CN103540763B - 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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- CN103540763B CN103540763B CN201310479328.1A CN201310479328A CN103540763B CN 103540763 B CN103540763 B CN 103540763B CN 201310479328 A CN201310479328 A CN 201310479328A CN 103540763 B CN103540763 B CN 103540763B
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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 made up of reaction tower, settling tank, rising funnel uptake three part, copper ore concentrates is sprayed into by the concentrate burner at reaction tower top, the generative process of oxidation reaction process and part matte, slag is completed in reaction tower, 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 reaches 1,600,000 tons, improves the restriction that production capacity has been subject to the abilities such as concentrate dosing system, concentrate burner, reaction tower thermal load further.
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 Copper in Slag, meanwhile, also Copper in Slag is reduced further by adding reductive agent reduction and stir in settling tank.Although settling tank area is very large, but the working strength of settling tank is very low in smelting process, hearth area is not fully utilized, if settling tank can be utilized to carry out bath smelting, then will have significant lifting in Flash Smelting Furnace throughput, reduction slag cupric etc.
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 effectively can 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:
A kind of 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 flash smelting in reaction tower, the matte that flash smelting obtains, slag enter in settling tank;
S2: add bath smelting raw material and carry out bath smelting in settling tank, bath smelting terminates matte and slag to be discharged from matte mouth and cinder notch respectively afterwards;
Flash smelting raw material by dry copper ore concentrates, quartz sand, return dirt, oxygen-rich air and Sweet natural gas and form; Bath smelting raw material by dry copper ore concentrates, return dirt, quartz sand and coal and form.
In the such scheme that the present invention adopts, mainly the settling tank in Outokumpu Flash Smelting Furnace is utilized, using the place of settling tank as bath smelting, in settling tank, spray into bath smelting raw material carry out melting, improving Outokumpu Flash Smelting Furnace to copper ore concentrates treatment capacity, solving the difficult point that cannot improve Outokumpu Flash Smelting Furnace treatment capacity because being subject to the capabilities limits such as concentrate dosing system, concentrate burner, reaction tower thermal load.Such as, simple year treatment capacity of being carried out the Outokumpu Flash Smelting Furnace of flash smelting by reaction tower charging was 200t in the past, after this employing present invention process is implemented, can at the smart copper mine adding 100t settling tank other year, in other words, the technique after adopting the present invention to improve is implemented, 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, in Outokumpu Flash Smelting Furnace flash smelting raw material and bath smelting raw material composition and add to add with reference to each raw material in traditional flash melting and bath smelting respectively and carry out to getting.
In addition, level of response and the fusing degree of flash smelting in Outokumpu flash furnace reaction tower are uneven, fall into the reaction product of settling tank containing a large amount of Fe
3o
4with unreacted sulfide completely, and a small amount of raw material, in settling tank, there is cross reaction, most of Fe after the mixing of these reaction product
3o
4by unreacted completely sulfide and raw material reduce, and with quartzy flux slag making, heat release also discharges SO
2gas; Also has the Fe that part is not reduced
3o
4and Cu
2o, needs the follow-up iron block that adds to carry out reduction and slag making, thus realizes reducing Copper in Slag and Fe
3o
4content.
And in the present invention, in settling tank, spray into bath smelting raw material by air or oxygen-rich air, by air at a high speed or oxygen-rich air by the stirring of melt fierceness, make the product of reaction tower carry out heat trnasfer better, make the Fe fallen from reaction tower
3o
4with unreacted sulfide contact reacts fully completely, accelerated oxidation reduction process; Meanwhile, bath smelting raw material is involved in settling tank in melt by the stirring of melt, for bath smelting provides melting environment and place, makes bath smelting raw material carry out bath smelting fast.Coal in bath smelting raw material both as fuel, supplementation with copper concentrate reaction heat, again as reductive agent, reduction Fe
3o
4and Cu
2o, improves the mobility of slag, accelerates the clarified separation with matte, reduces Copper in Slag.Thus solve when reaction tower reaction condition is abnormal, excessive Fe
3o
4the appearance of raw material heap below reaction tower will be caused with raw material, or slag is containing Fe
3o
4too high and poor fluidity, matte-slag cannot the difficult problems such as clarified separation.
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 sand=5 ~ 10:100.
Copper ore concentrates, quartz sand and return dirt and prepare according to mass ratio 100:14 ~ 16:7 ~ 9 in flash smelting raw material are about 65 ~ 75% containing oxygen in oxygen-rich air; Sweet natural gas, oxygen-rich air are sprayed into by fuel nozzle, copper ore concentrates, quartz sand and return dirt and sprayed into by concentrate burner, and the temperature of the melt in settling tank is about 1210 ~ 1250 DEG C.
The speed that bath smelting raw material sprays through air or oxygen-rich air is 130 ~ 150m/s.
When implementing such scheme in Outokumpu Flash Smelting Furnace, can be carried 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 the spray gun for spraying bath smelting raw material in settling tank, the feeding mouth of spray gun is connected with the discharge port of dry ore deposit wind model pressure-pot and is connected, and the feeding mouth of dry ore deposit wind model pressure-pot is connected with the discharge port of the siccative ore storage bin storing bath smelting raw material and is connected.
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, often arranges spray gun and arranges along perpendicular to melt flow direction uniform intervals in settling tank respectively, and the spray gun between two rows is that interleaved shape is arranged.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Outokumpu Flash Smelting Furnace implementing copper ore concentrates flash-molten bath compound smelting technique;
Fig. 2 is the vertical view of Fig. 1.
Embodiment
As shown in Figure 1, the preparation etc. of the system that the is metered into preparation of the Proper Design of Outokumpu flash furnace reaction tower 11, solid materials, concentrate burner design, fuel gun all keeps original design of flash smelting constant; Reaction tower 11 process copper ore concentrates, return the solid materials 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
4part copper concentrate oxygen debtization, small part copper ore concentrates is not oxidized, settling tank 12 is fallen in green state, peroxidation concentrate particle mixes in the settling tank 12 below reaction tower 11 with deficient oxidic concentrate particle and a small amount of raw material, redox reaction occurs, and peroxidation particle is reduced by oxygen debtization and raw material, makes Fe
3o
4content reduces, 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 surface
3o
4, redox reaction can be there is alternately in raw material, under-oxidized concentrate, make raw material oxidizing fusion, make Fe
3o
4content is reduced to lower level, and under-oxidized material is oxidized, 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, have thicker dry slag layer in slag, slag mobility is deteriorated, and matte slag separation difficulty causes Copper in Slag 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 blocking.
The Outokumpu Flash Smelting Furnace 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 the spray gun 14 for spraying bath smelting raw material in settling tank 12, the feeding mouth of spray gun 14 is connected with the discharge port of dry ore deposit wind model pressure-pot 15 and is connected, the feeding mouth of dry ore deposit wind model pressure-pot 15 is connected with the discharge port of the siccative ore storage bin 16 storing bath smelting raw material and is connected, spray gun 14 is above settling tank 12, reaction tower 11 side is provided with two rows, often arrange spray gun 14 to arrange along perpendicular to melt flow direction uniform intervals in settling tank 12 respectively, spray gun 14 between two rows is arranged in interleaved shape, concrete as Fig. 1, shown in 2.During operation, form dry copper ore concentrates, the quartz sand of flash smelting raw material, 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 model pressure-pot 15 and spray gun 14, the spray gun 14 arranged near reaction tower 11 side like this sprays into bath smelting raw material and carries out bath smelting in melt in settling tank 12, after bath smelting terminates, matte and slag carry out clarified separation fast, the slag of bath surface discharges settling tank 12 by overflow, carries out slow cooling-ore dressing process, or enters electric dilution, matte shrend send flash converting furnace to blow, or bessemerizes with steamed stuffed bun feeding PS.The bath smelting feed components 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: quartz sand=5 ~ 10.Pass through, two-wayly add melting raw material, in the reaction tower 11 and settling tank 12 of Outokumpu Flash Smelting Furnace, carry out flash smelting and bath smelting respectively, the settling tank of Outokumpu Flash Smelting Furnace is utilized further, improve the treatment capacity of Outokumpu Flash Smelting Furnace, improve the smelting benefit of copper ore concentrates.
Spray bath smelting raw material to bath surface at a high speed with air or oxygen-rich air in the present invention and carry out bath smelting.Bath smelting raw material mixes with high speed oxygen-rich air in spray gun 14, sprays to the surface of melt in the settling tank 12 of below at high speed, form fierce stirring area in the melt together with oxygen-rich air.The melt stirred defines gas-slag-matte foam and milk sap with the oxygen-rich air sprayed into, bath smelting raw material, there is rapidly the melting reactions such as thermolysis, oxidation, fusing in bath smelting raw material under high temperature, strong oxidizing atmosphere, complete slag making, the process of the copper that manufactures ice, and produce SO
2flue gas and a small amount of flue dust.Due to stirring of melt fierceness, and define gas-slag-matte foam and milk sap, copper ore concentrates and the heat between melt and oxygen-rich air, mass transfer are very fast, bath smelting reaction can complete in a short period of time, the matte generated, slag melt flow to the cinder notch direction of funnel uptake 13 side, after leaving the Melt Stirring district under spray gun 14, carry out clarified separation at the rear portion of settling tank 12.
As shown in Figure 1, 2, installation 6 ~ 10 wind-material high-speed spray gun 14 can be pushed up at the settling tank 12 in reaction tower 11 exit, spray gun 14 arranges two rows and enters in settling tank 12 from settling tank 12 tip cutting, and in spray gun 14 discharge port distance settling tank 12, the spacing of bath surface is 300 ~ 500mm.Every root spray gun 14 is made up of the concentric tube that two are passed furnace roof, diameter of inner pipe 5cm, outer tube diameter 10cm, outer tube is apart from melt face 300 ~ 500mm, interior pipe is on furnace roof or furnace roof, form the concentrate of bath smelting raw material and quartz sand to be dried to and to be 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 dry ore deposit wind model pressure-pot 15 together, add in spray gun 14 with wind model and with pneumatic feeding device and manage, mix with high speed oxygen-rich air at inner tube outlet, bath surface is sprayed to the speed of 130 ~ 150m/s, stir melt consumingly, complete the cloth of bath smelting raw material to settling tank 12.
In flash provided by the invention-molten bath compound smelting technique, bath smelting in flash smelting in reaction tower 11 and settling tank 12 independently carries out technology controlling and process with the discard slag with copper of same target, temperature and slag composition, carry out respective thermal equilibrium and mass balance calculation$ respectively, control copper ore concentrates charging capacity, oxygen-enriched blasting amount, oxygen-rich concentration and fuel quantity respectively separately.
Due to the below melt high degree of agitation of spray gun 14 in settling tank 12, the furnace bottom below spray gun 14 does not have the generation of furnace accretion, and furnace bottom needs the thickness increasing refractory brick.Meanwhile, owing to carrying out bath smelting in settling tank 12, the thermal load of settling tank 12 increases, and the thermal load particularly near spray gun 14 increases, and therefore, needs the design improving furnace binding near spray gun 14, increases cooling copper water jacket, strengthen body of heater cooling.
Technology utilization Outokumpu Flash Smelting Furnace provided by the invention is used to smelt smart copper mine, the year treatment capacity of copper ore concentrates can be improved significantly, about improve 40 ~ 50%, therefore, the economic benefit that copper ore concentrates is smelted can be improved significantly, simultaneously, by the compound of flash smelting, bath smelting, improve the mobility of slag after melting, accelerate the clarified separation with matte, reduce Copper in Slag.
Claims (5)
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 flash smelting in reaction tower (11), the matte that flash smelting obtains, slag enter in settling tank (12);
S2: add bath smelting raw material and carry out bath smelting in settling tank (12), bath smelting terminates matte and slag to be discharged from matte mouth and cinder notch respectively afterwards;
Flash smelting raw material by dry copper ore concentrates, quartz sand, return dirt, oxygen-rich air and Sweet natural gas and form; Bath smelting raw material by dry copper ore concentrates, return dirt, quartz sand and coal and form;
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 sand=5 ~ 10:100;
Copper ore concentrates, quartz sand and return dirt and prepare according to mass ratio 100:14 ~ 16:7 ~ 9 in flash smelting raw material;
Described Outokumpu Flash Smelting Furnace comprises reaction tower (11), settling tank (12), funnel uptake (13), the top of settling tank (12) is provided with the spray gun (14) for spraying bath smelting raw material in settling tank (12), the feeding mouth of spray gun (14) is connected with the discharge port of dry ore deposit wind model pressure-pot (15) and is connected, and the feeding mouth in dry ore deposit wind model pressure-pot (15) is connected with the discharge port of the siccative ore storage bin (16) storing bath smelting raw material and is connected.
2. copper ore concentrates flash-molten bath compound smelting technique as claimed in claim 1, is characterized in that: bath smelting raw material is through oxygen-rich air and sprays in settling tank (12).
3. copper ore concentrates flash-molten bath compound smelting technique as claimed in claim 2, is characterized in that: bath smelting raw material is 130 ~ 150m/s through the speed that oxygen-rich air sprays.
4. copper ore concentrates flash-molten bath compound smelting technique as claimed in claim 1, it is characterized in that: described spray gun (14) is arranged on the top of settling tank (12) and the side be positioned near reaction tower (11), and spray gun (14) discharge port is 300 ~ 500mm apart from the spacing of settling tank (12) interior melt liquid level.
5. copper ore concentrates flash-molten bath compound smelting technique as claimed in claim 1, it is characterized in that: spray gun (14) is arranged with two rows in parallel, often arrange spray gun (14) to arrange along perpendicular to settling tank (12) interior melt flow direction uniform intervals respectively, the spray gun (14) between two rows is arranged in interleaved shape.
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| CN201210396693.1 | 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 |
| 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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| CN103834752B (en) * | 2014-03-04 | 2015-04-08 | 北京科技大学 | Thermal-state slag online modification device |
| CN104561587B (en) * | 2015-01-20 | 2017-01-18 | 铜陵有色金属集团股份有限公司金冠铜业分公司 | Concentrate jet nozzle of smelting furnace |
| CN104928492A (en) * | 2015-06-15 | 2015-09-23 | 中国瑞林工程技术有限公司 | Flash side-blowing smelting device and flash side-blowing smelting method |
| CN104880073B (en) * | 2015-06-23 | 2016-11-23 | 邹镇 | An a kind of step meltblown smelting device |
| 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 |
| CN109468469B (en) * | 2019-01-16 | 2020-07-24 | 杭州电子科技大学 | Device and method for reducing molten copper slag by blowing carbon through composite gas |
| CN110396606A (en) * | 2019-09-05 | 2019-11-01 | 天津闪速炼铁技术有限公司 | A kind of flash metallurgy gas package integral supply system and method for mixing |
| CN115367777A (en) * | 2022-10-02 | 2022-11-22 | 吕文广 | Preparation method of battery-grade lithium carbonate |
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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. |