CN106367554B - Iron and useful metal and the method for producing slag wool are extracted in a kind of secondary resource - Google Patents
Iron and useful metal and the method for producing slag wool are extracted in a kind of secondary resource Download PDFInfo
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- CN106367554B CN106367554B CN201610770443.8A CN201610770443A CN106367554B CN 106367554 B CN106367554 B CN 106367554B CN 201610770443 A CN201610770443 A CN 201610770443A CN 106367554 B CN106367554 B CN 106367554B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
- C21B13/105—Rotary hearth-type furnaces
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- 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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses iron and useful metal and the method for producing slag wool are extracted in a kind of secondary resource, iron-containing secondary resource is sent into rotary hearth furnace after broken, screening, briquetting, drying and carries out prereduction, hot delivery and hot charging divides electric furnace secondary reduction to once molten, and to reduzate slag sluicing system, from once melt divide stove pour out thermal slag to it is secondary it is molten hardening and tempering furnace is divided melt again point and quenched, then from once melting the qualified pig iron direct cast iron that stove is divided to pour out or be supplied to steel making working procedure；The secondary molten qualified slag that hardening and tempering furnace is divided to be formed hot sending produces qualified slag wool to fine slag wool machine is centrifuged into；It is underproof containing iron blast furnace slag stay after several stoves of slag it is hot topple over back once to melt stove is divided to continue molten point of reduction.The present invention is melted point using rotary hearth furnace prereduction, two steps and quenched, temperature control technique, synchronous while recycle useful metal, thermal slag is directly produced slag wool, metal recovery rate is high, and the slag wool quality produced is good, the realization seamless connection of process process equipment production capacity.
Description
Technical field
The present invention relates to iron content secondary resource field of comprehensive utilization, be related specifically to a kind of iron-holder it is relatively low, containing other
While iron, nickel, chromium are synchronously recycled in the secondary resource of useful metal, the method that produces slag wool.
Background technology
At present, the technique of production mineral wool or slag wool mainly utilizes basalt, coke, adjusting material etc. in furnace cupola both at home and abroad
Or melting is heated in electric furnace, slag is centrifuged into fibre, mineral wool system then is made using processes such as machine-shaping, curing and cuttings
Product.The shortcomings that apparent in this way is to utilize natural resources and coke, and energy consumption is relatively high.Secondary resource is utilized even if having
Experiment, furnace cupola technique do not lack coke yet, and high energy consumption issues also still remain.
Also have using secondary resource both at home and abroad, melted point as Bayer process red mud melts a point stove through rotary hearth furnace prereduction and heat accumulating type,
The technique that slag wool is made in slag.Since Bayer process red mud is higher containing sodium oxide molybdena, potassium oxide, molten point of reduction is again acid slag, is melted
Divide under the plyabilities vigorous erosion clinker high temperature such as acid slag, high basic metal slag, high oxidation ferrous iron in stove to furnace bottom, lining wear phase
When serious.At the same time, melting divides stove to have weak oxide atmosphere (tail gas oxygen content 8%~16%), causes TFe in slag>3.5%
(universal, TFe>5%), wherein containing the metallic iron more than 0.5%, slag wool quality is seriously affected.
Also there is the prereduction in rotary kiln using red mud both at home and abroad, hot-bulb is rolled into a ball and adds in electric furnace melting slag iron, slag is made
The patented technology of slag wool.Red mud iron content is low, SiO2、TiO2、Al2O3It waits impurity higher, is not easy to reduce.Especially Bayer process red mud
Alkali metal containing is high, and ring formation is more easy in rotary kiln, and reducing degree is subject to temperature limiting, because solid carbon direct-reduction is restricted
Link is temperature, so substantial amounts of ferrous oxide needs further reduce in electric furnace, increases furnace operation burden and difficulty, leads
It sends a telegraph clinker and is up to 3%~15% containing FeO, seriously affect slag wool quality.
The content of the invention
It is an object of the invention to be directed to deficiency of the prior art, provide and iron and useful gold are extracted in a kind of secondary resource
The method for belonging to and producing slag wool, to solve the above problems.
Following technical scheme may be employed to realize in technical problem solved by the invention：
Iron and useful metal and the method for producing slag wool are extracted in a kind of secondary resource, is comprised the following steps：
Step 1：Iron-containing secondary resource is crushed, is sieved, after preliminary drying dry-cure, classified storage adds in feed bin
Dispensing is mixed；
Step 2：Mixed secondary resource is formed into pelletizing or briquetting by agglomeration process；
Step 3：Ball block is sent into drying oven, and is dried using reuse rotary hearth furnace exhaust gas；
Step 4：The qualified ball of step 3 formation or block are sent into rotary hearth furnace, preheated, reduction generation qualification pre- going back
Original product；
Step 5：The hot charging of prereduction product is subjected to molten point of reduction to once melting to divide in stove, and slag is carried out to reduzate
Iron separates, and first stove is divided to pour out thermal slag molten hardening and tempering furnace is divided melt again point and quenched to secondary from once melting；Again from once
The molten qualified pig iron direct cast iron that stove is divided to pour out is supplied to steel making working procedure；
Step 6：The secondary molten qualified slag that hardening and tempering furnace is divided to be formed hot sending in step 5 is closed to fine slag wool machine production is centrifuged into
Lattice slag wool；It is underproof containing iron blast furnace slag it is secondary it is molten divide in hardening and tempering furnace stay after several stoves of slag it is hot topple over back once molten stove is divided to continue
Molten point of reduction.
Further, the secondary resource includes one in red mud, the tailing containing siderochrome, Stainless steelmaking dust, lateritic nickel ore
Kind is several；Dispensing includes one or more of binding agent, flux, reducing agent.
Further, it is described once to melt the function that stove is divided to have supplement reducing agent；Prereduction product is from turning bottom in step 5
Stove hot charging is to temperature >=700 DEG C once melted when dividing stove.
Further, secondary melt divides hardening and tempering furnace to have the function of to add adjusting material, temperature adjustment, control composition and temperature；
From the once molten slag temperature that stove is divided to be poured into the secondary thermal slag for melting and dividing hardening and tempering furnace in step 5>1250 DEG C, by once
It melts cast iron after the iron at least 90% that stove is divided to be reduced is separated or is supplied to steel making working procedure.
Further, in the step 6 it is underproof containing iron blast furnace slag it is secondary it is molten divide in hardening and tempering furnace stay 3~5 stove hypsokinesis of slag
Subcontracted in pouring into it is hot be transmitted back to once melt divide stove.
Further, qualified slag hot sending produces mineral wool fiber to high speed centrifugation into cotton machine in the step 6, qualified slag into
Enter high speed centrifugation into the high-temperature fusant temperature of cotton machine>1400 DEG C, into high speed centrifugation into the high-temperature fusant temperature fluctuation of cotton machine<50
DEG C, into high speed centrifugation into the high-temperature fusant quality fluctuation of cotton machine<10kg/min, into high speed centrifugation into the high-temperature fusant of cotton machine
Ingredient fluctuates<1%, wherein iron oxide content<1.5%.
Compared with prior art, beneficial effects of the present invention are as follows：
The present invention efficiently uses the secondary resource of ore deposit containing Fe compound type, and rotary hearth furnace is sent into after broken, screening, briquetting, drying
Prereduction is carried out, then hot delivery and hot charging divides electric furnace to carry out secondary reduction to once molten, recycles useful metal, tentatively completes slag, gold
After separation hot sending to it is secondary it is molten divide hardening and tempering furnace, further reduction, temperature adjustment, quenched, qualified slag melt enters high speed centrifugation into cotton
Mineral wool fiber is made in machine, obtains superior in quality slag wool product, residual metallic recycling.Whole process is through hot connection and gives up
Recuperation of heat utilizes technique, reduces production process energy consumption, realizes process energy consumption minimumization.Meanwhile it using secondary molten point and homogenizes
Technology makes the abundant Reduced separating of the useful elements ingredient such as iron, improves slag wool quality.Solves part Bayer process red mud comprehensive utilization
The problem of, recycle Stainless steelmaking dust or clinker and using thin tailing containing chromium, iron etc., it is energy saving and environmentally friendly.The present invention, which utilizes, turns bottom
Stove technology, two step of electric furnace melts point and quenched, temperature control technique, avoids compound resource prereduction technology bottleneck, it is synchronous recycle iron,
While nickel, chromium, thermal slag is directly produced to the technology field of slag wool, it is efficiently sharp to realize the secondary resources such as iron content, chromium, nickel
With metal recovery rate is high, and the slag wool quality produced is good.Meanwhile process process equipment matching is reasonable, it is seamless so as to fulfill production capacity
Linking.
Description of the drawings
Fig. 1 is to extract iron and useful metal in secondary resource of the present invention and produce the technological process of the method for slag wool
Figure.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, with reference to
Specific embodiment, the present invention is further explained.
Iron and useful metal and the method for producing slag wool, bag are extracted referring to Fig. 1, in a kind of secondary resource of the present invention
Include following steps：
Step 1：It is such as red by the iron-containing secondary resource of the useful metals such as TFe15%~45% and other iron, chromium, nickel
Mud, the tailing containing siderochrome, Stainless steelmaking dust, lateritic nickel ore etc., can not economically be applied in other conventional processes, through crushing,
Classified storage is in feed bin after the processes processing such as prebake (make reach screening requirement), screening, adds dispensing and by being pre-selected
Technique carry out dispensing, mixing.Dispensing includes one or more of binding agent, flux, reducing agent.
Step 2：Mixed secondary resource is formed into pelletizing or briquetting by agglomeration process, it is optional according to raw material physical property
Select the techniques such as pressure ball or disk pelletizing.
Step 3：The ball block for having made block is sent into drying oven, and is dried using reuse rotary hearth furnace exhaust gas.
Step 4：The qualified green-ball or block that step 3 is formed are wired to through distributing device in rotary hearth furnace, preheated, reduction generation
Qualified prereduction product.General reduction degree reaches more than 80%, is determined according to its economical operation condition.In rotary hearth furnace work
Its process waste heat is recycled during work.
Step 5：The hot charging of prereduction product is subjected to molten point of reduction to once melting to divide in stove, pair is also originated in after reducing fully
Object carries out slag sluicing system.First stove is divided to pour out thermal slag molten hardening and tempering furnace is divided melt again point and quenched to secondary from once melting；
Divide the qualified pig iron direct cast iron or be supplied to the next procedures such as steel-making that stove pours out from once melting again.
Step 6：By the secondary molten slag composition that hardening and tempering furnace is divided to be formed in step 5, temperature stabilization setting value qualification
Slag directly hot sending produces qualified slag wool to fine slag wool machine is centrifuged into.Qualified slag wool is into the slag temperature being centrifuged into fine slag wool machine
Degree fluctuation<50 DEG C, mass flow fluctuation<10kg/min, ingredient fluctuation<1%.Secondary molten a small amount of gold that hardening and tempering furnace lower part is divided to settle
Belong to and clinker, can be retained in it is secondary it is molten divide in hardening and tempering furnace, after 3~5 stove is retained, subcontract hot being transmitted back to one in being poured into
Secondary melt divides stove to continue molten point of reduction, makes a small amount of residual iron, is divided by melting again, reach and be sufficiently separated.Can according to reduction situation can
Adjust stove number.
Once melt the function that stove is divided to have supplement reducing agent；Prereduction product is from rotary hearth furnace hot charging to once melting in step 5
Divide temperature >=700 DEG C during stove, partial reduction agent can be supplemented as needed.
Secondary melt divides hardening and tempering furnace to have the function of to add adjusting material, temperature adjustment, control composition and temperature etc..From once in step 5
The molten slag temperature that stove is divided to be directly entered the secondary thermal slag for melting and dividing hardening and tempering furnace>1250℃.Once melt the reduzate for dividing stove
By first slagging tap, the rule that goes out metal afterwards topples over separation, wherein the metal being reduced at least 90% ingot casting or directly provides after being separated
To other process such as steel-making.
Qualified slag hot sending produces mineral wool fiber to high speed centrifugation into cotton machine in step 6, and qualified slag enters high speed centrifugation into cotton
The high-temperature fusant temperature of machine>1400 DEG C, into high speed centrifugation into the high-temperature fusant temperature fluctuation of cotton machine<50 DEG C, into high speed from
The heart is into the high-temperature fusant quality fluctuation of cotton machine<10kg/min is fluctuated into high speed centrifugation into the high-temperature fusant ingredient of cotton machine<1%,
Wherein iron oxide content<1.5%.
Specific embodiment one
Bayer process red mud (iron content 25%~32%), binding agent (bentonite, with dosage about 3%), flux (quick lime), also
Former agent (coal dust) etc., classified storage is in feed bin after the processes processing such as prebake, broken, screening, by the technique being pre-selected
Carry out dispensing, mixing.It subsequently into ball press technique, is dried after pressing ball using reuse rotary hearth furnace exhaust gas, qualified green-ball warp
Distributing device is wired in rotary hearth furnace, and the prereduction product preheated, multistage reduction generation is qualified, reduction degree reaches more than 85%.It will
Its hot charging (temperature >=750 DEG C) divides to once molten in stove, and supplements a small amount of reducing agent.Slag sluicing system after reduction fully, first topples over
Slag tap to it is secondary it is molten hardening and tempering furnace is divided melt again point and quenched, a small amount of residual Tie Tong is crossed to be melted point again, is reached and is sufficiently separated.It is qualified
(slag composition, temperature stabilization are in setting value, wherein FeO% for slag<1.5%) directly hot sending is qualified to fine slag wool machine production is centrifuged into
Slag wool is (into the slag temperature fluctuation being centrifuged into fine slag wool machine<50 DEG C, mass flow fluctuation<10kg/min, ingredient fluctuation<
1%) it is, a small amount of containing iron blast furnace slag 3~5 stove hypsokinesis of slag to be stayed to refund once to melt stove is divided to continue molten point.Once melting divides stove to pour out
Qualified pig iron direct cast iron or supply steel-making etc. next procedures, the rate of recovery of iron can reach more than 95%.
Specific embodiment two
Cr will be contained2O338%~50%, the mine tailing containing TFe 9%~20% (is not suitable for being directly used in traditional electric furnace
Ferrochrome smelting technique), binding agent (bentonite, with dosage about 4%), reducing agent (coke powder, about 7%) etc., through works such as broken, screenings
Classified storage carries out dispensing, mixing in feed bin by the technique being pre-selected after sequence processing.Subsequently into ball press technique, press
It is dried after ball using reuse rotary hearth furnace exhaust gas.Qualified green-ball is wired to through distributing device in rotary hearth furnace, preheated, multistage is also primary
Into qualified prereduction product, (chromium reduction degree reaches 50%, 80%) iron reduction degree reaches.Its hot charging (temperature >=750 DEG C) is arrived
It once melts and divides in stove, a small amount of reducing agent can be supplemented.Slag sluicing system after reduction fully, first topple over slag tap to it is secondary it is molten divide hardening and tempering furnace into
Row melts point and quenched again, and a small amount of residual Tie Tong is crossed to be melted point again, is reached and is sufficiently separated.(slag composition, temperature stabilization exist qualified slag
Setting value, wherein Cr2O3<0.5%th, FeO is 0.5%~1.5%) directly hot sending is to being centrifuged into fine slag wool machine production qualification slag wool
(the slag temperature fluctuation into centrifugation fiberizer<50 DEG C, mass flow fluctuation<10kg/min, ingredient fluctuation<1%), on a small quantity
Containing iron blast furnace slag 3~5 stove hypsokinesis of slag can be stayed to refund once to melt stove is divided to continue molten point.It once melts and divides the qualified pig iron that stove pours out
The next procedures such as direct cast iron or supply steel-making.
The basic principles, main features and the advantages of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (6)
1. iron and useful metal and the method for producing slag wool are extracted in a kind of secondary resource, it is characterised in that：Comprise the following steps：
Step 1：Iron-containing secondary resource is crushed, is sieved, after preliminary drying dry-cure, classified storage adds dispensing in feed bin
It is mixed；
Step 2：Mixed secondary resource is formed into pelletizing or briquetting by agglomeration process；
Step 3：Ball block is sent into drying oven, and is dried using reuse rotary hearth furnace exhaust gas；
Step 4：The qualified ball or block that step 3 is formed are sent into rotary hearth furnace, the prereduction production preheated, reduction generation is qualified
Product；
Step 5：The hot charging of prereduction product is subjected to molten point of reduction to once melting to divide in stove, and slag iron point is carried out to reduzate
From first stove being divided to pour out thermal slag molten hardening and tempering furnace is divided melt again point and quenched to secondary from once melting；Again from once molten point
The qualified pig iron direct cast iron or be supplied to steel making working procedure that stove pours out；
Step 6：The secondary molten qualified slag that hardening and tempering furnace is divided to be formed hot sending in step 5 is produced into qualified slag to fine slag wool machine is centrifuged into
Cotton；It is underproof containing iron blast furnace slag it is secondary it is molten divide in hardening and tempering furnace stay after several stoves of slag it is hot topple over back once to melt stove is divided to continue molten divide
Reduction.
2. iron and useful metal are extracted in secondary resource according to claim 1 and the method for producing slag wool, feature exist
In：The secondary resource includes one or more of red mud, the tailing containing siderochrome, Stainless steelmaking dust, lateritic nickel ore；Dispensing bag
Include one or more of binding agent, flux, reducing agent.
3. iron and useful metal are extracted in secondary resource according to claim 1 and the method for producing slag wool, feature exist
In：It is described once to melt the function that stove is divided to have supplement reducing agent；Prereduction product is from rotary hearth furnace hot charging to once melting in step 5
Divide temperature >=700 DEG C during stove.
4. iron and useful metal are extracted in secondary resource according to claim 1 and the method for producing slag wool, feature exist
In：Secondary melt divides hardening and tempering furnace to have the function of to add adjusting material, temperature adjustment, control composition and temperature；From once in step 5
The molten slag temperature that stove is divided to be poured into the secondary thermal slag for melting and dividing hardening and tempering furnace>1250 DEG C, divide what stove was reduced by once melting
Cast iron or steel making working procedure is supplied to after iron at least 90% is separated.
5. iron and useful metal are extracted in secondary resource according to claim 1 and the method for producing slag wool, feature exist
In：In the step 6 it is underproof containing iron blast furnace slag it is secondary it is molten divide in hardening and tempering furnace stay that be poured into transfer bag after 3~5 stove of slag hot
It is transmitted back to once to melt and divides stove.
6. iron and useful metal are extracted in secondary resource according to claim 1 and the method for producing slag wool, feature exist
In：Qualified slag hot sending produces mineral wool fiber to high speed centrifugation into cotton machine in the step 6, and qualified slag enters high speed centrifugation into cotton
The high-temperature fusant temperature of machine>1400 DEG C, into high speed centrifugation into the high-temperature fusant temperature fluctuation of cotton machine<50 DEG C, into high speed from
The heart is into the high-temperature fusant quality fluctuation of cotton machine<10kg/min is fluctuated into high speed centrifugation into the high-temperature fusant ingredient of cotton machine<1%,
Wherein iron oxide content<1.5%.
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| CN201610770443.8A CN106367554B (en) | 2016-08-30 | 2016-08-30 | Iron and useful metal and the method for producing slag wool are extracted in a kind of secondary resource |
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| CN201610770443.8A CN106367554B (en) | 2016-08-30 | 2016-08-30 | Iron and useful metal and the method for producing slag wool are extracted in a kind of secondary resource |
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| CN106367554B true CN106367554B (en) | 2018-05-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107354583B (en) * | 2017-07-10 | 2019-05-28 | 洛阳光正金属技术服务有限公司 | The high-valued comprehensive utilization process of dead catalyst slag |
| CN110172539A (en) * | 2019-06-19 | 2019-08-27 | 上海科麟沃环境科技有限公司 | Iron content red mud recovery method, rock wool preparation method and corresponding rock wool |
| CN111893308A (en) * | 2020-09-01 | 2020-11-06 | 中南大学 | Method for comprehensively utilizing red mud without tailings |
| CN114411042B (en) * | 2021-12-21 | 2022-11-15 | 东北大学 | Method for preparing high-nickel high-chromium iron alloy |
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| CN1052837A (en) * | 1989-12-25 | 1991-07-10 | 夏抒 | Directly be cut and produce the technology of mineral cotton with the molten state ore deposit |
| CN103627835A (en) * | 2013-11-12 | 2014-03-12 | 金川集团股份有限公司 | Method for treating nickel smelting furnace slag |
| CN104694758A (en) * | 2015-03-13 | 2015-06-10 | 宝钢发展有限公司 | Technique for comprehensively utilizing iron-containing dust mud |
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Effective date of registration: 20210119 Address after: 200441 room a006, 1st floor, building 1, 2816 Yixian Road, Baoshan District, Shanghai Patentee after: BAOWU GROUP ENVIRONMENT RESOURCE TECHNOLOGY Co.,Ltd. Address before: No. 889 Baoyang Road, Baoshan District, Shanghai, 20199 Patentee before: BAOSTEEL DEVELOPMENT Co.,Ltd. |