CN107881399A - A kind of system and method for producing high phosphorus weathering steel - Google Patents
A kind of system and method for producing high phosphorus weathering steel Download PDFInfo
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- CN107881399A CN107881399A CN201711400809.3A CN201711400809A CN107881399A CN 107881399 A CN107881399 A CN 107881399A CN 201711400809 A CN201711400809 A CN 201711400809A CN 107881399 A CN107881399 A CN 107881399A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a kind of system and method for producing high phosphorus weathering steel, the system includes proportioner, the first shaped device, the second shaped device, reduction roasting device, screening plant, molten separating device, purifier and into blanking device.The present invention is using the raw material of cheap copper tailings and high phosphorus ore as production weathering steel, realize the recycling of copper in copper tailings and ferro element, P elements in high phosphorus ore, copper tailings belongs to the solid waste of coloured industry, the mineral of the high difficult processing of phosphorus ore, the present invention turns waste into wealth, economized on resources, reduce environmental pollution, there is considerable economic benefit；The present invention, to copper tailings pelletizing and high phosphorus ore pelletizing reduction roasting, can be realized long-term large-scale production, improve production efficiency using rotary hearth furnace.The present invention greatly reduces the production cost of weathering steel without undergoing the processes such as sintering, blast furnace, converter.
Description
Technical field
The present invention relates to field of iron and steel, and in particular to a kind of system and method for producing high phosphorus weathering steel.
Background technology
The substantial amounts of copper ashes of pyrogenic process process output of copper, copper ashes iron content is 40% or so, higher than current domestic industry ore dressing use
The grade of iron ore, additionally containing 0.2% Cu, the copper ashes processing method of present comparative maturity is that Copper making clinker process is " slow
Cold-fine grinding-flotation " technique reclaims copper, but the tailings after flotation do not utilized (referred to as " copper tailings ") well.It is rich
The copper tailings of iron content is largely stored up, and not only causes the significant wastage of resource, and land occupation, pollution environment, hinders Copper making enterprise
The sustainable development of industry.
Iron is mainly with fayalite (2FeOSiO in copper tailings2) form exist, the fusing point of fayalite is 1205
DEG C, because ferriferous oxide reduction reaction slows down under molten condition, take direct-reduction-mill ore magnetic selection technique to carry out processing copper
The temperature in heating reduction process must be controlled during tailings.The heating-up temperature of general copper tailings carbonaceous pelletizing is all than relatively low, reduction
Time grow, caused by result be exactly low production efficiency；Simultaneously because reduction temperature is low, it is thinner to be reduced directly iron particle in product
It is small so that follow-up mill ore magnetic selection process energy consumption is too high, and mill selects Iron grade in product low.It is relatively wider in present copper ashes processing procedure
The solution method of general use is that solved by substantial amounts of lime stone, but result and unsatisfactory.
High-phosphor oolitic hematite be it is generally acknowledged both at home and abroad at present be most difficult to select one of iron ore type of smelting, its phosphorous height
(0.4%~1.8%), Iron grade are relatively low (45%~50%).The main preservation of phosphorus in iron ore in collophane, and with rich in
The chamosite of iron oxide is mixed in together, forms the alternate oolith structure of concentric layered shell polysaccharide, and iron oxide crystallite size is thin in ore
It is micro-, and cloth relation embedding with gangue is complicated, dissociation is difficult.As mineral resources largely develop and utilize, ore is increasingly poor, faces
The reality that iron ore concentrate demand increases severely and China's iron ore deposit is poor, thin, miscellaneous, the various iron ores of comprehensive development and utilization have been necessarily to become
Gesture.The domestic and international beneficiation research of high-phosphor oolitic hematite include dephosphorization, desiliconization, reverse floatation process, high-gradient magnetic separation, new equipment and
New technology, direct-reduction process, acidleach, chloridising roasting-acid leaching process etc., but the report being successfully enriched with to it is seldom.
The fast development of modern industry, the environmental pollution being on the rise accelerate the corrosion damage of steel in use
Consumption, increasingly causes the concern of people.Phosphorous weathering steel as a kind of structural steel for being obviously prolonged component service life, due to
It has the performances such as good weatherability, excellent mechanical property, preferable weldability concurrently, and its have economize on resources,
The Special Significance of environmental protection etc., makes its most attention by countries in the world all the time, and application is also increasingly extensive.With
China Railway, highway transportation and the continuous development of shipping, to rolling stock, various weather-proof building structural parts, container
Roll up with the demand of bridge ancillary structural member, production cupric phosphorus weathering steel has preferable market prospects；In addition China is resistance to
Time property alloying element Ni, Cr scarcity of resources, therefore be an inexorable trend in the weathering steel that China develops using Cu, P element as base.Root
Focus on to consider the performance of atmospheric corrosion resistance according to the purposes of weathering steel, the weather-proof corrosion-resistant element in steel contains typically based on Cu-P
0.07-0.15% phosphorus, as general structure steel, referred to as high-weatherability can use steel, it is cheap, environment-friendly how to obtain cost
Weathering steel is always those skilled in the art's technical problem urgently to be resolved hurrily.
Based on this, prior art has much room for improvement.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of system for producing high phosphorus weathering steel and side
Method.
To achieve these goals, the present invention uses following technical scheme：
The present invention provides a kind of system for producing high phosphorus weathering steel, including proportioner, the first shaped device, the second shaping
Device, reduction roasting device, screening plant, molten separating device, purifier and into blanking device, wherein,
The first material outlet of the proportioner is to the material inlet of first shaped device, dispensing dress
The second material outlet put to second shaped device material inlet；
The material outlet of the material outlet of first shaped device and second shaped device is respectively communicated to described
The material inlet of reduction roasting device；
The material outlet of the reduction roasting device is communicated to the material inlet of the screening plant；
The first material outlet of the screening plant to the molten separating device material inlet, the screening plant
Second material outlet to the purifier first material entrance；
The material outlet of the molten separating device is communicated to the second material entrance of the purifier；
The material outlet of the purifier is communicated to the material inlet into blanking device.
Further, the proportioner include be respectively connecting to the proportioner material inlet copper tailings storehouse,
High phosphorus ore storage bin, reducing agent storehouse, binding agent storehouse and additive bin.
Further,
First shaped device includes the first feed belt, the first batch mixer, disc balling machine and the first outfeed belt,
The material inlet of first feed belt is communicated to the first material outlet of the proportioner, first feed belt
Material outlet is communicated to the material inlet of first batch mixer, and the material outlet of first batch mixer is communicated to the disk
The material inlet of pelletizer, the material outlet of the disc balling machine are communicated to the material inlet of first outfeed belt, institute
The material outlet for stating the first outfeed belt is communicated to the material inlet of the reduction roasting device.
Further,
Second shaped device includes the second feed belt, the second batch mixer, two pairs of rollers ball press and the second outfeed belt,
The material inlet of second feed belt is communicated to the second material outlet of the proportioner, second feed belt
Material outlet is communicated to the material inlet of second batch mixer, and the material outlet of second batch mixer is communicated to the two pairs of rollers
The material inlet of ball press, the material outlet of the two pairs of rollers ball press are communicated to the material inlet of second outfeed belt, institute
The material outlet for stating the second outfeed belt is communicated to the material inlet of the reduction roasting device.
The present invention also provides a kind of method that high phosphorus weathering steel is produced using said system, comprises the following steps：
(1) dispensing：Copper tailings mixture is formed after copper tailings, the first reducing agent and the first binding agent are mixed, by high phosphorus
High phosphorus ore mixture is formed after ore deposit, the second reducing agent, additive and the mixing of the second binding agent；
(2) it is molded：The copper tailings mixture is put into the first shaped device, obtains copper tailings pelletizing；By the high phosphorus
Ore deposit mixture puts into second shaped device, obtains high phosphorus ore pelletizing；
(3) reduction roasting：The copper tailings pelletizing and the high phosphorus ore pelletizing input reduction roasting device are reduced
Roasting, obtains copper tailings metallized pellet and high phosphorus ore metallized pellet；
(4) sieve：By screening plant respectively to the copper tailings metallized pellet and the high phosphorus ore metallized pellet
Sieved, respectively obtain copper tailings metallized pellet, phosphorous granulated iron and high basicity slag；
(5) melt and divide：The copper tailings metallized pellet is put into molten separating device and carries out molten point, obtains cupric molten steel；
(6) refine：Cupric molten steel is refined using VOD-RH methods, at the same add ferromanganese, low-carbon ferrochromium alloy and
The phosphorous granulated iron that step (4) obtains, obtains weathering steel molten steel.
Further, in step (5), further comprise adding the high basicity slag to the copper tailings metallized pellet
Composition adjustment is carried out, the addition of the high basicity slag is the 15-25% of Fe quality.
Further, further comprise：The step of using weathering steel finished product is prepared into blanking device.
Further, in step (1), the mass ratio of copper tailings, the first reducing agent and the first binding agent is 100: (18-
25)∶(3-5)；
High phosphorus ore, the second reducing agent, the mass ratio of additive and the second binding agent are 100: (15-20): (30-40): (5-
10)。
Further, in step (3),
The copper tailings pelletizing is arranged in the bottom of the reduction roasting device, and cloth layer 2-4, by the high phosphorus ore
Pelletizing is arranged in the upper strata of the reduction roasting device, individual layer cloth；
The temperature of reduction roasting is 1350-1450 DEG C, and the time of reduction roasting is 30-45min.
Further, in step (6),
The weight/mass percentage composition of each composition of the weathering steel molten steel is：C 0.01-0.04%, Cu0.30-0.45%, P
0.10-0.12%, S 0.01-0.02%, Si 0.20-0.40%, Mn 0.2-0.4%, Cr 0.3-0.6%, surplus Fe.
The present invention advantageous effects be：
(1) present invention realizes copper tail using the raw material of cheap copper tailings and high phosphorus ore as production weathering steel
The recycling of copper and ferro element in slag, the P elements in high phosphorus ore, copper tailings belong to the solid waste of coloured industry, high
Phosphorus ore is intractable mineral, and the present invention turns waste into wealth, economized on resources, reduces environmental pollution, and has considerable economic benefit；
(2) present invention can realize long-term scale using rotary hearth furnace to copper tailings pelletizing and high phosphorus ore pelletizing reduction roasting
Metaplasia is produced, and improves production efficiency.The present invention greatly reduces the production of weathering steel without undergoing the processes such as sintering, blast furnace, converter
Cost.
Brief description of the drawings
Fig. 1 is the structural representation of the system of the production high phosphorus weathering steel of the present invention；
Fig. 2 is the schematic flow sheet of the method for the production high phosphorus weathering steel of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right with reference to embodiment and accompanying drawing
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in figure 1, the present invention provides a kind of system for producing high phosphorus weathering steel, including proportioner, the first shaping dress
Put, the second shaped device, reduction roasting device, screening plant, molten separating device, purifier and into blanking device.
The first material outlet of proportioner is to the material inlet of the first shaped device, the second material of proportioner
Outlet to the second shaped device material inlet.Proportioner includes the copper for being respectively connecting to the material inlet of proportioner
Tailings storehouse, high phosphorus ore storage bin, reducing agent storehouse, binding agent storehouse and additive bin.Each feed bin discharge hole is fitted with electronic scale, can be with
Accurate control discharge quantity.
The material outlet of first shaped device is communicated to the material inlet of reduction roasting device.First shaped device includes the
One feed belt, the first batch mixer, disc balling machine and the first outfeed belt, the material inlet of the first feed belt, which is communicated to, matches somebody with somebody
Expect the first material outlet of device, the material outlet of the first feed belt is communicated to the material inlet of the first batch mixer, and first is mixed
The material outlet of material machine is communicated to the material inlet of disc balling machine, and the material outlet of disc balling machine is communicated to the first discharging skin
The material inlet of band, the material outlet of the first outfeed belt are communicated to the material inlet of reduction roasting device.First batch mixer enters
One step is provided with the first chute, and the material outlet of the first chute is communicated to the material inlet of disc balling machine.First feed belt
With forced feeding function, the first feed belt is used for copper tailings, the first reducing agent and that will have been configured according to predetermined ratio
One binding agent introduces the first batch mixer, and well mixed copper tailings mixture is delivered to circle via the first chute of the first batch mixer
Disk pelletizer, obtained copper tailings pelletizing are delivered to reduction roasting device via the first outfeed belt.
The material outlet of second shaped device is communicated to the material inlet of reduction roasting device.Second shaped device includes the
Two feed belts, the second batch mixer, two pairs of rollers ball press and the second outfeed belt, the material inlet of the second feed belt, which is communicated to, matches somebody with somebody
Expect the second material outlet of device, the material outlet of the second feed belt is communicated to the material inlet of the second batch mixer, and second is mixed
The material outlet of material machine is communicated to the material inlet of two pairs of rollers ball press, and the material outlet of two pairs of rollers ball press is communicated to the second discharging skin
The material inlet of band, the material outlet of the second outfeed belt are communicated to the material inlet of reduction roasting device.Second batch mixer enters
One step is provided with the second chute, and the material outlet of the second chute is communicated to the material inlet of two pairs of rollers ball press.Second feed belt
With forced feeding function, the second feed belt is used for the high phosphorus ore, the second reducing agent, addition that will have been configured according to predetermined ratio
Agent and the second binding agent introduce the second batch mixer, and well mixed high phosphorus ore mixture is defeated via the second chute of the second batch mixer
Two pairs of rollers ball press is delivered to, obtained high phosphorus ore pelletizing is delivered to reduction roasting device via the second outfeed belt.
The material outlet of reduction roasting device is communicated to the material inlet of screening plant.Reduction roasting device has copper tailings
Pelletizing and high phosphorus ore pelletizing entrance, flue and reduzate outlet, reduction roasting device is preferably rotary hearth furnace, for different balls
Group carries out two layers of composite material-feeding up and down to the different of temperature requirement.Flue can collect zinc oxide dust with bag-type dust.
The first material outlet of screening plant to molten separating device material inlet, screening plant second material outlet
It is communicated to the first material entrance of purifier.Screening plant includes the sieve that 1 mesh number is 12mm, the sieve that 1 mesh number is 3mm
The separation that can realize copper tailings metallized pellet, phosphorous granulated iron, high basicity slag is used in combination in son, two sieves.
The material outlet of molten separating device is communicated to the second material entrance of purifier.Molten separating device is preferably electric arc furnaces,
Molten separating device has copper tailings metallized pellet entrance, bottom blowing hole and high temperature cupric molten steel outlet, cupric molten steel direct
Introduce purifier.
The material outlet of purifier is communicated into the material inlet of blanking device.Purifier is VOD refining furnaces and RH essences
Furnace is used in combination, and VOD refining furnaces are mainly used in removing the carbon and sulphur in cupric molten steel, can also be closed with addition of different types of iron
Gold carries out molten steel Alloying Treatment；RH refining furnaces are then mainly used to remove the temperature of the carbon and adjustment cupric molten steel in cupric molten steel
Degree, the weathering steel molten steel after purifier is handled are transferred into blanking device by ladle.Include tundish, knot into blanking device
Brilliant device and conticaster, weathering steel molten steel slab or square billet can be processed into as desired into blanking device.
As shown in Fig. 2 the present invention also provides a kind of method that high phosphorus weathering steel is produced using said system, including following step
Suddenly：
(1) dispensing：Copper tailings mixture is formed after copper tailings, the first reducing agent and the first binding agent are mixed, by high phosphorus
High phosphorus ore mixture is formed after ore deposit, the second reducing agent, additive and the mixing of the second binding agent；
The mass ratio of copper tailings, the first reducing agent and the first binding agent is 100: (18-25): (3-5), high phosphorus ore, second
The mass ratio of reducing agent, additive and the second binding agent is 100: (15-20): (30-40): (5-10).
Copper tailings is the tailings after copper ashes Floatation of Copper.The composition of copper tailings is by percentage to the quality：Fe39-45%, Cu
0.15-0.25%.Composition in high phosphorus ore is by percentage to the quality：Fe 45-55%, P 0.5-1%, SiP28-15%.
First reducing agent and the second reducing agent can be anthracite, semi-coke or coke powder, fix carbon content >=80%.First
The mesh number of reducing agent is less than 100 mesh, and the particle diameter of the second reducing agent is less than 1mm.First binding agent and the second binding agent can be swollen
Moisten the one or more in soil, sodium humate, modified starch.Additive can be lime stone.
(2) it is molded：Copper tailings mixture is put into the first shaped device, obtains copper tailings pelletizing；By high phosphorus ore mixture
The second shaped device is put into, obtains high phosphorus ore pelletizing.Then copper tailings pelletizing and high phosphorus ore pelletizing input drying grate are done
Dry, copper tailings pelletizing and the water content of high phosphorus ore pelletizing after drying are less than 2wt%；
The particle diameter of copper tailings pelletizing is 12-16mm, and high phosphorus ore pelletizing is pillow, and it is grown and a width of fixed value, high phosphorus ore ball
Length, width and the thickness of group are respectively 40mm × 30mm × (20-30) mm.
(3) reduction roasting：Copper tailings pelletizing and high phosphorus ore pelletizing input reduction roasting device are subjected to reduction roasting, obtained
Reduzate, reduzate is copper tailings metallized pellet and high phosphorus ore metallized pellet, the tapping temperature of reduzate are
900-1000℃；
Because the temperature of the reduction roasting needed for copper tailings pelletizing is low, copper tailings pelletizing is arranged in reduction roasting device
Bottom, and cloth layer 2-4.Because the temperature of the reduction roasting needed for high phosphorus ore pelletizing is high, high phosphorus ore pelletizing is arranged in reduction
The upper strata of calciner, and individual layer cloth.The temperature of reduction roasting is 1350-1450 DEG C, and the time of reduction roasting is 30-
45min.Dual alkalinity (the CaO/SiO of high phosphorus ore pelletizing2) it is maintained 1.8-2.2.
(4) sieve：Copper tailings metallized pellet and high phosphorus ore metallized pellet are sieved by screening plant, respectively
Obtain copper tailings metallized pellet, phosphorous granulated iron and high basicity slag；
Copper tailings pelletizing change in size after reduction roasting is little, the copper tailings metallized pellet obtained after reduction roasting
Particle diameter is still 12-16mm, and the sieve for being 12mm with mesh number sieves to it, obtains oversize copper tailings metallized pellet.So
Afterwards, high phosphorus ore metallized pellet is continued cool to less than 500 DEG C, due to phosphorous granulated iron reduzate in cooling procedure because
2CaO·SiO2Natural degradation occurs for phase transformation, therefore high phosphorus ore metallized pellet is sieved by the sieve that mesh number is 3mm
The screenings high basicity slag of the phosphorous granulated iron of oversize and size less than 3mm that size is 5-10mm can be respectively obtained.Therefore, with sieve
The separation of copper tailings metallized pellet, three kinds of phosphorous granulated iron, high basicity slag products can be achieved in son screening.Magnetic separation is not needed, is saved
About cost.Mesh number is that the oversize copper tailings metallized pellet of 12mm sieve and the screenings high basicity slag of 3mm sieves introduce
Molten separating device, the phosphorous granulated iron of oversize of 3mm sieves then introduce purifier.
(5) melt and divide：Copper tailings metallized pellet is put into molten separating device and carries out molten point, then adds high basicity slag to copper
Tailings metallized pellet carries out composition adjustment, and the addition of high basicity slag is the 15-25% of Fe quality, finally gives copper bearing steel
Water.
The weight/mass percentage composition of each composition of cupric molten steel is：C 1.50-2.50%, Cu 0.35-0.65%, P 0.02-
0.05%, Si 0.08-0.15%, S 0.04-0.07%, surplus are Fe and other inevitable impurity.Tapping temperature controls
Require that slag mixes out for 1580-1630 DEG C, during tapping.
Remaining carbon is about 6-10% in hot copper tailings metallized pellet, and non-reduced iron can be realized during molten point
The reduction of oxide and the effect of carburizer, therefore carbon raw material need not be added.
(6) refine：Cupric molten steel is refined using VOD-RH methods, further goes the removal of impurity, while adds step (4)
Obtained phosphorous granulated iron, ferromanganese and low-carbon ferrochromium alloy, the temperature and composition of cupric molten steel are adjusted, obtains weathering steel molten steel.
Wherein, phosphorous granulated iron step (4) obtained all adds, and ferromanganese addition is 25-50kg/t cupric molten steel, low
Carbon ferrochrome addition is 45-100kg/t cupric molten steel, by temperature adjustment to 1620-1650 DEG C.
Each composition of weathering steel molten steel is by percentage to the quality：C 0.01-0.04%, Cu0.30-0.45%, P
0.10-0.12%, S 0.01-0.02%, Si 0.20-0.40%, Mn 0.2-0.4%, Cr 0.3-0.6%, surplus Fe.
(7) weathering steel finished product is prepared
Obtained weathering steel molten steel continuous casting is turned into slab or square billet using into blanking device such as slab or billet caster.
It can also use Continuous mill train that resulting continuous casting steel billet or square billet further are controlled into rolling, production is suitable for being used as nothing
Application high building structure, the weather-proof steel profile of bridge structure or sheet material.
Embodiment 1
, will by copper tailings, anthracite and bentonite according to mass ratio to form copper tailings mixture after 100: 25: 5 mixing
High phosphorus ore, semi-coke, lime stone and bentonite form high phosphorus ore mixture after being mixed according to mass ratio for 100: 18: 35: 6.Copper tail
The composition of slag is by percentage to the quality：Fe 42%, Cu 0.19%.Composition in high phosphorus ore is by percentage to the quality：Fe
45%, P 0.8%, SiO215%.
Copper tailings mixture is put into disc balling machine, obtains the copper tailings pelletizing that particle diameter is 12mm；High phosphorus ore is mixed
In compound input two pairs of rollers ball press, 40mm × 30mm × 25mm high phosphorus ore pelletizing is obtained.Then by copper tailings pelletizing and high phosphorus
Ore deposit pelletizing input drying grate is dried, and copper tailings pelletizing and the water content of high phosphorus ore pelletizing after drying are less than 2wt%.
Reduction roasting will be carried out in copper tailings pelletizing and high phosphorus ore pelletizing input rotary hearth furnace, obtain copper tailings metallized pellet
With high phosphorus ore metallized pellet, the tapping temperature of reduzate is 900 DEG C.Copper tailings pelletizing is arranged in the bottom of rotary hearth furnace,
And 3 layers of cloth.High phosphorus ore pelletizing is arranged in the upper strata of rotary hearth furnace, and individual layer cloth.The temperature of reduction roasting is 1400 DEG C, also
The time of original roasting is 40min.Dual alkalinity (the CaO/SiO of high phosphorus ore pelletizing2) it is maintained 2.0.
Copper tailings metallized pellet and high phosphorus ore metallized pellet are sieved by screening plant, respectively obtain copper tail
Slag metallized pellet, phosphorous granulated iron and high basicity slag.
Copper tailings metallized pellet is put into molten separating device and carries out molten point, then adds high basicity slag to copper tailings metal
Pellet carries out composition adjustment, and the addition of high basicity slag is the 20% of Fe quality, finally gives cupric molten steel.Cupric molten steel
The weight/mass percentage composition of each composition be：C 2.05%, Cu 0.55%, P 0.04%, Si 0.10%, S 0.07%, surplus
For Fe and other inevitable impurity.Tapping temperature control is 1590 DEG C, requires that slag mixes out during tapping.Hot copper tailings gold
The carbon for belonging to remaining in pellet is about 10%, and reduction and the carburizer of non-reducing iron oxides can be realized during molten point
Effect, therefore carbon raw material need not be added.
Cupric molten steel is refined using VOD-RH methods, further goes the removal of impurity, while it is phosphorous to add obtained whole
Granulated iron, ferromanganese and low-carbon ferrochromium alloy, the temperature and composition of cupric molten steel are adjusted, obtains weathering steel molten steel.Wherein, ferromanganese adds
Measure as 35kg/t cupric molten steel, low-carbon ferrochromium addition is 85kg/t cupric molten steel, by temperature adjustment to 1630 DEG C.
Each composition of weathering steel molten steel is by percentage to the quality：C 0.02%, Cu 0.40%, P 0.11%, S
0.012%, Si 0.30%, Mn 0.3%, Cr 0.5%, surplus Fe.
Obtained weathering steel molten steel continuous casting is turned into slab or square billet using into blanking device such as slab or billet caster.
It can also use Continuous mill train that resulting continuous casting steel billet or square billet further are controlled into rolling, production is suitable for being used as nothing
Application high building structure, the weather-proof steel profile of bridge structure or sheet material.
The present embodiment realizes copper tailings using the raw material of cheap copper tailings and high phosphorus ore as production weathering steel
In copper and ferro element, the recycling of P elements in high phosphorus ore, the present embodiment is using rotary hearth furnace to copper tailings pelletizing and height
Phosphorus ore pelletizing reduction roasting, can realize long-term large-scale production, without undergoing the processes such as sintering, blast furnace, converter, substantially reduce
The production cost of weathering steel.
Embodiment 2
, will by copper tailings, semi-coke and sodium humate according to mass ratio to form copper tailings mixture after 100: 20: 4 mixing
High phosphorus ore, coke powder, lime stone and bentonite form high phosphorus ore mixture after being mixed according to mass ratio for 100: 20: 38: 9.Copper tail
The composition of slag is by percentage to the quality：Fe 40%, Cu0.24%.Composition in high phosphorus ore is by percentage to the quality：Fe
53%, P 0.7%, SiO28%.
Copper tailings mixture is put into disc balling machine, obtains the copper tailings pelletizing that particle diameter is 16mm；High phosphorus ore is mixed
In compound input two pairs of rollers ball press, 40mm × 30mm × 25mm high phosphorus ore pelletizing is obtained.Then by copper tailings pelletizing and high phosphorus
Ore deposit pelletizing input drying grate is dried, and copper tailings pelletizing and the water content of high phosphorus ore pelletizing after drying are less than 2wt%.
Reduction roasting will be carried out in copper tailings pelletizing and high phosphorus ore pelletizing input rotary hearth furnace, obtain copper tailings metallized pellet
With high phosphorus ore metallized pellet, the tapping temperature of reduzate is 1000 DEG C.Copper tailings pelletizing is arranged in the bottom of rotary hearth furnace,
And 2 layers of cloth.High phosphorus ore pelletizing is arranged in the upper strata of rotary hearth furnace, and individual layer cloth.The temperature of reduction roasting is 1390 DEG C, also
The time of original roasting is 45min.Dual alkalinity (the CaO/SiO of high phosphorus ore pelletizing2) it is maintained 2.1.
Copper tailings metallized pellet and high phosphorus ore metallized pellet are sieved by screening plant, respectively obtain copper tail
Slag metallized pellet, phosphorous granulated iron and high basicity slag.
Copper tailings metallized pellet is put into molten separating device and carries out molten point, then adds high basicity slag to copper tailings metal
Pellet carries out composition adjustment, and the addition of high basicity slag is the 15% of Fe quality, finally gives cupric molten steel.Cupric molten steel
The weight/mass percentage composition of each composition be：C 1.98%, Cu 0.50%, P 0.05%, Si 0.09%, S 0.06%, surplus
For Fe and other inevitable impurity.Tapping temperature control is 1600 DEG C, requires that slag mixes out during tapping.Hot copper tailings gold
The carbon for belonging to remaining in pellet is about 8%, and reduction and the carburizer of non-reducing iron oxides can be realized during molten point
Effect, therefore carbon raw material need not be added.
Cupric molten steel is refined using VOD-RH methods, further goes the removal of impurity, while it is phosphorous to add obtained whole
Granulated iron, ferromanganese and low-carbon ferrochromium alloy, the temperature and composition of cupric molten steel are adjusted, obtains weathering steel molten steel.Wherein, ferromanganese adds
Measure as 40kg/t cupric molten steel, low-carbon ferrochromium addition is 65kg/t cupric molten steel, by temperature adjustment to 1640 DEG C.
Each composition of weathering steel molten steel is by percentage to the quality：C 0.015%, Cu 0.42%, P 0.10%, S
0.01%, Si 0.25%, Mn 0.35%, Cr 0.4%, surplus Fe.
Obtained weathering steel molten steel continuous casting is turned into slab or square billet using into blanking device such as slab or billet caster.
It can also use Continuous mill train that resulting continuous casting steel billet or square billet further are controlled into rolling, production is suitable for being used as nothing
Application high building structure, the weather-proof steel profile of bridge structure or sheet material.
The present embodiment realizes copper tailings using the raw material of cheap copper tailings and high phosphorus ore as production weathering steel
In copper and ferro element, the recycling of P elements in high phosphorus ore, the present embodiment is using rotary hearth furnace to copper tailings pelletizing and height
Phosphorus ore pelletizing reduction roasting, can realize long-term large-scale production, without undergoing the processes such as sintering, blast furnace, converter, substantially reduce
The production cost of weathering steel.
Embodiment 3
, will by copper tailings, coke powder and sodium humate according to mass ratio to form copper tailings mixture after 100: 18: 3 mixing
High phosphorus ore, anthracite, lime stone and bentonite form high phosphorus ore mixture after being mixed according to mass ratio for 100: 15: 30: 5.Copper
The composition of tailings is by percentage to the quality：Fe 45%, Cu 0.15%.Composition in high phosphorus ore is by percentage to the quality：
Fe 55%, P 0.5%, SiO28%.
Copper tailings mixture is put into disc balling machine, obtains the copper tailings pelletizing that particle diameter is 14mm；High phosphorus ore is mixed
In compound input two pairs of rollers ball press, 40mm × 30mm × 20mm high phosphorus ore pelletizing is obtained.Then by copper tailings pelletizing and high phosphorus
Ore deposit pelletizing input drying grate is dried, and copper tailings pelletizing and the water content of high phosphorus ore pelletizing after drying are less than 2wt%.
Reduction roasting will be carried out in copper tailings pelletizing and high phosphorus ore pelletizing input rotary hearth furnace, obtain copper tailings metallized pellet
With high phosphorus ore metallized pellet, the tapping temperature of reduzate is 950 DEG C.Copper tailings pelletizing is arranged in the bottom of rotary hearth furnace,
And 4 layers of cloth.High phosphorus ore pelletizing is arranged in the upper strata of rotary hearth furnace, and individual layer cloth.The temperature of reduction roasting is 1450 DEG C, also
The time of original roasting is 30min.Dual alkalinity (the CaO/SiO of high phosphorus ore pelletizing2) it is maintained 2.2.
Copper tailings metallized pellet and high phosphorus ore metallized pellet are sieved by screening plant, respectively obtain copper tail
Slag metallized pellet, phosphorous granulated iron and high basicity slag.
Copper tailings metallized pellet is put into molten separating device and carries out molten point, then adds high basicity slag to copper tailings metal
Pellet carries out composition adjustment, and the addition of high basicity slag is the 25% of Fe quality, finally gives cupric molten steel.Cupric molten steel
The weight/mass percentage composition of each composition be：C 1.50%, Cu0.35%, P 0.02%, Si 0.08%, S 0.04%, surplus are
Fe and other inevitable impurity.Tapping temperature control is 1630 DEG C, requires that slag mixes out during tapping.Hot copper tailings metal
Remaining carbon is about 6% in pellet, and reduction and the carburizer of non-reducing iron oxides can be realized during molten point
Effect, therefore carbon raw material need not be added.
Cupric molten steel is refined using VOD-RH methods, further goes the removal of impurity, while it is phosphorous to add obtained whole
Granulated iron, ferromanganese and low-carbon ferrochromium alloy, the temperature and composition of cupric molten steel are adjusted, obtains weathering steel molten steel.Wherein, ferromanganese adds
Measure as 25kg/t cupric molten steel, low-carbon ferrochromium addition is 45kg/t cupric molten steel, by temperature adjustment to 1650 DEG C.
Each composition of weathering steel molten steel is by percentage to the quality：C 0.01%, Cu 0.30%, P 0.12%, S
0.02%, Si 0.20%, Mn 0.2%, Cr 0.3%, surplus Fe.
Obtained weathering steel molten steel continuous casting is turned into slab or square billet using into blanking device such as slab or billet caster.
It can also use Continuous mill train that resulting continuous casting steel billet or square billet further are controlled into rolling, production is suitable for being used as nothing
Application high building structure, the weather-proof steel profile of bridge structure or sheet material.
The present embodiment realizes copper tailings using the raw material of cheap copper tailings and high phosphorus ore as production weathering steel
In copper and ferro element, the recycling of P elements in high phosphorus ore, the present embodiment is using rotary hearth furnace to copper tailings pelletizing and height
Phosphorus ore pelletizing reduction roasting, can realize long-term large-scale production, without undergoing the processes such as sintering, blast furnace, converter, substantially reduce
The production cost of weathering steel.
Embodiment 4
, will by copper tailings, semi-coke and sodium humate according to mass ratio to form copper tailings mixture after 100: 22: 3 mixing
High phosphorus ore, anthracite, lime stone and bentonite form high phosphorus ore mixture after being mixed according to mass ratio for 100: 17: 40: 10.Copper
The composition of tailings is by percentage to the quality：Fe 40%, Cu0.25%.Composition in high phosphorus ore is by percentage to the quality：Fe
55%, P 1.0%, SiO210%.
Copper tailings mixture is put into disc balling machine, obtains the copper tailings pelletizing that particle diameter is 15mm；High phosphorus ore is mixed
In compound input two pairs of rollers ball press, 40mm × 30mm × 30mm high phosphorus ore pelletizing is obtained.Then by copper tailings pelletizing and high phosphorus
Ore deposit pelletizing input drying grate is dried, and copper tailings pelletizing and the water content of high phosphorus ore pelletizing after drying are less than 2wt%.
Reduction roasting will be carried out in copper tailings pelletizing and high phosphorus ore pelletizing input rotary hearth furnace, obtain copper tailings metallized pellet
With high phosphorus ore metallized pellet, the tapping temperature of reduzate is 1000 DEG C.Copper tailings pelletizing is arranged in the bottom of rotary hearth furnace,
And 2 layers of cloth.High phosphorus ore pelletizing is arranged in the upper strata of rotary hearth furnace, and individual layer cloth.The temperature of reduction roasting is 1350 DEG C, also
The time of original roasting is 45min.Dual alkalinity (the CaO/SiO of high phosphorus ore pelletizing2) it is maintained 2.1.
Copper tailings metallized pellet and high phosphorus ore metallized pellet are sieved by screening plant, respectively obtain copper tail
Slag metallized pellet, phosphorous granulated iron and high basicity slag.
Copper tailings metallized pellet is put into molten separating device and carries out molten point, then adds high basicity slag to copper tailings metal
Pellet carries out composition adjustment, and the addition of high basicity slag is the 25% of Fe quality, finally gives cupric molten steel.Cupric molten steel
The weight/mass percentage composition of each composition be：C 2.5%, Cu 0.65%, P 0.04%, Si 0.15%, S 0.05%, surplus are
Fe and other inevitable impurity.Tapping temperature control is 1580 DEG C, requires that slag mixes out during tapping.Hot copper tailings metal
Remaining carbon is about 8% in pellet, and reduction and the carburizer of non-reducing iron oxides can be realized during molten point
Effect, therefore carbon raw material need not be added.
Cupric molten steel is refined using VOD-RH methods, further goes the removal of impurity, while it is phosphorous to add obtained whole
Granulated iron, ferromanganese and low-carbon ferrochromium alloy, the temperature and composition of cupric molten steel are adjusted, obtains weathering steel molten steel.Wherein, ferromanganese adds
Measure as 50kg/t cupric molten steel, low-carbon ferrochromium addition is 100kg/t cupric molten steel, by temperature adjustment to 1620 DEG C.
Each composition of weathering steel molten steel is by percentage to the quality：C 0.04%, Cu 0.45%, P 0.12%, S
0.02%, Si 0.4%, Mn 0.4%, Cr 0.6%, surplus Fe.
Obtained weathering steel molten steel continuous casting is turned into slab or square billet using into blanking device such as slab or billet caster.
It can also use Continuous mill train that resulting continuous casting steel billet or square billet further are controlled into rolling, production is suitable for being used as nothing
Application high building structure, the weather-proof steel profile of bridge structure or sheet material.
The present embodiment realizes copper tailings using the raw material of cheap copper tailings and high phosphorus ore as production weathering steel
In copper and ferro element, the recycling of P elements in high phosphorus ore, the present embodiment is using rotary hearth furnace to copper tailings pelletizing and height
Phosphorus ore pelletizing reduction roasting, can realize long-term large-scale production, without undergoing the processes such as sintering, blast furnace, converter, substantially reduce
The production cost of weathering steel.
Iron content 39%~45% in copper tailings, and mainly with 2FeOSiO2Form is present, in heating reduction process
In easily melt；Iron content 45%~55%, predominantly Fe in high-phosphor oolitic hematite (being designated as high phosphorus ore)2O3, hold very much
Easily reduction.Reduction roasting is carried out to copper tailings carbonaceous pelletizing and high phosphorus ore carbonaceous pelletizing using composite material-feeding mode, respectively obtained
Copper tailings metallized pellet and high phosphorus ore metallized pellet, high phosphorus ore metallized pellet can form phosphorous granulated iron and height from efflorescence
Basicity slag.Copper tailings metallized pellet is distributed in bottom, enables to granulated slag smoothly to discharge rotary hearth furnace.Can using sieving technology
Realize the separation of copper tailings metallized pellet, three kinds of phosphorous granulated iron, high basicity slag products.High basicity slag, can because basicity is higher
So that for adjusting the slag phase composition during molten point of copper tailings metallized pellet, cupric granulated iron can be used as cupric liquid steel refining to close
Phosphorus-containing alloy raw material during aurification, and then obtain cupric phosphorus weathering steel molten steel.
Embodiment described above only expresses embodiments of the present invention, and its description is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection model of the present invention
Enclose.
Claims (10)
1. a kind of system for producing high phosphorus weathering steel, it is characterised in that including proportioner, the first shaped device, the second shaping
Device, reduction roasting device, screening plant, molten separating device, purifier and into blanking device, wherein,
The first material outlet of the proportioner to first shaped device material inlet, the proportioner
Second material outlet to second shaped device material inlet；
The material outlet of the material outlet of first shaped device and second shaped device is respectively communicated to the reduction
The material inlet of calciner；
The material outlet of the reduction roasting device is communicated to the material inlet of the screening plant；
The first material outlet of the screening plant to the molten separating device material inlet, the second of the screening plant
Material outlet is communicated to the first material entrance of the purifier；
The material outlet of the molten separating device is communicated to the second material entrance of the purifier；
The material outlet of the purifier is communicated to the material inlet into blanking device.
2. system according to claim 1, it is characterised in that the proportioner includes being respectively connecting to the dispensing dress
Copper tailings storehouse, high phosphorus ore storage bin, reducing agent storehouse, binding agent storehouse and the additive bin for the material inlet put.
3. system according to claim 1, it is characterised in that
First shaped device includes the first feed belt, the first batch mixer, disc balling machine and the first outfeed belt, described
The material inlet of first feed belt is communicated to the first material outlet of the proportioner, the material of first feed belt
For outlet to the material inlet of first batch mixer, the material outlet of first batch mixer is communicated to the disk pelletizing
The material inlet of machine, the material outlet of the disc balling machine are communicated to the material inlet of first outfeed belt, and described
The material outlet of one outfeed belt is communicated to the material inlet of the reduction roasting device.
4. system according to claim 1, it is characterised in that
Second shaped device includes the second feed belt, the second batch mixer, two pairs of rollers ball press and the second outfeed belt, described
The material inlet of second feed belt is communicated to the second material outlet of the proportioner, the material of second feed belt
For outlet to the material inlet of second batch mixer, the material outlet of second batch mixer is communicated to the two pairs of rollers pressure ball
The material inlet of machine, the material outlet of the two pairs of rollers ball press are communicated to the material inlet of second outfeed belt, and described
The material outlet of two outfeed belts is communicated to the material inlet of the reduction roasting device.
5. a kind of method that usage right requires the system production high phosphorus weathering steel described in any one of 1-4, it is characterised in that including
Following steps：
(1) dispensing：Will copper tailings, the first reducing agent and the first binding agent mix after form copper tailings mixture, by high phosphorus ore, the
High phosphorus ore mixture is formed after two reducing agents, additive and the mixing of the second binding agent；
(2) it is molded：The copper tailings mixture is put into the first shaped device, obtains copper tailings pelletizing；The high phosphorus ore is mixed
Compound puts into second shaped device, obtains high phosphorus ore pelletizing；
(3) reduction roasting：The copper tailings pelletizing and the high phosphorus ore pelletizing input reduction roasting device are subjected to reduction roasting,
Obtain copper tailings metallized pellet and high phosphorus ore metallized pellet；
(4) sieve：The copper tailings metallized pellet and the high phosphorus ore metallized pellet are carried out respectively by screening plant
Screening, respectively obtains copper tailings metallized pellet, phosphorous granulated iron and high basicity slag；
(5) melt and divide：The copper tailings metallized pellet is put into molten separating device and carries out molten point, obtains cupric molten steel；
(6) refine：Cupric molten steel is refined using VOD-RH methods, while adds ferromanganese, low-carbon ferrochromium alloy and step
(4) the phosphorous granulated iron obtained, obtains weathering steel molten steel.
6. according to the method for claim 5, it is characterised in that in step (5), further comprise adding the high alkalinity
Slag carries out composition adjustment to the copper tailings metallized pellet, and the addition of the high basicity slag is the 15-25% of Fe quality.
7. according to the method for claim 5, it is characterised in that further comprise：Using into blanking device prepare weathering steel into
The step of product.
8. according to the method for claim 5, it is characterised in that in step (1), copper tailings, the first reducing agent and first
The mass ratio of binding agent is 100: (18-25): (3-5)；
High phosphorus ore, the second reducing agent, the mass ratio of additive and the second binding agent are 100: (15-20): (30-40): (5-10).
9. according to the method for claim 5, it is characterised in that in step (3),
The copper tailings pelletizing is arranged in the bottom of the reduction roasting device, and cloth layer 2-4；By the high phosphorus ore pelletizing
It is arranged in the upper strata of the reduction roasting device, individual layer cloth；
The temperature of reduction roasting is 1350-1450 DEG C, and the time of reduction roasting is 30-45min.
10. according to the method for claim 5, it is characterised in that in step (6),
The weight/mass percentage composition of each composition of the weathering steel molten steel is：C 0.01-0.04%, Cu 0.30-0.45%, P
0.10-0.12%, S 0.01-0.02%, Si 0.20-0.40%, Mn 0.2-0.4%, Cr 0.3-0.6%, surplus Fe.
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| CN201711400809.3A CN107881399A (en) | 2017-12-21 | 2017-12-21 | A kind of system and method for producing high phosphorus weathering steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852812A (en) * | 2019-04-10 | 2019-06-07 | 华北理工大学 | A method of processing copper ashes device and processing copper ashes |
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2017
- 2017-12-21 CN CN201711400809.3A patent/CN107881399A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852812A (en) * | 2019-04-10 | 2019-06-07 | 华北理工大学 | A method of processing copper ashes device and processing copper ashes |
| CN109852812B (en) * | 2019-04-10 | 2024-01-26 | 华北理工大学 | Device for treating copper slag and method for treating copper slag |
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