CN101195856A - Production process for reducing metallurgy ball group alta-mud using amount - Google Patents
Production process for reducing metallurgy ball group alta-mud using amount Download PDFInfo
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- CN101195856A CN101195856A CNA2007101108827A CN200710110882A CN101195856A CN 101195856 A CN101195856 A CN 101195856A CN A2007101108827 A CNA2007101108827 A CN A2007101108827A CN 200710110882 A CN200710110882 A CN 200710110882A CN 101195856 A CN101195856 A CN 101195856A
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Abstract
The invention discloses a production method for reducing the bentonite clay quantity of metallurgical pellet, which comprises the following steps: the iron ore of laterite type iron ore is ground into laterite type iron ore powder occupying 90 percent and having 200 meshes of grains, the ground laterite type iron ore powder and the bentonite clay are allocated into the pellet refined powder to be mixed together, and then the mixed powder is filled into the pellet producing device; slurry form bonding agent is sprayed on the iron ore powder in the pellet producing device, to cause the iron ore powder to form into pellets under the effect of the slurry form bonding agent. Slurry spraying is adopted to replace water spraying in the invention, mud pies are formed after the sprayed slurry form bonding agent falls on the mixed material, under the function of rolling mechanical force, the slurry form bonding agent is squeezed on the surface of the pellet from the mud pies, and a layer of iron ore powder is stuck on the surface, after the repeatedly sticking, the qualified pellets are discharged from the pellet producing device, as a result, not too much bentonite clay is required to be added into the iron refined powder, the content of the bentonite clay in the produced metallurgical pellet is greatly reduced, the quality of the metallurgical pellet is enhanced, and simultaneously the efficiency of ironmaking is enhanced.
Description
Technical field
The present invention relates to a kind of metallurgical technology field, specifically a kind of technology of production metallurgy pelletizing.
Background technology
Metallurgical briquetting with powdered iron ore add tackiness agent in balling equipment, make ball after roasting form.The tackiness agent that metallurgical briquetting uses is generally two big classes: the one, and organic binder bond, the 2nd, inorganic adhesive.Organic binder bond price height, consumption disperse difficulty and less to powdered iron ore and pellet forming process requirement harshness, the less use of China.Inorganic adhesive mainly is a wilkinite, and part is used lime or other clay class tackiness agents.China's bentonite resource is abundant, and the exploitation tooling cost is low, adaptability is strong, controlled range is wide, is main pelletizing binder.
In the prior art, the process of utilizing swelling to make ball with local methods is, moisture powdered iron ore and wilkinite prepared burden in proportion after stirring, enter balling equipment, in this process, moisture in the dry powder wilkinite absorption powdered iron ore is molten to be " glue " shape, in powdered iron ore and bentonitic mixture, spraying water on the balling equipment, by the surface tension of water that the compound of powdered iron ore and " glue " is poly-agglomerating.Under the effect of balling equipment rolling machine power, " glue " in the agglomerate from inside to outside squeezes row, the mixed powder of bonding powdered iron ore and " glue " behind the pelletizing surface, and so repeated multiple times makes ball grow up into qualified pelletizing and discharges balling equipment.
In above-mentioned technological process, two problems are arranged, the one, wilkinite aquation adequate time is longer, the general aquation of calcium-base bentonite fully must be more than one hour, artificial natridization's composite bentonite aquation fully must be more than two hours, and the above-mentioned technological process of general pelletizing enterprise about one hour even still less, see from the abundant this point of aquation and can only use calcium-base bentonite, but the viscosity of calcium-base bentonite is the 1/3-1/5 of artificial natridization's composite bentonite, and it is can not aquation abundant just to have nearly half soil with artificial natridization's composite bentonite; The 2nd, make the outer mixed powder that is discharged to bonding powdered iron ore and " glue " behind the pelletizing surface of " glue " in the agglomerate in the balling equipment in the ball process, and " glue " in the mixed powder is unnecessary, it has not only increased bentonitic consumption, and make pelletizing surface " glue " many, stop the evaporation of the follow-up drying process steam of pelletizing, easily make the pelletizing explosion.
In addition, what general pelletizing used is the magnetic separation magnetite, and water has washed away the fine grain particle breeze of 0-800 purpose in the magnetic separation process, and when making ball, the gap between the breeze of volume particle size just need be filled with wilkinite, has further increased bentonitic consumption.Wilkinite accounts for the 1-5% of pelletizing composition in the prior art, and the whole nation is average more than 2.5%, has a strong impact on pelletizing grade and ironmaking benefit.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of production technique of metallurgical briquetting, can reduce bentonitic consumption when making ball greatly, improves the grade and the ironmaking benefit of pelletizing.
The technical solution adopted for the present invention to solve the technical problems is:
The bentonitic production method of a kind of reduction metallurgical briquetting comprises following one or several step:
Red ore deposit iron ore is ground to form 200 order particles account for red breeze more than 90%, and the red breeze after will grinding presses 3--5%, wilkinite 0.6-1%, the mixed of the fine ore 96-97.4% balling equipment of evenly packing into;
Spray paste binder on the powdered iron ore in balling equipment, make powdered iron ore under the paste binder effect, form pelletizing.
Describedly red ore deposit iron ore is ground to form red breeze adopt the dry method fine grinding to form.
Described paste binder is a converter steelmaking water dedusting mud slurry, and concentration is 20%--40%.
Described paste binder is mixed by following components by weight ratio:
Artificial natridization's wilkinite: 10～20%; Water: 80～90%.
Described paste binder mixes by following components by weight ratio:
Pelletizing organic gel: 5-10 ‰; Water: 990～995 ‰.
The present invention adopts whitewashing to replace water spray technology of the prior art, the paste binder that is sprayed is fallen and is become walk on the compound, under the effect of balling equipment rolling machine power, paste binder squeezes from walk and is discharged to pelletizing surface adhesion last layer powdered iron ore, be bonded to qualified pelletizing repeatedly and discharge balling equipment, so just need not in powdered iron ore, to add too many wilkinite, greatly reduce bentonitic content in the made metallurgical briquetting, improve the grade of metallurgical briquetting, improved ironmaking efficient simultaneously.The present invention adopts the more sticking red ore deposit of dry grinding iron ore to fill gap between the breeze of magnetite volume particle size.
Embodiment
Embodiment one:
Certain steel mill's rotary kiln pelletizing, the damp mill mixing equipment is arranged, produce 1200000 tons of pelletizings per year, the common calcium-base bentonite of former use, pelletizing wilkinite component content 3.8%, pelletizing grade 62%, after using the steel-making dedusting mud slurry of 40% concentration, adapted artificial natridization wilkinite 0.8%, the pelletizing grade brings up to 64%, and year increases benefit 1,800 ten thousand yuan.
Embodiment two:
Certain 10m of steel mill
2Palletizing shaft furnace has the damp mill mixing equipment, produces 500000 tons of pelletizings per year, the artificial sodium-ionized bentonite of former use, bentonite content 1.4% in the pelletizing composition, use the steel-making dedusting mud slurry of 30% concentration after, bentonite content 0.8%, year increases 3000 tons of iron, 2,400,000 yuan of benefits.
Embodiment three:
Certain factory's rotary kiln pelletizing, the intensive mixer mixing equipment is arranged, produce 2000000 tons of pelletizings per year, the common calcium-base bentonite of former use, pelletizing composition bentonite content 2.8%, pelletizing grade 62%, after adapted 5% ground hematite uses the artificial bentonite slurry of 20% concentration, bentonite content 0.6%, the pelletizing grade brings up to 63.5%, and year boosts sales and sells 3,000 ten thousand yuan of profits.
Embodiment four:
Certain 10m of steel mill
2Palletizing shaft furnace has the damp mill mixing equipment, produces 500000 tons of pelletizings per year, the artificial sodium-ionized bentonite of former use, bentonite content 1.5% in the pelletizing composition, bentonite content 0.6% behind adapted 5% ground hematite, 3000 tons of Nian Zengtie, 4,000,000 yuan of benefits (the ground hematite price is lower than the smart powder of iron).
Embodiment five:
Certain 8m of steel mill
2Palletizing shaft furnace has the damp mill mixing equipment, produces 400000 tons of pelletizings per year, the artificial sodium-ionized bentonite of former use, bentonite content 1.3% in the pelletizing composition. use the pelletizing organic gel tackiness agent whitewashing of 7 ‰ concentration, bentonite content 0.6%, year increases 2000 tons of iron, 1,600,000 yuan of benefits.Pelletizing organic gel tackiness agent is the commercially available prod.
Embodiment six:
Certain 10m of steel mill
2Palletizing shaft furnace, the damp mill mixing equipment is arranged, produce 500000 tons of pelletizings per year, the artificial sodium-ionized bentonite of former use, bentonite content 1.4% in the pelletizing composition, and adapted 5% ground hematite uses the pelletizing organic gel tackiness agent whitewashing of 5 ‰ concentration, bentonite content 0.5%, 3000 tons of Nian Zengtie, and cancelled the damp mill mixing equipment, 5,000,000 yuan of year saving damp mill equipment running costs.
Embodiment seven:
Certain 8m of steel mill
2Palletizing shaft furnace, the damp mill mixing equipment is arranged, produce 400000 tons of pelletizings per year, the common calcium-base bentonite of former use, bentonite content 2.4% in the pelletizing composition, uses the pelletizing organic gel tackiness agent whitewashing of 10 ‰ concentration, bentonite content 1.0%, cancelled the damp mill mixing equipment, 4,000,000 yuan of year saving damp mill equipment running costs.5000 tons of Nian Zengtie, 4,000,000 yuan of benefits.
Embodiment eight:
Certain factory's rotary kiln pelletizing, the intensive mixer mixing equipment is arranged, produce 2000000 tons of pelletizings per year, the artificial sodium-ionized bentonite of former use, pelletizing composition bentonite content 2.2%. use the pelletizing organic gel tackiness agent whitewashing of 5 ‰ concentration, bentonite content 1.0%, the pelletizing grade has improved 1%, and year boosts sales and sells 2,000 ten thousand yuan of profits.
The example explanation:
Red ore deposit refers to that rhombohedral iron ore, limonite, spathic iron ore, pelletizing return mine etc.;
Each factory's bentonite consumption is different, and major cause is that employed powdered iron ore granularity is different, and granularity is thick more, and the space is big more, and it is many more that filling of needing added thing, and bentonite consumption is big more.Many producers use damp mill (actual is the dry ball that moisture is arranged), add thing and dispersion wilkinite and increase active in order that the increase particulate fills.The concentration of whitewashing is according to mixture moisture and fixed.
Claims (5)
1. production method that reduces metallurgy ball group alta-mud using amount comprises following one or several step:
Red ore deposit iron ore ground to form 200 order particles account for red breeze more than 90%, and the red breeze after will grinding presses 3--5%, wilkinite O.6-1%, the mixed of the fine ore 96-97.4% balling equipment of evenly packing into;
Spray paste binder on the powdered iron ore in balling equipment, make powdered iron ore under the paste binder effect, form pelletizing.
2. the production method of reduction metallurgy ball group alta-mud using amount according to claim 1 is characterized in that, describedly red ore deposit iron ore is ground to form red breeze adopts the dry method fine grinding to form.
3. the production method of reduction metallurgy ball group alta-mud using amount according to claim 1 is characterized in that, described paste binder is a converter steelmaking water dedusting mud slurry, and concentration is 20%--40%.
4. the production method of reduction metallurgy ball group alta-mud using amount according to claim 1 is characterized in that, described paste binder is mixed by following components by weight ratio:
Artificial natridization's wilkinite: 10～20%; Water: 80～90%.
5. the production method of reduction metallurgy ball group alta-mud using amount according to claim 1 is characterized in that, described paste binder mixes by following components by weight ratio:
Pelletizing organic gel: 5-10 ‰; Water: 990～995 ‰.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710110882A CN100577828C (en) | 2007-06-13 | 2007-06-13 | Production process for reducing metallurgy ball group alta-mud using amount |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710110882A CN100577828C (en) | 2007-06-13 | 2007-06-13 | Production process for reducing metallurgy ball group alta-mud using amount |
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| Publication Number | Publication Date |
|---|---|
| CN101195856A true CN101195856A (en) | 2008-06-11 |
| CN100577828C CN100577828C (en) | 2010-01-06 |
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| CN200710110882A Expired - Fee Related CN100577828C (en) | 2007-06-13 | 2007-06-13 | Production process for reducing metallurgy ball group alta-mud using amount |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010078638A1 (en) * | 2009-01-09 | 2010-07-15 | Minesteel Representação E Comércio Ltda | Process for implementing and improving pellet feed by using fines from steel works |
| CN105154666A (en) * | 2015-08-20 | 2015-12-16 | 四川德胜集团钒钛有限公司 | Pelletizing method for reducing bentonite consumption |
| CN105506273A (en) * | 2014-09-26 | 2016-04-20 | 鞍钢股份有限公司 | Method for adding red mud into pellets |
| CN106191429A (en) * | 2016-08-09 | 2016-12-07 | 重庆大学 | A kind of city sewage sludge reclamation Application way |
| CN106755982A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of bentonite distribution and device |
| CN115747483A (en) * | 2022-12-26 | 2023-03-07 | 中天钢铁集团(南通)有限公司 | Production method of zero-bentonite pellets |
-
2007
- 2007-06-13 CN CN200710110882A patent/CN100577828C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010078638A1 (en) * | 2009-01-09 | 2010-07-15 | Minesteel Representação E Comércio Ltda | Process for implementing and improving pellet feed by using fines from steel works |
| CN105506273A (en) * | 2014-09-26 | 2016-04-20 | 鞍钢股份有限公司 | Method for adding red mud into pellets |
| CN105154666A (en) * | 2015-08-20 | 2015-12-16 | 四川德胜集团钒钛有限公司 | Pelletizing method for reducing bentonite consumption |
| CN106191429A (en) * | 2016-08-09 | 2016-12-07 | 重庆大学 | A kind of city sewage sludge reclamation Application way |
| CN106755982A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of bentonite distribution and device |
| CN106755982B (en) * | 2016-12-14 | 2018-09-11 | 四川德胜集团钒钛有限公司 | A kind of bentonite distribution and device |
| CN115747483A (en) * | 2022-12-26 | 2023-03-07 | 中天钢铁集团(南通)有限公司 | Production method of zero-bentonite pellets |
| CN115747483B (en) * | 2022-12-26 | 2024-06-07 | 中天钢铁集团(南通)有限公司 | Production method of zero bentonite pellets |
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| Publication number | Publication date |
|---|---|
| CN100577828C (en) | 2010-01-06 |
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Assignee: Xuanhua Zhongye Technology Co.,Ltd. Assignor: Ren Ruigang Contract record no.: 2011990000955 Denomination of invention: Production process for reducing metallurgy ball group alta-mud using amount Granted publication date: 20100106 License type: Exclusive License Open date: 20080611 Record date: 20110930 |
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Granted publication date: 20100106 Termination date: 20130613 |