CN102051473B - Preparation method of non-sintered carbon-bearing iron pellets - Google Patents
Preparation method of non-sintered carbon-bearing iron pellets Download PDFInfo
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- CN102051473B CN102051473B CN2010105871392A CN201010587139A CN102051473B CN 102051473 B CN102051473 B CN 102051473B CN 2010105871392 A CN2010105871392 A CN 2010105871392A CN 201010587139 A CN201010587139 A CN 201010587139A CN 102051473 B CN102051473 B CN 102051473B
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- iron ball
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- slag powder
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Abstract
The invention relates to a preparation method of non-sintered carbon-bearing iron pellets, comprising the following steps: mixing pulverized combustion media and steel slag powder, then adding adhesive in proportion, wherein the components in proportion are as follows: 5-20% of combustion media, 76-93% of steel slag powder and 2-4% of adhesive; adding a proper amount of water and stirring evenly, adding into a double roller type forming machine for extrusion forming, then stacking, curing and drying until the moisture content of the cured pellets is smaller than 4% to obtain the non-sintered carbon-bearing iron pellets. The combustion media comprise anthracite duff, blue carbon powder and coke powder; the steel slag powder is iron-containing slag formed by crushing, grinding and magnetically separating steelmaking slag, and the iron content of the steel slag powder is greater than or equal to 50%; the adhesive is compounded from dry powdered coal adhesive and sodium silicate in proportion of 80-90%:10-20%; and the curing temperature is 20-60 DEG C, the stacking time is 10-30 hours, and the drying temperature is 100-400 DEG C. The invention can save energy consumption, reduce pollution, reduce cost and improve efficiency.
Description
Technical field
The present invention relates to smelt and use the charcoal iron material, relate in particular to the making of charcoal iron ball group.
Background technology
Blast furnace ironmaking Technology in the history of last 100 years is improved ripe day by day, in large scale development, has brought problems such as technical process is long, investment is big, seriously polluted, and coking coal belongs to rare coal, also can increase consumption and pollute in the process of coking.The charcoal iron ball group that the present domestic smelting pig iron adopts; General all is after earlier the smart powder of iron being added bentonite or sticker and 4～6% coke powder mixes; Process pelletizing; Process pelletizing or agglomerate through shaft furnace or with the sinter machine sintering then, after cooling, carry out fragmentation again, add puddler with coke and smelt into molten iron.Steel-making slag powder only adds a spot of ratio and participates in sintering as auxiliary material, also need add solvent and bituminous coal in the technical process that has.This technological process flow process is long; Can produce a large amount of smoke contamination air in the sintering process; Have the returning charge about 20% to repeat sintering approximately, consume a large amount of blast furnace gas, coke powder and electric power in the sintering process, the sintering circuit energy consumption accounts for smelts about 12% of total energy consumption.
Summary of the invention
The object of the invention just provides the making method that a kind of unburned knot charcoal iron ball is rolled into a ball, and is the main raw material extrusion molding with the steel-making slag powder; Needn't add bituminous coal and solvent, can go into stove without sintering and smelt, technical process is short; Energy-conserving and environment-protective, cost is low, efficient is high, increases economic benefit.
Task of the present invention is to accomplish like this: study the preparation method of a kind of unburned knot charcoal iron ball group, be with the combustion medium after pulverizing with after steel-making slag powder is mixed, add tackiness agent in proportion; Its set of dispense ratio is: combustion medium 5～20%, steel-making slag powder 76～93%, and tackiness agent 2～4% adds after amount of water stirs again; Add extrusion molding in the pair roller type shaper; Bank up again, solidify, drying, to the water cut of solidifying pelletizing＜4%, promptly process and exempt from agglomerating charcoal iron ball group.Combustion medium comprises pulverized anthracite, blue powdered carbon, coke powder.Steel-making slag powder is to contain scum, iron-holder >=50% with what the steel-making slag carried out forming after fragmentation, levigate, the magnetic separation.Tackiness agent is by powdered briquette adhesive and water glass is composite processes, and compound proportion is a powdered briquette adhesive 80～90%: water glass 10～20%.Bank up, solidify, drying, be with stacking outside plastic covering cloth in the charcoal iron ball agglomeration after the extrusion molding; Bank up under 20～60 ℃ of temperature be cured in 10～30 hours after; Throw off plastic cloth again, group carries out airing, oven dry with the charcoal iron ball, and bake out temperature is 100～400 ℃.Tackiness agent is selected powdered briquette adhesive (patent No. ZL200610045496X) for use, banks up, curing, time of drying confirms that according to temperature temperature is high more in above-mentioned scope, and the time is short more.The charcoal iron ball group that handles well no longer just can directly add puddler through oversintering and smelt, and in the smelting process, pulverized anthracite, coke powder, blue powdered carbon contained in the charcoal iron ball group burn, and steel-making slag powder is dissolved the formation molten iron.
Implement, test according to technique scheme, prove that technical scheme of the present invention is rationally feasible, exempt sintering, save energy consumption; Reduce smoke contamination, in smelting process, containing the charcoal material in the charcoal iron ball group can provide fuel and reductive agent, reduces the consumption of metallurgical coke; Technical process is short, and the equipment configuration is few, reduces production costs; Ensure the quality of products, enhance productivity and economic benefit, reached goal of the invention preferably.
Embodiment
Below in conjunction with instance embodiment of the present invention is specified.
Instance 1: with 50 kilograms of pulverized anthracites below the granularity 2mm, 30 kilograms of blue powdered carbons, 20 kilograms of coke powder input stirrers; Mix stirring in 870 kilograms and 40 kilograms tackiness agents addings of the steel-making slag powder stirrer with iron-holder 60% simultaneously; Suitably add small amount of moisture in the whipping process, with moistening bonding being as the criterion.After stirring, mixture is added in the pair roller type shaper, be squeezed into pelletizing, again the charcoal iron ball group after the moulding being banked up to arrange is cured, and outside plastic covering cloth maintains the temperature at 35～50 ℃.After banking up 24 hours; Throw off plastic cloth and carry out airing, or dry processing with dryer, bake out temperature is 100～400 ℃; Dry to water cut＜4%; Obtain 1000 kilograms of the charcoal iron ball groups that iron-holder 52%, sulphur phosphorus content meet smelting requirements at last, can be used as raw materials for metallurgy and directly add in the smelting furnace and smelt, produce qualified molten iron.
Instance 2: with 170 kilograms of pulverized anthracites below the granularity 2mm and 30 kilograms of blue powdered carbons input stirrers, 760 kilograms and 30 kilograms tackiness agents of steel-making slag powder of iron-holder 55% are added in the stirrer together stir simultaneously, the adding amount of water is carried out moistening; The mixture that stirs is added the pair roller type shaper be squeezed into pelletizing; With the arrangement of banking up of moulding pelletizing, plastic covering cloth keeps 20～35 ℃ of temperature then; Cover fully solidified in 30 hours after; Throw off plastic cloth and carry out airing, perhaps add in the dryer and dry, the moisture in the pelletizing is reduced to below 4%; The charcoal iron ball that meets smelting requirements that forms iron-holder 41.8% is rolled into a ball 1000 kilograms, can be used as raw materials for metallurgy and directly adds puddler ironmaking.
Instance 3:, add amount of water during stirring and carry out moistening with stirring in 930 kilograms of the steel-making slag powder of 50 kilograms of coke powders of granularity below 2mm, iron-holder 50% and 20 kilograms of adding stirrers of tackiness agent.The mixture that stirs is added the pair roller type shaper, be squeezed into pelletizing, then the pelletizing of processing is concentrated to arrange and bank up; Top plastic covering cloth maintains the temperature at 30～40 ℃, is cured 26 hours; Throw off plastic cloth and carry out airing, or put into dryer and carry out drying treatment, moisture content is reduced to below 4% in pelletizing; The charcoal iron ball that forms iron-holder 46.5% is at last rolled into a ball 1000 kilograms, can directly add puddler as raw materials for metallurgy and produce molten iron.
Tackiness agent in above-mentioned each instance; Adopt the main contriver's of the present invention patented dry powder coal briquette bond (patent No. ZL200610045496X) 80～90% to mix composite processing with water glass 10～20%, in the dryer temperature more than 100 ℃, 400 ℃ of following scopes select.
Adopt the present invention to produce charcoal iron ball group, technical process is short, and facility investment is few; Save the energy, reduce and pollute, reduce ironmaking coke consumption; Save production cost; Enhance productivity, meet national energy-saving and emission-reduction, low-carbon (LC), environmental protection policy, having widely, utilization and extention is worth and favorable social and economic benefits.
Claims (3)
1. the preparation method of a unburned knot charcoal iron ball group, it is characterized in that be with the combustion medium after pulverizing with after steel-making slag powder is mixed, add tackiness agent in proportion; Its set of dispense ratio is: combustion medium 5～20%, steel-making slag powder 76～93%; Tackiness agent 2～4% adds after amount of water stirs again, adds extrusion molding in the pair roller type shaper; Bank up again, solidify, drying; To the water cut of solidifying pelletizing＜4%, promptly to process and exempt from agglomerating charcoal iron ball group, combustion medium comprises pulverized anthracite, blue powdered carbon, coke powder; Tackiness agent is by powdered briquette adhesive and water glass is composite processes, and compound proportion is a powdered briquette adhesive 80～90%: water glass 10～20%.
2. according to the preparation method of the described unburned knot charcoal iron ball of claim 1 group, it is characterized in that said steel-making slag powder is to contain scum, iron-holder >=50% with what the steel-making slag carried out forming after fragmentation, levigate, the magnetic separation.
3. the preparation method who rolls into a ball according to the described unburned knot charcoal iron ball of claim 1; It is characterized in that saidly banking up, solidify, drying, be with stacking outside plastic covering cloth in the charcoal iron ball agglomeration after the extrusion molding; Bank up under 20～60 ℃ of temperature be cured in 10～30 hours after; Throw off plastic cloth again, group carries out airing, oven dry with the charcoal iron ball, and bake out temperature is 100～400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105871392A CN102051473B (en) | 2010-12-14 | 2010-12-14 | Preparation method of non-sintered carbon-bearing iron pellets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105871392A CN102051473B (en) | 2010-12-14 | 2010-12-14 | Preparation method of non-sintered carbon-bearing iron pellets |
Publications (2)
| Publication Number | Publication Date |
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| CN102051473A CN102051473A (en) | 2011-05-11 |
| CN102051473B true CN102051473B (en) | 2012-07-04 |
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| CN2010105871392A Expired - Fee Related CN102051473B (en) | 2010-12-14 | 2010-12-14 | Preparation method of non-sintered carbon-bearing iron pellets |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667700B (en) * | 2013-12-11 | 2016-02-10 | 四川金广实业（集团）股份有限公司 | By the production method of carbonaceous combined reducing agent smelting high carbon ferrochrome |
| CN104498708B (en) * | 2014-12-09 | 2017-07-28 | 攀枝花环业冶金渣开发有限责任公司 | Blast furnace slag fine powder prepares gained pellet and its preparation method and application |
| CN104846193A (en) * | 2015-04-16 | 2015-08-19 | 武汉科技大学 | Method for pressing steel slag into furnace charge of blast furnace |
| CN105524673A (en) * | 2015-12-24 | 2016-04-27 | 四川德胜集团钒钛有限公司 | Sintering fuel and use method thereof |
| CN108517401A (en) * | 2018-04-11 | 2018-09-11 | 广东北晟益通实业有限公司 | The carbon containing non-sintered forming brick of iron oxide, preparation method and application |
| CN112371980A (en) * | 2020-10-27 | 2021-02-19 | 安徽安庆市沙氏汽车配件有限公司 | Production process of sintering-free balance block |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199100A (en) * | 1997-05-08 | 1998-11-18 | 王瑞安 | Pellet producing method using ferrous oxide steel slag |
| CN1804057A (en) * | 2006-01-16 | 2006-07-19 | 唐山国丰钢铁有限公司 | Method for making pellet by fine-grinded steel slag instead of bentonite |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6063306A (en) * | 1983-09-17 | 1985-04-11 | Nippon Steel Corp | Heating material for steel making |
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2010
- 2010-12-14 CN CN2010105871392A patent/CN102051473B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199100A (en) * | 1997-05-08 | 1998-11-18 | 王瑞安 | Pellet producing method using ferrous oxide steel slag |
| CN1804057A (en) * | 2006-01-16 | 2006-07-19 | 唐山国丰钢铁有限公司 | Method for making pellet by fine-grinded steel slag instead of bentonite |
Non-Patent Citations (1)
| Title |
|---|
| JP昭60-63306A 1985.04.11 |
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Inventor after: Sun Mingguang Inventor after: Zeng Xiancheng Inventor after: Tian Yuanyu Inventor after: Sun Mingliang Inventor after: Di Guiyuan Inventor after: Du Maofu Inventor after: Qiao Yingyun Inventor before: Sun Mingguang Inventor before: Zeng Xiancheng Inventor before: Tian Houyu Inventor before: Sun Mingliang Inventor before: Di Guiyuan Inventor before: Du Maofu Inventor before: Qiao Yingyun |
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Free format text: CORRECT: INVENTOR; FROM: SUN MINGGUANG CENG XIANCHENG TIAN HOUYU SUN MINGLIANG ZHAI GUIYUAN DU MAOFU QIAO YINGYUN TO: SUN MINGGUANG CENG XIANCHENG TIAN YUANYU SUN MINGLIANG ZHAI GUIYUAN DU MAOFU QIAO YINGYUN |
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Granted publication date: 20120704 Termination date: 20201214 |