CN102586620B - Refining grate for smelting miscellaneous copper and smelting method thereof - Google Patents
Refining grate for smelting miscellaneous copper and smelting method thereof Download PDFInfo
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- CN102586620B CN102586620B CN201210060435.6A CN201210060435A CN102586620B CN 102586620 B CN102586620 B CN 102586620B CN 201210060435 A CN201210060435 A CN 201210060435A CN 102586620 B CN102586620 B CN 102586620B
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Abstract
The invention relates to a refining grate for smelting miscellaneous copper and a smelting method thereof. The refining grate comprises a furnace body, a driving device, an oxygen-rich burner, an air brick system and a flue gas treatment system, wherein the furnace body is of a special-shaped horizontal cylinder arranged on the driving device, and the driving device comprises a support part comprising a hydraulic oil cylinder, a hydraulic station and a control system thereof and a hydraulic driving part; the oxygen-rich burner is inserted into the refining grate from the end wall of the refining grate, and the air brick system comprises an air brick body mounted on a bottom plate of the refining grate and a control system; and the flue gas treatment system comprises a waste heat boiler, a plate type flue gas cooler, a cloth bag dust collector, a smoke exhaust fan, a chimney and an annular smoke collection and exhaust system. By adopting the refining grate, energy consumption can be reduced, more operation cost can be saved, and the refining grate is further conductive to reducing the oxygen content in anode copper, reducing scab, enlarging an interface between slag and a melt, effectively removing harmful non-metallic elements and shortening operation time.
Description
one, technical field
The present invention relates to nonferrous metallurgical equipment technical field, particularly a kind of refining grate of smelting composition brass.
two, background technology
Adopt tilting type metallurgical furnace to smelt the mode shortcomings such as the same industry is very general, and its technical equipment is uneven, and ubiquity energy consumption is high, exhaust emissions exceeds standard, water resources unit consumption is large of composition brass at home and abroad.
three, summary of the invention
The object of this invention is to provide a kind of refining grate of smelting composition brass, adopt this refining grate can reduce energy expenditure, save more process cost, be conducive to reduce the oxygen level of anode copper, the interface that reduces furnace accretion, expansion slag and melt, the harmful non-metallic element of effective removal and shorten the activity duration.
The present invention takes following technical scheme to achieve the above object: a kind of refining grate of smelting composition brass, is made up of body of heater, drive unit and oxygen enrichment burner, gas permeable brick system and smoke processing system.Described body of heater is a special-shaped horizontal cylinder, and this body drop of refining grate is placed on drive unit; Drive unit is by converter body support parts and contain hydraulic ram, and the hydraulic driving part composition of Hydraulic Station and composition of the control system thereof is flexible by hydraulic actuating fluid compressing cylinder, to reach the object of the refining grate that verts; Oxygen enrichment burner inserts refining grate from refining grate headwall, and gas permeable brick system is by the air brick body and the composition of the control system that are arranged on refining grate base plate; Smoke processing system is made up of waste heat boiler, plate type flue gas cooler, bagroom, smoke exhaust fan, chimney and ring collection fume exhaust system.Flue gas is discharged and is entered smoke processing system from refining grate headwall opposite side.
Refining grate body of heater is a special-shaped horizontal cylinder, and base plate and upper cover plate are arc, and wall is vertical wall, inner lining refractory block, and body of heater specification: internal diameter × interior length=12000 × 5000mm, produces anode copper nominal capacity: 360t/ stove.
Oxygen enrichment burner is long 1.3 meters, and the inner sleeve that the outer tube that external diameter is 130 millimeters and external diameter are 98 millimeters is combined into, and inner tube is led to oxygen, and outer tube leads to Sweet natural gas.
Gas permeable brick system is by 8 air brick body and composition of the control systems that are installed on refining grate base plate, blast nitrogen from every gas permeable brick bottom, 30～120 liters/min of nitrogen flows, nitrogen blasts copper melts for increasing the mass-and heat-transfer in refining grate, accelerates copper material melting and oxidation, reduction rate.
Smoke processing system is made up of waste heat boiler, plate type flue gas cooler, bagroom, smoke exhaust fan, chimney and ring collection fume exhaust system, the flue gas of discharging from refining grate, and flow is 28500 Nm
3/ h, 1200 ℃ of temperature, maximum dust content 50g/Nm
3, after smoke processing system purifying treatment, flue-gas temperature drops to 130 ℃, dustiness 0.05g/Nm
3, emptying by chimney.
Refining grate principle of work and the process of smelting composition brass of the present invention:
Composition brass is smelted working process and is divided into: reinforced fusing, oxidation, reduction, 4 sessions of casting.Composition brass raw material and sludging flux quartzite and Wingdale, after adding in the lump in body of heater by two charging door of refining grate, under efficient oxygen enrichment burner heat supply, material rapid melting intensification in stove, refining grate verts and be blown into pressure 6.5kg/cm by being arranged in the stainless steel open tube that 6 diameters of charging door opposite side are 22mm to refining operation angle
2, flow 3000 Nm
3the pressurized air of/h is oxidized operation as oxygenant, makes the impurity in composition brass form slag, and refining grate verts and discharge the slag oxidation end of job from cleanout door to deslagging angle, starts to enter reduction period; Refining grate verts again to refining angle, is to be equally blown into pressure 3.5kg/cm in these 6 diameters stainless steel open tube that is 22mm
2, flow 1500 Nm
3the CH of/h
4≤ 92% Sweet natural gas carries out restore job as reductive agent, after restore job finishes, produces qualified anode copper.Anode copper is through being cast into qualified positive plate power transmission solution wet-process refining, and slag is further processed recovery copper wherein, and flue gas enters waste heat boiler recovery waste heat, and finally by crossing, the processing of gathering dust is emptying.Under reinforced, fusing, oxidation, reduction, 5 sessions states of casting, gas permeable brick system, according to different job states, is controlled respectively 8 nitrogen flows 30～120 liters/min of variations, accelerates the speed of each sessions, saves the activity duration.
The basic chemical equation of oxidation stage: [Cu
2o]+[Me]=2[Cu]+[MeO]
The basic chemical equation of reduction phase: Cu
2o+ CO=2Cu+ CO
2
A smelting process that is suitable for the refining grate of described smelting composition brass, comprises the steps:
The reinforced fusion stage: furnace charge adds in batches, reinforced and fusing time 12 hours altogether, reinforced fusion stage refining grate is driven body of heater is verted to 0 ° of state, i.e. horizontal mid-way by drive unit.
Composition brass raw material is outsourcing, and refining grate is processed the more than 90% composition brass raw material of average cupric, and composition brass material average assay is in table one;
Table one composition brass material average assay
| Cu（%） | Fe（%） | Sn（%） | Pb（%） | Zn（%） | Ni（%） |
| 90 | 0.6 | 0.1 | 0.64 | 1.3 | 0.5 |
| ? | As（%） | Sb（%） | Bi（%） | Au（%） | Ag（%） |
| ? | 0.05 | 0.055 | 0.017 | 0.00027 | 0.0268 |
Raw material physical property: be all solid.Wherein, wire: diameter is not from less than 1mm to 20mm etc.; Copper part: different shape, differs in size.
The reinforced stage is accompanied by material melting process, and the In Crystal Solid Copper material adding is constantly fusing in stove, and by 2 charging door, charging machine constantly adds copper material and slag former quartzite and Wingdale,
Adopt O
2the oxygen enrichment natural gas combustion nozzle burning of concentration > 90%, Sweet natural gas is introduced from burner center, after combustion-supporting oxygen and air are pre-mixed, penetrate with Sweet natural gas high-speed jet and form strong shearing, stretching, stirring action from the rotation of burner nozzle, form a stable burning recirculation zone, in this region, fuel combustion produces cracking, generates carbon granules and the hydrocarbon mixture of high radiation.Burner main body flame, along with the momentum of mixed gas is expanded outward, further mixes, and carries out secondary firing, has completed whole combustion processes.
The composition of each main subsidiary material refers to table two.
Table two: flux chemical composition and the granularities such as Wingdale
| Title | SiO 2 | CaO | Other | Fe | Granularity |
| Quartz sand | ﹥90 | ? | 8 | ﹤2.0 | <20mm |
| Wingdale | 1.3 | 54.0 | 44.5 | 0.2 | <20mm |
Reinforced fusion stage single oxygen enrichment burner gas discharge is controlled at 400～800(Max) Nm
3/ h, oxygen flow 400～800Nm
3/ h, combustion air flow: 2000～8000(Max) Nm
3/ h, enters stove material and adds 320 tons of weight to stop feeding in raw material, and in the time that the whole temperature of fusion of material reach 1130 ℃, enters oxidation stage.
1, oxidation stage: oxidization time 6 hours, oxidation stage refining grate is driven body of heater is verted to 17 ° of states, i.e. refining side position by drive unit.Pressurized air immerses copper melts below 300mm by being distributed in the stainless steel open tube that 6 diameters of body of heater side are 22mm, is blown into pressure 6.5kg/cm
2, flow 3000 Nm
3the pressurized air of/h is oxidized operation as oxygenant, and constantly oxidized along with impurity reacts output slag and float on copper liquid surface with slag former.After oxidation finishes, body of heater is verted to deslagging position, the slag that floats on copper liquid surface is drained only.Oxidation stage finishes rear copper liquid temperature and reaches 1180 ℃.
2, reduction phase: 2 hours recovery times, reduction phase refining grate is driven body of heater is verted to 17 ° of states, i.e. refining side position by drive unit.Sweet natural gas immerses copper melts below 300mm by being distributed in the stainless steel open tube that 6 diameters of body of heater side are 22mm, is blown into pressure 3.5kg/cm
2, flow 1500 Nm
3the Sweet natural gas of/h carries out restore job as reductive agent, along with the Cu in copper liquid
2o is constantly reduced, and finally generates elemental copper.After reduction finishes, body of heater is verted to casting position, start to carry out casting operation.Reduction phase finishes rear copper liquid temperature and reaches 1220 ℃.
3, fume exhaust system: approximately 8～50g/ Nm of the dust-laden of refining grate output
3, the flue gas of 1200 ℃ of left and right of temperature, produces steam through waste heat boiler recovery waste heat, and meanwhile, in flue gas, the flue dust of being with also settles down in a large number; The flue gas that waste heat boiler is discharged enters plate type flue gas cooler, after plate type flue gas cooler cools, mix with the environment flue gas of approximately 80 ℃ of set of circumstances cigarette systems, flue-gas temperature is further reduced, mixed flue gas enters bagroom and purifies, and is down to 50mg/ Nm from bagroom dust contained flue gas concentration out
3below, then flue gas converges and enters chimney and discharge.
Outstanding advantages of the present invention is:
1, adopt O
2the oxygen enrichment natural gas combustion nozzle burning of concentration > 90%, the pressure-losses of burner is lower than conventional burner, can reduce to greatest extent energy expenditure, saves more process cost.In burner control process, along with load variations and processing requirement, oxygen, fuel and air flow quantity can be carried out ratio adjusting, finally reach ideal mixing and the burning of fuel and excess of oxygen.Make burning more abundant, be conducive to save energy and improve efficiency of combustion, reduce the discharge of harmful ingredients in flue gas, accelerate raw material burn-off rate.
2, add gas permeable brick system in refining grate bottom, its effect be the nitrogen that continues to provide between grate operational period to stove in copper liquid be similar to the stirring of fountain shape, be conducive to reduce anode copper oxygen level, reduce furnace accretion, expand the interface of slag and melt, more effectively remove harmful non-metallic element and shorten the activity duration.
3, approximately 8～50g/ Nm of the dust-laden of refining grate output
3, the flue gas of 1200 ℃ of left and right of temperature, final flue gas of discharging reaches discharging standards, GB 9078-1996 " industrial furnace atmosphere pollutants emission standards " secondary standard.
four, accompanying drawing explanation
Fig. 1 is the structural representation of the refining grate of smelting composition brass of the present invention.
In figure, be labeled as: body of heater 1, airduct 2, copper outlet 3, oxygen enrichment burner 4, gas permeable brick 5, exhanst gas outlet 6, slag notch 7 and charging opening 8.
Fig. 2 is the structural representation of drive unit of the present invention.
In figure, be labeled as: body of heater 1, hydraulic ram 9, Hydraulic Station 10 and Controlling System 11 thereof and converter body support parts 12 form.
Fig. 3 is the oxygen enrichment nozzle structure schematic diagram of the refining grate of smelting composition brass of the present invention.
In figure, be labeled as: outer tube 21, inner sleeve 22.
Fig. 4 is the fume exhaust system layout diagram of the refining grate of smelting composition brass of the present invention.
In figure, be labeled as: afterheat boiler system 18, ring collection fume exhaust system 19, plate type flue gas cooler 13,, cyclone 14, bagroom 15, smoke exhaust fan 16, chimney 17.
five, embodiment
By drawings and Examples, technical scheme of the present invention is described further below.
As shown in Figures 1 to 4, the refining grate of smelting composition brass of the present invention, formed by body of heater, drive unit and oxygen enrichment burner, gas permeable brick system and smoke processing system, described body of heater is one to be placed in the special-shaped horizontal cylinder 1 on converter body support parts 12, drive unit is by containing hydraulic ram 9, and Hydraulic Station 10 and Controlling System 11 thereof and converter body support parts 12 form; Oxygen enrichment burner is by leading to the outer tube 21 of Sweet natural gas and the inner sleeve 22 of logical oxygen forms, and oxygen enrichment burner inserts refining grate from refining grate headwall, and gas permeable brick system is made up of the air brick body 5 and the Controlling System 20 that are arranged on refining grate base plate; Smoke processing system is made up of waste heat boiler 18, plate type flue gas cooler 13, cyclone 14, bagroom 15, smoke exhaust fan 16, chimney 17 and ring collection fume exhaust system 19.
Refining grate body of heater is a special-shaped horizontal cylinder, refers to that the base plate of body of heater and upper cover plate are arc, and wall is vertical wall, inner lining refractory block.Oxygen enrichment burner 4 is long 1.3 meters, the inner sleeve 22 that the outer tube 21 that external diameter is 130 millimeters and external diameter are 98 millimeters forms, and inner sleeve leads to oxygen, and outer tube leads to Sweet natural gas, oxygen enrichment burner 4 inserts in stove from the right-side wall of refining grate body of heater 1, provides thermal source by natural gas oxygen-enriched burning for grate refining.Eight air brick bodies 5 of gas permeable brick system 21 are distributed in refining grate bottom, according to different job states, control respectively the nitrogen flow of gas permeable brick system 30～120 liters/min of variations by Controlling System 20.The essential structure that above refining grate body of heater 1, oxygen enrichment burner 4, air brick body 5 form grate is seated above the converter body support parts 12 of drive unit, drive unit is by containing hydraulic ram 9, and Hydraulic Station 10 and Controlling System 11 thereof and converter body support parts 12 form; Flexible by hydraulic actuating fluid compressing cylinder 9, to reach the object of the refining grate that verts.
Sweet natural gas produces a large amount of high-temperature flue gas refining grate body of heater 1 is interior after sufficient burning, flue-gas temperature exceedes 1200 ℃, maximum dust content 50g/Nm3, first flue gas enters the waste heat boiler 18 of smoke processing system by the smoke outlet 6 of body of heater 1, flue gas absorbs heat output steam through waste heat boiler 18, flue dust also obtains certain enrichment, is deposited in the heavy dirt chamber of waste heat boiler 18.Then enter plate type flue gas cooler 13 from waste heat boiler 18 flue gas out, plate type flue gas cooler 13 adopts the further cooled flue gas temperature of the mode of mechanical air blast and sedimentation flue dust, flue gas enters bagroom 15 from plate type flue gas cooler 13 out, the working mechanism of bagroom 15 is that ash-laden gas passes through filtering material, grit is filtered, filtering material trapping coarse dust is mainly by inertial impaction effect, trapping grain dust is mainly by diffusion and sieving action, the flue gas maximum dust content further trapping after flue dust by bagroom 15 has dropped to 0.05g/Nm
3, after smoke exhaust fan 16, passing through the outer row of chimney 17.The flue gas that ring collection fume exhaust system 19 traps is the flue gas emitting from charging door 8, cleanout door 7 and the copper outlet 3 of refining grate 1, temperature is about 80 ℃, the flue gas exporting with plate type flue gas cooler 13 after cyclone 14 is collected flue dust is mixed into bagroom 15, passes through the outer row of chimney 17 after smoke exhaust fan 16 again.
embodiment 2
The smelting process of the refining grate of smelting composition brass of the present invention, comprises the steps:
Reinforced fusion stage operation steps:
13.7 hours consuming time of reinforced fusing, adds 312.8 tons of composition brasses altogether, adds 6.3 tons of quartzites, 1.1 tons, lime, 4.1 tons of the pig iron;
Add the average composition of composition brass to see the following form three:
Table three:
| Containing Cu(%) | Ag(g/t) | As(%) | Bi(%) | Sn(%) | Pb(%) | Ni(%) | Sb(%) |
| 91.63 | 286 | 3.31 | 2.96 | 9.59 | 9.58 | 4.14 | 1.10 |
Reinforced process body of heater is placed in 0 ° of level attitude and adopts charging vehicle reinforced from two charging door in batches, and quartzite, Wingdale added in the reinforced later stage.Natural gas oxygen-enriched burner consumes natural gas amount 7535 Nm
3, oxygen consumed tolerance 6978 Nm
3, between reinforced melting period, control in stove negative pressure at-30Pa～-40Pa, fusing finishes 1130 ℃ of actual measurement copper liquid temperatures.
Oxidation stage operation steps:
Oxidation stage continues 5.4 hours.Cleaning oxidation airduct, confirms that 6 airducts are unimpeded, opens air-supply main valve, regulates pneumavalve aperture standard-sized sheet, confirms that oxidation air flow reaches 3000 Nm
3/ h, pressure 6.5kg/cm
2and after stable, refining grate is verted to 17 °, it is refining side position, oxidation pressurized air immerses copper melts below 300mm by being distributed in the stainless steel open tube that 6 diameters of body of heater side are 22mm, stirs copper solutions, starts to be oxidized operation, between oxidation period, control in stove negative pressure at-20Pa～-30Pa, oxidation stage monitoring oxidation air flow, occurs fluctuating and processes in time, and final oxidation end relies on operative employee to get oxidation sample artificial judgment and is as the criterion.Refining grate is verted to 0 °, close oxidation wind, wait to drive a vehicle empty cinder ladle is placed under slag notch, open the fire door of slagging tap, the body of heater that verts verts to deslagging side direction, pours out the oxidation sludge on copper liquid surface, 39 tons of this heat deslagging, and oxidation finishes 1189 ℃ of rear copper liquid temperatures.Natural gas oxygen-enriched burner consumes natural gas amount 3143 Nm
3, oxygen consumed tolerance 2895 Nm
3, consume oxidation air capacity 17394 Nm
3.
Oxidation sludge sample ingredient is in table four,
Table four:
| Cu(%) | Au(g/t) | Ag(g/t) | Zn(%) | Fe(%) | Ni(%) | SiO2(%) | Sn(%) | Al2O3(%) |
| 20.27 | 0.4 | 12 | 0.99 | 24.41 | 0.23 | 22.05 | 1.45 | 1.85 |
Reduction phase operation steps:
Reduction phase continues 2.1 hours.Cleaning reduction airduct, confirms that 6 airducts are unimpeded, opens and send Sweet natural gas main valve, regulates pneumavalve aperture standard-sized sheet, confirms that reduction gas discharge reaches 1500 Nm
3/ h, pressure 3.5kg/cm
2and after stable, refining grate is verted to 17 °, it is refining side position, also raw natural gas immerses copper melts below 300mm by being distributed in the stainless steel open tube that 6 diameters of body of heater side are 22mm, stirs copper solutions, starts restore job, between reduction period, control in stove negative pressure at-10Pa～+ 10Pa, reduction phase monitoring reduction gas discharge, occurs fluctuating and processes in time, and final reduction end relies on operative employee to get also former state artificial judgment and is as the criterion.Refining grate is verted to 0 °, close and go back raw natural gas, oxidation finishes 1228 ℃ of rear copper liquid temperatures.Consume reduction natural gas amount 3274 Nm
3.
Reduction anode copper sample ingredient is in table five.
Table five reduces anode copper sample ingredient
| Cu(%) | Au(g/t) | Ag(g/t) | Zn(%) | Fe(%) | Ni(%) | Pb(%) | Sn(%) | 0(%) |
| 99.29 | 0.8 | 12 | 0.0024 | 0.0025 | 0.14 | 0.016 | 0.023 | 0.13 |
Add and start to amount to consuming time to the qualified anode copper of output from raw material: 21.2 hours, gas permeable brick system consumption nitrogen 11m
3.
The smelting process of the refining grate of smelting composition brass of the present invention, comprises the steps:
Get composition brass composition and content for as shown in Table 6.
Table six composition brass composition and content
| Containing Cu(%) | Ag(g/t) | As(%) | Bi(%) | Sn(%) | Pb(%) | Ni(%) | Sb(%) |
| 92.13 | 213 | 3.71 | 2.26 | 6.12 | 4.77 | 3.54 | 1.13 |
Reinforced fusion stage operation steps:
14.3 hours consuming time of reinforced fusing, adds 319.3 tons of composition brasses altogether, adds 6.5 tons of quartzites, 1.2 tons, lime, 3.8 tons of the pig iron;
Reinforced process body of heater is placed in 0 ° of level attitude, adopts charging vehicle reinforced from two charging door in batches, and quartzite, Wingdale added in the reinforced later stage.Natural gas oxygen-enriched burner consumes natural gas amount 8294 Nm
3, oxygen consumed tolerance 6552 Nm
3, between reinforced melting period, control in stove negative pressure at-30Pa～-40Pa, fusing finishes 1133 ℃ of actual measurement copper liquid temperatures.
Oxidation stage operation steps:
Oxidation stage continues 6.8 hours.Cleaning oxidation airduct, confirms that 6 airducts are unimpeded, opens air-supply main valve, regulates pneumavalve aperture standard-sized sheet, confirms that oxidation air flow reaches 3000 Nm
3/ h, pressure 6.5kg/cm
2and after stable, refining grate is verted to 17 °, it is refining side position, oxidation pressurized air immerses copper melts below 300mm by being distributed in the stainless steel open tube that 6 diameters of body of heater side are 22mm, stirs copper solutions, starts to be oxidized operation, between oxidation period, control in stove negative pressure at-20Pa～-30Pa, oxidation stage monitoring oxidation air flow, occurs fluctuating and processes in time, and final oxidation end relies on operative employee to get oxidation sample artificial judgment and is as the criterion.Refining grate is verted to 0 °, close oxidation wind, wait to drive a vehicle empty cinder ladle is placed under slag notch, open the fire door of slagging tap, the body of heater that verts verts to deslagging side direction, pours out the oxidation sludge on copper liquid surface, 43 tons of this heat deslagging, and oxidation finishes 1197 ℃ of rear copper liquid temperatures.Natural gas oxygen-enriched burner consumes natural gas amount 3212Nm
3, oxygen consumed tolerance 3123 Nm
3, consume oxidation air capacity 19432 Nm
3.
Oxidation sludge sample ingredient is in table seven.
Table seven oxidation sludge sample ingredient
| Cu(%) | Au(g/t) | Ag(g/t) | Zn(%) | Fe(%) | Ni(%) | SiO2(%) | Sn(%) | Al2O3(%) |
| 19.95 | 0.7 | 26 | 1.12 | 4.3 | 0.28 | 23.21 | 1.11 | 3.86 |
Reduction phase operation steps:
Reduction phase continues 2.7 hours.Cleaning reduction airduct, confirms that 6 airducts are unimpeded, opens and send Sweet natural gas main valve, regulates pneumavalve aperture standard-sized sheet, confirms that reduction gas discharge reaches 1500 Nm
3/ h, pressure 3.5kg/cm
2and after stable, refining grate is verted to 17 °, it is refining side position, also raw natural gas immerses copper melts below 300mm by being distributed in the stainless steel open tube that 6 diameters of body of heater side are 22mm, stirs copper solutions, starts restore job, between reduction period, control in stove negative pressure at-10Pa～+ 10Pa, reduction phase monitoring reduction gas discharge, occurs fluctuating and processes in time, and final reduction end relies on operative employee to get also former state artificial judgment and is as the criterion.Refining grate is verted to 0 °, close and go back raw natural gas, oxidation finishes 1233 ℃ of rear copper liquid temperatures.Consume reduction natural gas amount 4212 Nm
3.
Reduction anode copper sample ingredient analytical results is in table eight.
Table eight reduces anode copper sample ingredient
| Cu(%) | Au(g/t) | Ag(g/t) | Zn(%) | Fe(%) | Ni(%) | Pb(%) | Sn(%) | 0(%) |
| 99.33 | 0.7 | 14 | 0.0044 | 0.0052 | 0.11 | 0.023 | 0.043 | 0.11 |
Add and start to amount to consuming time to the qualified anode copper of output from raw material: 23.8 hours, gas permeable brick system consumption nitrogen 12m
3.
Claims (2)
1. smelt the refining grate of composition brass for one kind, it is characterized in that: this refining grate is made up of body of heater, drive unit and oxygen enrichment burner, gas permeable brick system and smoke processing system, described body of heater is one to be placed in the special-shaped horizontal cylinder on drive unit, drive unit is by converter body support parts and contain hydraulic ram, the hydraulic driving part composition of Hydraulic Station and composition of the control system thereof; Oxygen enrichment burner inserts in refining grate from refining grate headwall; Gas permeable brick system is by the air brick body and the composition of the control system that are arranged on refining grate base plate; Smoke processing system is made up of waste heat boiler, plate type flue gas cooler, bagroom, smoke exhaust fan, chimney and ring collection fume exhaust system; Described oxygen enrichment burner is shaped as long 1.3 meters, the logical oxygen inner tube composition that the logical Sweet natural gas outer tube that external diameter is 130 millimeters and external diameter are 98 millimeters.
2. a smelting process that is appropriate to the refining grate of smelting composition brass claimed in claim 1, is characterized in that, comprises the steps:
(1) the reinforced fusion stage: furnace charge adds in batches, reinforced and fusing time 12 hours altogether, reinforced fusion stage refining grate is driven body of heater is verted to 0 ° of state by drive unit, i.e. horizontal mid-way,
Composition brass material average assay is Cu 90%, Fe 0.6%, Sn 0.1%, Pb 0.64%, Zn 1.3%, Ni 0.5%, As 0.05%, Sb 0.055%, Bi 0.017%, Au 0.00027%, Ag 0.0268%,
Constantly add copper material and slag former quartzite and Wingdale by charging machine, the reinforced stage is accompanied by material melting process, and the In Crystal Solid Copper material adding is constantly fusing in stove,
Chemical composition and the granularity of described slag former quartzite and Wingdale are: quartz sand is containing SiO
2>90, other 8, Fe<2.0, granularity <20mm; Wingdale is containing SiO
21.3, CaO 54.0, other 44.5, Fe<2.0, granularity <20mm,
Adopt O
2the oxygen enrichment natural gas combustion nozzle burning of concentration >90%, Sweet natural gas is introduced from burner center, after combustion-supporting oxygen and air are pre-mixed, penetrate with Sweet natural gas high-speed jet and form strong shearing, stretching, stirring action from the rotation of burner nozzle, form a stable burning recirculation zone, burner main body flame, along with the momentum of mixed gas is expanded outward, further mixes, and carries out secondary firing, complete whole combustion processes
Reinforced fusion stage single oxygen enrichment burner gas discharge is controlled at 400～800Nm
3/ h, oxygen flow 400～800Nm
3/ h, combustion air flow: 2000～8000Nm
3/ h, enters stove material and adds 320 tons of weight to stop feeding in raw material, and in the time that the whole temperature of fusion of material reach 1130 ° of C, enters oxidation stage,
(2) oxidation stage: oxidization time 6 hours, oxidation stage refining grate is driven body of heater is verted to 17 ° of states by drive unit, pressurized air is invaded copper melts below 300mm by being distributed in the stainless steel open tube that 6 diameters of body of heater side are 22mm, is blown into pressure 6.5kg/cm
2, flow 3000Nm
3the pressurized air of/h is oxidized operation as oxygenant, constantly oxidized along with impurity, react output slag with slag former and float on copper liquid surface, after oxidation finishes, body of heater is verted to deslagging position, the slag that floats on copper liquid surface is drained only, oxidation stage finishes rear copper liquid temperature and reaches 1180 ° of C
(3) reduction phase: 2 hours recovery times, reduction phase refining grate is driven body of heater is verted to 17 ° of states by drive unit, Sweet natural gas is invaded copper melts below 300mm by being distributed in the stainless steel open tube that 6 diameters of body of heater side are 22mm, is blown into pressure 3.5kg/cm
2, flow 1500Nm
3the Sweet natural gas of/h carries out restore job as reductive agent, along with the Cu in copper liquid
2o is constantly reduced, and finally generates elemental copper, and reduction phase finishes rear copper liquid temperature and reaches 1220 ° of C, after reduction finishes, body of heater is verted to casting position, starts to carry out casting operation.
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| CN103937993A (en) * | 2014-04-01 | 2014-07-23 | 梧州漓佳铜棒有限公司 | Tilting type anode furnace nitrogen gas stirring device |
| CN106399692B (en) * | 2016-09-30 | 2018-02-06 | 中南大学 | A kind of concentration smelting method that cupric solid wastes recycling utilizes |
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