CN1199100A - Pellet producing method using ferrous oxide steel slag - Google Patents
Pellet producing method using ferrous oxide steel slag Download PDFInfo
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- CN1199100A CN1199100A CN 97108062 CN97108062A CN1199100A CN 1199100 A CN1199100 A CN 1199100A CN 97108062 CN97108062 CN 97108062 CN 97108062 A CN97108062 A CN 97108062A CN 1199100 A CN1199100 A CN 1199100A
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- slag
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- ferrous oxide
- ball
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Abstract
A method for producing pellet with ferrous oxide slags includes grinding the ferrous oxide slags, mixing it with iron-containing industrial dust and additive (bentone and/or sodium carbonate and/or carboxymethylcellulose), pelletizing and calcining, and features recovery of iron resource, reducing environmental pollution, and low cost.
Description
The present invention relates to the preliminary treatment of ore or waste material, particularly utilize the method for the slag production pellet that contains iron protoxide.
In order to improve iron-smelting furnace ironmaking output, through using agglomerate always as part of raw materials.Agglomerate is to make main raw material with powdered iron ore at present.The slag that contains iron protoxide in a large number that produces for steel-making, steel rolling does not obtain utilizing, and has become the refuse of contaminate environment.Produce during steelworks steel-making and contain ferrous oxide steel slag (hereinafter to be referred as slag) in a large number.By producing 1000000 tons of steel per year, produce ten thousand tons of slag 3-5 as openhearth steelmaking, all iron content is at 55%-66% in the slag.Steel Mill also produces when heating steel ingot or steel billet and contains ferrous oxide steel slag (hereinafter to be referred as slag) in a large number, and 1,000,000 tons of meters of stocking produce ten thousand tons of 1-3 of slag (this type of slag claims liquid slag or furnace bottom slag again), all iron content 68%-70% in the slag per year.Though their iron content composition is high, directly drop into when iron-smelting blast furnace is smelted and be difficult to reduction, and the coke ratio increase, be difficult to be accepted by people, can't carry out utilization of waste material.Both pollute environment, caused the iron resources waste again.
The purpose of this invention is to provide the method that a kind of slag that contains iron protoxide that utilizes iron and steel enterprise to produce is produced pellet.
Task of the present invention realizes with following mode: the method main raw material that utilizes ferrous oxide steel slag to produce pellet is slag and the ferruginous industrial dust that contains the slag of iron protoxide or contain iron protoxide, and adding additive: the doping mixing is made ball after wilkinite or sodium bicarbonate or carboxymethyl cellulose or their combination, the slag crushing that will contain iron protoxide and abrasive dust, roasting becomes pellet.Granularity accounts for total amount 40%--60% after containing the slag abrasive dust of iron protoxide below 200 orders.The consumption of additive is respectively: wilkinite 5-15 kilogram/ball per ton ore deposit, sodium bicarbonate 0.2-0.8 kilogram/ball per ton ore deposit, carboxymethyl cellulose 10-40 gram/ball per ton ore deposit.Also can add the fuel that coke powder is made the roasting pellet according to different sinter processs.
But the environmental pollution that the present invention's comprehensive regulation Steel Plant slag causes also has great role to recycling iron dust containing.Recyclable a large amount of iron resourcess of while.Producing the pellet cost and reduce by 25% at least than producing the pellet per ton cost with fine iron breeze, is the important channel that iron and steel enterprise reduces production costs.The pellet that this law is produced can be used for blast furnace and makes iron-smelting raw material and make to produce the direct-reduced iron raw material.
The present invention utilizes slag behind broken and abrasive dust, requires the following granularity of 200 orders to account for the 40%-60% of total amount, and the doping mixing is made ball, roasting.Can produce all iron content 〉=67%, the acidic pellet ore of FeO≤5% makes to produce the direct-reduced iron raw material.Contain the improvement of Fe dust in conjunction with iron and steel enterprise's industry, can produce the acidic pellet ore of all iron content 〉=60%, FeO≤5% as blast furnace ironmaking raw material with addition of a certain amount of dust, for shaft kiln and " blow on the level land " local method agglomerates of sintered pellets miner skill, on above-mentioned batching basis, also need add coke powder (requiring the following granularity of 200 orders to account for total amount 40%-60%), as the fuel of roasting pellet.
Embodiment 1: the slag crushing that adopts Steel Mill, 700 kilograms of abrasive dusts, 300 kilograms of open hearth electric precipitation iron dust containings, add coke powder by pellet power consumption 20-25 ten thousand kilojoules per ton, 8-10 kilogram in the swelling, 0.4 kilogram of sodium bicarbonate, make main raw material and additive, the water of 8%-10% will be added behind above-mentioned raw materials and the additive mixing, add carboxymethyl cellulose 20 grams in the water and make ball, require the spherolite degree even, sphere diameter 10-16 millimeter accounts for total amount more than 85%, green ball strength highly freely falls three times in 500 millimeters in dried up mud ground face and crackle do not occur, make behind the ball at shaft kiln or " blow on the level land " sintering kiln roasting, 1280 ℃ to 1350 ℃ of maturing temperatures, sinter process is with general shaft kiln and " blow on the level land " local method sintering process.Can produce the acidic pellet ore of all iron content 〉=62%, FeO≤5%, can be used for heat size blast furnace below 1000 cubic metres and make iron-smelting raw material.
Embodiment 2: 600 kilograms of slag crushing, the abrasive dusts of employing steelworks, 200 kilograms of the slag crushing abrasive dusts of Steel Mill, open hearth electric precipitation contain 200 kilograms in Fe dust, 10 kilograms of wilkinites, 0.4 kilogram of sodium bicarbonate, add water 8%-10% behind the mixing and make ball.To the requirement of the granularity behind green-ball sphere diameter, requirement of strength and the slag abrasive dust, iron dust containing granularity with embodiment 1.The dry laggard shaft roasting of green-ball, 1280 ℃-1350 ℃ of maturing temperatures, pellet gas consumption 40-50 ten thousand kilojoules per ton, sinter process is with general shaft roasting technology.Can produce all iron content 〉=60%, FeO≤5% acidic pellet ore, can be used for various blast furnaces and make iron-smelting raw material.
Iron-containing dusts in steel plant is a lot, as blast furnace dust, and open hearth, converter, electric furnace dust, steel rolling iron sheet etc.In conjunction with the improvement of industrial dust, and multiple formulations can be arranged according to the requirement of administering object and blast furnace production.Because of containing the difference of other metallic element except that Fe in the dust, need to add other corresponding additive.Also can produce alkaline pellet.
Claims (4)
1. method of utilizing ferrous oxide steel slag to produce pellet, it is characterized in that main raw material is slag and the ferruginous industrial dust that contains the slag of iron protoxide or contain iron protoxide, and adding additive: the doping mixing is made ball after wilkinite or sodium bicarbonate or carboxymethyl cellulose or their combination, the slag crushing that will contain iron protoxide and abrasive dust, roasting becomes pellet.
2. produce the method for pellet according to the described slag of claim 1, it is characterized in that containing the slag abrasive dust of iron protoxide after granularity below 200 orders, account for total amount 40%--60%.
3. the method for producing pellet according to the described slag of claim 1 is characterized in that the consumption of additive is respectively: wilkinite 5-15 kilogram/ball per ton ore deposit, sodium bicarbonate 0.2-0.8 kilogram/ball per ton ore deposit, carboxymethyl cellulose 10-40 gram/ball per ton ore deposit.
4. the method for producing pellet according to the described slag of claim 1 is characterized in that also can adding the fuel that coke powder is made the roasting pellet according to different sinter processs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97108062 CN1199100A (en) | 1997-05-08 | 1997-05-08 | Pellet producing method using ferrous oxide steel slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97108062 CN1199100A (en) | 1997-05-08 | 1997-05-08 | Pellet producing method using ferrous oxide steel slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1199100A true CN1199100A (en) | 1998-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97108062 Pending CN1199100A (en) | 1997-05-08 | 1997-05-08 | Pellet producing method using ferrous oxide steel slag |
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| CN (1) | CN1199100A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051473A (en) * | 2010-12-14 | 2011-05-11 | 山东创新腐植酸科技股份有限公司 | Preparation method of non-sintered carbon-bearing iron pellets |
| CN104152674A (en) * | 2014-08-28 | 2014-11-19 | 内蒙古包钢钢联股份有限公司 | Steel slag roasting dephosphorization method |
| CN105567954A (en) * | 2016-01-15 | 2016-05-11 | 张学军 | Method for preparing alkaline pellets through steel slag and product prepared with method |
| CN107488784A (en) * | 2017-09-06 | 2017-12-19 | 安徽工业大学 | A kind of blast furnace ironmaking superfluxed pellets and its production method |
| CN111910072A (en) * | 2020-09-09 | 2020-11-10 | 鞍钢股份有限公司 | Preparation and use methods of pre-reduced fluxed pellets with steel slag as partial raw material |
-
1997
- 1997-05-08 CN CN 97108062 patent/CN1199100A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051473A (en) * | 2010-12-14 | 2011-05-11 | 山东创新腐植酸科技股份有限公司 | Preparation method of non-sintered carbon-bearing iron pellets |
| CN102051473B (en) * | 2010-12-14 | 2012-07-04 | 山东创新腐植酸科技股份有限公司 | Preparation method of non-sintered carbon-bearing iron pellets |
| CN104152674A (en) * | 2014-08-28 | 2014-11-19 | 内蒙古包钢钢联股份有限公司 | Steel slag roasting dephosphorization method |
| CN105567954A (en) * | 2016-01-15 | 2016-05-11 | 张学军 | Method for preparing alkaline pellets through steel slag and product prepared with method |
| CN105567954B (en) * | 2016-01-15 | 2017-10-20 | 张学军 | Utilize method and obtained by this method product of the prepared from steel slag for Basic Pellets |
| CN107488784A (en) * | 2017-09-06 | 2017-12-19 | 安徽工业大学 | A kind of blast furnace ironmaking superfluxed pellets and its production method |
| CN107488784B (en) * | 2017-09-06 | 2019-07-26 | 安徽工业大学 | A kind of blast furnace ironmaking superfluxed pellets and its production method |
| CN111910072A (en) * | 2020-09-09 | 2020-11-10 | 鞍钢股份有限公司 | Preparation and use methods of pre-reduced fluxed pellets with steel slag as partial raw material |
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