CN102534199A - Comprehensive utilization process of zinc-containing iron dust - Google Patents
Comprehensive utilization process of zinc-containing iron dust Download PDFInfo
- Publication number
- CN102534199A CN102534199A CN2012100149479A CN201210014947A CN102534199A CN 102534199 A CN102534199 A CN 102534199A CN 2012100149479 A CN2012100149479 A CN 2012100149479A CN 201210014947 A CN201210014947 A CN 201210014947A CN 102534199 A CN102534199 A CN 102534199A
- Authority
- CN
- China
- Prior art keywords
- iron
- zinc
- dust
- comprehensive utilization
- iron dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a comprehensive utilization process of zinc-containing iron dust. The process comprises the steps of: uniformly mixing iron-containing dust mud, iron-containing dust, carbon-containing sludge, pyrite residue, first reducing coal and an additive, and carrying out moist grinding, pelletizing and screening to obtain qualified raw pellets; and then uniformly mixing the raw pellets with second reducing coal, carrying out downdraught drying and reduction roasting on a pellet sinter roasting machine to finish sintering of metallized pellets, carrying out nitrogen cooling to room temperature, and discharging to obtain the metallized pellet sintered ore. According to the invention, the process method is simple and convenient for operation; aiming at the characteristics of the zinc-containing iron dust in steel mill, high-efficiency utilization of iron, zinc, carbon and other valuable elements is realized by pelletizing and metallized roasting, and at the same time, harmful elements are removed and secondary pollution is eliminated; at the same time of removing the harmful elements, the zinc-containing iron dust is prepared into metallized pellet sintered blocks, and iron has high grade and low content of zinc, sulfur and other harmful elements, and can be used as a high-quality raw material to be directly entered into a blast furnace for smelting, therefore, the comprehensive utilization process plays an effect of reducing coke and increasing yield on the blast furnace and has significant economic benefits.
Description
Technical field:
The invention discloses a kind of zinc-iron dust comprehensive utilization process that contains, belong to technical field of ferrous metallurgy.
Background technology
China is a big steel country, has reached since 100,000,000 tons from output of steel in 1996, occupies world's umber one always, output of steel in 2010 up to 6.28 hundred million tons about.The domestic fe source that supply to utilize reduces year by year, and the iron ore import volume constantly increases, and imported iron ore stone in 2010 is up to 6.3 hundred million tons, and the proportioning of present most of Iron And Steel Plant's imported iron ore stone in sinter mixture reaches more than 60%.The critical shortage of iron ore resource has begun to have influence on the Sustainable development and the safety of China's Iron And Steel Industry.
Contain the zinc-iron dust and be the accessory substance that produces in Iron And Steel Plant's ironmaking and the steelmaking process, main valuable elements such as iron content, carbon, in addition, harmful elements such as also leaded, zinc, arsenic.It is a kind of important iron-bearing material; For iron and steel enterprise, there is important recycling to be worth, causes the enrichment of harmful element in blast furnace again easily, influence the steady running of main production line but directly reclaim to use; Even cause a serious accident; Arsenic is unfavorable for smelting the high-quality steel grade behind the entering molten iron, thereby can't recycles these reclaimed materials owing in smelting process, is difficult to remove simultaneously.National steel ironworks more than 2,000 ten thousand tons of such dust of annual generation can't use, and pile up not only contaminate environment but also land occupation.Therefore no matter on still be the utilization of resources from environment protection, the recycling level that contains the zinc-iron dust of raising Iron And Steel Plant has important practical significance.
Contain aspect the zinc-iron dust in pyrogenic attack steel mill, comparatively sophisticated in the world technology has kiln process (Inmetco method) and rotary hearth furnace method etc., and production application is all arranged at home.
Kiln process is to utilize iron dust containing to make ball, utilizes the carbon and the additional reducing agent of iron dust containing itself, in rotary kiln, reduces; Make ferriferous oxide reduction, zinc separates with iron at the reductive entering flue gas that volatilizees simultaneously; Improve the iron grade of iron-containing product, reduced detrimental impurity content.But the iron-containing product that this method the obtains overwhelming majority can only be returned sintering plant for powder, after further sintering piece into, is used as blast furnace ironmaking raw material, Separation and Recovery zinc from flue gas.Because rotary kiln reductive raw material is the green-ball that iron dust containing is processed, intensity is low, poor heat stability and scaling loss amount are big, and pelletizing intensity in reduction process is poorer; Produce a large amount of dust; Cause ring formation of rotary kiln, iron-containing product also mainly is a powdery, can not directly be used for blast furnace ironmaking.The rotary hearth furnace method also is to utilize iron dust containing to make ball; Utilize the carbon of iron dust containing itself and add a certain amount of reductive agent to get in the green-ball, reducting pellet in rotary hearth furnace makes the ferriferous oxide reduction; Zinc is at the reductive entering flue gas that volatilizees simultaneously; Separate with iron, improved the iron grade of iron-containing product, reduce detrimental impurity content.But bed thickness only has the thickness (15-30mm) of 1-2 layer ball in rotary hearth furnace, and pelletizing directly is laid on the refractory materials; Be directly injected into pelletizing bed of material heating material by flame, heat transfer efficiency is low, bed of material reducing atmosphere is difficult to control, causes zinc reduction volatilization rate low; Product contains zinc higher (0.2%), and pelletizing is prone to be bonded on the rotary hearth furnace, causes the discharge difficulty; Influence operating rate, throughput is lower than 0.08t/m2.h.And above-mentioned two kinds of explained hereafter scales are less than normal, and the ability that unit year is handled iron dust containing is lower than 200,000 tons.
From the above, because Iron And Steel Plant's dust zinc, arsenic content are lower, the kiln process powder is many, and ring formation is severe, and energy consumption is high, yield poorly, production cost is high, and the material major part after the dezincify still is powdery, can only return sintering circuit, through getting into blast furnace behind the sintering for agglumeration.The zinc oxide content of its recovery has only 60% (amounting to metallic zinc content about 45%) approximately.Problems such as rotary hearth furnace worker method (Inmetco technology) also exists the product powder many, and degree of metalization is low cause production cost high, and the dezincify rate also has only 80%, product attach be worth low.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and provide a kind of process method simple, easy to operate, through make ball and the metallization roasting; Effective elimination contains detrimental impurity such as zinc, arsenic in the zinc-iron dust, and what the metallized pellet agglomerate of preparation can directly be used as blast furnace burden contains zinc-iron dust comprehensive utilization process.
A kind of zinc-iron dust comprehensive utilization process that contains of the present invention comprises the steps:
The first step: make ball
Ion dust mud contaning, iron dust containing, carbon containing mud, sulfate slag mixing and stirring with steel mill produces obtain first compound, then, mix with first additive going back raw coal and account for the first compound total mass 10%-20%, obtain second compound; The moisture (quality percentage composition) of controlling second compound is 6%-8%, grinds, makes ball, screening through profit again, obtains qualified green-ball; Said first goes back the ratio interpolation of the addition of raw coal according to the mass ratio C/Fe=0.1-0.5 of the iron in first compound and the first reduction carbon content in coal;
Second step: metallization sintering
Green-ball, second is gone back raw coal mix, be laid on the pellet sintering burning machine, bed thickness is 50-350mm, and the metallized pellet sintering is accomplished in, reducing roasting dry through exhausting, is cooled to room temperature through nitrogen, comes out of the stove, and obtains the metallized pellet agglomerate; Said second goes back the ratio interpolation of the addition of raw coal according to the mass ratio C/Fe=0.1-0.5 of the iron in the green-ball and the second reduction carbon content in coal.
The present invention is a kind of to be contained in the zinc-iron dust comprehensive utilization process, and described ion dust mud contaning is selected from least a in converter mud, the blast furnace gas mud;
The present invention is a kind of to be contained in the zinc-iron dust comprehensive utilization process, and described iron dust containing is the dry method iron dust containing that sintering, iron-smelting blast furnace produce; Said carbon containing mud is the carbon containing mud that the coke-oven plant produces.
The present invention is a kind of to be contained in the zinc-iron dust comprehensive utilization process, said additive by mass percentage, behind following component proportional mixing, fine grinding is formed smaller or equal to the 60-80% that 200 orders account for total mass to granularity:
Unslaked lime 20-25%, sodium-chlor 10-20%, magnesium chloride 10-15%, Losantin sodium 10-15%, coke powder 10-20%, coal dust 10-15%.
The present invention is a kind of to be contained in the zinc-iron dust comprehensive utilization process, and said exhausting is dry, the concrete processing parameter of reducing roasting is: bed thickness 50-350mm, 150 ℃-350 ℃ of exhausting drying temperatures, time of drying 3-7min, drying medium wind speed 0.8-1.2m/s-; 1050-1300 ℃ of reducing roasting temperature, sintering time are 25-45min, exhausting negative pressure 4-9kPa.
The present invention is a kind of to be contained in the zinc-iron dust comprehensive utilization process, and the required thermal source of said drying and reducing roasting is the hot waste gas after any or the burning of two kinds of mixed gases in blast furnace gas, the coke-oven gas.
The present invention is a kind of to be contained in the zinc-iron dust comprehensive utilization process, and the reducing roasting flue gas reclaims zinc oxide, plumbous oxide through dedusting and UTILIZATION OF VESIDUAL HEAT IN from flue dust.
The present invention fully combines the characteristics of iron ore pellets and agglomeration for iron mine owing to adopt above-mentioned process method, the proposition metallized pellet method of baking with agglomeration; Pellet roasting is combined with direct theory of reduction, utilize carbon and the mud of additional reducing agent bituminous coal or coke-oven plant in the iron dust containing, through raw materials pretreatment; Strengthen iron dust containing and make ball, utilize the BF gas heating pelletizing, hot waste gas directly sees through the pelletizing bed of material; Make green-ball on belt is baked with agglomeration machine, carry out drying, preheating and reducing roasting, make ferriferous oxide be reduced to metallic iron and produce sintering, form botryoidalis metallized pellet agglomerate; In high-temperature roasting volatilization dezincify, a one-step process will contain the zinc-iron powder and be prepared into high-grade metal pellet agglomerate, the content of the iron grade of raising blast furnace feeding raw material, reduction harmful element zinc, arsenic, lead etc.; Alleviate the predicament of China's iron-smelting raw material critical shortage, reduce the blast furnace ironmaking coke ratio, improve furnace processor; Reduce discharging, and reclaim the valuable element zinc in the iron dust containing.The zinc reduction volatilization gets into flue gas and recycles.Product is the metallized pellet agglomerate that intensity and granularity can satisfy the blast furnace requirement, can directly be used for blast furnace ironmaking, but reinforcing blast furnace ironmaking reduces coke consumption, improves pig iron output.Zinc content is lower than 0.15% in the product, and the dezincify rate is greater than 90%.Baking with agglomeration, bed thickness can reach 50-350mm on the machine, and reducing atmosphere and temperature are guaranteed easily in the bed of material, and unit output can reach 0.1-0.2t/m2.h.Because breeze seldom gets in the flue gas, can from flue gas, be recovered to highly purified secondary zinc oxide.
Particularly the present invention is owing to adopt the additive of said components proportioning, utilize different non-ferrous metal muriates as: PbCl2, ZnCl2, CuCl2 have lower melting point and high-volatile characteristics, under strong reducing property atmosphere, strengthen the reduction volatilization of zinc; Simultaneously, utilize the arsenic need be, add oxygenant, strengthen removing of arsenic like muriate, hypochlorite, permanganate in reduction volatilization under the weakly reducing atmosphere.The composite additive of the present invention's development; Be prepared from oxide compound, Oxidizing and Reducing Agents; In the compound batching, add; Through making ball, metallization reducing roasting, has the dezincify of raising arsenic-removing rate again, the dual function of the content of zinc, arsenic, reducing metal oxide, oxidized metal arsenic in the reduction product.In the compound of iron dust containing, sulfate slag and reductive agent, add the additive of 10-20%, be prepared into the green-ball of 5-16mm, green-ball carries out the reducing roasting dezincify in device is baked with agglomeration in the metallized pellet reduction.Compare with not doping, the dezincify rate improves 2-5%, contains zinc in the finished product metallized pellet agglomerate and is lower than 0.1%, and the dezincify rate is greater than 93%, and arsenic-removing rate improves 4-8%.The present invention adopts the reduction volatilization of zinc and arsenic in the reinforced by additive pelletizing reducing roasting process, can effectively improve the dezincify arsenic-removing rate, reduces the content of zinc, arsenic in the product, satisfies the high-quality steel and produces needs.Simultaneously, can use a large amount of inferior raw materials, enlarge raw material sources, reduce production costs, improve resource utilization.
The advantage and the positively effect of invention
1, technical process is simple, and technical indicator is advanced, iron content 40%-45%, the iron dust containing that contains zinc 1%-20% and pyrite dregs mixing material; Through the pre-treatment of profit mill; Through making ball and reduction is baked with agglomeration, produce the metallized pellet agglomerate of tap a blast furnace grade 60%-65%, degree of metalization 60-80% again, contain zinc and be lower than 0.15%; The dezincify rate is greater than 90%, arsenic-removing rate 55%-65%.
2, the machine unit output of baking with agglomeration is high, utilization coefficient 0.10-0.20t/m
2H; Resultant metal pellet sintered ore rotary drum strength 75-80%, yield rate 80%-85% is the high quality raw material of blast furnace ironmaking, can directly be used for blast furnace ironmaking.
The advantage of 3, this achievement is fully integrated belt pellet roasting machine and Dwight-Lloyd sintering machine organically combines sintering and directly reduces principle, and technology maturation is reliable, and vast market prospect is arranged.
In sum, process method of the present invention is simple, easy to operate, contain zinc-iron dust characteristics to steel mill, through making ball and metallization roasting, realizes the wherein efficient utilization of valuable elements such as iron, zinc, carbon, removes harmful element simultaneously, eliminates secondary pollution.When removing harmful element; To contain the zinc-iron dust and process the metallized pellet agglomerate, harmful element content such as iron is of high grade, zinc, sulphur are low, can be used as a kind of high quality raw material that can directly get into blast-furnace smelting; Can play the effect of falling burnt raising the output, remarkable in economical benefits to blast furnace.
Description of drawings
Accompanying drawing 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1:
A kind of zinc-iron dust comprehensive utilization process that contains comprises the steps:
The first step: make ball
The dedusting ash that contains zinc, iron and carbon, dirt mud with steel mill's generation; The sulfate slag mixing and stirring; Obtain first compound, then, according to the mass ratio of iron and charcoal in first compound; Add first by C/Fe=0.1 and go back raw coal and account for the additive of the first compound total mass 10%, obtain second compound; The moisture (quality percentage composition) of controlling second compound is 6%-8%, grinds, makes ball, screening through profit again, and obtaining diameter is the qualified green-ball of 5-16mm;
Second step: metallization sintering
Be that the agglomerate of 20-30mm is layered on the Dwight-Lloyd sintering machine earlier, then, go back raw coal and green-ball mixes second with granularity; Be laid in belt and bake with agglomeration on the agglomerate on the machine, bed thickness is 50mm,, reducing roasting dry through exhausting; Accomplish the metallized pellet sintering; Be cooled to room temperature through nitrogen, come out of the stove, obtain the metallized pellet agglomerate; Said second goes back the quality of the addition of raw coal according to iron in the green-ball, presses C/Fe=0.4 and adds; 150 ℃ of exhausting drying temperatures, time of drying 3min, about drying medium wind speed 0.8m/s; Bake with agglomeration 1300 ℃ of temperature of metallization, sintering time is 25min, exhausting negative pressure 4kPa, after sintering finished, with the sintered product cool to room temperature, broken, screening was returned batching less than the 5mm grade with nitrogen, and 5-30mm is the finished product agglomerate.Product barrate strength 75%, yield rate 81%, utilization coefficient 0.10t/m
2H, dezincify rate 90.4%, arsenic-removing rate 65%, product iron grade 60.1%, ferrous metal rate 60.2% contains zinc 0.135%.
Embodiment 2:
A kind of zinc-iron dust comprehensive utilization process that contains comprises the steps:
The first step: make ball
The dedusting ash that contains zinc, iron and carbon, dirt mud with steel mill's generation; The sulfate slag mixing and stirring; Obtain first compound, then, according to the mass ratio of iron and charcoal in first compound; Add first by C/Fe=0.25 and go back raw coal and account for the additive of the first compound total mass 10%, obtain second compound; The moisture (quality percentage composition) of controlling second compound is 6%-8%, grinds, makes ball, screening through profit again, and obtaining diameter is the qualified green-ball of 5-16mm;
Second step: metallization sintering
Be that the agglomerate of 20-30mm is layered on the Dwight-Lloyd sintering machine earlier, then, go back raw coal and green-ball mixes second with granularity; Be laid in belt and bake with agglomeration on the agglomerate on the machine, bed thickness is 150mm,, reducing roasting dry through exhausting; Accomplish the metallized pellet sintering; Be cooled to room temperature through nitrogen, come out of the stove, obtain the metallized pellet agglomerate; Said second goes back the quality of the addition of raw coal according to iron in the green-ball, presses C/Fe=0.25 and adds; 200 ℃ of exhausting drying temperatures, time of drying 4min, about drying medium wind speed 0.8m/s; Bake with agglomeration 1150 ℃ of temperature of metallization, exhausting negative pressure 7kPa, sintering 30min.Sintering carries out cool to room temperature with nitrogen after finishing, and product is carried out fragmentation, screening, returns batching less than the 5mm grade, and 5-30mm is the finished product agglomerate.Product barrate strength 76.4%, yield rate be up to 81%, utilization coefficient 0.12t/m
2H, dezincify rate 91.9%, arsenic-removing rate 63.8%, product iron grade 60.5%, ferrous metal rate 65.3% contains zinc 0.132%.
Embodiment 3:
A kind of zinc-iron dust comprehensive utilization process that contains comprises the steps:
The first step: make ball
The dedusting ash that contains zinc, iron and carbon, dirt mud with steel mill's generation; The sulfate slag mixing and stirring; Obtain first compound, then, according to the mass ratio of iron and charcoal in first compound; Add first by C/Fe=0.30 and go back raw coal and account for the additive of the first compound total mass 10%, obtain second compound; The moisture (quality percentage composition) of controlling second compound is 6%-8%, grinds, makes ball, screening through profit again, and obtaining diameter is the qualified green-ball of 5-16mm;
Second step: metallization sintering
Be that the agglomerate of 20-30mm is layered on the Dwight-Lloyd sintering machine earlier, then, go back raw coal and green-ball mixes second with granularity; Be laid in belt and bake with agglomeration on the agglomerate on the machine, bed thickness is 200mm,, reducing roasting dry through exhausting; Accomplish the metallized pellet sintering; Be cooled to room temperature through nitrogen, come out of the stove, obtain the metallized pellet agglomerate; Said second goes back the quality of the addition of raw coal according to iron in the green-ball, presses C/Fe=0.20 and adds; 350 ℃ of exhausting drying temperatures, time of drying 7min, about drying medium wind speed 0.8m/s; Bake with agglomeration 1100 ℃ of temperature of metallization, exhausting negative pressure 6kPa, sintering time 35min.Sintering carries out cool to room temperature with nitrogen after finishing, and product is carried out fragmentation, screening, returns batching less than the 5mm grade, and 5-30mm is the finished product agglomerate.Product barrate strength 76.8%, yield rate be up to 84.5%, utilization coefficient 0.19t/m
2H, dezincify rate 93.2%, arsenic-removing rate 60.3%, product iron grade 62.3%, ferrous metal rate 79.7% contains zinc 0.121%.
Embodiment 4:
A kind of zinc-iron dust comprehensive utilization process that contains comprises the steps:
The first step: make ball
The dedusting ash that contains zinc, iron and carbon, dirt mud with steel mill's generation; The sulfate slag mixing and stirring; Obtain first compound, then, according to the mass ratio of iron and charcoal in first compound; Add first by C/Fe=0.4 and go back raw coal and account for the additive of the first compound total mass 10%, obtain second compound; The moisture (quality percentage composition) of controlling second compound is 6%-8%, grinds, makes ball, screening through profit again, and obtaining diameter is the qualified green-ball of 5-16mm;
Second step: metallization sintering
Be that the agglomerate of 20-30mm is layered on the Dwight-Lloyd sintering machine earlier, then, go back raw coal and green-ball mixes second with granularity; Be laid in belt and bake with agglomeration on the agglomerate on the machine, bed thickness is 200mm,, reducing roasting dry through exhausting; Accomplish the metallized pellet sintering; Be cooled to room temperature through nitrogen, come out of the stove, obtain the metallized pellet sintering.Said second goes back the quality of the addition of raw coal according to iron in the green-ball, presses C/Fe=0.10 and adds; 150 ℃ of exhausting drying temperatures, time of drying 7min, about drying medium wind speed 1.2m/s; Bake with agglomeration 1100 ℃ of temperature of metallization, exhausting negative pressure 9kPa.Sintering time 35min.Sintering carries out cool to room temperature with nitrogen after finishing, and product is carried out fragmentation, screening, returns batching less than the 5mm grade, and 5-30mm is the finished product agglomerate.Product barrate strength 79.5%, yield rate be up to 84.6%, utilization coefficient 0.13t/m
2H, dezincify rate 90.8%, arsenic-removing rate 65.0%, ferrous metal rate 60.5%.
Embodiment 5:
A kind of zinc-iron dust comprehensive utilization process that contains comprises the steps:
The first step: make ball
The dedusting ash that contains zinc, iron and carbon, dirt mud with steel mill's generation; The sulfate slag mixing and stirring; Obtain first compound, then, according to the mass ratio of iron and charcoal in first compound; Add first by C/Fe=0.1 and go back raw coal and account for the additive of the first compound total mass 10%, obtain second compound; The moisture (quality percentage composition) of controlling second compound is 6%-8%, grinds, makes ball, screening through profit again, and obtaining diameter is the qualified green-ball of 5-16mm;
Second step: metallization sintering
Be that the agglomerate of 20-30mm is layered on the Dwight-Lloyd sintering machine earlier, then, go back raw coal and green-ball mixes second with granularity; Be laid in belt and bake with agglomeration on the agglomerate on the machine, bed thickness is 200mm,, reducing roasting dry through exhausting; Accomplish the metallized pellet sintering; Be cooled to room temperature through nitrogen, come out of the stove, obtain the metallized pellet sintering.Said second goes back the quality of the addition of raw coal according to iron in the green-ball, presses C/Fe=0.50 and adds; 200 ℃ of exhausting drying temperatures, time of drying 4min, about drying medium wind speed 1.2m/s; Bake with agglomeration 1100 ℃ of temperature of metallization, exhausting negative pressure 6kPa.Sintering time 45min.Sintering carries out cool to room temperature with nitrogen after finishing, and product is carried out fragmentation, screening, returns batching less than the 5mm grade, and 5-30mm is the finished product agglomerate.Product barrate strength 84.3%, yield rate be up to 81%, utilization coefficient 0.19t/m
2H, dezincify rate 91.9%, arsenic-removing rate 65.2%, ferrous metal rate 80.0%.
Embodiment 6:
A kind of zinc-iron dust comprehensive utilization process that contains comprises the steps:
The first step: make ball
The dedusting ash that contains zinc, iron and carbon, dirt mud with steel mill's generation; The sulfate slag mixing and stirring; Obtain first compound, then, according to the mass ratio of iron and charcoal in first compound; Add first by C/Fe=0.2 and go back raw coal and account for the additive of the first compound total mass 10%, obtain second compound; The moisture (quality percentage composition) of controlling second compound is 6%-8%, grinds, makes ball, screening through profit again, and obtaining diameter is the qualified green-ball of 5-16mm;
Second step: metallization sintering
Be that the agglomerate of 20-30mm is layered on the Dwight-Lloyd sintering machine earlier, then, go back raw coal and green-ball mixes second with granularity; Be laid in belt and bake with agglomeration on the agglomerate on the machine, bed thickness is 350mm,, reducing roasting dry through exhausting; Accomplish the metallized pellet sintering; Be cooled to room temperature through nitrogen, come out of the stove, obtain the metallized pellet sintering.Said second goes back the quality of the addition of raw coal according to iron in the green-ball, presses C/Fe=0.30 and adds; 250 ℃ of exhausting drying temperatures, time of drying 7min, about drying medium wind speed 0.8m/s; Bake with agglomeration 1200 ℃ of temperature of metallization, exhausting negative pressure 9kPa, sintering time 45min.Sintering carries out cool to room temperature with nitrogen after finishing, and product is carried out fragmentation, screening, returns batching less than the 5mm grade, and 5-30mm is the finished product agglomerate.Product barrate strength 77.4%, yield rate be up to 85.2%, utilization coefficient 0.21t/m
2H, dezincify rate 93.3%, arsenic-removing rate 65.0%, ferrous metal rate 80.0%.
Embodiment 7
A kind of zinc-iron dust comprehensive utilization process that contains comprises the steps:
The first step: make ball
The dedusting ash that contains zinc, iron and carbon, dirt mud with steel mill's generation; The sulfate slag mixing and stirring; Obtain first compound, then, according to the mass ratio of iron and charcoal in first compound; Add first by C/Fe=0.2 and go back raw coal and account for the additive of the first compound total mass 10%, obtain second compound; The moisture (quality percentage composition) of controlling second compound is 6%-8%, grinds, makes ball, screening through profit again, and obtaining diameter is the qualified green-ball of 5-16mm;
Second step: metallization sintering
Be that the agglomerate of 20-30mm is layered on the Dwight-Lloyd sintering machine earlier, then, go back raw coal and green-ball mixes second with granularity; Be laid in belt and bake with agglomeration on the agglomerate on the machine, bed thickness is 200mm,, reducing roasting dry through exhausting; Accomplish the metallized pellet sintering; Be cooled to room temperature through nitrogen, come out of the stove, obtain the metallized pellet sintering.Said second goes back the quality of the addition of raw coal according to iron in the green-ball, presses C/Fe=0.30 and adds; 250 ℃ of exhausting drying temperatures, time of drying 7min, about drying medium wind speed 0.8m/s; Bake with agglomeration 1050 ℃ of temperature of metallization, exhausting negative pressure 9kPa, sintering time 45min.Sintering carries out cool to room temperature with nitrogen after finishing, and product is carried out fragmentation, screening, returns batching less than the 5mm grade, and 5-30mm is the finished product agglomerate.Product barrate strength 76.1%, yield rate be up to 84.3%, utilization coefficient 0.20t/m
2H, dezincify rate 92.5%, arsenic-removing rate 64.1%, ferrous metal rate 79.0%.
Claims (7)
1. one kind contains zinc-iron dust comprehensive utilization process, comprises the steps:
The first step: make ball
Ion dust mud contaning, iron dust containing, carbon containing mud, sulfate slag mixing and stirring with steel mill produces obtain first compound, then, mix with first additive going back raw coal and account for the first compound total mass 10%-20%, obtain second compound; The moisture (quality percentage composition) of controlling second compound is 6%-8%, grinds, makes ball, screening through profit again, obtains qualified green-ball; Said first goes back the ratio interpolation of the addition of raw coal according to the mass ratio C/Fe=0.1-0.5 of the iron in first compound and the first reduction carbon content in coal;
Second step: metallization sintering
Green-ball, second is gone back raw coal mix, be laid on the pellet sintering burning machine, bed thickness is 50-350mm, and the metallized pellet sintering is accomplished in, reducing roasting dry through exhausting, is cooled to room temperature through nitrogen, comes out of the stove, and obtains the metallized pellet agglomerate; Said second goes back the ratio interpolation of the addition of raw coal according to the mass ratio C/Fe=0.1-0.5 of the iron in the green-ball and the second reduction carbon content in coal.
2. a kind of zinc-iron dust comprehensive utilization process that contains according to claim 1 is characterized in that: described ion dust mud contaning is selected from least a in converter mud, the blast furnace gas mud.
3. a kind of zinc-iron dust comprehensive utilization process that contains according to claim 2 is characterized in that: described iron dust containing is the dry method iron dust containing that sintering, iron-smelting blast furnace produce; Said carbon containing mud is the carbon containing mud that the coke-oven plant produces.
4. a kind of zinc-iron dust comprehensive utilization process that contains according to claim 3; It is characterized in that: said exhausting is dry, the concrete processing parameter of reducing roasting is: bed thickness 50-350mm; 150 ℃-350 ℃ of exhausting drying temperatures; Time of drying 3-7min, drying medium wind speed 0.8-1.2m/s; 1050-1300 ℃ of reducing roasting temperature, sintering time are 25-45min, exhausting negative pressure 4-9kPa.
5. a kind of zinc-iron dust comprehensive utilization process that contains according to claim 4 is characterized in that: said additive by mass percentage, behind following component proportional mixing, fine grinding is formed smaller or equal to the 60-80% that 200 orders account for total mass to granularity:
Unslaked lime 20-25%, sodium-chlor 10-20%, magnesium chloride 10-15%, Losantin sodium 10-15%, coke powder 10-20%, coal dust 10-15%.
6. a kind of zinc-iron dust comprehensive utilization process that contains according to claim 5 is characterized in that: the required thermal source of said drying and reducing roasting is the hot waste gas after any or the burning of two kinds of mixed gases in blast furnace gas, the coke-oven gas.
7. according to any described a kind of zinc-iron dust comprehensive utilization process that contains of claim 1-6, it is characterized in that: the reducing roasting flue gas reclaims zinc oxide, plumbous oxide through dedusting and UTILIZATION OF VESIDUAL HEAT IN from flue dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100149479A CN102534199B (en) | 2012-01-18 | 2012-01-18 | Comprehensive utilization process of zinc-containing iron dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100149479A CN102534199B (en) | 2012-01-18 | 2012-01-18 | Comprehensive utilization process of zinc-containing iron dust |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102534199A true CN102534199A (en) | 2012-07-04 |
| CN102534199B CN102534199B (en) | 2013-08-07 |
Family
ID=46342218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100149479A Active CN102534199B (en) | 2012-01-18 | 2012-01-18 | Comprehensive utilization process of zinc-containing iron dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102534199B (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215437A (en) * | 2013-03-18 | 2013-07-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for producing beaded iron by using nickel slag, blast furnace gas ash and steel OG mud |
| CN103977956A (en) * | 2014-04-29 | 2014-08-13 | 首钢总公司 | Device and method for separating harmful elements such as alkali and zinc elements in dry dedusting ash of blast furnace |
| CN104402097A (en) * | 2014-10-31 | 2015-03-11 | 武汉钢铁(集团)公司 | Blast furnace dust recycling utilization method |
| CN105063254A (en) * | 2015-07-16 | 2015-11-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, zinc and carbon in blast furnace sludge |
| CN105483371A (en) * | 2015-12-21 | 2016-04-13 | 武钢集团昆明钢铁股份有限公司 | Method for comprehensively recycling lead and zinc containing blast furnace dust |
| CN106006716A (en) * | 2016-07-01 | 2016-10-12 | 赫章县金川锌业有限公司 | Method for producing direct-method zinc oxide by utilizing belt type roasting machine |
| CN106119531A (en) * | 2016-08-01 | 2016-11-16 | 江苏省冶金设计院有限公司 | Comprehensive utilization Zinc volatilization kiln slag and the method and system of red mud |
| CN106755981A (en) * | 2016-11-25 | 2017-05-31 | 江苏省沙钢钢铁研究院有限公司 | Method for producing metallized pellets by using iron ore tailings |
| CN107083461A (en) * | 2012-12-07 | 2017-08-22 | 新日铁住金工程技术株式会社 | The operating method of blast furnace and the manufacture method of molten iron |
| CN108411105A (en) * | 2018-04-25 | 2018-08-17 | 重庆赛迪热工环保工程技术有限公司 | A kind of method of multisystem cooperative disposal ion dust mud contaning |
| CN109207739A (en) * | 2018-09-17 | 2019-01-15 | 中南大学 | A kind of method of resource utilization zinc-containing metallurgy dust production iron-smelting furnace charge |
| CN109365490A (en) * | 2018-12-07 | 2019-02-22 | 中南大学 | A method of utilizing metallurgy and municipal solid waste preparation sintering NOx inhibitor |
| CN110295282A (en) * | 2019-07-24 | 2019-10-01 | 深圳市中金岭南有色金属股份有限公司 | A kind of blast furnace returning charge briquetting technique |
| CN110938741A (en) * | 2019-12-18 | 2020-03-31 | 新疆和钢新能科技股份有限公司 | Method for effectively removing harmful elements of lead and zinc in hematite |
| WO2020172050A1 (en) * | 2019-02-19 | 2020-08-27 | Texas Instruments Incorporated | Methods and apparatus to improve performance while reading a one-time-programmable memory |
| CN111996024A (en) * | 2020-08-05 | 2020-11-27 | 北京科技大学 | Method for preparing high-reactivity coke by compounding metallurgical dust and high-sulfur coal and cooperatively removing zinc and sulfur |
| CN113025813A (en) * | 2021-02-26 | 2021-06-25 | 西安建筑科技大学 | Method for treating zinc-containing carbon-containing industrial solid waste in steel production process |
| CN113637852A (en) * | 2021-08-12 | 2021-11-12 | 张逸璁 | Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant |
| CN114395697A (en) * | 2022-01-04 | 2022-04-26 | 中冶南方工程技术有限公司 | Method for reducing carbon emission in reduction dezincification process |
| CN114574692A (en) * | 2022-02-23 | 2022-06-03 | 中南大学 | Preparation method of carbon-containing micro-electrolysis material |
| CN115491514A (en) * | 2022-08-29 | 2022-12-20 | 浙江源程冶金科技发展有限公司 | Method for separating metal zinc from metallurgical powder |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089813A (en) * | 2001-09-14 | 2003-03-28 | Nippon Steel Corp | Method for reduction of iron oxide |
| CN1470657A (en) * | 2002-07-25 | 2004-01-28 | 宝钢集团上海梅山有限公司 | Steel making and iron making superlow zine dust recovery and treatment process |
| CN1509339A (en) * | 2001-12-21 | 2004-06-30 | Posco公司 | Apparatus and method for recycling iron laden dust and sludge in ingot iron manufacturing process using semi-soft coking coal and fine iron ore |
| JP2005097665A (en) * | 2003-09-24 | 2005-04-14 | Kobe Steel Ltd | Reduced metal raw material agglomerate and its producing method, and method for producing reduced metal |
| JP2007039747A (en) * | 2005-08-03 | 2007-02-15 | Nippon Steel Corp | Blast furnace operating method |
| CN101818263A (en) * | 2009-02-27 | 2010-09-01 | 鞍钢股份有限公司 | Recovery processing method of zinc-containing and iron-containing dust and mud |
| CN101875986A (en) * | 2009-11-27 | 2010-11-03 | 北京科技大学 | Method for treating iron-containing dusts in steel plant by using melting gasification furnace |
-
2012
- 2012-01-18 CN CN2012100149479A patent/CN102534199B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089813A (en) * | 2001-09-14 | 2003-03-28 | Nippon Steel Corp | Method for reduction of iron oxide |
| CN1509339A (en) * | 2001-12-21 | 2004-06-30 | Posco公司 | Apparatus and method for recycling iron laden dust and sludge in ingot iron manufacturing process using semi-soft coking coal and fine iron ore |
| CN1470657A (en) * | 2002-07-25 | 2004-01-28 | 宝钢集团上海梅山有限公司 | Steel making and iron making superlow zine dust recovery and treatment process |
| JP2005097665A (en) * | 2003-09-24 | 2005-04-14 | Kobe Steel Ltd | Reduced metal raw material agglomerate and its producing method, and method for producing reduced metal |
| JP2007039747A (en) * | 2005-08-03 | 2007-02-15 | Nippon Steel Corp | Blast furnace operating method |
| CN101818263A (en) * | 2009-02-27 | 2010-09-01 | 鞍钢股份有限公司 | Recovery processing method of zinc-containing and iron-containing dust and mud |
| CN101875986A (en) * | 2009-11-27 | 2010-11-03 | 北京科技大学 | Method for treating iron-containing dusts in steel plant by using melting gasification furnace |
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083461B (en) * | 2012-12-07 | 2019-05-10 | 新日铁住金工程技术株式会社 | The operating method of blast furnace and the manufacturing method of molten iron |
| CN107083461A (en) * | 2012-12-07 | 2017-08-22 | 新日铁住金工程技术株式会社 | The operating method of blast furnace and the manufacture method of molten iron |
| CN103215437A (en) * | 2013-03-18 | 2013-07-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for producing beaded iron by using nickel slag, blast furnace gas ash and steel OG mud |
| CN103977956A (en) * | 2014-04-29 | 2014-08-13 | 首钢总公司 | Device and method for separating harmful elements such as alkali and zinc elements in dry dedusting ash of blast furnace |
| CN103977956B (en) * | 2014-04-29 | 2016-06-29 | 首钢总公司 | A kind of separate the apparatus and method of the harmful element such as alkali zinc in blast furnace dry method dust ash |
| CN104402097A (en) * | 2014-10-31 | 2015-03-11 | 武汉钢铁(集团)公司 | Blast furnace dust recycling utilization method |
| CN104402097B (en) * | 2014-10-31 | 2016-05-04 | 武汉钢铁(集团)公司 | A kind of resource utilization method of blast furnace dedusting ash |
| CN105063254A (en) * | 2015-07-16 | 2015-11-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, zinc and carbon in blast furnace sludge |
| CN105063254B (en) * | 2015-07-16 | 2017-05-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, zinc and carbon in blast furnace sludge |
| CN105483371B (en) * | 2015-12-21 | 2017-11-17 | 武钢集团昆明钢铁股份有限公司 | A kind of method of the leaded zinc powder dirt of comprehensive reutilization blast furnace |
| CN105483371A (en) * | 2015-12-21 | 2016-04-13 | 武钢集团昆明钢铁股份有限公司 | Method for comprehensively recycling lead and zinc containing blast furnace dust |
| CN106006716A (en) * | 2016-07-01 | 2016-10-12 | 赫章县金川锌业有限公司 | Method for producing direct-method zinc oxide by utilizing belt type roasting machine |
| CN106119531A (en) * | 2016-08-01 | 2016-11-16 | 江苏省冶金设计院有限公司 | Comprehensive utilization Zinc volatilization kiln slag and the method and system of red mud |
| CN106755981A (en) * | 2016-11-25 | 2017-05-31 | 江苏省沙钢钢铁研究院有限公司 | Method for producing metallized pellets by using iron ore tailings |
| CN106755981B (en) * | 2016-11-25 | 2019-07-19 | 江苏省沙钢钢铁研究院有限公司 | Method for producing metallized pellets by using iron ore tailings |
| CN108411105B (en) * | 2018-04-25 | 2019-11-19 | 重庆赛迪热工环保工程技术有限公司 | A kind of method of multisystem cooperative disposal ion dust mud contaning |
| CN108411105A (en) * | 2018-04-25 | 2018-08-17 | 重庆赛迪热工环保工程技术有限公司 | A kind of method of multisystem cooperative disposal ion dust mud contaning |
| CN109207739A (en) * | 2018-09-17 | 2019-01-15 | 中南大学 | A kind of method of resource utilization zinc-containing metallurgy dust production iron-smelting furnace charge |
| CN109207739B (en) * | 2018-09-17 | 2019-12-24 | 中南大学 | Method for producing iron-making furnace burden by resource utilization of zinc-containing metallurgical dust |
| CN109365490A (en) * | 2018-12-07 | 2019-02-22 | 中南大学 | A method of utilizing metallurgy and municipal solid waste preparation sintering NOx inhibitor |
| CN109365490B (en) * | 2018-12-07 | 2020-08-25 | 中南大学 | Method for preparing sintering NOx inhibitor by utilizing metallurgy and municipal solid wastes |
| US11170864B2 (en) | 2019-02-19 | 2021-11-09 | Texas Instruments Incorporated | Methods and apparatus to improve performance while reading a one-time-programmable memory |
| WO2020172050A1 (en) * | 2019-02-19 | 2020-08-27 | Texas Instruments Incorporated | Methods and apparatus to improve performance while reading a one-time-programmable memory |
| CN110295282A (en) * | 2019-07-24 | 2019-10-01 | 深圳市中金岭南有色金属股份有限公司 | A kind of blast furnace returning charge briquetting technique |
| CN110938741A (en) * | 2019-12-18 | 2020-03-31 | 新疆和钢新能科技股份有限公司 | Method for effectively removing harmful elements of lead and zinc in hematite |
| CN111996024A (en) * | 2020-08-05 | 2020-11-27 | 北京科技大学 | Method for preparing high-reactivity coke by compounding metallurgical dust and high-sulfur coal and cooperatively removing zinc and sulfur |
| CN111996024B (en) * | 2020-08-05 | 2021-11-30 | 北京科技大学 | Method for preparing high-reactivity coke by compounding metallurgical dust and high-sulfur coal and cooperatively removing zinc and sulfur |
| CN113025813A (en) * | 2021-02-26 | 2021-06-25 | 西安建筑科技大学 | Method for treating zinc-containing carbon-containing industrial solid waste in steel production process |
| CN113637852A (en) * | 2021-08-12 | 2021-11-12 | 张逸璁 | Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant |
| CN114395697A (en) * | 2022-01-04 | 2022-04-26 | 中冶南方工程技术有限公司 | Method for reducing carbon emission in reduction dezincification process |
| CN114574692A (en) * | 2022-02-23 | 2022-06-03 | 中南大学 | Preparation method of carbon-containing micro-electrolysis material |
| CN115491514A (en) * | 2022-08-29 | 2022-12-20 | 浙江源程冶金科技发展有限公司 | Method for separating metal zinc from metallurgical powder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102534199B (en) | 2013-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102534199B (en) | Comprehensive utilization process of zinc-containing iron dust | |
| CN103468961B (en) | A kind of airtight cupola furnace process Steel Plant are containing zinc, lead powder dirt processing method | |
| CN103614562B (en) | A kind of melting furnace process Steel Plant solid waste processing method | |
| CN104911356B (en) | A kind of solid waste gas ash, the comprehensive recycling process of vanadium slag containing zinc-iron | |
| CN101386913B (en) | Method for recovering zinc oxide in Zn-containing dust treatment by rotary hearth furnace | |
| CN102634621A (en) | Device and method for treating refractory iron ore | |
| CN109207739B (en) | Method for producing iron-making furnace burden by resource utilization of zinc-containing metallurgical dust | |
| KR101304686B1 (en) | Part reduced iron for blast furnace and method thereof | |
| CN102031361B (en) | Comprehensive treatment and utilization method of iron and steel dust and mud | |
| CN106893867A (en) | A kind of method that muffle shaft furnace treatment feed powder containing zinc-iron dirt reclaims zinc | |
| CN103468848B (en) | Method for treating high-iron red mud by high-temperature iron bath | |
| CN111647753B (en) | Method for recovering zinc by direct reduction of melting gasification furnace | |
| CN104073649A (en) | Iron-containing zinc powder recycling process | |
| CN103320607A (en) | Cold curing ball and preparation method thereof | |
| CN106480310A (en) | Method for removing alkali metal from metallurgical dust and mud | |
| CN102719575B (en) | Converter steel slag modifier and manufacturing and using methods thereof | |
| CN112981027A (en) | Direct smelting process device for iron-containing zinc-containing solid waste in iron and steel plant | |
| CN107488784B (en) | A kind of blast furnace ironmaking superfluxed pellets and its production method | |
| CN107779534B (en) | Process for treating zinc-containing and iron dust and mud in iron and steel plant by shaft furnace method | |
| CN103952540B (en) | Ion dust mud contaning and high silicon iron concentrate is utilized to produce the technique of prereduced burden | |
| CN102634614A (en) | Recycling treatment method for zinc-containing ironmaking and steelmaking intermediate slag | |
| CN102839281A (en) | Method of producing titanium-bearing metallic pellets used for protecting blast furnace with rotary hearth furnace through direct reduction | |
| CN102268502B (en) | Spongy iron preparation method by smelting refractory iron ore (slag) with reduction rotary kiln | |
| CN102560085A (en) | Additive for reinforcing zinc removal of dust containing zinc and iron by metallized pellet sintering roasting | |
| CN103805729B (en) | A kind of method adopting rotary hearth furnace to produce low-sulfur conversion pig |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |