CN109136546A - A kind of bentonitic processing method of pellet binder - Google Patents
A kind of bentonitic processing method of pellet binder Download PDFInfo
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- CN109136546A CN109136546A CN201811121565.XA CN201811121565A CN109136546A CN 109136546 A CN109136546 A CN 109136546A CN 201811121565 A CN201811121565 A CN 201811121565A CN 109136546 A CN109136546 A CN 109136546A
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- bentonite
- pellet binder
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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
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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- Environmental & Geological Engineering (AREA)
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- Inorganic Chemistry (AREA)
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a kind of bentonitic processing methods of pellet binder, to improve the problem of bentonite pellet binder is to reducing compression strength of green pel let and reducing drop strength, bentonite raw ore is passed through into purification by mineral using hydrocyclone, improve the content of montmorillonite in raw ore, utilize sodium pyrophosphate, sodium carbonate and light calcined magnesia stir sodium to bentonite as modifying agent, obtain ultra-fine sodium-ionized bentonite, add glucose solution and carboxymethyl cellulose again simultaneously, improve the adhesive property of pellet binder, and do not influence greenball properties, bentonitic additive amount can also be reduced, reduce production cost, pellet binder provided by the invention pelletizing effect in pelletizing is good, green ball strength is high, and the light calcined magnesia added when bentonite modified improves the burst temperature of pelletizing in green-ball high-temperature roasting, improve the smelting of pellet Golden performance, pellet binder application method provided by the invention is simple, and effect is good, is free of any harmful element, is worthy to be popularized.
Description
Technical field
The present invention relates to bentonite processing technique field more particularly to a kind of bentonitic processing sides of pellet binder
Method.
Background technique
China's iron ore reserves are extremely abundant, and proven reserve is up to 60,800,000,000 t, but the overwhelming majority is disseminated grain size
Carefully, the raw poor iron ore of multicomponent total (companion).With the increasingly reduction of high grade iron ore, enriched ore is widely used in steel
Production.Pellet is not only stripped of impurity, full Iron grade is higher, Er Qieneng as ideal enriched ore in ore dressing process
Expand iron-smelting raw material source, makes it possible large-scale application poor iron ore.The improvement of pellet quality is China's ball at this stage
Nodulizing develops the huge technological challenge faced, and pelletizing binder is the key that the technology, while being also to cause China's pelletizing
Mineral amount compared to foreign countries there are larger gaps the main reason for.Bentonite has thermostabilization as the most common pelletizing binder
The feature that property is good, viscosity is high, cheap and easy to get, is widely used in pelletizing production.And contain a large amount of SiO2, Al2O3 in bentonite,
These ingredients can not only reduce pellet Iron grade, but also it is more to will cause slag discharge amount, unfavorable to maintaining blast furnace.Due to domestic steel
Factory's profit margin is lower, can not only improve production cost using organic binder, can also comb to the chain for needing higher preheating temperature
Machine-rotary kiln technology affects, this brings certain difficulty to the application of organic binder.Therefore a kind of adhesive property is provided
Good bentonite pellet binder, while meeting the purpose for reducing production cost, improving benefit.
Summary of the invention
The object of the invention is to remedy the disadvantages of known techniques, provides a kind of pellet binder bentonitic processing
Method.
The present invention is achieved by the following technical solutions:
A kind of bentonitic processing method of pellet binder, comprising the following specific steps
(1) bentonite material is added in strength slurry equipment and is cleaned, clear water is added into agitator makes bentonite slurry
Concentration control 10%, and mixings sufficiently is broken up by Pulp pump, being then pressed into diameter with the pressure of 0.1MPa is 150mm's
It is classified in cyclone, it is 7-7.5% that obtained overflow, which is diluted with water to concentration, then is with the pressure indentation diameter of 0.2MPa
It is classified in the cyclone of 75mm, obtained overflow is filtered by vacuum, and obtained precipitating be dried in vacuo stand-by；
(2) calcium-base bentonite after step (1) purification is put into high speed disperser, a certain amount of deionized water is added and is configured to
Concentration be 10% bentonite suspension, a certain amount of sodium carbonate is added and stirs sodium at normal temperature, add light calcined magnesia and
Sodium pyrophosphate continues to be dispersed with stirring 1-1.5h at normal temperature, be filtered, washed, dried, crush after obtain superfine natrium bentonite；
(3) cmc soln that mass fraction is 1%, stirring will be added in the superfine natrium bentonite of step (2) preparation
The moisture content that glucose solution is added after mixing, and adds deionized water to system is 20%, and mixture is transferred to spiral and is squeezed
It squeezes 3-4 times in pressure, while dewatered drying is ground into fine powder, is packed after being cooled to room temperature.
A kind of bentonitic processing method of pellet binder, the additive amount of sodium carbonate described in step (2) are purification
The 3-3.5% of calcium-base bentonite weight.
A kind of bentonitic processing method of pellet binder, the additive amount of light calcined magnesia described in step (2) are
Purify the 0.6-0.8% of calcium-base bentonite weight.
A kind of bentonitic processing method of pellet binder, the additive amount of sodium pyrophosphate described in step (2) are to mention
The 0.40-0.44% of pure calcium-base bentonite weight.
A kind of bentonitic processing method of pellet binder, the additive amount of carboxymethyl cellulose described in step (3)
For the 2.9-3.1% of superfine natrium bentonite weight.
A kind of bentonitic processing method of pellet binder, the additive amount of glucose solution described in step (3) are
The 0.5-0.6% of superfine natrium bentonite weight.
The invention has the advantages that the present invention is to improve bentonite pellet binder to fall reduction compression strength of green pel let and reduction
Bentonite raw ore is passed through purification by mineral using hydrocyclone, improves the content of montmorillonite in raw ore, benefit by the problem of lower intensity
It is beaten processing with the cyclone crossfire of diameter 150mm and diameter 75mm, the bentonite montmorillonite after purification is high, passes through high speed
Dispersion machine stirs bentonite as modifying agent as dispersing agent, sodium carbonate and light calcined magnesia as dispersing apparatus, sodium pyrophosphate
Sodium is mixed, ultra-fine sodium-ionized bentonite is obtained, while adding glucose solution and carboxymethyl cellulose in ultra-fine sodium-ionized bentonite,
The adhesive property of pellet binder is improved, and does not influence greenball properties, additionally it is possible to reduce bentonitic additive amount, reduce production
Cost, pellet binder provided by the invention pelletizing effect in pelletizing is good, and green ball strength is high, and adds when bentonite modified
The light calcined magnesia added improves the burst temperature of pelletizing in green-ball high-temperature roasting, improves the metallurgical performance of pellet, the present invention
The pellet binder application method of offer is simple, and effect is good, is free of any harmful element, is worthy to be popularized.
Specific embodiment
A kind of bentonitic processing method of pellet binder, comprising the following specific steps
(1) bentonite material is added in strength slurry equipment and is cleaned, clear water is added into agitator makes bentonite slurry
Concentration control 10%, and mixings sufficiently is broken up by Pulp pump, being then pressed into diameter with the pressure of 0.1MPa is 150mm's
It is classified in cyclone, it is 7% that obtained overflow, which is diluted with water to concentration, then being pressed into diameter with the pressure of 0.2MPa is 75mm
Cyclone in be classified, obtained overflow is filtered by vacuum, and obtained precipitating be dried in vacuo stand-by；
(2) calcium-base bentonite after step (1) purification is put into high speed disperser, a certain amount of deionized water is added and is configured to
The sodium carbonate of the bentonite suspension that concentration is 10%, the calcium-base bentonite weight 3% after purification is added stirs sodium at normal temperature,
0.40% sodium pyrophosphate of 0.6% light calcined magnesia and purification calcium-base bentonite weight that add purification calcium-base bentonite weight exists
Continue to be dispersed with stirring 1h under room temperature, be filtered, washed, dried, crush after obtain superfine natrium bentonite；
(3) cmc soln that mass fraction is 1% will be added in the superfine natrium bentonite of step (2) preparation, wherein
The additive amount of carboxymethyl cellulose is the 2.9% of superfine natrium bentonite weight, and superfine natrium bentonite weight is added after stirring and evenly mixing
The glucose solution of amount 0.5%, and the moisture content for adding deionized water to system is 20%, and mixture is transferred to screw extrusion
It is middle to squeeze 3 times, while dewatered drying is ground into fine powder, packs after being cooled to room temperature.
Claims (6)
1. a kind of bentonitic processing method of pellet binder, which is characterized in that comprising the following specific steps
(1) bentonite material is added in strength slurry equipment and is cleaned, clear water is added into agitator makes bentonite slurry
Concentration control 10%, and mixings sufficiently is broken up by Pulp pump, being then pressed into diameter with the pressure of 0.1MPa is 150mm's
It is classified in cyclone, it is 7-7.5% that obtained overflow, which is diluted with water to concentration, then is with the pressure indentation diameter of 0.2MPa
It is classified in the cyclone of 75mm, obtained overflow is filtered by vacuum, and obtained precipitating be dried in vacuo stand-by；
(2) calcium-base bentonite after step (1) purification is put into high speed disperser, a certain amount of deionized water is added and is configured to
Concentration be 10% bentonite suspension, a certain amount of sodium carbonate is added and stirs sodium at normal temperature, add light calcined magnesia and
Sodium pyrophosphate continues to be dispersed with stirring 1-1.5h at normal temperature, be filtered, washed, dried, crush after obtain superfine natrium bentonite；
(3) cmc soln that mass fraction is 1%, stirring will be added in the superfine natrium bentonite of step (2) preparation
The moisture content that glucose solution is added after mixing, and adds deionized water to system is 20%, and mixture is transferred to spiral and is squeezed
It squeezes 3-4 times in pressure, while dewatered drying is ground into fine powder, is packed after being cooled to room temperature.
2. a kind of bentonitic processing method of pellet binder according to claim 1, which is characterized in that step (2)
Described in sodium carbonate additive amount be purify calcium-base bentonite weight 3-3.5%.
3. a kind of bentonitic processing method of pellet binder according to claim 1, which is characterized in that step (2)
Described in light calcined magnesia additive amount be purify calcium-base bentonite weight 0.6-0.8%.
4. a kind of bentonitic processing method of pellet binder according to claim 1, which is characterized in that step (2)
Described in sodium pyrophosphate additive amount be purify calcium-base bentonite weight 0.40-0.44%.
5. a kind of bentonitic processing method of pellet binder according to claim 1, which is characterized in that step (3)
Described in carboxymethyl cellulose additive amount be superfine natrium bentonite weight 2.9-3.1%.
6. a kind of bentonitic processing method of pellet binder according to claim 1, which is characterized in that step (3)
Described in glucose solution additive amount be superfine natrium bentonite weight 0.5-0.6%.
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| CN201811121565.XA CN109136546A (en) | 2018-09-26 | 2018-09-26 | A kind of bentonitic processing method of pellet binder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136487A (en) * | 2021-04-07 | 2021-07-20 | 内蒙古金辉稀矿股份有限公司 | Preparation process of bentonite additive based on pellet production |
| CN113621796A (en) * | 2021-08-25 | 2021-11-09 | 辽宁鑫浩膨润土有限责任公司 | Modified bentonite for metallurgical pellets and production process thereof |
| CN114635036A (en) * | 2022-02-24 | 2022-06-17 | 包头钢铁（集团）有限责任公司 | Method for establishing bentonite index and particle size composition of mixed iron material for iron ore pellet preparation |
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| EP0413603A1 (en) * | 1989-08-18 | 1991-02-20 | Ciba Specialty Chemicals Water Treatments Limited | Agglomeration of particulate materials |
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| CN101797625A (en) * | 2010-03-12 | 2010-08-11 | 厦门大学 | Method for improving strength of molding sand |
| CN103896294A (en) * | 2014-03-26 | 2014-07-02 | 芜湖恒杰膨润土科技有限公司 | Artificial sodium bentonite |
| CN104030308A (en) * | 2014-06-05 | 2014-09-10 | 河海大学 | Method for preparing salt-resistant stain-resistant bentonite with adsorption function |
| CN107252873A (en) * | 2017-06-20 | 2017-10-17 | 广西大学 | A kind of hot investment casting is with bentonitic half-dried preparation method |
| CN107723465A (en) * | 2017-09-28 | 2018-02-23 | 毕德玉 | A kind of compound method of pelletizing binding agent containing magnesium |
-
2018
- 2018-09-26 CN CN201811121565.XA patent/CN109136546A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0413603A1 (en) * | 1989-08-18 | 1991-02-20 | Ciba Specialty Chemicals Water Treatments Limited | Agglomeration of particulate materials |
| CN101224894A (en) * | 2008-01-23 | 2008-07-23 | 苏州中材非金属矿工业设计研究院有限公司 | Method for preparing heavy-viscous organophilic bentonite |
| CN101797625A (en) * | 2010-03-12 | 2010-08-11 | 厦门大学 | Method for improving strength of molding sand |
| CN103896294A (en) * | 2014-03-26 | 2014-07-02 | 芜湖恒杰膨润土科技有限公司 | Artificial sodium bentonite |
| CN104030308A (en) * | 2014-06-05 | 2014-09-10 | 河海大学 | Method for preparing salt-resistant stain-resistant bentonite with adsorption function |
| CN107252873A (en) * | 2017-06-20 | 2017-10-17 | 广西大学 | A kind of hot investment casting is with bentonitic half-dried preparation method |
| CN107723465A (en) * | 2017-09-28 | 2018-02-23 | 毕德玉 | A kind of compound method of pelletizing binding agent containing magnesium |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136487A (en) * | 2021-04-07 | 2021-07-20 | 内蒙古金辉稀矿股份有限公司 | Preparation process of bentonite additive based on pellet production |
| CN113621796A (en) * | 2021-08-25 | 2021-11-09 | 辽宁鑫浩膨润土有限责任公司 | Modified bentonite for metallurgical pellets and production process thereof |
| CN114635036A (en) * | 2022-02-24 | 2022-06-17 | 包头钢铁（集团）有限责任公司 | Method for establishing bentonite index and particle size composition of mixed iron material for iron ore pellet preparation |
| CN114635036B (en) * | 2022-02-24 | 2024-01-30 | 包头钢铁（集团）有限责任公司 | Method for establishing bentonite index and mixed iron material granularity composition for preparing iron ore pellets |
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