CN205635723U - System for handle metallurgical sediment - Google Patents

System for handle metallurgical sediment Download PDF

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Publication number
CN205635723U
CN205635723U CN201620367145.XU CN201620367145U CN205635723U CN 205635723 U CN205635723 U CN 205635723U CN 201620367145 U CN201620367145 U CN 201620367145U CN 205635723 U CN205635723 U CN 205635723U
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China
Prior art keywords
roasting
entrance
reduction
outlet
oxidizing
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CN201620367145.XU
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Chinese (zh)
Inventor
王敏
吴道洪
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Jiangsu Province Metallurgical Design Institute Co Ltd
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Jiangsu Province Metallurgical Design Institute Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The utility model discloses a system for handle metallurgical sediment, include: a mixing arrangement, a forming device, oxidizing roasting device, breaker, the 2nd mixing arrangement, the 2nd forming device, reducing roasting device and ore grinding magnetic separation device, a forming device and a mixture outlet link to each other, the oxidizing roasting device has first material pelletizing entry, first exhanst gas outlet and the export of oxidizing roasting result, and first material pelletizing entry links to each other with the export of first material pelletizing, breaker links to each other with the the first oxidative roasted product export, the 2nd mixing arrangement links to each other with breaker, the 2nd forming device and the 2nd mixture outlet link to each other, the reducing roasting device has second material pelletizing entry, second exhanst gas outlet, the export of reducing roasting result, and second material pelletizing entry links to each other with the 2nd forming device, ore grinding magnetic separation device links to each other with the export of reducing roasting result. Adopt this system to solve the difficult reductive problem of fayalite in the metallurgical sediment, be favorable to obtaining high -quality low -sulfur metal iron powder.

Description

Process the system of metallurgical slag
Technical field
This utility model belongs to metallurgy industry technical field, particularly to a kind of system processing metallurgical slag.
Background technology
In the prior art, along with society and expanding economy, non-ferrous metal yield and consumption figure are also increasing day by day.Adjoint The smelting process of nonferrous metal product, substantial amounts of metallurgical slag and mine tailing are also discharged.These metallurgical slags pass through mostly The high-temperature molten-state slag that pyrometallurgical smelting obtains, metallurgical slag shrend can be down to room temperature to reclaim valuable element therein by some Rear broken use chemical agent carries out flotation, finally gives smelted furnace cinder ore dressing tailings.In these metallurgical slags and ore dressing tailings one As possibly together with 35~55wt% ferrum, mainly exist mutually with fayalite.Utilize difficulty relatively big, greatly due to metallurgical slag and tailings Measuring to store up form existence, not only land occupation, heavy metal ion therein also can penetrate into pollution environment in soil;The opposing party Face, also result in huge waste to resource.In the modern society that various mineral resources reduce day by day, how to realize money The effective recycling in source becomes the emphasis of research.
In nonferrous metallurgy slag, the dominant of ferrum is fayalite (Fe mutually2SiO4), it is difficult to reduction.Can by analysis-reduction thermodynamics Knowing, the reduction temperature of metallurgical slag is higher than common iron ore reduction temperature, and the requirement to reducing atmosphere is higher.In addition, ferrum The fusing point of olivine is low causes metallurgical slag fusing point to be about 1200 DEG C.When carbonaceous pelletizing is when more than 1200 DEG C of reduction, and metallurgical slag melts Change and make reduction coal be layered with slag, be degrading reacting dynamics condition;When reaction temperature is higher, such as more than 1450 DEG C, then belong to In melting and reducing, although can reduce, but energy consumption is the highest;If reduction temperature is less than metallurgical slag fusing point, although pelletizing is not Fusing, metallurgical slag is fully contacted with reduction coal, but fayalite difficult reduction again, reduction rate is slow, reduces the most thorough.
Additionally, nonferrous metallurgy slag contains the sulfur of 0.5%-1.5%, reduction coal contains the sulfur of > 0.5%, in reduction process The sulfur major part that two kinds of raw materials are brought into enters in metallized pellet, can only remove small part sulfur, make iron powder during mill choosing Sulfur content is up to more than 0.5%, higher than the requirement to conversion pig, unfavorable to follow-up steelmaking process, if increasing desulfurization process, Then improve production cost.
Utility model content
One of technical problem that this utility model is intended to solve in correlation technique the most to a certain extent.To this end, this practicality is new One purpose of type is to propose a kind of to produce the process smelting of high-quality low-sulfur metal iron powder by fayalite in reduction metallurgical slag The system of gold slag.
To this end, according to an aspect of the present utility model, the utility model proposes a kind of system processing metallurgical slag, described System is adapted for carrying out the method for foregoing process metallurgical slag, and described system includes:
First mixing arrangement, described first mixing arrangement has metallurgical slag entrance, limestone entrance, binding agent entrance and first Mixed material exports;
First shaped device, described first shaped device has the first compound entrance and the first material pelletizing exports, and described first Compound entrance is connected with described first compound outlet;
Oxidizing roasting device, described oxidizing roasting device has the first material pelletizing entrance, the first exhanst gas outlet and oxidizing roasting Product exit, described first material pelletizing entrance is connected with described first material pelletizing outlet;
Breaker, described breaker is connected with described first oxidizing roasting product exit;
Second mixing arrangement, described second mixing arrangement has oxidizing roasting product inlet, reduction coal entrance, binding agent entrance With the second compound outlet, described oxidizing roasting product inlet is connected with described breaker;
Second shaped device, described second shaped device has the second compound entrance and an outlet of the second material pelletizing, and described the Two compound entrances and the outlet of the second compound are connected;
Reduction roasting device, described reduction roasting device has the second material pelletizing entrance, the second exhanst gas outlet, reduction roasting Product exit, described second material pelletizing entrance is connected with described second material pelletizing outlet;And
Mill ore magnetic selection device, described mill ore magnetic selection device has reduction roasting product inlet, metal iron powder outlet and tailings outlet, Described reduction roasting product inlet is connected with described reduction roasting product exit.
In this utility model, described first shaped device and described second shaped device are balling disk (-sc).
In this utility model, described oxidizing roasting device is the rotary hearth furnace with oxidizing atmosphere.
In this utility model, described reduction roasting device is the rotary hearth furnace with reducing atmosphere.
Accompanying drawing explanation
Fig. 1 is the structural representation of the system processing metallurgical slag according to one embodiment of this utility model.
Fig. 2 is the method flow utilizing the system processing metallurgical slag of one embodiment of this utility model to process metallurgical slag Figure.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached The embodiment that figure describes is exemplary, it is intended to be used for explaining this utility model, and it is not intended that to limit of the present utility model System.
According to an aspect of the present utility model, the utility model proposes a kind of system processing metallurgical slag, according to this practicality Novel specific embodiment, describes the system processing metallurgical slag of this utility model specific embodiment in detail below with reference to Fig. 1.
The system processing metallurgical slag according to this utility model specific embodiment includes: first mixing arrangement the 10, first molding dress Put 20, oxidizing roasting device 30, breaker the 40, second mixing arrangement the 50, second shaped device 60, reduction roasting dress Put 70 and mill ore magnetic selection device 80.
Wherein, the first mixing arrangement 10 has metallurgical slag entrance 11, limestone entrance 12, binding agent entrance 13 and first and mixes Close material outlet 14;
First shaped device 20 has the first compound entrance 21 and the first material pelletizing outlet 22, described first compound entrance 21 are connected with described first compound outlet 14;
Described oxidizing roasting device 30 has first material pelletizing entrance the 31, first exhanst gas outlet 32 and oxidizing roasting product goes out Mouth 33, described first material pelletizing entrance 31 is connected with described first material pelletizing outlet 14;
Described breaker 40 is connected with described first oxidizing roasting product exit 33;
Described second mixing arrangement 50 has oxidizing roasting product inlet 51, reduction coal entrance 52, binding agent entrance 53 and Two compound outlets 54, described oxidizing roasting product inlet 51 is connected with described breaker 40;
Described second shaped device 60 has the second compound entrance 61 and the second material pelletizing outlet 62, described second mixing Material entrance 61 is connected with the second compound outlet 54;
Described reduction roasting device 70 has second material pelletizing entrance the 71, second exhanst gas outlet 72, reduction roasting product goes out Mouth 73, described second material pelletizing entrance 71 is connected with described second material pelletizing outlet 62;And
Described mill ore magnetic selection device 80 has reduction roasting product inlet 81, metal iron powder outlet 82 and tailings outlet 83, institute State reduction roasting product inlet 81 to be connected with described reduction roasting product exit 73.
This system first passes through oxidizing roasting device and destroys fayalite structure, generates the ferrum oxide of easily reduction, makes oxygen in roasting Change ferrum particle aggregation, provide advantage for subsequent reactions, the sulfur that removing metallurgical slag is brought into the most effectively;Enter one The sulfur that the ferrum oxide reduction reduction coal of second time removing simultaneously is brought into by step ground by reduction roasting device, uses pulverizing grinder to select mode Ferrum element in metallurgical slag is effectively separated, obtains the low-sulfur metal iron powder of high-quality.Thus use and system solves the problem smelting In gold slag, problem and the ferrum element of the reduction of fayalite difficulty are difficult to the difficult problem assembled, the method using two step desulfurization, exist respectively The element sulphur that oxidizing roasting stage and reduction roasting stage removing metallurgical slag and reduction coal bring into, and then it is rich to obtain high-grade low-sulfur Ferrous metal iron powder, the recycling that improve metallurgical slag is worth.
According to specific embodiment of the utility model, described first shaped device 20 and described second shaped device 60 are pelletizing Dish.Thus can improve balling efficiency further.
According to specific embodiment of the utility model, described oxidizing roasting device 30 is the rotary hearth furnace with oxidizing atmosphere.According to Specific embodiment of the utility model, the temperature that the oxidizing roasting carried out in above-mentioned oxidizing roasting device 30 processes is 700-950 Degree Celsius.Thus under this oxidizing temperature, in metallurgical slag, fayalite is destructurized, produces the ferrum oxide being prone to reduction, roasting Ferrum particle aggregation in burning, provides advantage for subsequent reactions.Meanwhile, limestone reacts with the sulfur in metallurgical slag, enters Row one-step desulfurization, alleviates the desulfurization load of subsequent process.
According to specific embodiment of the utility model, the time that the oxidizing roasting carried out in above-mentioned oxidizing roasting device 30 processes is 20-50 minute.The time that thus oxidizing roasting processes is to complete fayalite oxidation reaction in metallurgical slag in 20-50 minute, enters And generate the ferric oxide particles that ferrum is assembled.Meanwhile, the oxidizing roasting time is to be conducive in limestone and metallurgical slag for 20-50 minute Sulfur react, the sulfur in one-step removal metallurgical slag, alleviate the desulfurization load of subsequent process.
According to specific embodiment of the utility model, described reduction roasting device 70 is the rotary hearth furnace with reducing atmosphere.According to Specific embodiment of the utility model, the temperature that the reduction roasting carried out in above-mentioned reduction roasting device 70 processes is 1100-1300 Degree Celsius.The ferrum oxide thus oxidizing roasting obtained under this reduction temperature reacts production ferrum simple substance further with reduction coal, The reaction of Salmon-Saxl simultaneously brought into by calcium hydroxide and reduction coal, carries out two step desulfurization, is conducive to producing the low-sulfur metallic iron of high-quality Powder.
According to specific embodiment of the utility model, the time that the reduction roasting carried out in above-mentioned reduction roasting device 70 processes is 20-40 minute.The time that thus reduction roasting processes is the abundant reaction be conducive between ferrum oxide and reduction coal for 20-40 minute Generate fe, ensure that two step desulphurization reactions between calcium hydroxide and reduction coal simultaneously, generate the low-sulfur metallic iron of high-quality Powder.
Understand the system processing metallurgical slag of this utility model specific embodiment for convenience, below utilization is embodied as The system processing metallurgical slag of example processes the method for metallurgical slag and is described in detail.
The method processing metallurgical slag of this utility model specific embodiment is described below with reference to Fig. 2.
The method processing metallurgical slag according to this utility model specific embodiment includes: by described metallurgical slag and limestone with glue Knot agent carries out the first forming processes, in order to obtain the first material pelletizing;Described first material pelletizing is carried out oxidizing roasting process, To make the fayalite in described metallurgical slag transfer ferrum oxide to, removing sulfur simultaneously, and obtaining oxidizing roasting product;By described Oxidizing roasting product carries out break process, in order to obtain the oxidizing roasting product crushed;By described broken oxidizing roasting product The second forming processes is carried out, in order to obtain the second material pelletizing with reduction coal, binding agent and water;By described second material pelletizing Carry out reduction roasting process, in order to make the ferrum oxide in described second material pelletizing be converted into ferrum, remove sulfur simultaneously, and obtain Reduction roasting product;And described reduction roasting product is carried out mill ore magnetic selection process, in order to obtain metal iron powder and tailings.
The method first passes through oxidizing roasting and destroys fayalite structure, generates the ferrum oxide of easily reduction, makes ferrum oxide in roasting Particle aggregation, provides advantage for subsequent reactions, the sulfur that removing metallurgical slag is brought into the most effectively;Further The sulfur brought into by the ferrum oxide reduction reduction coal of second time removing simultaneously by reduction roasting, uses pulverizing grinder to select mode by metallurgical slag Middle ferrum element is effectively separated, and obtains the low-sulfur metal iron powder of high-quality.Thus use and this method solve ferrum in metallurgical slag The problem of olivine difficulty reduction and ferrum element are difficult to the difficult problem assembled, and the method using two step desulfurization, respectively in oxidizing roasting The element sulphur that stage and reduction roasting stage removing metallurgical slag and reduction coal bring into, and then obtain high-quality low-sulfur richness ferrous metal ferrum Powder, the recycling that improve metallurgical slag is worth.
According to specific embodiment of the utility model, by above-mentioned metallurgical slag and limestone and binding agent according to 70-90:10-20: 5-10 mass ratio carries out described first forming processes.Thus, it is possible to the removal efficiency of sulfur in raising metallurgical slag, improve oxidizing roasting Treatment effeciency.
According to specific embodiment of the utility model, the mean diameter of above-mentioned broken pelletizing is not more than 2 millimeters.Thus will be broken Pelletizing mean diameter controls to be conducive to being fully contacted between ferric oxide particles and reduction coal below 2 millimeters, and then promotes oxygen Between change ferrum and reduction coal, reduction reaction is fully carried out.Inventor finds that the particle diameter of broken pelletizing is excessive, in these process conditions Inside it is not easy to reduction reaction fully carry out, and then needs higher temperature or longer response time to complete this reduction reaction, Consume a large amount of energy consumption too much, increase production cost;Inventor finds that the particle diameter of broken pelletizing is not more than 2 millimeters, can protect Card reduction reaction is fully carried out, it is not necessary to too much increase production technology or production cost.
According to specific embodiment of the utility model, by above-mentioned broken pelletizing with reduction coal, binding agent according to 55-80:15-40: 5-10 mass ratio carries out described second forming processes.Thus, it is possible to significantly improve the treatment effeciency of reduction roasting.
According to specific embodiment of the utility model, in above-mentioned second molding process, the addition of described water is described broken The 5-10% of the gross mass of broken pelletizing, reduction coal and binding agent.In described second molding process, thus add water favourable Reacted by the calcium oxide of decomposition of limestone during oxidizing roasting and produce calcium hydroxide, and then beneficially calcium hydroxide and reduction The reaction of Salmon-Saxl that ribbing enters, carries out two step desulfurization, the sulfur that removing reduction coal is brought into, it is simple to produce the low-sulfur metal iron powder of high-quality.
Below with reference to specific embodiment, this utility model is described, it should be noted that these embodiments are only retouched The property stated, and limit this utility model never in any form.
Embodiment 1
Certain smelts copper ashes, and its composition is: TFe 41.52%, Cu 0.36%, S 0.35%.Reduction coal fixed carbon 72%, S 0.32%. In copper ashes: limestone: the ratio of binding agent=100:18:10 mixes, mixed material carries out pelletizing process.Pelletizing dries Oxidizing roasting, sintering temperature 850 DEG C, roasting time 25 minutes is carried out after Gan.Pelletizing S content 0.02% after roasting.By ball Group is crushed to below-2mm, in copper ashes after roasting: reduction coal: binding agent: the ratio of water=100:25:5:10 is mixed Combined pressure ball, pelletizing carries out reduction roasting, sintering temperature 1200 DEG C, roasting time 40 minutes after drying.Pelletizing after roasting Carry out mill ore magnetic selection after water quenching cooling, finally give the metal iron powder of TFe92.89%, S content 0.021% in iron powder.
Embodiment 2
Certain smelts copper ashes, and its composition is: TFe 41.52%, Cu 0.36%, S 0.35%.Reduction coal fixed carbon 72%, S 0.32%. In copper ashes: limestone: the ratio of binding agent=100:15:10 mixes, mixed material carries out pelletizing process.Pelletizing dries Oxidizing roasting, sintering temperature 850 DEG C, roasting time 25 minutes is carried out after Gan.Pelletizing S content 0.027% after roasting.By ball Group is crushed to below-2mm, in copper ashes after roasting: reduction coal: binding agent: the ratio of water=100:25:5:10 is mixed Combined pressure ball, pelletizing carries out reduction roasting, sintering temperature 1200 DEG C, roasting time 40 minutes after drying.Pelletizing after roasting Carry out mill ore magnetic selection after water quenching cooling, finally give the metal iron powder of TFe92.03%, S content 0.030% in iron powder.
Embodiment 3
Certain smelts copper ashes, and its composition is: TFe 41.52%, Cu 0.36%, S 0.35%.Reduction coal fixed carbon 72%, S 0.32%. In copper ashes: limestone: the ratio of binding agent=100:15:10 mixes, mixed material carries out pelletizing process.Pelletizing dries Oxidizing roasting, sintering temperature 900 DEG C, roasting time 20 minutes is carried out after Gan.Pelletizing S content 0.022% after roasting.By ball Group is crushed to below-2mm, in copper ashes after roasting: reduction coal: binding agent: the ratio of water=100:25:5:10 is mixed Combined pressure ball, pelletizing carries out reduction roasting, sintering temperature 1300 DEG C, roasting time 25 minutes after drying.Pelletizing after roasting Carry out mill ore magnetic selection after water quenching cooling, finally give the metal iron powder of TFe93.14%, S content 0.021% in iron powder.
Embodiment 4
Certain smelts nickel slag, and its composition is: TFe 43.22%, S 0.95%.Reduction coal fixed carbon 72%, S 0.32%.By nickel Slag: limestone: the ratio of binding agent=100:18:10 mixes, mixed material carries out pelletizing process.After pelletizing is dried Carry out oxidizing roasting, sintering temperature 900 DEG C, roasting time 20 minutes.Pelletizing S content 0.035% after roasting.Pelletizing is broken It is broken to below-2mm, in copper ashes after roasting: reduction coal: binding agent: the ratio of water=100:30:5:10 carries out mixing pressure Ball, pelletizing carries out reduction roasting, sintering temperature 1300 DEG C, roasting time 25 minutes after drying.Pelletizing shrend after roasting Carry out mill ore magnetic selection after cooling, finally give the metal iron powder of TFe93.55%, S content 0.029% in iron powder.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or The implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or hidden One or more this feature are included containing ground.In description of the present utility model, " multiple " be meant that two or two with On, unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or integral;Can be It is mechanically connected, it is also possible to be electrical connection;Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two The connection of individual element internal or the interaction relationship of two elements.For the ordinary skill in the art, Ke Yigen Above-mentioned term concrete meaning in this utility model is understood according to concrete condition.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ", Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes It is contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, this area The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by technical staff Close and combination.
Although above it has been shown and described that embodiment of the present utility model, it is to be understood that above-described embodiment is example Property, it is impossible to being interpreted as restriction of the present utility model, those of ordinary skill in the art can in the range of this utility model Above-described embodiment be changed, revise, to replace and modification.

Claims (4)

1. the system processing metallurgical slag, it is characterised in that including:
First mixing arrangement, described first mixing arrangement has metallurgical slag entrance, limestone entrance, binding agent entrance and first Mixed material exports;
First shaped device, described first shaped device has the first compound entrance and the first material pelletizing exports, and described first Compound entrance with and described first compound outlet be connected;
Oxidizing roasting device, described oxidizing roasting device has the first material pelletizing entrance, the first exhanst gas outlet and oxidizing roasting Product exit, described first material pelletizing entrance is connected with described first material pelletizing outlet;
Breaker, described breaker is connected with described first oxidizing roasting product exit;
Second mixing arrangement, described second mixing arrangement has oxidizing roasting product inlet, reduction coal entrance, binding agent entrance With the second compound outlet, described oxidizing roasting product inlet is connected with described breaker;
Second shaped device, described second shaped device has the second compound entrance and an outlet of the second material pelletizing, and described the Two compound entrances and the outlet of the second compound are connected;
Reduction roasting device, described reduction roasting device has the second material pelletizing entrance, the second exhanst gas outlet, reduction roasting Product exit, described second material pelletizing entrance is connected with described second material pelletizing outlet;And
Mill ore magnetic selection device, described mill ore magnetic selection device has reduction roasting product inlet, metal iron powder outlet and tailings outlet, Described reduction roasting product inlet is connected with described reduction roasting product exit.
System the most according to claim 1, it is characterised in that described first shaped device and described second shaped device For balling disk (-sc).
System the most according to claim 1, it is characterised in that described oxidizing roasting device is to have turning of oxidizing atmosphere End stove.
System the most according to claim 1, it is characterised in that described reduction roasting device is to have turning of reducing atmosphere End stove.
CN201620367145.XU 2016-04-27 2016-04-27 System for handle metallurgical sediment Expired - Fee Related CN205635723U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106967878A (en) * 2017-04-18 2017-07-21 江苏省冶金设计院有限公司 A kind of preparation system and preparation method for sintering chromite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106967878A (en) * 2017-04-18 2017-07-21 江苏省冶金设计院有限公司 A kind of preparation system and preparation method for sintering chromite

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