Summary of the invention
The objective of the invention is to solve problem and the high reality of the little energy consumption of stage vacuum distilling output such as cupellation energy consumption height in the prior art, discharging height, long processing period, flue dust and slag amount are big; Provide a kind of can continuous production; Treatment capacity is 3~10 tons/day; Product be metallic state lead, antimony, bismuth alloy and thick silver alloys have that energy consumption is low, environmental friendliness, vacuum distillation plant and technology simple to operate, reduce carbon emission, save production cost.
Technical scheme of the present invention is: a kind of from lead
/Extract the equipment of gold and silver in the bismuth-base alloy, comprise vacuum furnace body, vapo(u)rization system, volatile matter discharge system, thick silver alloys discharge system, feed-pipe 5 and extraction pipe 6.Vapo(u)rization system is housed in the vacuum furnace body, and the vapo(u)rization system bottom is communicated with volatile matter discharge system and thick silver alloys discharge system respectively, and feed-pipe 5 passes the furnace shell of vacuum furnace body to the vapo(u)rization system top, and the furnace shell that extraction pipe 6 passes vacuum furnace body is communicated with its inner chamber.
Said vacuum furnace body comprises furnace hearth plate 11, furnace shell 12 and water cooled electrode 13.Furnace hearth plate 11 is connected with furnace shell 12 bottom end seal, and water cooled electrode 13 is passed furnace hearth plate 11 and stretched in the furnace shell 12.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said vapo(u)rization system comprises the open graphite evaporation body in hopper 21, outer condensation cover cap 22, internal layer condensation cover cap 23, outer condensation cover 24, the 3rd layer of condensation cover 25, second layer condensation cover 26, the first layer condensation cover 27, stay-warm case 28, top 29, bottom closed graphite evaporation body 30, conflux disk 31, graphite heater 32.Graphite heater 32 passes conflux disk 31; Bottom closed graphite evaporation body 30 places on the conflux disk 31; The open graphite evaporation body 29 in top places on the bottom closed graphite evaporation body 30 and with bottom closed graphite evaporation body 30 and together is enclosed within on the graphite heater 32; The open graphite evaporation body in top 29 and bottom closed graphite evaporation body 30 are with stay-warm case 28, the first layer condensation cover 27, second layer condensation cover 26, the 3rd layer of condensation cover 25 and outer condensation cover 24, its top from the inside to the outside successively and are stamped internal layer condensation cover cap 23 and outer condensation cover cap 22 and hopper 21 is housed, and hopper 21 is positioned at the below of feed-pipe 5 exit end.
The open graphite evaporation body 29 in said top comprises charging disk cover 290, feed tray 291, evaporating pan I 292 and insulation hoop I 293.Feed tray 291 is contained on the evaporating pan I 292, and charging disk cover 290 covers on feed tray 291, and feed tray 291 is equipped with insulation hoop I 293 with evaporating pan I 292 outsides.
Said evaporating pan 292 I are a plurality of lamination combinations (concrete quantity is confirmed according to actual needs), all have been with insulation hoop II 293 on every layer the evaporating pan.
The open graphite evaporation body 29 in said top can be according to the lead of handling
/The composition of bismuth-base alloy is confirmed the quantity of evaporating pan I 292, can adorn one or several (concrete quantity is confirmed according to actual needs).
Said bottom closed graphite evaporation body 30 comprises evaporating pan II 300, insulation hoop II 301 and bottom evaporating pan 302.Evaporating pan II 300 is placed on the bottom evaporating pan 302, and evaporating pan II 300 is enclosed with insulation hoop II 301 with bottom evaporating pan 302 outsides.
Said evaporating pan II 300 is a plurality of lamination combinations (concrete quantity is confirmed according to actual needs), and evaporating pan II 300 combination sleeves have insulation hoop II 301.
Said bottom closed graphite evaporation body 30 can be according to the lead of handling
/The composition of bismuth-base alloy is confirmed the quantity of evaporating pan II 300, can adorn one or several (concrete quantity is confirmed according to actual needs).
Said water cooled electrode 13 is passed furnace hearth plate 11 backs and is connected with the graphite heater 32 of vapo(u)rization system bottom.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said volatile matter discharge system comprises extraction line 41 and discharging pot 42, and the condensation product discharge port of extraction line 41 upper ends and conflux disk 31 is communicated with, insert in the discharging pot 42 its lower end.
Said thick silver alloys discharge system comprises graphite pipe connecting 51, metal tubing 52, vacuum storehouse wicket 55, vacuum storehouse 56, gate, vacuum storehouse 57, thick silver ingot mould 58.Graphite pipe connecting 51 upper ends are communicated with the thick silver alloys outlet of bottom evaporating pan 302, insert in the metal tubing 52 its lower end; Metal tubing 52 connects vacuum furnace body and vacuum storehouse 56; Vacuum storehouse wicket 55 is equipped with on 56 tops, vacuum storehouse, the one of which side is equipped with gate, vacuum storehouse 57, and thick silver ingot mould 58 is placed in the vacuum storehouse 56.
Said vacuum storehouse 56 is equipped with extraction pipe 54 and is connected with vacuum system.
Be provided with thermal insulation pipe 53 in the said metal tubing 52.
Roller 59 is equipped with in said thick silver ingot mould 58 bottoms.
Principle of work of the present invention is: during operation; The argentiferous lead 2-base alloy of fusing successively flows downward along evaporating pan I 292 in feed-pipe 5 sucks vacuum ovens and along graphite hopper 21, flowing in the open graphite evaporation body 29 in top under the effect of negative pressure of vacuum; In flow process, be heated above volatile evaporation of metals temperature such as lead, antimony, bismuth, make it a large amount of evaporations by heating element 32.Left alloy continue to flow to bottom closed graphite evaporation body 30 successively along evaporating pan II 300 flow downward and continue the evaporation; At this moment; Alloy is more past dirty; Transpirable alloying constituent is just few more, and difficult evaporated metals such as gold and silver, copper obtain increasing enrichment, reach higher concentration until enrichment at last.And the steam that produces at bottom one deck evaporating pan; Because of volatile component in the liquid phase very low; Difficulty in gas phase volatilization metal ingredient (like silver-colored steam) is then more, and this steam is sailed against the current in bottom closed graphite evaporation body 30, successively with evaporating pan in the mutual effect of liquid phase alloy phase; Reduce the difficult volatile component in the gas phase, until overflowing from uppermost steam escape orifice.The through hole that all volatile metal vaporss see through through hole and each layer condensation cover on the graphite stay-warm case 28 successively with behind the condensation cover heat-shift is condensed into molten drop and flow to condensation product graphite conflux disk 31, flows out along extraction line 41 that stoves are outer to be reclaimed to discharging pot 42 ingot castings, and the dystectic gold and silver of difficult volatilization, copper alloy then flow to from bottom evaporating pan 302 along graphite pipe connecting 51 the interior thick silver ingot mould 58 in vacuum storehouse 56; Because effusive is the dystectic silver alloys of difficult evaporable, zero pour is very high, it along with metal tubing that vacuum oven is connected in the graphite thermal insulation pipe compile and be directed into place in the vacuum warehouse be used to adorn in the ingot mould of thick silver alloys; After ingot mould is filled, stop charging, close vacuum storehouse wicket; The vacuum of vacuum storehouse and vacuum oven is broken off, shed the negative pressure in the vacuum storehouse, open gate, vacuum storehouse; Haul out thick silver ingot mould; Take out thick silver alloys, the ingot mould return is closed gate, vacuum storehouse; Vacuumize; Open vacuum storehouse wicket after making vacuum storehouse and vacuum oven internal gas pressure balance, charging continues to produce.
The invention has the beneficial effects as follows:
(1) can be in the vacuum distilling stage, successive be with alloy 3/4ths lead, antimony, arsenic, bismuth become alloy and separate, practice thrift in a large number the later stage blowing fuel and time, reduce labour intensity, improve production environment, greatly reduce pollutant emission;
(2) surplus the enrichment multiple of silver can reach 100 times, can continuous production;
(3) treatment capacity is big, energy consumption is low, no flue dust, non-oxidation slag, metal recovery rate high, equipment is reliable and stable, is a kind of energy-saving and cost-reducing new installation of environmental protection.
(4) in guaranteeing residue under the direct yield condition of gold and silver more than 98%, the weight ratio of residue and volatile matter can reach 1:3, and the plumbous antimony bismuth arsenic of volatile matter is the metal alloy ingot, has not had slag and flue dust.Comprehensive energy consumption power consumption 550kwh per ton
(5) use of integrated converter blowing working time and reverberatory furnace retailoring time and diesel oil and coal fuel can reduce 70%-75% the blowing amount and the reduction processing of flue dust and slag behind introducing the present invention.Obtain thick silver per ton and can practice thrift 1.7 tons of diesel oil, 3.5 tons of coals, this does not wherein also comprise consumption and the manual work and the time cost of soda ash and refractory materials, so economic benefit very significantly.
(6) the electric energy replacement of a big chunk of diesel oil coal in the traditional technology, reduced flue dust, slag generation, reduced emission of carbon-dioxide by cleaning, so the environmental benefit highly significant.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further, but protection scope of the present invention is not limited to said content.
Embodiment 1: shown in Fig. 1-3, a kind of from lead
/Extract the equipment of gold and silver in the bismuth-base alloy, comprise vacuum furnace body, vapo(u)rization system, volatile matter discharge system, thick silver alloys discharge system, feed-pipe 5 and extraction pipe 6.Vapo(u)rization system is housed in the vacuum furnace body, and the vapo(u)rization system bottom is communicated with volatile matter discharge system and thick silver alloys discharge system respectively, and feed-pipe 5 passes the furnace shell of vacuum furnace body to the vapo(u)rization system top, and the furnace shell that extraction pipe 6 passes vacuum furnace body is communicated with its inner chamber.
Said vacuum furnace body comprises furnace hearth plate 11, furnace shell 12 and water cooled electrode 13.Furnace hearth plate 11 is connected with furnace shell 12 bottom end seal, and water cooled electrode 13 is passed furnace hearth plate 11 and stretched in the furnace shell 12.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said vapo(u)rization system comprises the open graphite evaporation body in hopper 21, outer condensation cover cap 22, internal layer condensation cover cap 23, outer condensation cover 24, the 3rd layer of condensation cover 25, second layer condensation cover 26, the first layer condensation cover 27, stay-warm case 28, top 29, bottom closed graphite evaporation body 30, conflux disk 31, graphite heater 32.Graphite heater 32 passes conflux disk 31; Bottom closed graphite evaporation body 30 places on the conflux disk 31; The open graphite evaporation body 29 in top places on the bottom closed graphite evaporation body 30 and with bottom closed graphite evaporation body 30 and together is enclosed within on the graphite heater 32; The open graphite evaporation body in top 29 and bottom closed graphite evaporation body 30 are with stay-warm case 28, the first layer condensation cover 27, second layer condensation cover 26, the 3rd layer of condensation cover 25 and outer condensation cover 24, its top from the inside to the outside successively and are stamped internal layer condensation cover cap 23 and outer condensation cover cap 22 and hopper 21 is housed, and hopper 21 is positioned at the below of feed-pipe 5 exit end.
The open graphite evaporation body 29 in said top comprises charging disk cover 290, feed tray 291, evaporating pan I 292 and insulation hoop I 293.Feed tray 291 is contained on the evaporating pan I 292, and charging disk cover 290 covers on feed tray 291, and feed tray 291 is equipped with insulation hoop I 293 with evaporating pan I 292 outsides.
Said evaporating pan 292 I are 7 lamination combinations, all have been with insulation hoop II 293 on every layer the evaporating pan.
Said bottom closed graphite evaporation body 30 comprises evaporating pan II 300, insulation hoop II 301 and bottom evaporating pan 302.Evaporating pan II 300 is placed on the bottom evaporating pan 302, and evaporating pan II 300 is enclosed with insulation hoop II 301 with bottom evaporating pan 302 outsides.
Said evaporating pan II 300 is 7 lamination combinations, and evaporating pan II 300 combination sleeves have insulation hoop II 301.
Said water cooled electrode 13 is passed furnace hearth plate 11 backs and is connected with the graphite heater 32 of vapo(u)rization system bottom.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said volatile matter discharge system comprises extraction line 41 and discharging pot 42, and the condensation product discharge port of extraction line 41 upper ends and conflux disk 31 is communicated with, insert in the discharging pot 42 its lower end.
Said thick silver alloys discharge system comprises graphite pipe connecting 51, metal tubing 52, vacuum storehouse wicket 55, vacuum storehouse 56, gate, vacuum storehouse 57, thick silver ingot mould 58.Graphite pipe connecting 51 upper ends are communicated with the thick silver alloys outlet of bottom evaporating pan 302, insert in the metal tubing 52 its lower end; Metal tubing 52 connects vacuum furnace body and vacuum storehouse 56; Vacuum storehouse wicket 55 is equipped with on 56 tops, vacuum storehouse, the one of which side is equipped with gate, vacuum storehouse 57, and thick silver ingot mould 58 is placed in the vacuum storehouse 56.
Said vacuum storehouse 56 is equipped with extraction pipe 54 and is connected with vacuum system.
Be provided with thermal insulation pipe 53 in the said metal tubing 52.
Roller 59 is equipped with in said thick silver ingot mould 58 bottoms.
Embodiment 2: shown in Fig. 1-3, a kind of from lead
/Extract the equipment of gold and silver in the bismuth-base alloy, comprise vacuum furnace body, vapo(u)rization system, volatile matter discharge system, thick silver alloys discharge system, feed-pipe 5 and extraction pipe 6.Vapo(u)rization system is housed in the vacuum furnace body, and the vapo(u)rization system bottom is communicated with volatile matter discharge system and thick silver alloys discharge system respectively, and feed-pipe 5 passes the furnace shell of vacuum furnace body to the vapo(u)rization system top, and the furnace shell that extraction pipe 6 passes vacuum furnace body is communicated with its inner chamber.
Said vacuum furnace body comprises furnace hearth plate 11, furnace shell 12 and water cooled electrode 13.Furnace hearth plate 11 is connected with furnace shell 12 bottom end seal, and water cooled electrode 13 is passed furnace hearth plate 11 and stretched in the furnace shell 12.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said vapo(u)rization system comprises the open graphite evaporation body in hopper 21, outer condensation cover cap 22, internal layer condensation cover cap 23, outer condensation cover 24, the 3rd layer of condensation cover 25, second layer condensation cover 26, the first layer condensation cover 27, stay-warm case 28, top 29, bottom closed graphite evaporation body 30, conflux disk 31, graphite heater 32.Graphite heater 32 passes conflux disk 31; Bottom closed graphite evaporation body 30 places on the conflux disk 31; The open graphite evaporation body 29 in top places on the bottom closed graphite evaporation body 30 and with bottom closed graphite evaporation body 30 and together is enclosed within on the graphite heater 32; The open graphite evaporation body in top 29 and bottom closed graphite evaporation body 30 are with stay-warm case 28, the first layer condensation cover 27, second layer condensation cover 26, the 3rd layer of condensation cover 25 and outer condensation cover 24, its top from the inside to the outside successively and are stamped internal layer condensation cover cap 23 and outer condensation cover cap 22 and hopper 21 is housed, and hopper 21 is positioned at the below of feed-pipe 5 exit end.
The open graphite evaporation body 29 in said top comprises charging disk cover 290, feed tray 291, evaporating pan I 292 and insulation hoop I 293.Feed tray 291 is contained on the evaporating pan I 292, and charging disk cover 290 covers on feed tray 291, and feed tray 291 is equipped with insulation hoop I 293 with evaporating pan I 292 outsides.
Said evaporating pan 292 I are 9 lamination combinations, all have been with insulation hoop II 293 on every layer the evaporating pan.
Said bottom closed graphite evaporation body 30 comprises evaporating pan II 300, insulation hoop II 301 and bottom evaporating pan 302.Evaporating pan II 300 is placed on the bottom evaporating pan 302, and evaporating pan II 300 is enclosed with insulation hoop II 301 with bottom evaporating pan 302 outsides.
Said evaporating pan II 300 is 6 lamination combinations, and evaporating pan II 300 combination sleeves have insulation hoop II 301.
Said water cooled electrode 13 is passed furnace hearth plate 11 backs and is connected with the graphite heater 32 of vapo(u)rization system bottom.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said volatile matter discharge system comprises extraction line 41 and discharging pot 42, and the condensation product discharge port of extraction line 41 upper ends and conflux disk 31 is communicated with, insert in the discharging pot 42 its lower end.
Said thick silver alloys discharge system comprises graphite pipe connecting 51, metal tubing 52, vacuum storehouse wicket 55, vacuum storehouse 56, gate, vacuum storehouse 57, thick silver ingot mould 58.Graphite pipe connecting 51 upper ends are communicated with the thick silver alloys outlet of bottom evaporating pan 302, insert in the metal tubing 52 its lower end; Metal tubing 52 connects vacuum furnace body and vacuum storehouse 56; Vacuum storehouse wicket 55 is equipped with on 56 tops, vacuum storehouse, the one of which side is equipped with gate, vacuum storehouse 57, and thick silver ingot mould 58 is placed in the vacuum storehouse 56.
Said vacuum storehouse 56 is equipped with extraction pipe 54 and is connected with vacuum system.
Be provided with thermal insulation pipe 53 in the said metal tubing 52.
Roller 59 is equipped with in said thick silver ingot mould 58 bottoms.
Embodiment 3: shown in Fig. 1-3, a kind of from lead
/Extract the equipment of gold and silver in the bismuth-base alloy, comprise vacuum furnace body, vapo(u)rization system, volatile matter discharge system, thick silver alloys discharge system, feed-pipe 5 and extraction pipe 6.Vapo(u)rization system is housed in the vacuum furnace body, and the vapo(u)rization system bottom is communicated with volatile matter discharge system and thick silver alloys discharge system respectively, and feed-pipe 5 passes the furnace shell of vacuum furnace body to the vapo(u)rization system top, and the furnace shell that extraction pipe 6 passes vacuum furnace body is communicated with its inner chamber.
Said vacuum furnace body comprises furnace hearth plate 11, furnace shell 12 and water cooled electrode 13.Furnace hearth plate 11 is connected with furnace shell 12 bottom end seal, and water cooled electrode 13 is passed furnace hearth plate 11 and stretched in the furnace shell 12.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said vapo(u)rization system comprises the open graphite evaporation body in hopper 21, outer condensation cover cap 22, internal layer condensation cover cap 23, outer condensation cover 24, the 3rd layer of condensation cover 25, second layer condensation cover 26, the first layer condensation cover 27, stay-warm case 28, top 29, bottom closed graphite evaporation body 30, conflux disk 31, graphite heater 32.Graphite heater 32 passes conflux disk 31; Bottom closed graphite evaporation body 30 places on the conflux disk 31; The open graphite evaporation body 29 in top places on the bottom closed graphite evaporation body 30 and with bottom closed graphite evaporation body 30 and together is enclosed within on the graphite heater 32; The open graphite evaporation body in top 29 and bottom closed graphite evaporation body 30 are with stay-warm case 28, the first layer condensation cover 27, second layer condensation cover 26, the 3rd layer of condensation cover 25 and outer condensation cover 24, its top from the inside to the outside successively and are stamped internal layer condensation cover cap 23 and outer condensation cover cap 22 and hopper 21 is housed, and hopper 21 is positioned at the below of feed-pipe 5 exit end.
The open graphite evaporation body 29 in said top comprises charging disk cover 290, feed tray 291, evaporating pan I 292 and insulation hoop I 293.Feed tray 291 is contained on the evaporating pan I 292, and charging disk cover 290 covers on feed tray 291, and feed tray 291 is equipped with insulation hoop I 293 with evaporating pan I 292 outsides.
Said evaporating pan 292 I are 12 lamination combinations, all have been with insulation hoop II 293 on every layer the evaporating pan.
Said bottom closed graphite evaporation body 30 comprises evaporating pan II 300, insulation hoop II 301 and bottom evaporating pan 302.Evaporating pan II 300 is placed on the bottom evaporating pan 302, and evaporating pan II 300 is enclosed with insulation hoop II 301 with bottom evaporating pan 302 outsides.
Said evaporating pan II 300 is 10 lamination combinations, and evaporating pan II 300 combination sleeves have insulation hoop II 301.
Said water cooled electrode 13 is passed furnace hearth plate 11 backs and is connected with the graphite heater 32 of vapo(u)rization system bottom.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said volatile matter discharge system comprises extraction line 41 and discharging pot 42, and the condensation product discharge port of extraction line 41 upper ends and conflux disk 31 is communicated with, insert in the discharging pot 42 its lower end.
Said thick silver alloys discharge system comprises graphite pipe connecting 51, metal tubing 52, vacuum storehouse wicket 55, vacuum storehouse 56, gate, vacuum storehouse 57, thick silver ingot mould 58.Graphite pipe connecting 51 upper ends are communicated with the thick silver alloys outlet of bottom evaporating pan 302, insert in the metal tubing 52 its lower end; Metal tubing 52 connects vacuum furnace body and vacuum storehouse 56; Vacuum storehouse wicket 55 is equipped with on 56 tops, vacuum storehouse, the one of which side is equipped with gate, vacuum storehouse 57, and thick silver ingot mould 58 is placed in the vacuum storehouse 56.
Said vacuum storehouse 56 is equipped with extraction pipe 54 and is connected with vacuum system.
Be provided with thermal insulation pipe 53 in the said metal tubing 52.
Roller 59 is equipped with in said thick silver ingot mould 58 bottoms.
Embodiment 4: shown in Fig. 1-3, a kind of from lead
/Extract the equipment of gold and silver in the bismuth-base alloy, comprise vacuum furnace body, vapo(u)rization system, volatile matter discharge system, thick silver alloys discharge system, feed-pipe 5 and extraction pipe 6.Vapo(u)rization system is housed in the vacuum furnace body, and the vapo(u)rization system bottom is communicated with volatile matter discharge system and thick silver alloys discharge system respectively, and feed-pipe 5 passes the furnace shell of vacuum furnace body to the vapo(u)rization system top, and the furnace shell that extraction pipe 6 passes vacuum furnace body is communicated with its inner chamber.
Said vacuum furnace body comprises furnace hearth plate 11, furnace shell 12 and water cooled electrode 13.Furnace hearth plate 11 is connected with furnace shell 12 bottom end seal, and water cooled electrode 13 is passed furnace hearth plate 11 and stretched in the furnace shell 12.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said vapo(u)rization system comprises the open graphite evaporation body in hopper 21, outer condensation cover cap 22, internal layer condensation cover cap 23, outer condensation cover 24, the 3rd layer of condensation cover 25, second layer condensation cover 26, the first layer condensation cover 27, stay-warm case 28, top 29, bottom closed graphite evaporation body 30, conflux disk 31, graphite heater 32.Graphite heater 32 passes conflux disk 31; Bottom closed graphite evaporation body 30 places on the conflux disk 31; The open graphite evaporation body 29 in top places on the bottom closed graphite evaporation body 30 and with bottom closed graphite evaporation body 30 and together is enclosed within on the graphite heater 32; The open graphite evaporation body in top 29 and bottom closed graphite evaporation body 30 are with stay-warm case 28, the first layer condensation cover 27, second layer condensation cover 26, the 3rd layer of condensation cover 25 and outer condensation cover 24, its top from the inside to the outside successively and are stamped internal layer condensation cover cap 23 and outer condensation cover cap 22 and hopper 21 is housed, and hopper 21 is positioned at the below of feed-pipe 5 exit end.
The open graphite evaporation body 29 in said top comprises charging disk cover 290, feed tray 291, evaporating pan I 292 and insulation hoop I 293.Feed tray 291 is contained on the evaporating pan I 292, and charging disk cover 290 covers on feed tray 291, and feed tray 291 is equipped with insulation hoop I 293 with evaporating pan I 292 outsides.
Said evaporating pan 292 I are 5 lamination combinations, all have been with insulation hoop II 293 on every layer the evaporating pan.
Said bottom closed graphite evaporation body 30 comprises evaporating pan II 300, insulation hoop II 301 and bottom evaporating pan 302.Evaporating pan II 300 is placed on the bottom evaporating pan 302, and evaporating pan II 300 is enclosed with insulation hoop II 301 with bottom evaporating pan 302 outsides.
Said evaporating pan II 300 is 5 lamination combinations, and evaporating pan II 300 combination sleeves have insulation hoop II 301.
Said water cooled electrode 13 is passed furnace hearth plate 11 backs and is connected with the graphite heater 32 of vapo(u)rization system bottom.Be provided with insulation seal device between water cooled electrode 13 and the furnace hearth plate 11.
Said volatile matter discharge system comprises extraction line 41 and discharging pot 42, and the condensation product discharge port of extraction line 41 upper ends and conflux disk 31 is communicated with, insert in the discharging pot 42 its lower end.
Said thick silver alloys discharge system comprises graphite pipe connecting 51, metal tubing 52, vacuum storehouse wicket 55, vacuum storehouse 56, gate, vacuum storehouse 57, thick silver ingot mould 58.Graphite pipe connecting 51 upper ends are communicated with the thick silver alloys outlet of bottom evaporating pan 302, insert in the metal tubing 52 its lower end; Metal tubing 52 connects vacuum furnace body and vacuum storehouse 56; Vacuum storehouse wicket 55 is equipped with on 56 tops, vacuum storehouse, the one of which side is equipped with gate, vacuum storehouse 57, and thick silver ingot mould 58 is placed in the vacuum storehouse 56.
Said vacuum storehouse 56 is equipped with extraction pipe 54 and is connected with vacuum system.
Be provided with thermal insulation pipe 53 in the said metal tubing 52.
Roller 59 is equipped with in said thick silver ingot mould 58 bottoms.