CN102586620A - Refining grate for smelting miscellaneous copper and smelting method thereof - Google Patents

Refining grate for smelting miscellaneous copper and smelting method thereof Download PDF

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CN102586620A
CN102586620A CN2012100604356A CN201210060435A CN102586620A CN 102586620 A CN102586620 A CN 102586620A CN 2012100604356 A CN2012100604356 A CN 2012100604356A CN 201210060435 A CN201210060435 A CN 201210060435A CN 102586620 A CN102586620 A CN 102586620A
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refining
heater
grate
refining grate
copper
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CN2012100604356A
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CN102586620B (en
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李赋屏
黄雁
范翔
陈波
邓敏隶
周瑞生
张兴勇
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广西有色再生金属有限公司
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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

A kind of refining grate and smelting process thereof of smelting composition brass
 
One, technical field
The present invention relates to the nonferrous metallurgical equipment technical field, particularly a kind of refining grate of smelting composition brass.
Two, background technology
Adopt the tilting type metallurgical furnace to smelt mode many shortcomings such as the same industry is very general, and its technical equipment is uneven, and the ubiquity energy consumption is high, exhaust emissions exceeds standard, the water resources unit consumption is big of composition brass at home and abroad.
Three, summary of the invention
The purpose of this invention is to provide a kind of refining grate of smelting composition brass; Adopt this refining grate can reduce energy expenditure; Practice thrift more process cost, help reducing 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, form by body of heater, drive unit and oxygen enrichment burner, gas permeable brick system and smoke processing system.Said body of heater is a special-shaped horizontal cylinder, and this body drop of refining grate places on the drive unit; Drive unit is by the body of heater support component and contain hydraulic ram, and the hydraulic driving part that Hydraulic Station and system thereof are formed is formed, and is flexible through the hydraulic actuating fluid compressing cylinder, to reach the purpose of the refining grate that verts; The oxygen enrichment burner inserts the refining grate from refining grate headwall, and the gas permeable brick system is made up of the air brick body and the system that are installed in refining grate base plate; Smoke processing system is made up of waste heat boiler, board-like gas cooler, bagroom, smoke exhaust fan, chimney and ring collection fume exhaust system.Flue gas is discharged from refining grate headwall opposite side and is got into smoke processing system.
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 the body of heater specification: internal diameter * interior length=12000 * 5000mm, produce the anode copper nominal capacity: the 360t/ stove.
The oxygen enrichment burner is long 1.3 meters, and the inner sleeve that outer tube that external diameter is 130 millimeters and external diameter are 98 millimeters is combined into, and interior pipe leads to oxygen, and outer tube leads to Sweet natural gas.
The gas permeable brick system is made up of 8 air brick body and system that are installed on refining grate base plate; Blast nitrogen from every gas permeable brick bottom; 30~120 liters/minute of nitrogen flows; Nitrogen blasts copper melts and is used to increase the mass-and heat-transfer in the refining grate, accelerates copper material melting and oxidation, reduction rate.
Smoke processing system is made up of waste heat boiler, board-like gas cooler, bagroom, smoke exhaust fan, chimney and ring collection fume exhaust system, and from the flue gas that the refining grate is discharged, flow is 28500 Nm 3/ h, 1200 ℃ of temperature, maximum dust content 50g/Nm 3, after the smoke processing system purifying treatment, flue-gas temperature drops to 130 ℃, dustiness 0.05g/Nm 3, through the chimney emptying.
The 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 two charging door through the refining grate add in the body of heater in the lump; Under efficient oxygen enrichment burner heat supply; In the stove material fast fusing also heat up, the refining grate verts to the refining operation angle and to be blown into pressure 6.5kg/cm through the stainless steel open tube that to be arranged in 6 diameters of charging door opposite side be 22mm 2, flow 3000 Nm 3The pressurized air of/h carries out the oxidation operation as oxygenant, makes the impurity in the composition brass form slag, and the refining grate verts and to the deslagging angle, discharges the slag oxidation end of job from cleanout door, begins to get into reduction period; The refining grate verts to the refining angle once more, is equally to be 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, and restore job produces qualified anode copper after finishing.Anode copper send the electrolysis wet-process refining through being cast into qualified positive plate, and slag is further handled recovery copper wherein, and flue gas gets into the waste heat boiler recovery waste heat, at last through gathering dust the processing emptying.Under reinforced, fusing, oxidation, reduction, 5 sessions states of casting, the gas permeable brick system controls 8 nitrogen flows respectively 30~120 liters of/minute variations according to different job states, accelerates the speed of each sessions, practices thrift the activity duration.
The basic reaction formula of oxidation stage: [Cu 2O]+[Me]=2 [Cu]+[MeO]
The basic reaction formula of reduction phase: Cu 2O+ CO=2Cu+ CO 2
A kind of 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 fusing time 12 hours altogether that reach, and reinforced fusion stage refining grate drives through drive unit and body of heater is verted to 0 ° of state promptly horizontal mid-way.
The composition brass raw material is outsourcing, and the refining grate is handled the composition brass raw material of average cupric more than 90%, and composition brass material average assay is seen 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: all be solid.Wherein, wire: diameter is not from waiting to 20mm less than 1mm; Copper spare: different shape, differ in size.
The reinforced stage is accompanied by the material melting process, and the solid-state copper material of adding is constantly fusing in stove, and through 2 charging door, charging machine constantly adds copper material and slag former quartzite and Wingdale,
Adopt O 2The oxygen enrichment Sweet natural gas burner combustion of concentration>90%; Sweet natural gas is introduced from the burner center, and combustion-supporting oxygen and air are pre-mixed the back and form intensive shearing, stretching, stirring action from burner spout rotation ejaculation with the Sweet natural gas high-speed jet, form a stable burning recirculation zone; In this zone, fuel combustion produces cracking, generates high radiating carbon granules and hydrocarbon mixture.Burner main body flame further mixes along with the momentum of mixed gas is expanded outward, carries out secondary firing, has accomplished whole combustion processes.
The composition of each main subsidiary material sees table two for details.
Table two: flux chemical ingredients and granularities such as Wingdale
Title SiO 2 CaO Other Fe Granularity
Silica 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 goes into stove material adding weight and promptly stops for 320 tons feeding in raw material, and when treating that the whole temperature of fusion of material reach 1130 ℃, then gets into oxidation stage.
1, oxidation stage: oxidization time 6 hours, oxidation stage refining grate drive through drive unit body of heater are verted to 17 ° of states, i.e. refining side position.The stainless steel open tube that the 6 piece diameters of pressurized air through being distributed in the body of heater side are 22mm immerses copper melts below 300mm, is blown into pressure 6.5kg/cm 2, flow 3000 Nm 3The pressurized air of/h carries out the oxidation operation as oxygenant, and constantly oxidized along with impurity floats on copper liquid surface with slag former reaction output slag.Oxidation after finishing is verted body of heater to the deslagging position, and the slag that will float on copper liquid surface drains only.Oxidation stage finishes the back copper liquid temperature and reaches 1180 ℃.
2, reduction phase: 2 hours recovery times, reduction phase refining grate drives through drive unit body of heater is verted to 17 ° of states, i.e. refining side position.The stainless steel open tube that the 6 piece diameters of Sweet natural gas through being distributed in the body of heater side are 22mm immerses copper melts below 300mm, 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 the copper liquid 2O constantly is reduced, and finally generates elemental copper.Reduction after finishing is verted body of heater to casting position, begins to carry out casting operation.Reduction phase finishes the back copper liquid temperature and reaches 1220 ℃.
3, fume exhaust system: the about 8~50g/ Nm of the dust-laden of refining grate output 3, the flue gas that temperature is about 1200 ℃ is produced steam through the waste heat boiler recovery waste heat, and meanwhile, the flue dust of being with also settles down in a large number in the flue gas; The flue gas that waste heat boiler is discharged gets into board-like gas cooler; After board-like gas cooler cools; The environment flue gas about 80 ℃ with set of circumstances cigarette system mixes; Flue-gas temperature is further reduced, and mixed flue gas gets into bagroom and purifies, and reduces to 50mg/ Nm from the dust contained flue gas concentration that bagroom comes out 3Below, flue gas converges and gets into chimney and discharge then.
Outstanding advantage of the present invention is:
1, adopts O 2The oxygen enrichment Sweet natural gas burner combustion of concentration>90%, the pressure-losses of burner is lower than conventional burner, can reduce energy expenditure to greatest extent, practices thrift more process cost.In the burner control process, along with load variations and processing requirement, oxygen, fuel and air flow quantity can be carried out the ratio adjusting, finally reach the ideal mixing and the burning of fuel and excess of oxygen.Feasible burning is more abundant, helps save energy and improves efficiency of combustion, reduces the discharging of harmful ingredients in flue gas, accelerates the raw material burn-off rate.
2, add the gas permeable brick system in refining grate bottom; Its effect be the nitrogen that between the grate operational period, continues to provide to stove in copper liquid be similar to the stirring of fountain shape, help reducing anode copper oxygen level, reduce furnace accretion, enlarge the interface of slag and melt, more effectively remove harmful non-metallic element and shorten the activity duration.
3, the about 8~50g/ Nm of the dust-laden of refining grate output 3, the flue gas that temperature is about 1200 ℃, final flue gas of discharging reaches discharging standards, GB 9078-1996 " industrial furnace atmosphere pollutants emission standards " secondary standard.
Four, description of drawings
Fig. 1 is the structural representation of the refining grate of smelting composition brass according to the invention.
Be labeled as among the figure: 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 according to the invention.
Be labeled as among the figure: body of heater 1, hydraulic ram 9, Hydraulic Station 10 and system 11 thereof and body of heater support component 12 are formed.
Fig. 3 is the oxygen enrichment nozzle structure synoptic diagram of the refining grate of smelting composition brass according to the invention.
Be labeled as among the figure: outer tube 21, inner sleeve 22.
Fig. 4 is the fume exhaust system layout diagram of the refining grate of smelting composition brass according to the invention.
Be labeled as among the figure: afterheat boiler system 18, ring collection fume exhaust system 19, board-like gas cooler 13,, cyclone 14, bagroom 15, smoke exhaust fan 16, chimney 17.
Five, embodiment
Below through accompanying drawing and embodiment technical scheme of the present invention is described further.
Embodiment 1
Extremely shown in Figure 4 like Fig. 1; The refining grate of smelting composition brass of the present invention; Form by body of heater, drive unit and oxygen enrichment burner, gas permeable brick system and smoke processing system; Said body of heater is one to place the special-shaped horizontal cylinder 1 on the body of heater support component 12, and drive unit is by containing hydraulic ram 9, and Hydraulic Station 10 and system 11 thereof and body of heater support component 12 are formed; The oxygen enrichment burner is made up of the outer tube 21 of logical Sweet natural gas and the inner sleeve 22 of logical oxygen, and the oxygen enrichment burner inserts the refining grate from refining grate headwall, and the gas permeable brick system is made up of air brick body 5 that is installed in refining grate base plate and system 20; Smoke processing system is made up of waste heat boiler 18, board-like 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, is meant 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 outer tube 21 and the external diameter that external diameter is 130 millimeters is 98 millimeters is formed, and inner sleeve leads to oxygen, and outer tube leads to Sweet natural gas; Oxygen enrichment burner 4 inserts in the stove from the right-side wall of refining grate body of heater 1, for the grate refining thermal source is provided through natural gas oxygen-enriched burning.Eight air brick bodies 5 of gas permeable brick system 21 are distributed in refining grate bottom, and according to different job states, the nitrogen flow of controlling the gas permeable brick system respectively is 30~120 liters of/minute variations through system 20.The essential structure that above refining grate body of heater 1, oxygen enrichment burner 4, air brick body 5 are formed grates is seated above the body of heater support component 12 of drive unit; Drive unit is by containing hydraulic ram 9, and Hydraulic Station 10 and system 11 thereof and body of heater support component 12 are formed; Flexible through hydraulic actuating fluid compressing cylinder 9, to reach the purpose of the refining grate that verts.
Sweet natural gas produces the great amount of high-temperature flue gas through the back of burning fully in refining grate body of heater 1; Flue-gas temperature is above 1200 ℃; Maximum dust content 50g/Nm3, flue gas at first gets into the waste heat boiler 18 of smoke processing system through the smoke outlet 6 of body of heater 1, and flue gas absorbs heat and 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.The flue gas that comes out from waste heat boiler 18 gets into board-like gas cooler 13 then; Board-like gas cooler 13 adopts the further cooled flue gas temperature of mode and the sedimentation flue dust of mechanical air blast; Flue gas gets into bagroom 15 after coming out from board-like gas cooler 13; The working mechanism of bagroom 15 is that ash-laden gas passes through filtering material, and grit is filtered, and filtering material captures coarse dust and mainly leans on the inertial impaction effect; Capture grain dust mainly by diffusion and sieving action, dropped to 0.05g/Nm through the flue gas maximum dust content behind the bagroom 15 further capture flue dust 3, effluxing through chimney 17 through smoke exhaust fan 16 backs.The flue gas that ring collection fume exhaust system 19 is captured is the flue gas that emits outside charging door 8, cleanout door 7 and the copper outlet 3 from refining grate 1; Temperature is about 80 ℃; Flue gas through exporting with board-like gas cooler 13 behind the cyclone 14 collection flue dust is mixed into bagroom 15, effluxes through chimney 17 through behind the 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 in lime, 4.1 tons of the pig iron;
Add the average composition of composition brass and see the following form three:
Table three:
Contain 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
It is reinforced from two charging door in batches that reinforced process body of heater places 0 ° of level attitude employing to add truck, 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 in the control stove negative pressure-30Pa~-40Pa, fusing finishes 1130 ℃ of actual measurement copper liquid temperatures.
The oxidation stage operation steps:
Oxidation stage continues 5.4 hours.Cleaning oxidation airduct confirms that 6 airducts are unimpeded, opens the air-supply main valve, regulates pneumavalve aperture standard-sized sheet, confirms that the oxidation air flow reaches 3000 Nm 3/ h, pressure 6.5kg/cm 2And after stable, the refining grate is verted to 17 °, i.e. the refining side position; The stainless steel open tube that the 6 piece diameters of oxidation pressurized air through being distributed in the body of heater side are 22mm immerses copper melts below 300mm, stirs copper solutions, beginning oxidation operation; Between oxidation period in the control stove negative pressure-20Pa~-30Pa; Oxidation stage monitoring oxidation air flow, the appearance fluctuation is in time handled, and final oxidation end relies on the operative employee to get oxidation appearance artificial judgment and is as the criterion.The refining grate is verted to 0 °, close oxidation wind, wait to drive a vehicle empty cinder ladle is placed under the slag notch, open the fire door of slagging tap, the body of heater that verts verts to the deslagging side direction, pours out the oxidation sludge on copper liquid surface, and 39 tons of this heat deslagging, oxidation finish 1189 ℃ of back 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
The oxidation sludge sample ingredient is seen 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
The reduction phase operation steps:
Reduction phase continues 2.1 hours.Cleaning reduction airduct confirms that 6 airducts are unimpeded, opens and send the Sweet natural gas main valve, regulates pneumavalve aperture standard-sized sheet, confirms that the reduction gas discharge reaches 1500 Nm 3/ h, pressure 3.5kg/cm 2And after stable, the refining grate is verted to 17 °, i.e. the refining side position; Also the 6 piece diameters of raw natural gas through being distributed in the body of heater side are 22mm the stainless steel open tube immerses copper melts below 300mm, stir copper solutions, the beginning restore job; Between reduction period in the control stove negative pressure-10Pa~+ 10Pa; Reduction phase monitoring reduction gas discharge fluctuation occurs and in time handles, final reduction finish to rely on the operative employee to get also the former state artificial judgment is as the criterion.The refining grate is verted to 0 °, close and go back raw natural gas, oxidation finishes 1228 ℃ of back copper liquid temperatures.Consume reduction natural gas amount 3274 Nm 3
Reduction anode copper sample ingredient is seen table five.
Table five reduction 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
Begin to amount to consuming time from the raw material adding to the qualified anode copper of output: 21.2 hours, gas permeable brick system consumption nitrogen 11m 3
Embodiment 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 shown in table six.
Table six composition brass composition and content
Contain 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 in lime, 3.8 tons of the pig iron;
Reinforced process body of heater places 0 ° of level attitude, and it is reinforced from two charging door in batches that employing adds truck, 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 in the control stove negative pressure-30Pa~-40Pa, fusing finishes 1133 ℃ of actual measurement copper liquid temperatures.
The oxidation stage operation steps:
Oxidation stage continues 6.8 hours.Cleaning oxidation airduct confirms that 6 airducts are unimpeded, opens the air-supply main valve, regulates pneumavalve aperture standard-sized sheet, confirms that the oxidation air flow reaches 3000 Nm 3/ h, pressure 6.5kg/cm 2And after stable, the refining grate is verted to 17 °, i.e. the refining side position; The stainless steel open tube that the 6 piece diameters of oxidation pressurized air through being distributed in the body of heater side are 22mm immerses copper melts below 300mm, stirs copper solutions, beginning oxidation operation; Between oxidation period in the control stove negative pressure-20Pa~-30Pa; Oxidation stage monitoring oxidation air flow, the appearance fluctuation is in time handled, and final oxidation end relies on the operative employee to get oxidation appearance artificial judgment and is as the criterion.The refining grate is verted to 0 °, close oxidation wind, wait to drive a vehicle empty cinder ladle is placed under the slag notch, open the fire door of slagging tap, the body of heater that verts verts to the deslagging side direction, pours out the oxidation sludge on copper liquid surface, and 43 tons of this heat deslagging, oxidation finish 1197 ℃ of back 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
The oxidation sludge sample ingredient is seen 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
The reduction phase operation steps:
Reduction phase continues 2.7 hours.Cleaning reduction airduct confirms that 6 airducts are unimpeded, opens and send the Sweet natural gas main valve, regulates pneumavalve aperture standard-sized sheet, confirms that the reduction gas discharge reaches 1500 Nm 3/ h, pressure 3.5kg/cm 2And after stable, the refining grate is verted to 17 °, i.e. the refining side position; Also the 6 piece diameters of raw natural gas through being distributed in the body of heater side are 22mm the stainless steel open tube immerses copper melts below 300mm, stir copper solutions, the beginning restore job; Between reduction period in the control stove negative pressure-10Pa~+ 10Pa; Reduction phase monitoring reduction gas discharge fluctuation occurs and in time handles, final reduction finish to rely on the operative employee to get also the former state artificial judgment is as the criterion.The refining grate is verted to 0 °, close and go back raw natural gas, oxidation finishes 1233 ℃ of back copper liquid temperatures.Consume reduction natural gas amount 4212 Nm 3
Reduction anode copper sample ingredient analysis result sees Table eight.
Table eight reduction 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
Begin to amount to consuming time from the raw material adding to the qualified anode copper of output: 23.8 hours, gas permeable brick system consumption nitrogen 12m 3

Claims (4)

1. refining grate of smelting composition brass; 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; Said body of heater is one to place the special-shaped horizontal cylinder on the drive unit, drive unit by the body of heater support component with contain hydraulic ram, the hydraulic driving part that Hydraulic Station and system thereof are formed is formed; The oxygen enrichment burner inserts in the refining grate from refining grate headwall; The gas permeable brick system is made up of the air brick body and the system that are installed in refining grate base plate; Smoke processing system is made up of waste heat boiler, board-like gas cooler, bagroom, smoke exhaust fan, chimney and ring collection fume exhaust system.
2. the refining grate of smelting composition brass according to claim 1 is characterized in that, said 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.
3. the refining grate of smelting composition brass according to claim 1 is characterized in that, said oxygen enrichment burner is shaped as long 1.3 meters, and pipe is formed in the logical oxygen that logical Sweet natural gas outer tube that external diameter is 130 millimeters and external diameter are 98 millimeters.
4. a smelting process that is suitable for the refining grate of the described smelting composition brass of claim 1 is characterized in that, comprises the steps:
(1) the reinforced fusion stage: furnace charge adds in batches, reinforced fusing time 12 hours altogether that reach, and reinforced fusion stage refining grate drives through drive unit body of heater is verted to 0 ° of state, promptly horizontal mid-way,
Composition brass material average assay is Cu 90%, Fe 0.6% Sn 0.1%, Pb0.64%, Zn1.3%, Ni0.5%, As0.05%, Sb0.055%, Bi0.017%, Au0.00027%, Ag0.0268%,
Constantly add copper material and slag former quartzite and Wingdale through charging machine, the reinforced stage is accompanied by the material melting process, and the solid-state copper material of adding is constantly fusing in stove,
The chemical ingredients and the granularity of said slag former quartzite and Wingdale are: silica sand contains SiO 2﹥ 90, other 8, Fe ﹤ 2.0, granularity<20mm; Wingdale contains SiO 21.3, CaO54.0, other 44.5, Fe ﹤ 2.0, granularity<20mm,
Adopt O 2The oxygen enrichment Sweet natural gas burner combustion of concentration>90%, Sweet natural gas is introduced from the burner center, and combustion-supporting oxygen and air are pre-mixed the back and form intensive shearing, stretching, stirring action from burner spout rotation ejaculation with the Sweet natural gas high-speed jet; Form a stable burning recirculation zone; Burner main body flame further mixes along with the momentum of mixed gas is expanded outward, carries out secondary firing; Accomplish 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 goes into stove material adding weight and promptly stops for 320 tons feeding in raw material, and when treating that the whole temperature of fusion of material reach 1130 ℃, then gets into oxidation stage,
(2) oxidation stage: oxidization time 6 hours; Oxidation stage refining grate drives through drive unit body of heater is verted to 17 ° of states; The stainless steel open tube that the 6 piece diameters of pressurized air through being distributed in the body of heater side are 22mm immerses copper melts below 300mm, is blown into pressure 6.5kg/cm 2, flow 3000 Nm 3The pressurized air of/h carries out the oxidation operation as oxygenant; Constantly oxidized along with impurity; Float on copper liquid surface with slag former reaction output slag, oxidation after finishing is verted body of heater to the deslagging position, and the slag that will float on copper liquid surface drains only; Oxidation stage finishes the back copper liquid temperature and reaches 1180 ℃
(3) reduction phase: 2 hours recovery times; Reduction phase refining grate drives through drive unit body of heater is verted to 17 ° of states; The stainless steel open tube that the 6 piece diameters of Sweet natural gas through being distributed in the body of heater side are 22mm immerses copper melts below 300mm, 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 the copper liquid 2O constantly is reduced, and finally generates elemental copper, and reduction phase finishes the back copper liquid temperature and reaches 1220 ℃, and reduction after finishing is verted body of heater to casting position, begins to carry out casting operation.
CN201210060435.6A 2012-03-09 2012-03-09 Refining grate for smelting miscellaneous copper and smelting method thereof CN102586620B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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Publication number Priority date Publication date Assignee Title
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
CN106399692A (en) * 2016-09-30 2017-02-15 中南大学 Concentration smelting method for resource utilization of copper-containing solid waste
CN106399692B (en) * 2016-09-30 2018-02-06 中南大学 A kind of concentration smelting method that cupric solid wastes recycling utilizes
CN107354299A (en) * 2017-05-23 2017-11-17 西北矿冶研究院 Cu, Pb, Zn, Fe recoverying and utilizing method in metal smelt process slag
CN107354299B (en) * 2017-05-23 2019-05-17 甘肃中色东方工贸有限公司 The recoverying and utilizing method of Cu, Pb, Zn, Fe in metal smelt process slag

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