CN206986219U - A kind of system of duplexing skill ball production chromium ferronickel composite alloy - Google Patents
A kind of system of duplexing skill ball production chromium ferronickel composite alloy Download PDFInfo
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- CN206986219U CN206986219U CN201720724719.9U CN201720724719U CN206986219U CN 206986219 U CN206986219 U CN 206986219U CN 201720724719 U CN201720724719 U CN 201720724719U CN 206986219 U CN206986219 U CN 206986219U
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Abstract
A kind of system of duplexing skill ball production chromium ferronickel composite alloy is the utility model is related to, wherein, system includes：Crushing and screening device, the first mixing device, press ball device and the first drying unit being sequentially connected；Ore grinding device, the second mixing device, palletizing device and the second drying unit being sequentially connected；The rotary hearth furnace with double-layer cloth system being connected respectively with first drying unit and the second drying unit；The smelting apparatus being connected with the rotary hearth furnace.The utility model does raw material with the mixing pelletizing of chromite and lateritic nickel ore, according to the exclusive characteristic of raw material, using double-layer cloth system and duplexing skill ball mode, the granularity and diameter of two kinds of raw material pelletizings are strictly controlled, improves the heat utilization rate and production capacity of rotary hearth furnace.
Description
Technical field
The utility model belongs to metallurgical technology field, and in particular to a kind of duplexing skill ball production chromium ferronickel composite alloy
System.
Background technology
Rotary hearth furnace is the rotary annular high temperature kiln in a bottom, and burner is distributed in upper furnace, and fuel fires through burner
Heat is produced after burning, furnace bottom material is transferred heat to by way of radiant heat transfer.At present, rotary hearth furnace is mainly used to reduce certain
A kind of iron-containing resource, such as Dust of Iron And Steel Works, schreyerite, lateritic nickel ore, chromite, the single raw material of iron containing metallurgical slag, rotary hearth furnace
Concrete technology flow process is：A certain iron-bearing material is incorporated to certain reduction coal, adds appropriate other additives and moisture,
Carbonaceous pelletizing is made in compound after fully mixing, is equably distributed in and turned by rotary hearth furnace cloth system after the processing of pelletizing drying
On the stove furnace bottom of bottom, furnace bottom carries pelletizing and passes through preheating section and reduction section successively, and reduction is completed at a high temperature of 1000 DEG C -1300 DEG C
Afterwards, then via discharging machine furnace charge is discharged, in reduction process, fuel combustion is produced from heat mainly by the side of radiant heat transfer
Formula passes to furnace charge from top to down, and this heat transfer type just determines, for the carbonaceous pelletizing of a certain material in stove,
The fabric thickness of pelletizing can not be too thick, otherwise can cause to cause pelletizing reduction uneven, effect is reduced by the pelletizing on upper strata to lower floor
The situation that fruit is gradually deteriorated, finally influences product index.It can be said that it is that rotary hearth furnace is inherent that can only select thin bed of material cloth
One big drawback, this also greatly limit the production capacity of rotary hearth furnace.On the other hand, in stainless steel smelting process, as stainless steel master
It is respectively with ferrochrome, dilval to want the chromium of composition and nickel（Or pure nickel）State add（I.e. chromium is with ferrochrome
State add, nickel is with the addition of the state of dilval）, there is presently no a kind of material occurred to provide for stainless steel
Chromium source, and can provide nickel source for stainless steel；In addition, in traditional stainless steel smelting, ferrochrome is finally to be formed by electro-smelting,
Dilval is finally formed by electric furnace or blast furnace smelting, and electric furnace process will consume the electric energy of costliness, and high energy consumption, cost are high, blast furnace
For rule due to high energy consumption high pollution problem situation on the verge of being replaced, how to design one kind can low energy consumption, at low cost production chromium nickel
The technique of ferrum composite alloy turns into the technical problem of this area urgent need to resolve.
Utility model content
The utility model is in view of the shortcomings of the prior art, it is proposed that a kind of duplexing skill ball production chromium ferronickel composite alloy
System, raw material is done with the mixing pelletizing of chromite and lateritic nickel ore, according to the exclusive characteristic of raw material, using double-layer cloth system and
Duplexing skill ball mode, the granularity and diameter of two kinds of raw material pelletizings are strictly controlled, improves heat utilization rate and the production of rotary hearth furnace
Energy.
To solve one of above-mentioned technical problem, the technical scheme that the utility model is taken is：
The utility model proposes a kind of system of duplexing skill ball production chromium ferronickel composite alloy, it is characterised in that bag
Include：Crushing and screening device, the first mixing device, press ball device, the first drying unit；Ore grinding device, the second mixing device, pelletizing
Device, the second drying unit, rotary hearth furnace and smelting apparatus, wherein, the crushing and screening device that is sequentially connected, the first mixing device,
Press ball device and the first drying unit, it will be dried after lateritic nickel ore crushing and screening, mixing, compacting balling-up, obtain lateritic nickel ore and do
Dry pelletizing；Ore grinding device, the second mixing device, palletizing device and the second drying unit being sequentially connected, by ferrochrome mineral aggregate it is levigate,
Dried after mixing, pelletizing, obtain chromite and dry pelletizing；Rotary hearth furnace with double-layer cloth system is dried with described first respectively
Device and the second drying unit are connected, and the lateritic nickel ore is dried into pelletizing and chromite dries pelletizing layered arrangement at described turn
In the stove of bottom；The smelting apparatus is connected with the rotary hearth furnace, and the discharging pelletizing mixture to rotary hearth furnace carries out melting, obtains chromium nickel
Ferrum composite alloy.
Further, the crushing and screening device includes：Broken entrance, broken outlet, for lateritic nickel ore to be broken
Broken, screening process, obtain the lateritic nickel ore of suitable particle size；First mixing device includes：Lateritic nickel ore entrance, the first reduction
Agent entrance, the first additive entrance, the first water inlet and the outlet of lateritic nickel ore mixed material, the lateritic nickel ore entrance and described
Broken outlet is connected, and for lateritic nickel ore, the first reducing agent, the first additive and water to be mixed, obtains lateritic nickel ore and mixes
Compound material.
Further, the press ball device includes：Lateritic nickel ore mixed material entrance and the aqueous pelletizing outlet of lateritic nickel ore,
The lateritic nickel ore mixed material entrance is connected with the mixing lateritic nickel ore mixed material outlet, for lateritic nickel ore to be mixed
Material carries out pressure ball processing, obtains the aqueous pelletizing of lateritic nickel ore；First drying unit includes：The aqueous pelletizing of lateritic nickel ore enters
Mouth and lateritic nickel ore dry pelletizing outlet, the aqueous pelletizing entrance of the lateritic nickel ore pelletizing outlet phase aqueous with the lateritic nickel ore
Even, for the aqueous pelletizing of lateritic nickel ore to be dried, obtain lateritic nickel ore and dry pelletizing.
Further, the ball-and-socket of the press ball device is shaped as ellipse, ball-and-socket length 20-50mm, width 15-35mm,
Depth 5-13mm.
Further, the ore grinding device includes：Ore grinding entrance and ore grinding outlet, for chromite to be carried out into levigate place
Reason, obtains particulate grade chromite raw material；Second mixing device includes：Chromite entrance, the second reducing agent entrance, second add
Add agent entrance, the second water inlet and the outlet of chromite mixed material, the chromite entrance is connected with ore grinding outlet, is used for
Chromite, the second reducing agent, Second addition and water are mixed, obtain chromite mixed material.
Further, the palletizing device includes：Chromite mixed material entrance and the aqueous pelletizing outlet of chromite, it is described
Chromite mixed material entrance is connected with the mixing chromite mixed material outlet, for chromite mixed material to be justified
Disk pelletizing, obtain the aqueous pelletizing of chromite of the spherical shape of rule so that space is left between pelletizing, is easy to conduct heat；Described
Two drying units include：The aqueous pelletizing entrance of chromite and chromite dry pelletizing outlet, the aqueous pelletizing entrance of chromite
Pelletizing outlet aqueous with the chromite is connected, and for the aqueous pelletizing of chromite to be dried, obtains chromite and dries pelletizing.
Further, the rotary hearth furnace with double-layer cloth system includes：Rotary hearth furnace furnace chamber, ring-shaped furnace bottom and flue gas go out
Mouthful, wherein, the ring-shaped furnace bottom is rotatably arranged in the rotary hearth furnace furnace chamber bottom, and its circumference of the rotary hearth furnace furnace chamber is divided successively
For feed zone, reducing zone and discharge zone, the first distribution device and the second distribution device are provided with positioned at the feed zone, described first
Distribution device is dried pelletizing outlet with lateritic nickel ore and is connected, and second distribution device is dried pelletizing outlet with chromite and is connected,
The discharge zone is provided with rotary hearth furnace discharging device, for the discharging pelletizing mixture after reduction to be transferred out into rotary hearth furnace, wherein, institute
State the first distribution device and lateritic nickel ore drying pelletizing is layered on lower floor, chromite drying pelletizing is layered on by second distribution device
Upper strata.
Further, the smelting apparatus includes：Hot pelletizing entrance, the outlet of chromium ferronickel composite alloy and slag outlet,
The hot pelletizing entrance is connected with the rotary hearth furnace discharging device, for discharging pelletizing mixture to be carried out into high melt, obtains
To chromium ferronickel composite alloy and clinker.
The utility model comprises at least following beneficial effect：
1）According to different iron-containing resources（Lateritic nickel ore and chromite）This characteristic of different reduction temperatures is needed, using double
Layer cloth system and duplexing skill ball mode, the granularity and diameter of two kinds of raw material pelletizings are strictly controlled, realizes heat energy in difference
Cascade utilization between the bed of material, improve energy utilization rate；
2）Lateritic nickel ore carries out break process, Task-size Controlling below -3mm, wherein more than 1mm account for the 30% of gross weight with
On, the efficient reduction of lateritic nickel ore can be achieved under the conditions of the granularity（Lateritic nickel ore easily reduces）, while with subsequently selected pressure ball this
One balling technique phase mutual induction, it is not required to waste energy consumption granularity is further levigate；
3）Chromite carries out levigate processing, and granularity be -100 mesh, and accounts for more than the 50% of gross weight, the selection of the granularity and
This balling technique of follow-up pelletizing mutually echoes, and is easy to the contact area of pelletizing, and can increase chromite and reducing agent, has and utilize chromium
The progress of iron ore reduction reaction；
4）The mode that the utility model have chosen disk pelletizing handles chromite, and it is in relatively regular spherical shape to make pelletizing shape
（Rather than ellipse or other shapes）, and pelletizing diameter is between 8-25mm, pelletizing moderate in grain size, and size is than more uniform,
Without too small and excessive pelletizing, so, on the one hand, certain space can be left between the chromite pelletizing and pelletizing of spherical shape,
And will not be filled up space by the too small pelletizing of diameter, utilize heat transfer.On the other hand, the excessive pelletizing of diameter is not contained, otherwise
Meeting causes the reduction of the material at pelletizing center of circle position insufficient because pelletizing diameter is excessive；The preferable grading of the utility model is set
It is designed with the bed of material beneficial to heat from upper strata chromite pelletizing to lower floor's lateritic nickel ore pelletizing transmission, makes heat energy by greatest extent
Cascade utilization, energy utilization rate are high；
5）In rotary hearth furnace processing procedure, the utility model can be gone back to two different kinds of iron-containing resource simultaneously
Original, breach the monistic limitation of raw material；
6）Overcome that rotary hearth furnace is inherent can only to select thin this drawback of bed of material cloth, realize rotary hearth furnace deep bed sintering
Cloth, substantially increase rotary hearth furnace production capacity；
7）Relative in traditional stainless steel smelting, nickel source, chromium source are provided by dilval, ferrochrome respectively, and this reality
Chromium ferronickel composite alloy this new material is finally given with new, a kind of material can meet downstream stainless steel smelting pair simultaneously
Nickel source, the demand in chromium source.
Brief description of the drawings
Fig. 1 is the flow chart of the utility model method.
Fig. 2 is the structural representation of Tthe utility model system.
Wherein, crushing and screening device 1, entrance 101 is crushed, crushes outlet 102, the first mixing device 2, lateritic nickel ore entrance
201, the first reducing agent entrance 202, the first additive entrance 203, the first water inlet 204, the outlet of lateritic nickel ore mixed material
205, press ball device 3, lateritic nickel ore mixed material entrance 301, the aqueous pelletizing outlet 302 of lateritic nickel ore, the first drying unit 4,
The aqueous pelletizing entrance 401 of lateritic nickel ore, lateritic nickel ore dry pelletizing outlet 402, and ore grinding device 5, ore grinding entrance 501, ore grinding goes out
Mouth 502, the second mixing device 6, chromite entrance 601, the second reducing agent entrance 602, Second addition entrance 603, the second water
Entrance 604, chromite mixed material outlet 605, palletizing device 7, chromite mixed material entrance 701, the aqueous pelletizing of chromite
Outlet 702, the second drying unit 8, the aqueous pelletizing entrance 801 of chromite, chromite are dried pelletizing outlet 802, rotary hearth furnace 9, melted
Refine device 10, hot pelletizing entrance 1001, chromium ferronickel composite alloy outlet 1002, slag outlet 1003.
Embodiment
In order that those skilled in the art more fully understand the technical solution of the utility model, with reference to specific embodiment
The utility model is described in further detail.The embodiments described below is exemplary, is only used for explaining that this practicality is new
Type, and it is not intended that to limitation of the present utility model.Unreceipted particular technique or condition in embodiment, according in the art
Document described by technology or condition or carried out according to product description.
The utility model proposes a kind of system of duplexing skill ball production chromium ferronickel composite alloy, according to the utility model
Embodiment, Fig. 2 be Tthe utility model system structural representation, shown in reference picture 2, system described in the utility model includes：
Crushing and screening device 1, the first mixing device 2, press ball device 3, the first drying unit 4, ore grinding device 5, the second mixing device 6,
Palletizing device 7, the second drying unit 8, rotary hearth furnace 9 and smelting apparatus 10, wherein, the crushing and screening device that is sequentially connected, first
Mixing device, press ball device and the first drying unit, it will dry, obtain red after lateritic nickel ore crushing and screening, mixing, compacting balling-up
Native nickel minerals dries pelletizing；Ore grinding device, the second mixing device, palletizing device and the second drying unit being sequentially connected, by ferrochrome
Mineral aggregate is levigate, mixes, is dried after pelletizing, obtains chromite and dries pelletizing；Rotary hearth furnace with double-layer cloth system respectively with institute
State the first drying unit and the second drying unit is connected, the lateritic nickel ore is dried into pelletizing and chromite dries pelletizing layering cloth
Put in the rotary hearth furnace；The smelting apparatus is connected with the rotary hearth furnace, and the discharging pelletizing mixture to rotary hearth furnace melts
Refining, obtains chromium ferronickel composite alloy.
According to some embodiments of the utility model, crushing and screening device described in the utility model, the first mixing device, pressure
Ball device, the first drying unit, ore grinding device, the second mixing device, palletizing device, the tool of the second drying unit and smelting apparatus
Body species is unrestricted, as long as can each serve as corresponding to it and meet the effect of the utility model design, wherein, this
Press ball device described in utility model is preferably ball press, and first, second drying unit is preferably dryer, the pelletizing dress
Preferably disc balling machine is put, the smelting apparatus is preferably electric furnace or gas furnace.
According to embodiment of the present utility model, shown in reference picture 2, the crushing and screening device includes：Broken entrance 101,
Broken outlet 102, for lateritic nickel ore to be crushed, screening process, it is below -3mm to obtain granularity, and wherein more than 1mm is accounted for
More than 30% lateritic nickel ore of gross weight, because lateritic nickel ore requires relatively low to reduction temperature, when granularity reaches：Below -3mm,
The area requirement that wherein more than 1mm accounts for more than 40% can realize the efficient reduction of lateritic nickel ore, be not required to waste energy consumption and granularity is entered into one
Walk it is levigate, and the granularity selection be adapted to using pressure ball balling-up mode.
According to embodiment of the present utility model, shown in reference picture 2, first mixing device includes：Lateritic nickel ore entrance
201st, the first reducing agent entrance 202, the first additive entrance 203, the first water inlet 204 and the outlet of lateritic nickel ore mixed material
205, the lateritic nickel ore entrance with it is described it is broken outlet be connected, for by lateritic nickel ore, the first reducing agent, the first additive and
Water is mixed, and obtains lateritic nickel ore mixed material.
According to embodiment of the present utility model, shown in reference picture 2, the press ball device includes：Lateritic nickel ore mixed material
Entrance 301 and the aqueous pelletizing outlet 302 of lateritic nickel ore, the lateritic nickel ore mixed material entrance mixes with the lateritic nickel ore that mixes
Close material outlet to be connected, for lateritic nickel ore mixed material to be carried out into pressure ball processing, obtain the aqueous pelletizing of lateritic nickel ore；Described
One drying unit includes：The aqueous pelletizing entrance 401 of lateritic nickel ore and lateritic nickel ore dry pelletizing outlet 402, the lateritic nickel ore
Aqueous pelletizing entrance pelletizing outlet aqueous with the lateritic nickel ore is connected, and for the aqueous pelletizing of lateritic nickel ore to be dried, obtains red
Native nickel minerals dries pelletizing.
According to some embodiments of the utility model, the ball-and-socket of the press ball device is shaped as ellipse, ball-and-socket length 20-
50mm, width 15-35mm, depth 5-13mm；Preferably, ball-and-socket length 30-40mm, width 22-32mm, depth 7-10mm；Most
Goodly, ball-and-socket length 33mm, ball-and-socket width 27mm, depth 8mm；This grading can make lateritic nickel ore pelletizing be of moderate size, and be beneficial to
Reaction, it can make both to have left suitable gap guarantee heat transfer between pelletizing again, while and can makes full use of the confined space to ensure production capacity
It is larger.
According to embodiment of the present utility model, shown in reference picture 2, the ore grinding device 5 includes：Ore grinding entrance 501 and mill
Ore deposit outlet 502, for chromite to be carried out into levigate processing, it is -100 mesh to obtain granularity, and accounts for more than 50% ferrochrome of gross weight
Ore deposit raw material, it is high to temperature requirement because ferrochrome mine disaster reduces, and chromite can be increased to connecing for chromite and reducing agent after levigate
Contacting surface is accumulated, and effectively reduces reduction temperature, and according to some embodiments of the utility model, the utility model is preferably that -100 mesh account for
50%, if than the coarse size, reduction temperature need to significantly be lifted, energy consumption and financial cost can be greatly increased, otherwise can influenceed also
Former effect.
According to embodiment of the present utility model, shown in reference picture 2, second mixing device includes：Chromite entrance
601st, the second reducing agent entrance 602, Second addition entrance 603, the second water inlet 604 and chromite mixed material outlet 605,
The chromite entrance is connected with ore grinding outlet, for chromite, the second reducing agent, Second addition and water to be mixed
Close, obtain chromite mixed material.
According to embodiment of the present utility model, shown in reference picture 2, the palletizing device includes：Chromite mixed material enters
Mouth 701 and the aqueous pelletizing outlet 702 of chromite, the chromite mixed material entrance goes out with the chromite mixed material that mixes
Mouthful it is connected, for chromite mixed material to be carried out into disk pelletizing, obtains spherical shape of the diameter in 8-25mm scopes of rule
The aqueous pelletizing of chromite, due in reduction process, because chromite is difficult to reduce, high is required to reduction temperature, so by chromium
Iron ore pellets have been layered on the upper strata of lateritic nickel ore pelletizing, and temperature is passed layer by layer during lateritic nickel ore is transferred to by chromite
Subtract, therefore, the mode that the utility model have chosen disk pelletizing handles chromite, and it is in relatively regular spherical shape to make pelletizing shape
（Rather than ellipse or other shapes）, and pelletizing diameter, between 8-25mm, pelletizing is larger, and size is than more uniform, such as
This, in can leave certain space between the chromite pelletizing and pelletizing of spherical shape, and the too small pelletizing of diameter will not be crossed will
Space is filled up, and the diameter of pelletizing can then cause greatly the material at pelletizing center of circle position to reduce insufficient, the preferable level of the utility model
It is designed with setting with the bed of material beneficial to heat from upper strata chromite pelletizing to lower floor's lateritic nickel ore pelletizing transmission, makes heat energy maximum
The cascade utilization of limit, energy utilization rate are high.
According to embodiment of the present utility model, shown in reference picture 2, second drying unit includes：Chromite contains water polo
Group's entrance 801 and chromite dry pelletizing outlet 802, and the aqueous pelletizing entrance of chromite goes out with the aqueous pelletizing of the chromite
Mouth is connected, and for the aqueous pelletizing of chromite to be dried, obtains chromite and dries pelletizing.
According to some embodiments of the utility model, the rotary hearth furnace with double-layer cloth system includes：Rotary hearth furnace
Chamber, ring-shaped furnace bottom and exhanst gas outlet, wherein, the ring-shaped furnace bottom is rotatably arranged in the rotary hearth furnace furnace chamber bottom, described turn
Bottom stove furnace chamber is divided into feed zone, reducing zone and discharge zone along its circumference, and the first distribution device is provided with positioned at the feed zone
With the second distribution device, first distribution device and lateritic nickel ore are dried pelletizing outlet and are connected, second distribution device and
Chromite is dried pelletizing outlet and is connected, and lateritic nickel ore drying pelletizing is layered on lower floor, second cloth by first distribution device
Chromite drying pelletizing is layered on upper strata by material device, and the discharge zone is provided with rotary hearth furnace discharging device, for by going out after reduction
Pellet group's mixture is transferred out rotary hearth furnace, is gone back using double-layer cloth mode, while to two different kinds of iron-containing resource
Original, breach the monistic limitation of raw material.
According to embodiment of the present utility model, shown in reference picture 2, the smelting apparatus includes：Hot pelletizing entrance 1001,
Chromium ferronickel composite alloy outlet 1002 and slag outlet 1003, the hot pelletizing entrance and the rotary hearth furnace discharging device phase
Even, for discharging pelletizing mixture to be carried out into high melt, chromium ferronickel composite alloy and clinker are obtained.
In another aspect of the present utility model, it is proposed that one kind is answered using foregoing duplexing skill ball production chromium ferronickel
Close alloy system carry out produce chromium ferronickel composite alloy method, Fig. 1 be the utility model method flow chart, reference picture 1
It is shown, comprise the following steps：
（1）Lateritic nickel ore is added into crushing and screening device and carries out break process, it is below -3mm, wherein 1mm to obtain granularity
The graininess lateritic nickel ore of more than the 30% of gross weight is accounted for above.
（2）Graininess lateritic nickel ore, the first reducing agent, the first additive and water are added into the first mixing device and carry out dispensing
And mixing, obtain lateritic nickel ore mixed material.
（3）Lateritic nickel ore mixed material is added into press ball device and carries out pressure ball processing, obtains the aqueous pelletizing of lateritic nickel ore.
According to some embodiments of the utility model, the step（3）In, the obtained aqueous pelletizing of lateritic nickel ore is ellipse
Shape pelletizing, pelletizing length × width x thickness are respectively 20-50mm × 15-35mm × 10-26mm；Preferably, pelletizing length × width x thickness point
Wei not 30-40mm × 22-32mm × 14-20mm；Most preferably, pelletizing length × width x thickness is respectively 33mm × 27mm × 16mm；This
Kind of grading may be such that suitable gap had both been left between pelletizing ensures heat transfer, and can make full use of the confined space ensure production capacity compared with
Greatly.
According to embodiment of the present utility model, shown in reference picture 2, the crushing and screening device includes：Broken entrance, crush
Outlet, for lateritic nickel ore to be crushed, screening process, it is below -3mm to obtain granularity, and wherein more than 1mm accounts for gross weight
More than 30% lateritic nickel ore, because lateritic nickel ore requires relatively low to reduction temperature, when granularity reaches：Below -3mm, wherein 1mm
The efficient reduction of lateritic nickel ore can be realized by accounting for more than 40% area requirement above, be not required to waste energy consumption granularity is further levigate,
And the selection of the granularity is adapted to the balling-up mode using pressure ball.
（4）The aqueous pelletizing of lateritic nickel ore is added into the first drying unit to be dried, lateritic nickel ore is obtained and dries pelletizing.
（5）Chromite is added into ore grinding device and carries out levigate processing, it is -100 mesh to obtain granularity, and accounts for the 50% of gross weight
Particulate grade chromite above.
According to some embodiments of the utility model, the part by weight of the lateritic nickel ore and chromite is according to 200 systems
Stainless steel and 300 be stainless steel to nickel, 0.8 ~ 1.6 times of the theory demands addition of chromium.
According to embodiment of the present utility model, shown in reference picture 2, the ore grinding device includes：Ore grinding entrance and ore grinding go out
Mouthful, for chromite to be carried out into levigate processing, it is -100 mesh to obtain granularity, and accounts for the chromite raw material of more than the 50% of gross weight,
The granularity is chosen to be based on from the aspect of two：One is due to ferrochrome mine disaster reduction, high to temperature requirement, and by chromite it is levigate after can
Increase the contact area of chromite and reducing agent, reduction temperature is effectively reduced, according to some embodiments of the utility model, this reality
With it is new be preferably -100 mesh account for 50%, if than the coarse size, reduction temperature need to significantly be lifted, can greatly increase energy consumption and
Financial cost, it otherwise can influence reduction effect；Second, in order to mutually be echoed with follow-up pellet forming process, and the chromite of the granularity is easy
In pelletizing, concrete reason refers to following description.
（6）By particulate grade chromite, the second reducing agent, Second addition and water add the second mixing device carry out dispensing and
Mixing, obtains chromite mixed material.
According to some embodiments of the utility model, the first reducing agent and the second reducing agent described in the utility model be coal,
One or more in semi-coke, carbon black.
（7）Chromite mixed material is added into palletizing device and carries out disk pelletizing, obtains a diameter of 8-25mm circles of rule
The aqueous pelletizing of spherical chromite so that space is left between pelletizing, is easy to conduct heat.
（8）The aqueous pelletizing of chromite is added into the second drying unit to be dried, chromite is obtained and dries pelletizing.
（9）The rotary hearth furnace reduction temperature range be 1350-1500 DEG C under conditions of, by lateritic nickel ore dry pelletizing by
First distribution device is distributed into the rotary hearth furnace, and chromite drying pelletizing is distributed into the rotary hearth furnace by the second distribution device, described
Chromite dries pelletizing on upper strata, and the lateritic nickel ore dries pelletizing in lower floor, and the pelletizing that obtains discharging after rotary hearth furnace reduction mixes
Compound.
According to some embodiments of the utility model, due in reduction process, because chromite is difficult to reduce, to reduction
Temperature requirement is high, so chromite pelletizing to be layered on to the upper strata of lateritic nickel ore pelletizing, temperature is being transferred to laterite by chromite
During nickel minerals, successively decrease layer by layer, therefore, the mode that the utility model have chosen disk pelletizing handles chromite, makes pelletizing shape
Shape is in relatively regular spherical shape（Rather than ellipse or other shapes）, and pelletizing diameter, between 8-25mm, pelletizing particle diameter is fitted
In, and size is than more uniform, without too small and excessive pelletizing, so, on the one hand, between the chromite pelletizing and pelletizing of spherical shape
Certain space can be left, and the too small pelletizing of diameter will not be crossed and fill up space；On the other hand, it is excessive diameter is not contained
Pelletizing, otherwise can it is excessive due to the diameter of pelletizing and cause pelletizing center of circle position material reduce it is insufficient.The utility model is excellent
The grading of choosing is set and the bed of material is designed with beneficial to heat from upper strata chromite pelletizing to lower floor's lateritic nickel ore pelletizing transmission, makes heat energy
It is high by cascade utilization to greatest extent, energy utilization rate.
（10）Discharging pelletizing mixture is sent into smelting apparatus and carries out high melt, obtains chromium ferronickel composite alloy, relatively
In traditional stainless steel smelting, nickel source, chromium source are provided by dilval, ferrochrome respectively, and the utility model finally gives
This new material of chromium ferronickel composite alloy, a kind of material can meet downstream stainless steel smelting to nickel source, the need in chromium source simultaneously
Ask.
Embodiment 1：Lateritic nickel ore is added into crushing and screening device and carries out break process, obtains graininess lateritic nickel ore, will
Graininess lateritic nickel ore, the first reducing agent, the first additive and water carry out using high-pressure ball press pressure ball after uniformly mixing, and pelletizing is in
The Ni grades of ellipse, wherein lateritic nickel ore are 1.1%, and lateritic nickel ore granularity is below -3mm, wherein -1mm accounts for 60%, semi-coke is solid
It is 75% to determine carbon content, and its addition is 1.1 times of theoretical amount, and the granularity of semi-coke is below -2mm, wherein -1mm accounts for 50%,
Lime stone addition is 10%；The aqueous pelletizing of lateritic nickel ore suppressed is oval, and size is 33 × 27 × 16mm, and pelletizing contains
Water rate 17%, drying and processing is carried out after being sent into dryer, obtain lateritic nickel ore of the moisture less than 2% and dry pelletizing；By chromite plus
Enter ore grinding device and carry out levigate processing, it is -100 mesh to obtain granularity, and accounts for the particulate grade chromite of more than the 50% of gross weight, will
Particulate grade chromite, coal, additive and water carry out according to a certain percentage dispensing, it is well mixed after use disc balling machine pelletizing, make
Good pelletizing a diameter of 8-18mm, the aqueous pelletizing of chromite is sent into after dryer carries out drying and processing and obtains water into spherical shape
Divide the chromite less than 3% to dry pelletizing, lateritic nickel ore drying pelletizing is distributed into rotary hearth furnace by the first distribution device, by chromite
Dry pelletizing and rotary hearth furnace is distributed into by the second distribution device, chromite dries pelletizing and is layered on upper strata, and lateritic nickel ore is dried pelletizing and is layered on
Lower floor, bed of material gross thickness are the thickness of 4 layers of pelletizing, wherein the relative weight proportions of lateritic nickel ore pelletizing and chromite pelletizing according to
200 be 1.0 times additions of the stainless steel to nickel, the theory demands addition of chromium, and the highest reduction temperature of rotary hearth furnace is 1450
DEG C, pelletizing obtains the pelletizing mixture that discharges after rotary hearth furnace reduction, and its hot feeding electric furnace is carried out into high melt obtains chromium nickel
Ferrum composite alloy, it is stainless steel that the alloy, which is used to produce 200,.
Embodiment 2：Lateritic nickel ore is added into crushing and screening device and carries out break process, it is below -3mm to obtain granularity, its
Middle more than 1mm accounts for the graininess lateritic nickel ore of more than the 30% of gross weight, and graininess lateritic nickel ore, the first reducing agent, first are added
Add agent and water to be well mixed, after obtaining lateritic nickel ore mixed material, oval pelletizing, lateritic nickel ore are pressed into ball press
Ni grades be 1.6%, the addition of coal is 1.2 times of theoretical requirement, and lime stone is added to the 8% of lateritic nickel ore weight, red
Native nickel minerals uses pressure ball mode, and the lateritic nickel ore pelletizing size after compacting is 40 × 30 × 20mm, after pelletizing carries out drying and processing
Obtain lateritic nickel ore and dry pelletizing；Chromite is added into ore grinding device and carries out levigate processing, it is -100 mesh to obtain granularity, and is accounted for total
The particulate grade chromite of more than the 70% of weight, particulate grade chromite, coal, additive and water are carried out according to a certain percentage dispensing,
Disc balling machine pelletizing, a diameter of 10-22mm of pelletizing are used after well mixed, the aqueous pelletizing of chromite made is sent into dryer and entered
Row drying and processing, obtain chromite and dry pelletizing；Lateritic nickel ore drying pelletizing is distributed into rotary hearth furnace by the first distribution device, by chromium
Iron ore dries pelletizing and is distributed into rotary hearth furnace by the second distribution device, and chromite dries pelletizing and is layered on upper strata, and lateritic nickel ore dries pelletizing
Lower floor is layered on, bed of material gross thickness is the thickness of 8 layers of pelletizing, the wherein relative weight proportions of lateritic nickel ore pelletizing and chromite pelletizing
According to 1.2 times additions of 304 stainless steels to nickel, the theory demands addition of chromium, the highest reduction temperature of rotary hearth furnace is
1480 DEG C, pelletizing obtains the pelletizing mixture that discharges after rotary hearth furnace reduction, and its hot feeding gas furnace is carried out into high melt obtains
To chromium ferronickel composite alloy, it is stainless steel that the alloy, which is used to produce 300,.
Inventor has found, according to the system of duplexing skill ball production chromium ferronickel composite alloy described in the utility model, root
According to different iron-containing resources（Lateritic nickel ore and chromite）Need this characteristic of different reduction temperatures, using double-layer cloth system and
Duplexing skill ball mode, the granularity and diameter of two kinds of raw material pelletizings are strictly controlled, realizes step of the heat energy between Different layer of the compost
Utilize, improve energy utilization rate；Meanwhile in rotary hearth furnace processing procedure, the utility model can be simultaneously to two different kinds of
Iron-containing resource is reduced, and breaches the monistic limitation of raw material；And overcome rotary hearth furnace it is inherent can only select it is thin
This drawback of bed of material cloth, rotary hearth furnace deep bed sintering cloth is realized, substantially increases rotary hearth furnace production capacity；In addition, relative to tradition
In stainless steel smelting, nickel source, chromium source are provided by dilval, ferrochrome respectively, and the utility model finally gives chromium ferronickel
This new material of composite alloy, a kind of material can meet the needs of downstream stainless steel smelting is to nickel source, chromium source simultaneously.
In the utility model, unless otherwise clearly defined and limited, the term such as term " connected ", " connection " should be done extensively
Reason and good sense solution, for example, it may be fixedly connected or be detachably connected, or integrally；Can mechanically connect, can also
It is electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be two element internals connection or
The interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned
Concrete meaning of the term in the utility model.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
Identical embodiment or example need not be directed to by stating.Moreover, specific features, structure, material or the feature of description can be
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff can be carried out the different embodiments or example and the feature of different embodiments or example described in this specification
With reference to and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification, meanwhile, for those of ordinary skill in the art, foundation
The thought of the application, in specific embodiments and applications there will be changes.
Claims (8)
- A kind of 1. system of duplexing skill ball production chromium ferronickel composite alloy, it is characterised in that including：Crushing and screening device, One mixing device, press ball device, the first drying unit；Ore grinding device, the second mixing device, palletizing device, the second drying unit, Rotary hearth furnace and smelting apparatus, wherein,Crushing and screening device, the first mixing device, press ball device and the first drying unit being sequentially connected, lateritic nickel ore is crushed Dried after screening, mixing, compacting balling-up, obtain lateritic nickel ore and dry pelletizing；Ore grinding device, the second mixing device, palletizing device and the second drying unit being sequentially connected, ferrochrome mineral aggregate is levigate, mixed Close, dried after pelletizing, obtain chromite and dry pelletizing；Rotary hearth furnace with double-layer cloth system is connected with first drying unit and the second drying unit respectively, will be described red Native nickel minerals dries pelletizing and chromite dries pelletizing layered arrangement in the rotary hearth furnace；The smelting apparatus is connected with the rotary hearth furnace, and the discharging pelletizing mixture to rotary hearth furnace carries out melting, obtains chromium ferronickel Composite alloy.
- 2. the system of duplexing skill ball production chromium ferronickel composite alloy according to claim 1, it is characterised in that described broken Broken screening plant includes：Broken entrance, broken outlet, for lateritic nickel ore to be crushed, screening process, obtain suitable particle size Lateritic nickel ore；First mixing device includes：Lateritic nickel ore entrance, the first reducing agent entrance, the first additive entrance, One water inlet and the outlet of lateritic nickel ore mixed material, the lateritic nickel ore entrance is connected with the broken outlet, for by laterite Nickel minerals, the first reducing agent, the first additive and water are mixed, and obtain lateritic nickel ore mixed material.
- 3. the system of duplexing skill ball production chromium ferronickel composite alloy according to claim 2, it is characterised in that the pressure Ball device includes：Lateritic nickel ore mixed material entrance and the aqueous pelletizing outlet of lateritic nickel ore, the lateritic nickel ore mixed material enter Mouth is connected with lateritic nickel ore mixed material outlet, for lateritic nickel ore mixed material to be carried out into pressure ball processing, obtains laterite The aqueous pelletizing of nickel minerals；First drying unit includes：The aqueous pelletizing entrance of lateritic nickel ore and lateritic nickel ore dry pelletizing outlet, The aqueous pelletizing entrance of lateritic nickel ore pelletizing outlet aqueous with the lateritic nickel ore is connected, for by the aqueous pelletizing of lateritic nickel ore Drying, obtain lateritic nickel ore and dry pelletizing.
- 4. the system of duplexing skill ball production chromium ferronickel composite alloy according to claim 3, it is characterised in that the pressure The ball-and-socket of ball device is shaped as ellipse, ball-and-socket length 20-50mm, width 15-35mm, depth 5-13mm.
- 5. the system of duplexing skill ball production chromium ferronickel composite alloy according to claim 1, it is characterised in that the mill Ore deposit device includes：Ore grinding entrance and ore grinding outlet, for chromite to be carried out into levigate processing, obtain particulate grade chromite raw material； Second mixing device includes：Chromite entrance, the second reducing agent entrance, Second addition entrance, the second water inlet and chromium Pyrite mixture material exports, and the chromite entrance and the ore grinding, which export, to be connected, for by chromite, the second reducing agent, the Two additives and water are mixed, and obtain chromite mixed material.
- 6. the system of duplexing skill ball production chromium ferronickel composite alloy according to claim 5, it is characterised in that described to make Ball device includes：Chromite mixed material entrance and the aqueous pelletizing outlet of chromite, the chromite mixed material entrance and institute State the outlet of chromite mixed material to be connected, for chromite mixed material to be carried out into disk pelletizing, obtain the chromite of spherical shape Aqueous pelletizing so that space is left between pelletizing, is easy to conduct heat；Second drying unit includes：The aqueous pelletizing of chromite enters Mouth and chromite dry pelletizing outlet, and the aqueous pelletizing entrance of the chromite pelletizing outlet aqueous with the chromite is connected, use Dried in by the aqueous pelletizing of chromite, obtain chromite and dry pelletizing.
- 7. the system of duplexing skill ball production chromium ferronickel composite alloy according to claim 1, it is characterised in that the tool The rotary hearth furnace for having double-layer cloth system includes：Rotary hearth furnace furnace chamber, ring-shaped furnace bottom and exhanst gas outlet, wherein, the ring-shaped furnace bottom can It is rotatably arranged in the rotary hearth furnace furnace chamber bottom, the rotary hearth furnace furnace chamber is divided into feed zone along its circumference, reducing zone and goes out Expect area, the first distribution device and the second distribution device, first distribution device and lateritic nickel ore are provided with positioned at the feed zone Dry pelletizing outlet to be connected, second distribution device is dried pelletizing outlet with chromite and is connected, and the discharge zone, which is provided with, turns bottom Furnace discharge device, for the discharging pelletizing mixture after reduction to be transferred out into rotary hearth furnace, wherein, first distribution device will be red Native nickel minerals dries pelletizing and is layered on lower floor, and chromite drying pelletizing is layered on upper strata by second distribution device.
- 8. the system of duplexing skill ball production chromium ferronickel composite alloy according to claim 7, it is characterised in that described molten Refining device includes：Hot pelletizing entrance, the outlet of chromium ferronickel composite alloy and slag outlet, the hot pelletizing entrance and described turn Bottom furnace discharge device is connected, and for discharging pelletizing mixture to be carried out into high melt, obtains chromium ferronickel composite alloy and clinker.
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| CN201720724719.9U CN206986219U (en) | 2017-06-21 | 2017-06-21 | A kind of system of duplexing skill ball production chromium ferronickel composite alloy |
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| CN201720724719.9U CN206986219U (en) | 2017-06-21 | 2017-06-21 | A kind of system of duplexing skill ball production chromium ferronickel composite alloy |
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