CN206385242U - A kind of system for handling lateritic nickel ore - Google Patents

Abstract

The utility model discloses a kind of system for handling lateritic nickel ore, the system includes：Drying materials system, crushing system, mixing system, formation system, pelletizing drying system, roasting system and melting furnace system；Wherein, the discharging opening of drying materials system and the feeding mouth of crushing system are communicated, the discharging opening of crushing system and the feeding mouth of mixing system are communicated, the discharging opening of mixing system and the feeding mouth of formation system are communicated, the discharging opening of formation system and the feeding mouth of pelletizing drying system are communicated, the discharging opening of pelletizing drying system and the feeding mouth of roasting system are communicated, and the discharging opening of roasting system and the charging aperture of melting furnace system are communicated.Molten point of iron product of two kinds of nickelic grade and low nickel grade can be obtained respectively using system of the present utility model processing lateritic nickel ore, have the advantages that melting cost is low, environment-friendly, product quality is high, the rate of recovery is high.

Description

A kind of system for handling lateritic nickel ore

Technical field

The system that the utility model is related to processing lateritic nickel ore, belongs to the process field of lateritic nickel ore.

Background technology

The slag sluicing system of ferrous material is generally realized using blast furnace and electric furnace etc. at present.Blast furnace is a kind of upright type of furnace, is fitted When being smelted iron using it, Technological Economy need to be there is using coke as raw material for handling acid pellet or sintering deposit, and also Index is good, and technique is simple, and output is big, and labor productivity is high, low power consumption and other advantages, but there is also to entering stove thing for blast furnace The requirement of material is high, coking coal, energy consumption need to be used higher and the low shortcoming of efficiency of energy utilization；Electric furnace is that the electric energy in stove is converted into Heat has furnace atmosphere to be easily controlled the heating furnace of workpiece heat, its advantage, and material heating is fast, and heating-up temperature is high, produces Journey is easier to realize mechanization and automation, and labour health condition is good, and the thermal efficiency is high, good product quality, and more environmentally-friendly, but electric furnace Obvious shortcoming is similarly there is, the problems such as such as controller switching equipment is costly, power cost is high and should be noted insulation.

Nickel is a kind of metal of rich reserves on earth, and world land nickel reserves are about 4.7 hundred million tons, wherein 60% belongs to Laterite nickel deposits, 40% belongs to magmatic Ni-Cu sulfide deposit.The industrial nickel of current world's nickel, essentially from vulcanization Nickel ore resource, accounts for the 60%~65% of total output, and remaining comes from nickel ore.However, with the day of nickel sulfide ore on the earth Become exhausted, the ratio for producing nickel from nickel ore is being improved rapidly.

Patent No. ZL200810079930.5 Chinese utility model patent provides a kind of side of smelting iron in arc furnace Method and device, smelting furnace part include body of heater 2, bell 10, charging (feeding) equipment and discharging equipment, and molten iron outflow port is arranged at the bottom of body of heater 2 9.There are three electrode jacks 12 on bell 10, electrode 1 is inserted respectively, each of three electrodes jack is in triangular distribution.Body of heater 2 is outer a pair Heating furnace 5a, 5b and a pair of storage heaters 6a, 6b, two heating furnace relative positions are arranged on the both sides outside body of heater 2.Heating furnace passes through Connector 4 is connected with the body of heater 2 of electric arc furnaces, and gas can flow back and forth in connector.Storage heater 6a, 6b one end and heating furnace Connection, the other end is connected with air blower 8 and exhaust system respectively.Heating furnace is provided with burner, combustion air pipeline and fuel conduit It is connected to burner.Four tunnels of the outlet of air blower 8 point, are connected with two heating furnaces and two storage heaters respectively, and valve is housed per road Door.The fuel conduit being connected with heating furnace and it is also equipped with valve on the exhaust pipe road being connected with storage heater.Two heating furnaces Alternate combustion fuel and bubbing, two storage heater alternating accumulation of heats and heat release.Bubbing is that metal ferriferous oxide was reduced The gas produced in journey, wherein containing substantial amounts of CO, H₂.The heat storage 7 of the storage heater is ceramic ball body.The body of heater of electric arc furnaces And bell is steel construction.The body of heater 2 and bell 10, are tightly connected between electrode 1 and bell 10 for water collar.Electric arc furnaces is equipped with Pressure air defense valve 11 is used as explosion-protection equipment；Major defect present in the electric arc furnaces is as follows：

(1) in melting burner hearth, on the one hand because thermal current in heating furnace or even flame enter in smelting furnace burner hearth directly Graphite electrode is blown, it will wash away electrode material and cause consumption of electrode to accelerate；Another aspect thermal current is in smelting furnace row The stop of electrode is run on inbound path, it will cause the disorder of air-flow.

(2) a large amount of gases will be produced in the metal oxide reduction process, it is unavoidable to produce a large amount of foamed slags, The thermal current that these foamed slags enter smelting furnace burner hearth after floating through heating furnace, which drives, to be made with Airflow obstruction ventilation shaft It is not smooth into producing.

(3) in heating furnace mainly by the bubbing in smelting furnace as combustion gas, its growing amount with material and coal, The change of the proportionings such as coke has very great fluctuation process, causes the unstability of burning, influences the control of in-furnace temperature.Due to combustible gas Body is uncontrollable in amount, is likely to result in explosion accident.

(4) fuel gas is burnt with combustion air in heating furnace, rather than is directly carried out in smelting furnace burner hearth Burning, unavoidably causes thermal loss, the not high of heat utilization ratio

Patent No. ZL201020682060.3 Chinese utility model patent discloses a kind of gas heat accumulating type melting furnace, Including calciner 1, holding furnace 10.The burner hearth bottom of calciner 1 is higher than the burner hearth bottom of holding furnace 10, the burner hearth bottom of calciner 1 Portion is connected by skewed slot 11 with the burner hearth bottom of holding furnace 10.A set of burner is respectively equipped with calciner 1 and holding furnace 10； Aluminium liquid in calciner 1 is concentrated after thawing, the inside holding of holding furnace 10 is flowed into through skewed slot 11, all using combustion in two burner hearths Gas combustion heating.Major defect present in the gas heat accumulating type melting furnace is as follows：

(1) have the shortcomings that combustion gas smelting furnace is intrinsic, using radiant heat transfer, the thermal efficiency is low, it is difficult to realize higher molten bath, Bed utilization rate is low, it is difficult to realize large-scale.

(2) it is mainly for the melting of aluminium ingot, and adaptability to raw materials is narrower, when handling the larger material of dregginess, due to molten Slag will be floated over above metal liquid phase, and slag thermal conductivity itself is very poor, it will greatly stop heat from burner hearth to metal phase Conduction, causes thermal state metal to be deteriorated with slag contacts surface mass-and heat-transfer, it is most likely that to cause thermal state metal to be separated with slag tired Difficulty, and produce the situation of metal recovery rate reduction so that productivity effect is not good.

Application No. 200910075372.X Chinese utility model patent discloses a kind of heat storage type electric arc furnace melting refining The device of iron, including electric arc furnace body (4), electrode (2), bell (1) and the equipment, charging (feeding) equipment and the discharging equipment that match, 2 Heat storage (13) is housed in~8 combustion chambers (11a, 11b) and 2~8 storage heaters (12a, 12b), storage heater；The storage heater One end be connected with combustion chamber, the other end is connected with exhaust system and air blower (14) respectively, and described device is additionally provided with 2~8 Coal gasification case (9a, 9b), between electric arc furnace body and combustion chamber, provided with 1~10 layer of coal grid (10) in coal gasification case, Coal grid is built with coal dust or lump coal or honeycomb briquette, and the top of coal gasification case is provided with the socket of coal grid；The coal gasification case is set There is bypass (5), outlet, entrance and the bypass of coal gasification case are provided with valve (6)；The device institute of the heat storage type electric arc furnace deoxy iron-smelting The major defect of presence is as follows：

(1) still using electrode as heating element heater, therefore its energy consumption is still higher；

(2) fail to realize in different fusing sections, using different fusing separate modes, therefore the energy utilization ratio not It is high.

Utility model content

Main purpose of the present utility model is to provide a kind of system for handling lateritic nickel ore, using system of the present utility model Handle lateritic nickel ore, two kinds of products of high-grade ferronickel and low-grade ferronickel can be obtained, with melting cost it is low, environment-friendly, The advantages of product quality is high, the rate of recovery is high.

Above-mentioned purpose of the present utility model is mainly achieved through the following technical solutions：

A kind of system for handling lateritic nickel ore, including：Drying materials system, crushing system, mixing system, formation system, Pelletizing drying system, roasting system and melting furnace system；Wherein, the discharging opening of the drying materials system and described broken The feeding mouth of broken system is communicated, and the feeding mouth of the discharging opening of the crushing system and the mixing system is communicated, the batch mixing system The feeding mouth of the discharging opening of system and the formation system is communicated, the discharging opening of the formation system and the pelletizing drying system Feeding mouth is communicated, and the discharging opening of the pelletizing drying system and the feeding mouth of the roasting system are communicated, the roasting system Discharging opening and the charging aperture of the melting furnace system are communicated.

The melting furnace system includes furnace foundation, the refractory-lined ovens bottom being located on furnace foundation and body of heater, the body of heater Including side wall, partition wall and furnace roof；Wherein, the burner hearth of body of heater is divided into fusion zone and settled by the partition wall extended downwardly from furnace roof Two, area part, the partition wall lower end and refractory-lined ovens bottom are at regular intervals, it is allowed to which the melt melted in fusion zone flows to decanting zone； Wherein, decanting zone furnace bottom is less than fusion zone furnace bottom, fusion zone furnace bottom using tilting design, and one end adjacent with decanting zone to It is lower to tilt and communicated with decanting zone；In fusion zone, the furnace roof away from decanting zone one end is provided with charging aperture；It is relative in fusion zone Both walls are provided with burner；The graphite electrode through furnace roof is provided with decanting zone, is respectively equipped with the bottom of decanting zone for molten The outlet of slag discharge and the outlet discharged for thermal state metal.

The spacing at the partition wall lower end and fusion zone refractory-lined ovens bottom is 500~800mm.Thus, ensuring to melt into stove material While refining and mobility requirement, fusion zone and decanting zone can also be separated, to realize that different zones melting condition is gentle The accurate control of atmosphere.If spacing is too small, melt can be hindered to flow into decanting zone；If spacing is excessive, it is impossible to by fusion zone with sinking The gas isolating in area drops.

In described decanting zone, relative both sides are arranged symmetrically two fusion zones.

2nd area of one area of fusing and fusing are divided into the fusing, and one area of fusing is located at the higher one end of furnace bottom, melts 2nd area It is adjacent with decanting zone；It is further preferred that one area furnace bottom angle of inclination of the fusing is between 1~3 °, it is ensured that after rapid melting Material can flow to fusing 2nd area；Two area furnace bottom angles of inclination are melted between 3~5 °, it is ensured that the material after fusing separation can To flow to decanting zone；

The furnace bottom length ratio in described 2nd area of the area of fusing one and fusing is 1：3~10.

One area of the fusing is heated using heavy oil with the mixed combustion of high temperature combustion air, and 2nd area of fusing use combustion gas and high temperature Combustion air mixed combustion is heated, and decanting zone is using graphite electrode heating fusing separation metal and slag, it is preferable that the combustion gas is Fuel gas with low heat value.

Described heat-storage type burner includes burner, regenerator, air blower, flue, gas pipeline, flue gas and air Common conduit, four-way reversing valve and air-introduced machine；Multiple burners are relative respectively to be located on the wall of described fusion zone opposite sides, Burner is provided with gas pipeline, the top connection of burner and regenerator.

By the molten bath of the melt composition liquid constantly entered from fusion zone in decanting zone, in decanting zone, furnace roof, which runs through, graphite Electrode, graphite electrode is inserted into molten bath, is incubated molten bath using electric arc heated, it is ensured that the final separation of slag and thermal state metal. Slag after separation is discharged by slag exit, and thermal state metal is exported by thermal state metal and discharged.The slag exit is located at decanting zone Middle and upper part, thermal state metal outlet positioned at the bottom of decanting zone, and two outlets be respectively positioned on fusion zone furnace bottom least significant end it Under.

Side wall, furnace roof and the furnace foundation of described body of heater are built into using refractory material and refractory brick, wherein in side Wall and the built-in cooling Copper Water Jacket of furnace roof.

Melting furnace system described in the utility model compared with existing smelting system, it is topmost be distinguished as it is following Several respects：

(1) whole melting furnace system is divided into fusion zone and the part of decanting zone two, and decanting zone furnace bottom will be less than fusing Communicated below area's furnace bottom, fusion zone with decanting zone.

(2) 2nd area of one area of fusing and fusing are divided into fusing, are provided with heat accumulating type on relative two ends side wall in fusion zone Solid material heats using heavy oil with the mixed combustion of high temperature combustion air in burner, one area of fusing, makes solid material rapid melting； Melt 2nd area and heat melting materialss with the mixed combustion of high temperature combustion air using combustion gas so that material rapid melting is separated.Fusing Furnace bottom is designed using tilting in area, and one area's furnace bottom of fusing is low close to two area sides of fusing, the material of rapid melting after being heated 2nd area of flow direction fusing；Melt that two area's furnace bottoms are low close to decanting zone side, be melted the flow direction of material decanting zone of separation.

(3) decanting zone is through there is graphite electrode on furnace roof, and graphite electrode insertion is incubated in molten bath using electric arc heated, most The separation of thermal state metal and slag is completed in decanting zone eventually.Slag passes through slag exit and thermal state metal respectively with thermal state metal Outlet discharge.

(4) whole smelting furnace side wall, furnace roof and furnace foundation are built into using refractory material and refractory brick, wherein in melting Furnace side wall inside furnace roof fire resisting material with, provided with cooling Copper Water Jacket, protecting refractory material.

In summary, the utility model provides a kind of system for handling lateritic nickel ore and included：It is drying materials system, broken System, mixing system, formation system, pelletizing drying system, roasting system and melting furnace system；Described heating melting Furnace system combines the advantage of gas heating smelting furnace and electric arc heated smelting furnace, it is to avoid the shortcomings of both smelting furnaces；Plus Smelting furnace system is divided into the fusion zone and decanting zone interconnected, and fusion zone furnace bottom uses inclined design, and higher than decanting zone 2nd area of one area of fusing and fusing are divided into furnace bottom, fusing, and two area's furnace bottom length ratios are 1：3~10, melt the furnace bottom angle in an area The furnace bottom angle that degree is 1~3 °, melt 2nd area is 3~5 °, and fusion zone is arranged symmetrically in decanting zone both sides.Used in fusion zone The relatively thin bed of material, it is ensured that fuel gas buring heat transfer efficiency, in the operation of decanting zone mining height molten bath, improves smelting furnace monomer yield.Molten Change an area using heavy oil as fuel, thing in the fast heating at high temperature fusion zone of heavy oil combustion generation is utilized by heat-accumulating burner Material, obtains flowable melt；2nd area are being melted using combustion gas as fuel, are being produced by heat-accumulating burner using fuel gas buring High-temperature heating so that flow into decanting zone after material melting separation；Insulation, greatly reduction life are aided in using electric arc heated in decanting zone Produce cost.

The utility model further provides a kind of method for applying the system to handle lateritic nickel ore, including：

(1) lateritic nickel ore, reducing agent and additive are dried in drying materials system；

(2) lateritic nickel ore after drying, reduction coal and additive are crushed in crushing system；

(3) material after will be broken is well mixed in mixing system；

(4) aqueous pelletizing is made in well mixed material in formation system；

(5) aqueous pelletizing is dried in pelletizing drying system；

(6) pelletizing after drying carries out reduction roasting in roasting system and obtains metallized pellet；

(7) additive added by metallized pellet and as needed puts into melting furnace system, material together One area of fusing is put into by charging aperture, the heat-storage type burner for being arranged on opposite sides in one area of fusing is handed over by fuel of heavy oil Tubing flow displacement blow the fire flame heating fusing pelletizing, make material soften rapidly and formed flowable melt flow direction fusing 2nd area；It is arranged on fusing The flame heating flowing melt that the heat-storage type burner alternate blowing fuel gas buring in two areas both sides is produced, makes material start fusing point From；

(8) melt of fusing separation flows into decanting zone by the interval of partition wall and furnace bottom and forms molten bath, using inserting molten bath Graphite arc heating and thermal insulation is carried out to melt, separate ferronickel and slag, the ferronickel and slag after separation pass through respectively to be set The outlet of thermal state metal discharge is supplied in the bottom of decanting zone and outlet row of the middle and upper part for slag discharge of decanting zone is arranged on Go out.

(9) after ferronickel discharges out of the furnace, roasting material and additive are added again by charging aperture.

The ferrous metal rate of metallized pellet obtained by step (6), if degree of metalization is too low, is said more than 60% Bright pelletizing reducing degree is poor, influence fusing separating effect.

By controlling the gas of heat-storage type burner the atmosphere in fusion zone is kept weak oxide atmosphere in step (7)； It is preferred that, described weak oxide atmosphere is that oxygen content is 8~15%；According to macroscopic property, metallic iron is prior to metal Oxidation reaction occurs for nickel, therefore in fusion zone oxidation reaction occurs for a part of metallic iron, generates iron oxide；And nickel only has on a small quantity by oxygen Change.Oxide can enter slag phase in fusing separation process, so as to significantly reduce the metal Ferrum content in iron phase, improve nickel Grade, is conducive to obtaining high-grade dilval.

Be arranged on the heat-storage type burner of opposite sides in one area of fusing makes fusing by fuel alternate blowing flame of heavy oil One 1200~1400 DEG C of area's temperature control；At such a temperature, metallized pellet can soften rapidly；It is arranged on two area both sides of fusing Heat-storage type burner alternate blowing fuel gas buring make the area's temperature control of fusing two be 1300~1700 DEG C, flow at such a temperature Fusing separation occurs for melt.

Ferronickel after being separated in step (8) is settled down to bottom, is discharged, obtained for the first time by the outlet discharged for thermal state metal Obtain high-grade ferronickel；Slag continues to heat in molten bath, the secondary low-grade ferronickel of generation, then passes through going out for being discharged for thermal state metal Second of discharge of mouth.

In step (8) using the graphite electrode progress heating and thermal insulation for inserting molten bath make decanting zone temperature be maintained at 1500~ 1800℃；If temperature is too low, the separating effect of slag and ferronickel is deteriorated；If temperature is too high, energy consumption increase, and the reduction body of heater longevity Life.

Further, it is 15~30min that melt, which reaches soaking time behind decanting zone,；To ensure that ferronickel and slag can be good Separation.If the time is too short, separating effect is poor；If overlong time, reduction reaction will largely occur for the metal oxide in slag, The metallic iron of generation will enter ferronickel, reduce nickel grade, be unfavorable for obtaining high-grade ferronickel.

After the discharge of high-grade ferronickel, soaking time of the slag in decanting zone is 40~80min；During this period of time, slag In metal oxide (iron oxide and small amounts nickel) and graphite electrode react, generation metal is simultaneously separated with slag, due to molten Metal in the dreg oxide is largely iron oxide, therefore the metal of secondary generation is low-grade ferronickel.If the time is too short, it is impossible to ensure Reduction and separating effect；If overlong time, the loss of graphite electrode is excessive.

The main beneficial effect of technical solutions of the utility model：

(1) the utility model provides a kind of system for handling lateritic nickel ore and its application in processing lateritic nickel ore, The system includes：Drying materials system, crushing system, mixing system, formation system, pelletizing drying system, roasting system with And melting furnace system；Using system and method for the present utility model handle lateritic nickel ore, can obtain high-grade ferronickel and Low-grade two kinds of products of ferronickel, have the advantages that melting cost is low, environment-friendly, product quality is high, the rate of recovery is high.

(2) melting furnace system described in the utility model using body of heater subregion set, be respectively equipped with interconnect but It is two fusion zones and a decanting zone for having partition wall.In fusion zone melting materialss, hot gold is completed in decanting zone insulation molten bath The separation of category and slag.The fusing for being primarily due to solid material usually requires more than the 80% of consumption fusing gross energy, so Fusion zone provides heat using heat-storage type burner combustion gas, greatly reduces melting cost, it is to avoid use expensive power The energy (electric arc) is used as main heating source.And the area uses zoning design, and furnace bottom uses tilting, utilizes the height of heavy oil combustion The high temperature of density heat and fuel gas buring so that material is melting area's rapid melting, and the material of rapid melting is through melting 2nd area After fusing separation, it flow in decanting zone, the less height of bed of material holding (<500mm), it is to avoid fuel gas buring heats poor thermal conduction Defect.Secondly, using electric arc heated, it is ensured that higher melt pool height, improved in decanting zone by institute's calorific requirement is less Smelting furnace monomer yield, it is to avoid fuel gas buring heated molten bath is highly difficult to the defect improved.

(3) melting furnace system described in the utility model uses regenerative combustion technology, is existed first using temperature More than 1000 DEG C of high-temperature air combustion promoter, greatly reduces gas consumption, smoke discharge amount and substantially reduces, improves smelting furnace Interior temperature (>1500 DEG C), exhaust gas temperature be reduced to less than 250 DEG C, the thermal efficiency it is high.Using low heat value (<3000Kcal/m³) coal Gas, coal gas, it is particularly possible to be used as coal system by the use of coal resources such as cheap, the industrial lignite jet coals without value Gas raw material, its cost is the 50% even lower of electricity price lattice.

(4) melting furnace system described in the utility model avoids using fuel combustions such as coke adding in fusion zone Heat, so that will not final products be caused with the pollution of objectionable impurities elements.Follow-up refining cost is greatly reduced, product is improved Added value.

In summary, heating smelting system of the present utility model is compared with other smelting furnaces, and it combines fuel gas buring and added Heat and the advantage of electric arc heated, it is to avoid the defect of the two, melting cost reduction, smelting efficiency are improved, good product quality, environment Close friend, there is very high practical value.

Brief description of the drawings

The schematic diagram of the system of Fig. 1 the utility model processing lateritic nickel ore.

The melting furnace schematic diagram that Fig. 2 the utility model is provided；

The schematic diagram of heat-storage type burner included in Fig. 3 the utility model melting furnaces；

Heat-storage type burner working state schematic representation after Fig. 4 commutations.

Description of reference numerals：1- furnace foundations, 2a, 2b- refractory material furnace bottom, 3- body of heater side walls, 4- partition walls, 5- furnace roofs, 6- Charging aperture, 7- slag exits, the outlet of 8- thermal state metals, 9- combustor nozzles, 10- regenerator, 10a, 10b- heat storage, 11- drums Blower fan, 12- flues, 13a, 13b- gas pipeline, 14- graphite electrodes, 15- fusion zones, 15a- are melted an area, 15b- and melted Change 2nd area, 16- decanting zones, 17- solid materials, 18- molten baths, 19a, 19b- flue gas and air common conduit, the commutation of 20- four-ways Valve, 21- flue gas processing devices, 22- air-introduced machines.

Embodiment

With reference to shown in Fig. 1, the utility model provides a kind of system for handling lateritic nickel ore, including：Drying materials system S100, crushing system S200, mixing system S300, formation system S400, pelletizing drying system S500, roasting system S600 and Melting furnace system S700；Wherein, the discharging opening of the drying materials system S100 and the crushing system S200 pan feeding Mouth is communicated, and the discharging opening of the crushing system S200 and the mixing system S300 feeding mouth are communicated, the mixing system S300 discharging opening and the formation system S400 feeding mouth are communicated, the discharging opening and the pelletizing of the formation system S400 Drying system S500 feeding mouth is communicated, the discharging opening of the pelletizing drying system S500 and entering for the roasting system S600 Material mouth is communicated, and the discharging opening of the roasting system S600 and the melting furnace system S700 feeding mouth are communicated.

With reference to shown in Fig. 2, the melting furnace system S700, including furnace foundation 1, refractory material furnace bottom 2a, 2b are interior The body of heater side wall 3 being built into by refractory brick and refractory material of cooling Copper Water Jacket is put, between fusion zone 15 and decanting zone 16 Partition wall 4, the furnace roof 5 above burner hearth, the charging aperture 6 located at the top of 15 furnace roof of fusion zone 5, positioned at the lower section of decanting zone 16 Slag exit 7 is with thermal state metal outlet 8, heat-storage type burner burner 9, regenerator 10 on the opposite sides wall of fusion zone 15 Internal heat storage 10a, 10b, air-introduced machine 11, flue 12, gas pipeline 13a, 13b are placed in the stone of the furnace roof 5 of decanting zone 16 Electrode ink 14；Smelting furnace is divided into fusion zone 15, decanting zone 16, wherein, one area 15a of fusing, two area 15b of fusing are divided into fusing, And one area 15a of fusing is corresponding with refractory material furnace bottom 2a, two area 15b of fusing are corresponding with refractory material furnace bottom 2b, and fusion zone 15 exists Decanting zone both sides are arranged symmetrically, and the furnace bottom of fusion zone 15 is higher than the furnace bottom of decanting zone 16.Solid material 17 is put into by charging aperture 6 Into one area 15a of fusing, by the heat-storage type burner alternate blowing flame of both sides, the high density energy formed using heavy oil combustion Amount plus material, material fast softening simultaneously form flowable melt, two area 15b of flow direction fusing；Melt is flowed by melting two area 15b The heat-storage type burner alternate blowing flame of both sides, the melt of the high temperature conduction heating flowing formed using fuel gas buring, material Start fusing separation, and flow to decanting zone 16.The furnace bottom of fusion zone 15 uses tilting furnace bottom, wherein melting an area 15a and fusing Two area 15b furnace bottoms length ratios are 1：3~10, one area 15a furnace bottoms angle of inclination of fusing is between 1~3 °, it is ensured that after rapid melting Material can flow to fusing two area 15b；Two area 15b furnace bottoms angles of inclination are melted between 3~5 °, it is ensured that after fusing separation Material can flow to decanting zone 16.In decanting zone 16, by the molten bath of the melt composition liquid constantly entered from fusion zone 15 18, in decanting zone 16, furnace roof 5 is through there is graphite electrode 14, and graphite electrode 14 is inserted into 18 in molten bath, is incubated using electric arc heated Molten bath 18, it is ensured that the final separation of slag and thermal state metal.Slag after separation is discharged by slag exit 7, and thermal state metal is by warm State metal outlet 8 is discharged.

Heat-storage type burner primary structure as Figure 3-Figure 4, including be arranged in fusion zone 15 with respect to burner 9 on side wall, Heat storage 10a, 10b in regenerator 10, regenerator, gas pipeline 13a, 13b, flue gas and air common conduit 19a, 19b, four Logical reversal valve 20, flue 12, flue gas processing device 21, air blower 11, air-introduced machine 22.The operation principle of heat-accumulation combustion is, Regenerative combustion technology is relied primarily in fusion zone 15 and provides heat for fusing.Exemplified by melting two area 15b, it is relied primarily on Low cost combustion gas burnt, in the state of amount of consumed gas is relatively fewer in-furnace temperature be can be up to 1500 DEG C with On.

Heat-storage type burner operation principle is, when right side burner combustion, as shown in figure 3, arrow represents that air-flow is walked in way To.Cold conditions air enters to enter to be provided with by flue gas and air common conduit 19a after four-way reversing valve 20 via air blower 11 to be stored Hot body 10a regenerator, now heat storage 10a is in the condition of high temperature, and temperature is up to more than 1000 DEG C, and main material can be honeybee The high refractory material of the heat exchange efficiency such as nest body and Ceramic Balls.Cold conditions air is exchanged heat when passing through heat storage 10a with it, cold conditions Air is heated to form the high temperature air that temperature is up to 1000 DEG C, and heat storage 10a temperature is then gradually reduced.Now gas pipeline 13a is in open mode, and 13b is closed.The combustion gas entered by gas pipeline 13a passes through after being pre-mixed with high temperature air Burner, which is injected in fusion zone 15, to be burnt, and ignition temperature can reach more than 1500 DEG C.Due to the effect of air-introduced machine 22, melt The high-temperature flue gas changed in area's internal furnace is entered in the regenerator provided with heat storage 10b by drainage, and now heat storage 10b is in temperature Compared with low state, temperature is below 500 DEG C, and its material is identical with preceding addressed heat storage 10a.Enter out of fusion zone burner hearth High-temperature flue gas carries out the heat exchange of high-temperature flue gas and heat storage by the heat storage 10b of low temperature, and heat storage 10b is gradually heated to More than 1000 DEG C, and high-temperature flue gas is cooled to less than 250 DEG C, passes through flue gas and air common conduit 19b and four-way reversing valve Enter flue 12 after 20, air is discharged into after flue gas processing device 21.After certain time, gas pipeline 13a first Close, four-way reversing valve 20 commutates afterwards, and operation principle is as shown in figure 4, the cold conditions air blasted by air blower 11 passes through four-way Enter flue gas and air common conduit 19b after reversal valve 20, enter afterwards in the regenerator provided with heat storage 10b, due to four Heat storage 10b has been heated to more than 1000 DEG C before logical reversal valve 20 commutates, and cold conditions air is sent out after passing through heat storage 10b with it Raw heat exchange, cold conditions air, which is heated to 1000 DEG C or so, turns into high temperature air, and heat storage 10b is then gradually cooled down.Now combustion gas Pipeline 13b is opened, and combustion gas starts burning after being mixed with high temperature air, and combustion flame temperature can be up to more than 1500 DEG C.Due to High-temperature flue gas in the effect of air-introduced machine 22, fusion zone burner hearth is entered in the regenerator provided with heat storage 10a, temperature noted earlier The heat storage 10a of degree reduction is exchanged heat with high-temperature flue gas, and heat storage is gradually heated to more than 1000 DEG C, and high-temperature flue gas is then Be gradually cooled as it passes through the cooler to less than 250 DEG C, by after four-way reversing valve 20 after by flue 12, in the quilt of flue gas processing device 21 Discharged after purification.As described above, the burner alternation of the regenerator of left and right two 10, four-way reversing valve 20, gas pipeline 13 etc. Automated condtrol is used, arrangement of the regenerator burner on the side wall of fusion zone 15 is also using being in tilted layout, and the gradient is with melting The furnace bottom of area 15 is consistent, it is ensured that burner keeps optimum distance with material, improves heat conduction efficiency.

Embodiment one

A kind of system for handling lateritic nickel ore, lateritic nickel ore, reducing agent, additive are dried in drying materials system S100 Crushed after dry in crushing system S200, be well mixed made in formation system S400 in mixing system S300 according to a certain percentage Into pelletizing, pelletizing is entered into roasting system S600 progress reduction roastings after pelletizing drying system S500 drying and metallized Pelletizing, the additive added by metallized pellet and as needed is added in melting furnace system S700 by charging aperture 6, plus Smelting furnace system S700 structures are as shown in Figure 3：

Including furnace foundation 1, refractory material furnace bottom 2a, 2b, built-in cooling Copper Water Jacket are built into by refractory brick and refractory material Body of heater side wall 3, the partition wall 4 between fusion zone 15 and decanting zone 16, the furnace roof 5 above burner hearth, located at fusion zone The charging aperture 6 of the top of 15 furnace roof 5, slag exit 7 and thermal state metal outlet 8 positioned at the lower section of decanting zone 16, positioned at fusion zone 15 Heat storage 10a, 10b inside 4 groups of heat-storage type burner burners 9, regenerator 10 on opposite sides wall, air blower 11, flue gas Pipeline 12, gas pipeline 13a, 13b are placed in the graphite electrode 14 of decanting zone furnace roof.

Smelting furnace is divided into fusion zone 15, decanting zone 16, and fusion zone 15 is also divided into one area 15a of fusing and melts two area 15b, melts Change an area 15a corresponding with refractory material furnace bottom 2a, two area 15b of fusing are corresponding with refractory material furnace bottom 2b, and two area's furnace bottom length Than for 1：The furnace bottom angle that 3, one area 15a of fusing furnace bottom angle is 1 °, melt two area 15b is 3 °, partition wall 4 and refractory-lined ovens bottom 2 Distance be 500mm, fusion zone 15 is arranged symmetrically in decanting zone both sides, and the furnace bottom of fusion zone 15 is higher than the furnace bottom of decanting zone 16.

Solid material 17 is put into the area 15a of fusion zone one by charging aperture 6, is produced by heat-accumulating burner using heavy oil combustion Material in raw fast heating at high temperature fusion zone, obtains flowable melt, flows into two area 15b of fusing；Flowable melt is in fusing In two area 15b, the high-temperature heating that fuel gas buring is produced is utilized by heat-accumulating burner, decanting zone 16 is flowed into after fusing separation.

In decanting zone 16, by the molten bath 18 of the melt composition liquid constantly entered from fusion zone 15, in the stove of decanting zone 16 Top 5 is through there is graphite electrode 14, and graphite electrode 14 is inserted into molten bath 18, utilizes electric arc heated insulation molten bath, it is ensured that slag with The separation of thermal state metal, isolated high-grade nickel Tie Tong crosses metal outlet 8 and discharged；Subsequent slag continues to add in molten bath Metal oxide and graphite electrode reaction generation low ore grade nickel ferrous metal in heat, slag, are discharged, finally by metal outlet 8 Slag is discharged by slag exit 7.

Embodiment two

A kind of system for handling lateritic nickel ore, lateritic nickel ore, reducing agent, additive are dried in drying materials system S100 Crushed after dry in crushing system S200, be well mixed made in formation system S400 in mixing system S300 according to a certain percentage Into pelletizing, pelletizing is entered into roasting system S600 progress reduction roastings after pelletizing drying system S500 drying and metallized Pelletizing, the additive added by metallized pellet and as needed is added in melting furnace system S700 by charging aperture 6, Melting furnace system S700 structures are as shown in Figure 3：

Including furnace foundation 1, refractory material furnace bottom 2a, 2b, built-in cooling Copper Water Jacket are built into by refractory brick and refractory material Body of heater side wall 3, the partition wall 4 between fusion zone and decanting zone, the furnace roof 5 above burner hearth, located at the stove of fusion zone 15 The charging aperture 6 of the top of top 5, slag exit 7 and thermal state metal outlet 8 positioned at the lower section of decanting zone 16 are relative positioned at fusion zone 15 Heat storage 10a, 10b inside 3 groups of heat-storage type burner burners 9, regenerator 10 in both walls, air blower 11, flue 12, gas pipeline 13a, 13b are placed in the graphite electrode 14 of the furnace roof 5 of decanting zone 16.

Smelting furnace is divided into fusion zone 15, decanting zone 16, and fusion zone 15 is also divided into one area 15a of fusing and melts two area 15b, melts Change an area 15a corresponding with refractory material furnace bottom 2a, two area 15b of fusing are corresponding with refractory material furnace bottom 2b, and two area's furnace bottom length Than for 1：The furnace bottom angle that 6, one area 15a of fusing furnace bottom angle is 2 °, melt two area 15b is 4 °, partition wall 4 and refractory-lined ovens bottom 2 Distance be 650mm, fusion zone 15 is arranged symmetrically in the both sides of decanting zone 16, and the furnace bottom of fusion zone 15 is higher than the furnace bottom of decanting zone 16.

Solid material 17 is put into the area 15a of fusion zone one by charging aperture 6, is produced by heat-accumulating burner using heavy oil combustion Material in raw fast heating at high temperature fusion zone 15, obtains flowable melt, flows into two area 15b of fusing；Flowable melt is molten Change in two area 15b, the high-temperature heating that fuel gas buring is produced is utilized by heat-accumulating burner, decanting zone 16 is flowed into after fusing separation.

In decanting zone 16, by the molten bath 18 of the melt composition liquid constantly entered from fusion zone 15, in the stove of decanting zone 16 Top is through there is graphite electrode 14, and graphite electrode 14 is inserted into molten bath 18, utilizes electric arc heated insulation molten bath 18, it is ensured that slag with The final separation of thermal state metal, isolated high-grade nickel Tie Tong crosses metal outlet 8 and discharged；Subsequent slag continues in molten bath Metal oxide and graphite electrode reaction generation low ore grade nickel ferrous metal in heating, slag, are discharged, most by metal outlet 8 Whole slag is discharged by slag exit 7.

Embodiment three

A kind of system for handling lateritic nickel ore, lateritic nickel ore, reducing agent, additive are dried in drying materials system S100 Crushed after dry in crushing system S200, be well mixed made in formation system S400 in mixing system S300 according to a certain percentage Into pelletizing, pelletizing is entered into roasting system S600 progress reduction roastings after pelletizing drying system S500 drying and metallized Pelletizing, the additive added by metallized pellet and as needed is added in melting furnace system S700 by charging aperture 6, Melting furnace system S700 structures are as shown in Figure 3：

Including furnace foundation 1, refractory material furnace bottom 2a, 2b, built-in cooling Copper Water Jacket are built into by refractory brick and refractory material Body of heater side wall 3, the partition wall 4 between fusion zone 15 and decanting zone 16, the furnace roof 5 above burner hearth, located at fusion zone The charging aperture 6 of the top of 15 furnace roof 5, slag exit 7 and thermal state metal outlet 8 positioned at the lower section of decanting zone 16, positioned at fusion zone 15 Heat storage 10a, 10b inside 10 groups of heat-storage type burner burners 9, regenerator 10 on opposite sides wall, air blower 11, cigarette Feed channel 12, gas pipeline 13a, 13b are placed in the graphite electrode 14 of decanting zone furnace roof.

Smelting furnace is divided into fusion zone 15, decanting zone 16, and fusion zone 15 is also divided into one area 15a of fusing and melts two area 15b, melts Change an area 15a corresponding with refractory material furnace bottom 2a, two area 15b of fusing are corresponding with refractory material furnace bottom 2b, and two area's furnace bottom length Than for 1：The furnace bottom angle that 10, one area 15a of fusing furnace bottom angle is 3 °, melt two area 15b is 3 °, partition wall 4 and refractory-lined ovens bottom 2 Distance be 800mm, fusion zone 15 is arranged symmetrically in the both sides of decanting zone 16, and the furnace bottom of fusion zone 15 is higher than the furnace bottom of decanting zone 16.

Solid material 17 is put into the area 15a of fusion zone one by charging aperture 6, is produced by heat-accumulating burner using heavy oil combustion Material in raw fast heating at high temperature fusion zone, obtains flowable melt, flows into two area 15b of fusing；Flowable melt is in fusing In two area 15b, the high-temperature heating that fuel gas buring is produced is utilized by heat-accumulating burner, decanting zone 16 is flowed into after fusing separation.

In decanting zone 16, by the molten bath 18 of the melt composition liquid constantly entered from fusion zone 15, in the stove of decanting zone 16 Top is through there is graphite electrode 14, and graphite electrode 14 is inserted into molten bath 18, and molten bath is incubated using electric arc heated, it is ensured that slag and heat The final separation of state metal, isolated high-grade nickel Tie Tong crosses metal outlet 8 and discharged；Subsequent slag continues to add in molten bath Metal oxide and graphite electrode reaction generation low ore grade nickel ferrous metal in heat, slag, are discharged, finally by metal outlet 8 Slag is discharged by slag exit 7.

Embodiment four

A kind of system for handling lateritic nickel ore, lateritic nickel ore, reducing agent, additive are dried in drying materials system S100 Crushed after dry in crushing system S200, be well mixed made in formation system S400 in mixing system S300 according to a certain percentage Into pelletizing, pelletizing is entered into roasting system S600 progress reduction roastings after pelletizing drying system S500 drying and metallized Pelletizing, the additive added by metallized pellet and as needed is added in melting furnace system S700 by charging aperture 6, Melting furnace system S700 structures are as shown in Figure 3：

Including furnace foundation 1, refractory material furnace bottom 2a, 2b, built-in cooling Copper Water Jacket are built into by refractory brick and refractory material Body of heater side wall 3, the partition wall 4 between fusion zone 15 and decanting zone 16, the furnace roof 5 above burner hearth, located at fusion zone Charging aperture 6 above furnace roof, slag exit 7 and thermal state metal outlet 8 positioned at the lower section of decanting zone 16, positioned at the phase of fusion zone 15 To 5 groups of heat-storage type burner burners 9 in both walls, heat storage 10a, 10b inside regenerator 10, air blower 11, fume pipe Road 12, gas pipeline 13a, 13b are placed in the graphite electrode 14 of decanting zone furnace roof.

Smelting furnace is divided into fusion zone 15, decanting zone 16, and fusion zone 15 is also divided into one area 15a of fusing and melts two area 15b, melts Change an area 15a corresponding with refractory material furnace bottom 2a, two area 15b of fusing are corresponding with refractory material furnace bottom 2b, and two area's furnace bottom length Than for 1：The furnace bottom angle that 8, one area 15a of fusing furnace bottom angle is 1 °, melt two area 15b is 3 °, partition wall 4 and refractory-lined ovens bottom 2 Distance be 500mm, fusion zone 15 is arranged symmetrically in the both sides of decanting zone 16, and the furnace bottom of fusion zone 15 is higher than the furnace bottom of decanting zone 16.

Solid material 17 is put into the area 15a of fusion zone one by charging aperture 6, is produced by heat-accumulating burner using heavy oil combustion Material in raw fast heating at high temperature fusion zone, obtains flowable melt, flows into two area 15b of fusing；Flowable melt is in fusing In two area 15b, the high-temperature heating that fuel gas buring is produced is utilized by heat-accumulating burner, decanting zone 16 is flowed into after fusing separation.

By the molten bath 18 of the melt composition liquid constantly entered from fusion zone 15 in decanting zone 16, in the furnace roof of decanting zone 15 Through there is graphite electrode 14, graphite electrode 14 is inserted into molten bath 18, utilize electric arc heated insulation molten bath, it is ensured that slag with it is hot The final separation of metal, isolated high-grade nickel Tie Tong crosses metal outlet 8 and discharged；Subsequent slag continues to add in molten bath Metal oxide and graphite electrode reaction generation low ore grade nickel ferrous metal in heat, slag, are discharged, finally by metal outlet 8 Slag is discharged by slag exit 7.

Embodiment five

A kind of system for handling lateritic nickel ore, lateritic nickel ore, reducing agent, additive are dried in drying materials system S100 Crushed after dry in crushing system S200, be well mixed made in formation system S400 in mixing system S300 according to a certain percentage Into pelletizing, pelletizing is entered into roasting system S600 progress reduction roastings after pelletizing drying system S500 drying and metallized Pelletizing, the additive added by metallized pellet and as needed is added in melting furnace system S700 by charging aperture 6, Melting furnace system S700 structures are as shown in Figure 3：

Including furnace foundation 1, refractory material furnace bottom 2a, 2b, built-in cooling Copper Water Jacket are built into by refractory brick and refractory material Body of heater side wall 3, the partition wall 4 between fusion zone 15 and decanting zone 16, the furnace roof 5 above burner hearth, located at fusion zone Charging aperture 6 above furnace roof, slag exit 7 and thermal state metal outlet 8 positioned at the lower section of decanting zone 16, positioned at the phase of fusion zone 15 To 7 groups of heat-storage type burner burners 9 in both walls, heat storage 10a, 10b inside regenerator 10, air blower 11, fume pipe Road 12, gas pipeline 13a, 13b are placed in the graphite electrode 14 of decanting zone furnace roof.

Smelting furnace is divided into fusion zone 15, decanting zone 16, and fusion zone 15 is also divided into one area 15a of fusing and melts two area 15b, melts Change an area 15a corresponding with refractory material furnace bottom 2a, two area 15b of fusing are corresponding with refractory material furnace bottom 2b, and two area's furnace bottom length Than for 1：The furnace bottom angle that 4, one area 15a of fusing furnace bottom angle is 3 °, melt two area 15b is 4 °, partition wall 4 and refractory-lined ovens bottom 2 Distance be 500mm, fusion zone 15 is arranged symmetrically in the both sides of decanting zone 16, and the furnace bottom of fusion zone 15 is higher than the furnace bottom of decanting zone 16.

Solid material 17 is put into the area 15a of fusion zone one by charging aperture 6, is produced by heat-accumulating burner using heavy oil combustion Material in raw fast heating at high temperature fusion zone 15, obtains flowable melt, flows into two area 15b of fusing；Flowable melt is molten Change in two area 15b, the high-temperature heating that fuel gas buring is produced is utilized by heat-accumulating burner, decanting zone 16 is flowed into after fusing separation.

In decanting zone 16, by the molten bath 18 of the melt composition liquid constantly entered from fusion zone 15, in the stove of decanting zone 16 Top is through there is graphite electrode 14, and graphite electrode 14 is inserted into molten bath 18, and molten bath is incubated using electric arc heated, it is ensured that slag and heat The final separation of state metal, isolated high-grade nickel Tie Tong crosses metal outlet 8 and discharged；Subsequent slag continues to add in molten bath Metal oxide and graphite electrode reaction generation low ore grade nickel ferrous metal in heat, slag, are discharged, finally by metal outlet 8 Slag is discharged by slag exit 7.

The utility model is further described below in conjunction with specific embodiment 1-3：

Embodiment 1

Certain lateritic nickel ore, nickel grade 0.89%, Iron grade 29.57%；Certain reducing agent uses semi-coke, its fixed carbon 83%； The CaO content 50% of lime stone.

Below 2mm is crushed to after lateritic nickel ore, anthracite, lime stone are dried, according to lateritic nickel ore：Anthracite：Stone Lime stone=100:20:5 ratio is well mixed and pelletizing is made.

Reduction roasting is carried out after pelletizing is dried, 1250 DEG C of sintering temperature, roasting time 25min obtains metallized pellet Degree of metalization be 80%.

Metallized pellet is put into melting furnace by charging aperture:1200 DEG C of area's temperature is melted, two area's temperature are melted 1300 DEG C of degree, fusion zone oxygen content 8%.

1500 DEG C of decanting zone temperature, melt is in decanting zone time 15min；Slag is in decanting zone time 80min.

The product obtained：The nickel content 17.35% of high-grade ferronickel, iron content 78.57%；The iron of low-grade ferronickel contains Amount 94.41%, nickel content 2.01%.

Embodiment 2

Certain lateritic nickel ore, nickel grade 1.51%, Iron grade 19.87%；Certain reducing agent uses anthracite, its fixed carbon 76%.

Below 2mm is crushed to after lateritic nickel ore, anthracite are dried, according to lateritic nickel ore：Anthracite=100:22 Ratio is well mixed and pelletizing is made.

Reduction roasting is carried out after pelletizing is dried, 1280 DEG C of sintering temperature, roasting time 20min obtains metallized pellet Degree of metalization be 82%.

Metallized pellet and its quick lime of quality 5% are put into melting furnace by charging aperture.Melting an area 1300 DEG C of temperature, melts 1500 DEG C of two area's temperature, fusion zone oxygen content 12%.

1800 DEG C of decanting zone temperature, melt is in decanting zone time 20min.Slag is in decanting zone time 60min.

The product obtained：The nickel content 20.63% of high-grade ferronickel, iron content 76.71%；The iron of low-grade ferronickel contains Amount 95.41%, nickel content 1.97%.

Embodiment 3

Certain lateritic nickel ore, nickel grade 2.33%, Iron grade 17.62%；Certain reducing agent uses anthracite, its fixed carbon 86%；The CaO content 50% of lime stone.

Below 2mm is crushed to after lateritic nickel ore, anthracite, lime stone are dried, according to lateritic nickel ore：Anthracite：Stone Lime stone=100:15:15 ratio is well mixed and pelletizing is made.

Reduction roasting is carried out after pelletizing is dried, 1200 DEG C of sintering temperature, roasting time 35min obtains metallized pellet Degree of metalization be 74%.

Metallized pellet is put into melting furnace by charging aperture, in 1400 DEG C of one area's temperature of fusing, two area's temperature are melted 1700 DEG C of degree, fusion zone oxygen content 15%.

1800 DEG C of decanting zone temperature, melt is in decanting zone time 30min, and slag is in decanting zone time 40min.

The product obtained：The nickel content 18.35% of high-grade ferronickel, iron content 78.57%；The iron of low-grade ferronickel contains Amount 94.02%, nickel content 2.57%.

Simply a kind of embodiment of the present utility model, but protection domain of the present utility model is not limited to described above This.It can also be realized by following several ways.

1. double heat storage type combustion technology can be used in heat-storage type burner, both using high temperature air, also using high temperature Combustion gas, heat both is from high-temperature flue gas in smelting furnace fusion zone.

2. setting high temperature fume dust removal device before heat storage can be entered by high-temperature flue gas in smelting furnace, for protecting accumulation of heat Body, is not etched or blocks.

3. can be burnt using oxygen-enriched as combustion-supporting gas by heat-storage type burner, combustion gas use can be further reduced Amount, and improve melting in-furnace temperature.

4. the thermal source that an area uses other exotic fuels to be produced as high density energy is being melted, in two fusion zones Different furnace bottom angles is used according to different fuel, melting materialss.

Claims (5)

1. a kind of system for handling lateritic nickel ore, it is characterised in that including：Melting furnace system (S700)；Wherein, it is described to add Smelting furnace system (S700) includes being located at the body of heater on furnace foundation (1), and body of heater includes side wall (3), furnace roof (5) and fire resisting Furnace bottom (2a, 2b) is constituted, it is characterised in that the burner hearth of body of heater is divided into fusion zone by the partition wall (4) extended downwardly from furnace roof (15) with the part of decanting zone (16) two；Wherein, decanting zone (16) furnace bottom is less than fusion zone (15) furnace bottom；Wherein, fusion zone (15) furnace bottom is designed using tilting, and one end adjacent with decanting zone (16) tilts down and communicated with decanting zone (16)；Its In, described fusion zone (15) is divided into fusing one area (15a) and fusing 2nd area (15b), and it is higher that fusing one area (15a) is located at furnace bottom One end, fusing 2nd area (15b) it is adjacent with decanting zone (16)；Melt an area (15a) corresponding with refractory material furnace bottom (2a), melt 2nd area (15b) are corresponding with refractory material furnace bottom (2b)；Burner is provided with relative both walls in fusion zone (15)；In sedimentation Area (16) is provided with the graphite electrode (14) through furnace roof, and the slag discharged for slag is respectively equipped with the bottom of decanting zone (16) and is gone out Mouth (7) and the thermal state metal outlet (8) discharged for thermal state metal.

2. system according to claim 1, it is characterised in that fusing one area (15a) furnace bottom angle of inclination 1~3 ° it Between, fusing 2nd area (15b) furnace bottom angle of inclination is between 3~5 °.

3. system according to claim 1, it is characterised in that partition wall (4) and refractory-lined ovens bottom (2a, 2b) have it is certain away from From, it is allowed to melt in fusion zone (15) can by and flow into decanting zone (16).

4. system according to claim 1, it is characterised in that be located at decanting zone for the slag exit (7) of slag discharge (16) middle and upper part, the bottom of decanting zone (16) is located at for the thermal state metal outlet (8) that thermal state metal is discharged；Described body of heater Side wall (3), furnace roof (5) and furnace foundation (1) are built into using refractory material and refractory brick, wherein in side wall (3) and furnace roof (5) Built-in cooling Copper Water Jacket.

5. system according to claim 1, it is characterised in that the described area of fusing one (15a) and fusing 2nd area (15b) Furnace bottom length ratio is 1：3~10.