CN103540763A - Copper concentrate flash-bath composite smelting process and Outokumpu flash smelting furnace implementing process - Google Patents
Copper concentrate flash-bath composite smelting process and Outokumpu flash smelting furnace implementing process Download PDFInfo
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- CN103540763A CN103540763A CN201310479328.1A CN201310479328A CN103540763A CN 103540763 A CN103540763 A CN 103540763A CN 201310479328 A CN201310479328 A CN 201310479328A CN 103540763 A CN103540763 A CN 103540763A
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Abstract
The invention relates to a copper concentrate smelting field, and specifically relates to a copper concentrate flash-bath composite smelting process which is finished in an Outokumpu flash smelting furnace. The method comprises the steps that: S1, flash smelting raw materials are subjected to flash smelting in a reaction tower, and copper matte and slag obtained by flash smelting enter a sedimentation tank; S2, bath smelting raw materials are added into the batch, and bath smelting is carried out; when bath smelting is finished, copper matte and slag are respectively discharged from a copper matte port and a slag port. The Outokumpu flash smelting furnace comprises the reaction tower, the sedimentation tower, and a lift flue. A spray gun used for spraying the bath smelting raw material into the sedimentation tank is arranged on the upper part of the sedimentation tank. A feeding port of the spray gun communicates with a discharge port of a dry ore wind-delivery pressure tank. A feeding port of the dry ore wind-delivery pressure tank communicates with a discharge port of a raw ore bin used for storing batch smelting raw materials. The sedimentation tank is adopted as a smelting area of bath smelting. The bath smelting raw material is sprayed into the sedimentation tank for carrying out smelting, such that copper concentrate processing capacity of the Outokumpu flash smelting furnace is improved.
Description
Technical field
The present invention relates to copper ore concentrates field of smelting, be specifically related to a kind of copper ore concentrates flash-molten bath compound smelting technique and implement the Outokumpu Flash Smelting Furnace of this technique.
Background technology
Copper sulfide concentrate smelting technology comprises flash smelting and bath smelting, and flash smelting mainly contains Outokumpu flash smelting and Yin Ke flash smelting technique, and bath smelting comprises oxygen-enriched bottom-blowing technique, oxygen-enriched side-blowing, oxygen-enriched top blowing, submergence top-blown method.Outokumpu Flash Smelting Furnace is comprised of reaction tower, settling tank, rising funnel uptake three parts, copper ore concentrates is sprayed into by the concentrate burner at reaction tower top, in reaction tower, complete the generative process of oxidation reaction process and part matte, slag, in settling tank, complete the generative process of matte, slag, and carry out clarified separation.At present, the year copper ore concentrates treatment capacity of Flash Smelting Furnace has reached 1,600,000 tons, further improves the restriction that production capacity has been subject to the abilities such as concentrate metered charge system, concentrate burner, reaction tower thermal load.
Settling tank area in Outokumpu Flash Smelting Furnace is very large, the generative process of matte and slag can complete in a short period of time, matte and the slag clarified separation in settling tank also can complete in the short period of time, reach lower slag cupric, meanwhile, also can be by adding reductive agent reduction and stir and further reduce slag cupric in settling tank.Although settling tank area is very large, but in smelting process, the working strength of settling tank is very low, hearth area is not fully utilized, if can utilize settling tank to carry out bath smelting, at aspects such as Flash Smelting Furnace throughput, reduction slag cuprics, will have significant lifting.
Summary of the invention
The object of this invention is to provide a kind of copper ore concentrates flash-molten bath compound smelting technique, it can effectively improve the treatment capacity of Outokumpu Flash Smelting Furnace to copper ore concentrates.
For achieving the above object, the present invention adopts following technical scheme:
Flash-molten bath compound smelting technique, this technique completes in Outokumpu Flash Smelting Furnace, specifically comprises the following steps:
S1: flash smelting raw material is carried out in reaction tower to flash smelting, the matte that flash smelting obtains, slag enter in settling tank;
S2: add bath smelting raw material to carry out bath smelting in settling tank, bath smelting finishes respectively matte and slag to be discharged from matte mouth and cinder notch afterwards;
Flash smelting raw material by being dried copper ore concentrates, quartz sand, return dirt, oxygen-rich air and Sweet natural gas form; Bath smelting raw material by being dried copper ore concentrates, return dirt, quartz sand and coal form.
In the such scheme that the present invention adopts, mainly that the settling tank in Outokumpu Flash Smelting Furnace is utilized, place using settling tank as bath smelting, to spraying into bath smelting raw material in settling tank, carry out melting, improve Outokumpu Flash Smelting Furnace to copper ore concentrates treatment capacity, solve and cannot improve the difficult point of Outokumpu Flash Smelting Furnace treatment capacity because being subject to the capabilities limits such as concentrate metered charge system, concentrate burner, reaction tower thermal load.For example, the year treatment capacity of merely carrying out the Outokumpu Flash Smelting Furnace of flash smelting by reaction tower charging is in the past 200t, this adopts after process implementing of the present invention, can add in addition the smart copper mine of 100t year at settling tank, that is to say, adopt the technique after the present invention improves to implement, the year treatment capacity of Outokumpu Flash Smelting Furnace can reach 300t, the year treatment capacity of essence copper mine improves 50%, therefore, can significantly improve the economic benefit that copper ore concentrates is smelted.
In the present invention, the composition of flash smelting raw material and bath smelting raw material and add and can add and carry out to getting with reference to each raw material in traditional flash melting and bath smelting respectively in Outokumpu Flash Smelting Furnace.
In addition, in Outokumpu flash furnace reaction tower, the level of response of flash smelting and fusing degree are inhomogeneous, and the reaction product that falls into settling tank contains a large amount of Fe
3o
4with unreacted sulfide completely, and a small amount of raw material, there is cross reaction, most of Fe after mixing in these reaction product in settling tank
3o
4by unreacted completely sulfide and raw material reduce, and with quartzy flux slag making, heat release also discharges SO
2gas; The Fe that also has part not to be reduced
3o
4and Cu
2o, need to follow-uply add iron block to reduce and slag making, thereby realize, reduces slag cupric and Fe
3o
4content.
And in the present invention, by air or oxygen-rich air, in settling tank, spraying into bath smelting raw material, the air by a high speed or oxygen-rich air, by the stirring of melt fierceness, make the product of reaction tower carry out better heat transmission, make the Fe falling from reaction tower
3o
4with unreacted sulfide contact reacts fully completely, accelerated oxidation reduction process; Meanwhile, the stirring of melt is involved in bath smelting raw material in settling tank in melt, for bath smelting provides melting environment and place, makes bath smelting raw material carry out fast bath smelting.Coal in bath smelting raw material is both as fuel, the heat of supplementation with copper concentrate reaction, and again as reductive agent, reduction Fe
3o
4and Cu
2o, improves the mobility of slag, accelerates the clarified separation with matte, reduces slag cupric.Thereby solve when reaction tower reaction condition is undesired excessive Fe
3o
4the appearance of reaction tower below raw material heap will be caused with raw material, or slag is containing Fe
3o
4too high and poor fluidity, matte-slag cannot clarified separation etc. a difficult problem.
The present invention preferably specifically implements according to following operation, to obtain better effect:
Bath smelting raw material is obtained according to following weight ratio preparation by each component: quartz sand: dry copper ore concentrates=9～12:100, returns dirt: (quartz sand+dry copper ore concentrates)=8～15:100, coal: quartz=5～10:100.
Smart copper mine, quartz sand and return dirt and prepare according to mass ratio 100:14～16:7～9 in flash smelting raw material are 65～75% left and right containing oxygen in oxygen-rich air; Sweet natural gas, oxygen-rich air are sprayed into by fuel nozzle, smart copper mine, quartz sand and return dirt and sprayed into by concentrate burner, and the temperature of the melt in settling tank is about 1210～1250 ℃.
Bath smelting raw material is 130～150m/s through the speed of air or oxygen-rich air injection.
While implementing such scheme in Outokumpu Flash Smelting Furnace, can carry out some to its Outokumpu Flash Smelting Furnace and improve, that is, as follows:
This Outokumpu Flash Smelting Furnace comprises reaction tower, settling tank, funnel uptake, the top of settling tank is provided with for spray the spray gun of bath smelting raw material in settling tank, the feeding mouth of spray gun is connected and is connected with the discharge port of dry ore deposit wind-force transfer pressure tank, and the feeding mouth of dry ore deposit wind-force transfer pressure tank is connected and is connected with the discharge port that stores the siccative ore storage bin of bath smelting raw material.
Described spray gun is arranged on settling tank top and is positioned at the side near reaction tower, and spray gun discharge port is 300～500mm apart from the spacing of melt liquid level in settling tank.Spray gun is provided with two rows, and every row's spray gun is respectively along arranging perpendicular to the even interval of melt flow direction in settling tank, and the spray gun between two rows is interleaved shape and arranges.
Accompanying drawing explanation
Fig. 1 is for implementing the structural representation of the Outokumpu Flash Smelting Furnace of copper ore concentrates flash-molten bath compound smelting technique;
Fig. 2 is the vertical view of Fig. 1.
Embodiment
The preparation of the system that is metered into of the Proper Design of Outokumpu flash furnace reaction tower 11, solid materials preparation as shown in Figure 1,, concentrate burner design, fuel gun etc. all keeps original design of flash smelting constant; The copper ore concentrates that reaction tower 11 is processed, return the solid materialss such as dirt, flux and treatment capacity constant; The technology controlling and process mode of thermal equilibrium, material balance is constant.
Copper ore concentrates in flash smelting residence time in reaction tower 11 is very short, and according to result of study, the peroxidation of part copper concentrate generates Fe
3o
4oxygen debtization of part copper concentrate, small part copper ore concentrates is not oxidized, be green state and fall into settling tank 12, peroxidation concentrate particle with owe oxidic concentrate particle and a small amount of raw material settling tank 12 below reaction tower 11 in mix, redox reaction occurs, and peroxidation particle is reduced by oxygen debtization and raw material, makes Fe
3o
4content reduces, the one-step desulfurization of going forward side by side.In normergic situation in reaction tower 11, from reaction tower 11, drop to the Fe of settling tank 12 bath surfaces
3o
4, can there is redox reaction in raw material, under-oxidized concentrate, make raw material oxidizing fusion alternately, makes Fe
3o
4content is reduced to lower level, makes the oxidation of under-oxidized material, and the balance of the amount of reaching and produce uniform melt there will not be the accumulation of raw material, also there will not be Fe
3o
4high dry slag layer.But, if reaction condition worsens in reaction tower 11, just there will be raw material heap, in slag, there is thicker dry slag layer, slag mobility variation, matte slag separation difficulty causes slag cupric to raise, a large amount of raw material enter fume exhaust system, cause dust rate to raise, the technology troubles such as fume exhaust system obstruction.
The Outokumpu Flash Smelting Furnace of implementing copper ore concentrates flash-molten bath compound smelting technique in the present invention comprises reaction tower 11, settling tank 12, funnel uptake 13, the top of settling tank 12 is provided with for the spray gun 14 to the interior injection bath smelting of settling tank 12 raw material, the feeding mouth of spray gun 14 is connected and is connected with the discharge port of dry ore deposit wind-force transfer pressure tank 15, the feeding mouth of dry ore deposit wind-force transfer pressure tank 15 is connected and is connected with the discharge port that stores the siccative ore storage bin 16 of bath smelting raw material, spray gun 14 is above settling tank 12, near reaction tower 11 1 sides, be provided with two rows, every row's spray gun 14 is respectively along arranging perpendicular to the even interval of the interior melt flow direction of settling tank 12, spray gun 14 between two rows is interleaved shape and arranges, concrete as Fig. 1, shown in 2.During operation, form flash smelting raw material dry copper ore concentrates, quartz sand, return dirt, oxygen-rich air is sprayed into by concentrate burner, gas fuel is passed into by burner, and flash smelting raw material carries out flash smelting in reaction tower 11, and the matte that flash smelting obtains, slag fall in the settling tank 12 of bottom; Start siccative ore storage bin 16, dry ore deposit wind-force transfer pressure tank 15 and spray gun 14, near the spray gun 14 of reaction tower 11 1 side settings, to spraying into bath smelting raw material in the interior melt of settling tank 12, carry out bath smelting like this, after bath smelting finishes, matte and slag carry out clarified separation fast, the slag of bath surface is discharged settling tank 12 by overflow, carries out slow cooling-ore dressing and processes, or enter electric dilution, the blowing of flash converting furnace is sent in matte shrend, or with steamed stuffed bun, sends into PS and bessemerize.Each component of bath smelting raw material that in the present invention, spray gun 14 sprays can obtain according to following weight ratio preparation: quartz sand: dry copper ore concentrates=9～12:100, returns dirt: quartz sand+dry copper ore concentrates=8～15:100, coal: quartzy=5～10.By, the two-way melting raw material that adds carries out flash smelting and bath smelting respectively in the reaction tower 11 of Outokumpu Flash Smelting Furnace and settling tank 12, and the settling tank of Outokumpu Flash Smelting Furnace is further utilized, improve the treatment capacity of Outokumpu Flash Smelting Furnace, improve the smelting benefit of copper ore concentrates.
In the present invention, with air or oxygen-rich air, to bath surface, spray bath smelting raw material at a high speed and carry out bath smelting.Bath smelting raw material mixes with high speed oxygen-rich air in spray gun 14, sprays at high speed the surface of below settling tank 12 interior melts together with oxygen-rich air, forms fierce stirring area in melt.The melt stirring has formed gas-slag-matte foam and milk sap with oxygen-rich air, the bath smelting raw material spraying into, under high temperature, strong oxidizing atmosphere, there is rapidly the melting reactions such as thermolysis, oxidation, fusing in bath smelting raw material, complete slag making, the process of the copper that manufactures ice, and produce SO2 flue gas and a small amount of flue dust.Due to stirring of melt fierceness, and gas-slag-matte foam and milk sap have been formed, heat, mass transfer between copper ore concentrates and melt and oxygen-rich air are very fast, bath smelting reaction can complete in a short period of time, the matte generating, slag melt flow to the cinder notch direction of funnel uptake 13 sides, leave behind the Melt Stirring district under spray gun 14, at the rear portion of settling tank 12, carry out clarified separation.
As shown in Figure 1, 2, can 6～10 wind-material high-speed spray guns 14 be installed on settling tank 12 tops in reaction tower 11 exits, spray gun 14 arranges two rows and enters in settling tank 12 from settling tank 12 tip cuttings, and spray gun 14 discharge ports are 300～500mm apart from the spacing of settling tank 12 interior bath surfaces.Every spray gun 14 consists of two concentric tubes through furnace roof, diameter of inner pipe 5cm, outer tube diameter 10cm, outer tube is apart from melt face 300～500mm, inner tube is on furnace roof or furnace roof, forming the concentrate of bath smelting raw material and quartz sand is dried to and is moisturely less than 1%, concentrate and quartz sand are delivered to the dry ore bunker 16 of furnace roof, with coal, return dirt etc. and add together dry ore deposit wind-force transfer pressure tank 15, with wind-force, carry and use pneumatic feeding device to add the inner tube of spray gun 14, in inner tube outlet, mix with high speed oxygen-rich air, speed with 130～150m/s sprays to bath surface, stir consumingly melt, complete bath smelting raw material to the cloth of settling tank 12.
In the compound smelting technique of flash-molten bath provided by the invention, bath smelting in flash smelting in reaction tower 11 and settling tank 12 is that matte grade, temperature and the slag composition with same target independently carries out respectively technology controlling and process, thermal equilibrium and the mass balance of carrying out respectively are separately calculated, and control respectively separately copper ore concentrates charging capacity, oxygen-enriched blasting amount, oxygen-rich concentration and fuel quantity.
Due to the below melt high degree of agitation of spray gun 14 in settling tank 12, the furnace bottom of spray gun 14 belows does not have the generation of furnace accretion, and furnace bottom need to increase the thickness of refractory brick.Meanwhile, owing to carrying out bath smelting in settling tank 12, the thermal load of settling tank 12 increases, and particularly near thermal load spray gun 14 increases, and therefore, need to improve near the design of spray gun 14 furnace bindings, increases cooling copper water jacket, strengthens body of heater cooling.
Use technology utilization Outokumpu Flash Smelting Furnace provided by the invention to smelt smart copper mine, can improve significantly the year treatment capacity of copper ore concentrates, approximately improve 40～50%, therefore, can improve significantly the economic benefit that copper ore concentrates is smelted, simultaneously, compound by flash smelting, bath smelting, improve the mobility of slag after melting, accelerate the clarified separation with matte, reduce slag cupric.
Claims (8)
1. copper ore concentrates flash-molten bath compound smelting technique, this technique completes in Outokumpu Flash Smelting Furnace, specifically comprises the following steps:
S1: flash smelting raw material is carried out to flash smelting in reaction tower (11), and the matte that flash smelting obtains, slag enter in settling tank (12);
S2: add bath smelting raw material to carry out bath smelting in settling tank (12), bath smelting finishes respectively matte and slag to be discharged from matte mouth and cinder notch afterwards;
Flash smelting raw material by being dried copper ore concentrates, quartz sand, return dirt, oxygen-rich air and Sweet natural gas form; Bath smelting raw material by being dried copper ore concentrates, return dirt, quartz sand and coal form.
2. copper ore concentrates as claimed in claim 1 flash-molten bath compound smelting technique, is characterized in that: bath smelting raw material sprays in settling tank (12) through air or oxygen-rich air.
3. copper ore concentrates as claimed in claim 1 flash-molten bath compound smelting technique, it is characterized in that, bath smelting raw material is obtained according to following weight ratio preparation by each component: quartz sand: dry copper ore concentrates=9～12:100, return dirt: (quartz sand+dry copper ore concentrates)=8～15:100, coal: quartz=5～10:100.
4. copper ore concentrates as claimed in claim 1 flash-molten bath compound smelting technique, is characterized in that, smart copper mine, quartz sand and return dirt and prepare according to mass ratio 100:14～16:7～9 in flash smelting raw material.
5. copper ore concentrates as claimed in claim 1 flash-molten bath compound smelting technique, is characterized in that: bath smelting raw material is 130～150m/s through the speed of air or oxygen-rich air injection.
6. one kind for implementing the claims the Outokumpu Flash Smelting Furnace of copper ore concentrates flash-molten bath compound smelting technique described in 1, comprise reaction tower (11), settling tank (12), funnel uptake (13), the top of settling tank (12) is provided with for spray the spray gun (14) of bath smelting raw material in settling tank (12), the feeding mouth of spray gun (14) is connected and is connected with the discharge port of dry ore deposit wind-force transfer pressure tank (15), and the feeding mouth of dry ore deposit wind-force transfer pressure tank (15) is connected and is connected with the discharge port that stores the siccative ore storage bin (16) of bath smelting raw material.
7. implement as claimed in claim 6 the Outokumpu Flash Smelting Furnace of copper ore concentrates flash-molten bath compound smelting technique, it is characterized in that: described spray gun (14) is arranged on the top of settling tank (12) and is positioned at the side near reaction tower (11), and spray gun (14) discharge port is 300～500mm apart from the spacing of the interior melt liquid level of settling tank (12).
8. implement as claimed in claim 6 the Outokumpu Flash Smelting Furnace of copper ore concentrates flash-molten bath compound smelting technique, it is characterized in that: spray gun (14) is arranged with two rows in parallel, every row's spray gun (14) is respectively along arranging perpendicular to the even interval of the interior melt flow direction of settling tank (12), and the spray gun (14) between two rows is interleaved shape and arranges.
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| CN2012103966931 | 2012-10-18 | ||
| CN2012103966931A CN102876902A (en) | 2012-10-18 | 2012-10-18 | Method for composite smelting of copper concentrate flash-molten bath and outokumpu flash furnace |
| CN201210396693.1 | 2012-10-18 | ||
| CN201310479328.1A CN103540763B (en) | 2012-10-18 | 2013-10-14 | Copper concentrate flash-bath composite smelting process and Outokumpu flash smelting furnace implementing process |
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| CN201310479328.1A Active CN103540763B (en) | 2012-10-18 | 2013-10-14 | Copper concentrate flash-bath composite smelting process and Outokumpu flash smelting furnace implementing process |
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Cited By (4)
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| CN106048253A (en) * | 2016-07-27 | 2016-10-26 | 中国恩菲工程技术有限公司 | Copper smelting equipment |
| CN106048252A (en) * | 2016-07-27 | 2016-10-26 | 中国恩菲工程技术有限公司 | Copper smelting equipment |
| CN109266866A (en) * | 2017-08-30 | 2019-01-25 | 铜陵有色金属集团股份有限公司金冠铜业分公司 | Copper concentrate bath smelting technique |
| CN109468469A (en) * | 2019-01-16 | 2019-03-15 | 杭州电子科技大学 | A kind of device and method of composite gas blowing carbon reducing and smelting copper ashes |
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| CN103834752B (en) * | 2014-03-04 | 2015-04-08 | 北京科技大学 | Thermal-state slag online modification device |
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| CN106048253A (en) * | 2016-07-27 | 2016-10-26 | 中国恩菲工程技术有限公司 | Copper smelting equipment |
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| CN109266866A (en) * | 2017-08-30 | 2019-01-25 | 铜陵有色金属集团股份有限公司金冠铜业分公司 | Copper concentrate bath smelting technique |
| CN109468469A (en) * | 2019-01-16 | 2019-03-15 | 杭州电子科技大学 | A kind of device and method of composite gas blowing carbon reducing and smelting copper ashes |
Also Published As
| Publication number | Publication date |
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| CN103540763B (en) | 2015-07-01 |
| CN102876902A (en) | 2013-01-16 |
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Effective date of registration: 20190410 Address after: 244100 West Building of Changjiang West Road Nonferrous Courtyard, Tongling City, Anhui Province Patentee after: Tongling Nonferrous Metals Group Co., Ltd. Address before: 244000 Tongling Nonferrous Circular Economy Industrial Park, Tongling City, Anhui Province Patentee before: JINGUAN COPPER INDUSTRY BRANCH OF TONGLING NONFERROUS METALS GROUP HOLDING CO., LTD. |