the floating tail-coal of granularity≤0.074mm, 53% or more montmorillonite weight percent
17% ore pulp, then processing is carried out through cyclone group, montmorillonite weight percent 73% in floating tail-coal is purified to,
Obtain the purifying and flotation tail coal ore pulp of weight concentration 32%；
Purifying and flotation tail coal ore pulp is added into the secondary ore pulp that weight concentration 22% is made in water, is then added according to the above ratio
Granularity≤hydroxypropyl starch ether, sodium lignin sulfonate and the sodium carbonate of 0.074mm, binder slurry is made in stirring 25min；
Moisture removal is removed into the drying of binder slurry, is then activated to granularity≤0.045mm with Ball-stirring mill grinding, Ball-stirring mill
Floating tail-coal base metallurgical briquetting binder is made in rotating speed 600r/min, material ball ratio 60%.
Embodiment 4
The component of floating tail-coal base metallurgical briquetting binder is by weight percentage：Purifying and flotation tail coal 86%, hydroxypropyl
Starch ether 7%, sodium lignin sulfonate 3%, sodium carbonate 4%；Granularity≤0.045mm；
Preparation method is：
Add water that weight concentration is made the floating tail-coal of granularity≤0.074mm, 50% or more montmorillonite weight percent
18% ore pulp, then processing is carried out through cyclone group, montmorillonite weight percent 75% in floating tail-coal is purified to,
Obtain the purifying and flotation tail coal ore pulp of weight concentration 40%；
Purifying and flotation tail coal ore pulp is added into the secondary ore pulp that weight concentration 25% is made in water, is then added according to the above ratio
Granularity≤hydroxypropyl starch ether, sodium lignin sulfonate and the sodium carbonate of 0.074mm, binder slurry is made in stirring 20min；
Moisture removal is removed into the drying of binder slurry, is then activated to granularity≤0.045mm with Ball-stirring mill grinding, Ball-stirring mill
Floating tail-coal base metallurgical briquetting binder is made in rotating speed 750r/min, material ball ratio 75%.
Claims (7)
1. a kind of floating tail-coal base metallurgical briquetting binder, it is characterised in that raw material components are by weight percentage：Purifying and flotation
Tail coal 85~90%, hydroxypropyl starch ether 5~8%, sodium lignin sulfonate 2~3%, sodium carbonate 3~5%, the granularity of each component
≤ 0.045mm；The wherein montmorillonite weight percent 70~75% of purifying and flotation tail coal.
2. a kind of floating tail-coal base metallurgical briquetting binder according to claim 1, it is characterised in that the hydroxypropyl
The pH value of the dalton of the average molecular weight of starch ether >=10000,2% aqueous solution of weight concentration is 8~10, weight concentration 5%
Viscosity >=5000mPas of aqueous solution.
3. a kind of floating tail-coal base metallurgical briquetting binder according to claim 1, it is characterised in that the lignin
The pH value of the dalton of the average molecular weight of sodium sulfonate >=10000,2% aqueous solution of weight concentration is 7~9,5% water of weight concentration
Viscosity >=5000mPas of solution.
4. a kind of preparation method of floating tail-coal base metallurgical briquetting binder described in claim 1, it is characterised in that by following
Step carries out：
(1) by granularity≤0.074mm, the floating tail-coal of 50% or more montmorillonite weight percent add water be made weight concentration 15~
20% ore pulp, then through cyclone group carry out processing, purify to montmorillonite weight percent 70 in floating tail-coal~
75%, obtain the purifying and flotation tail coal ore pulp of weight concentration 30~40%；
(2) purifying and flotation tail coal ore pulp is added into the secondary ore pulp that weight concentration 20~25% is made in water, then according to the above ratio
Be added granularity≤hydroxypropyl starch ether, sodium lignin sulfonate and the sodium carbonate of 0.074mm, bonding is made in 20~30min of stirring
Agent slurry；
(3) moisture removal is removed into the drying of binder slurry, flotation then is made to granularity≤0.045mm with Ball-stirring mill grinding activation
Tail coal base metallurgical briquetting binder.
5. the preparation method of floating tail-coal base metallurgical briquetting binder according to claim 4, it is characterised in that described
600~800r/min of rotating speed of Ball-stirring mill, material ball ratio 60~80% when grinding activation.
6. the preparation method of floating tail-coal base metallurgical briquetting binder according to claim 4, it is characterised in that described
Dry is to carry out expansion drying using Rotatingandflashstreamingdrier.
7. the preparation method of floating tail-coal base metallurgical briquetting binder according to claim 4, it is characterised in that described
Cyclone in the cyclone group used when processing is small-angle cyclone.
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| CN201810016817.6A CN108588409B (en) | 2018-01-09 | 2018-01-09 | A kind of floating tail-coal base metallurgical briquetting binder and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702873A (en) * | 2019-09-23 | 2020-01-17 | 青岛特殊钢铁有限公司 | Method for judging powder yield of injected granulated coal in mill |
| CN113960244A (en) * | 2021-10-09 | 2022-01-21 | 武汉科技大学 | Method for measuring content of montmorillonite in metallurgical pellets |
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| CN102021323A (en) * | 2009-09-18 | 2011-04-20 | 鞍钢集团矿业公司 | Novel binder for metallurgical pellets |
| CN102816926A (en) * | 2011-06-07 | 2012-12-12 | 绵阳堃山矿业有限公司 | Bentonite used for pellets, and preparation method thereof |
| CN104099468A (en) * | 2014-07-01 | 2014-10-15 | 郑州大学 | Bauxite tailings-based iron ore pellet binder and preparation method thereof |
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2018
- 2018-01-09 CN CN201810016817.6A patent/CN108588409B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021323A (en) * | 2009-09-18 | 2011-04-20 | 鞍钢集团矿业公司 | Novel binder for metallurgical pellets |
| CN102816926A (en) * | 2011-06-07 | 2012-12-12 | 绵阳堃山矿业有限公司 | Bentonite used for pellets, and preparation method thereof |
| CN104099468A (en) * | 2014-07-01 | 2014-10-15 | 郑州大学 | Bauxite tailings-based iron ore pellet binder and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702873A (en) * | 2019-09-23 | 2020-01-17 | 青岛特殊钢铁有限公司 | Method for judging powder yield of injected granulated coal in mill |
| CN113960244A (en) * | 2021-10-09 | 2022-01-21 | 武汉科技大学 | Method for measuring content of montmorillonite in metallurgical pellets |
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| CN108588409B (en) | 2019-07-09 |
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