CN103602828B - Method and device for producing zinc alloy used for hot dipping by using zinc slag - Google Patents
Method and device for producing zinc alloy used for hot dipping by using zinc slag Download PDFInfo
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- CN103602828B CN103602828B CN201310481369.4A CN201310481369A CN103602828B CN 103602828 B CN103602828 B CN 103602828B CN 201310481369 A CN201310481369 A CN 201310481369A CN 103602828 B CN103602828 B CN 103602828B
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Abstract
The invention discloses a method and a device for producing a zinc alloy used for hot dipping by using zinc slag. The method comprises the following steps of 1) adding materials for a first time and removing slag for the first time; 2) keeping warm and removing residues; 3) rectifying and heat-exchanging; 4) condensing; 5) re-adding the materials for circulation; 6) preparing the alloy: adding aluminium element in condensed No. 0 zinc liquid according to requirements, and mixing uniformly to cast a alloy ingot. The invention also provides a device for producing the zinc alloy used for hot dipping by using the zinc slag. The method is reasonable in process arrangement and low in production cost, greatly reduces in energy consumption, reduces potential risks, can control the whole production process, and realizes cyclic utilization of resources.
Description
Technical field
The present invention relates to zinc slag purification technical field, specifically refer to a kind of method and apparatus utilizing cadmia production hot dip zinc alloy.
Background technology
At present for zinc residue produced in hot zinc plating purifying zinc, there are two kinds of main method:
One is rectification under vacuum method, as the Chinese patent that the patent No. is " 911018409 " " hot galvanizing residue rectification under vacuum zinc extraction method and equipment thereof " by name, this invention realizes in one horizontal, round shape vacuum oven, point evaporating area and condensing zone feeding-in solid body and slag tap in stove, liquid discharge metal.Intermittent operation, heating element are that three groups of Y-connected Graphite Electrodess of tabular heat on the top of evaporating area.Control furnace temperature 700 ~ 1000 DEG C, vacuum tightness 133.3 × 10 to 133.3 × 10
-1handkerchief.Rectifying product is impure and determine according to raw material, can obtain 1, No. 2 zinc.Find that this rectification under vacuum purification cadmia exists major defect and is through practice: the physics component of final product can not reach 0# zinc standard, and reconstituted product added value is low;
Two is patent No.s is " 200710159251.4 " " zinc slag purification method and purifying plant " by name, the method is that cadmia is admitted to by material feeder the rectifying tower rectifying that its chamber temperature is 1000 ~ 1300 DEG C after the smelting furnace fusing that temperature is 500 ~ 700 DEG C, zinc fume after evaporation becomes pure zinc liquid through the condenser condenses that temperature is 700 ~ 850 DEG C, flow into Chu Xinchi, be molded into 0# zinc zinc ingot metal through alloy; The unevaporated zinc liquid of rectifying tower flows into liquating furnace through lower extending part, and the large and small pond temperature of liquating furnace is respectively 400 ~ 750 DEG C and 500 ~ 750 DEG C, and the cadmia ash produced through liquating furnace process is discharged by cinder notch, and B# zinc is transported back smelting furnace and entered next circulation.The method can produce 0# zinc, but this patented method and device are only applicable to zinc content hot galvanizing residue more than 99%, and purification rate just can reach more than 80%, and output capacity is lower; Two are energy medium in device is coke oven and blast furnace mixed gas, has the potential safety hazard causing CO poisoning; Three is reinforced in smelting furnace, repeat to cause energy consumption, technique can carry out fusing cadmia without this device completely, facts have proved, complete can carry out liquate fusing to cadmia with the waste heat of refining furnace, not only can reduce energy consumption, accelerate burn-off rate, improve liquate effect, decrease oxidative slagging amount.
Summary of the invention
Object of the present invention is exactly overcome in prior art to be only applicable to the requirement of hot galvanizing residue, poisoning hidden danger that coal gas may bring, the output capacity that overcomes technogenic influence to cadmia, and provides a kind of method and apparatus utilizing cadmia production hot dip zinc alloy.
For achieving the above object, the method utilizing cadmia production hot dip zinc alloy provided by the invention, it comprises the steps:
1) first time feeds in raw material and removes the gred for the first time: in refining furnace, add cadmia and heat to cadmia; Obtain B# zinc liquid and scum silica frost after liquate, scum silica frost is discharged as first time slagging-off through refining furnace except cinder notch;
2) insulation removes the gred with second time: the B# zinc liquid obtained in step 1) is delivered to be incubated in gauger through zinc contracted affreightment and is incubated, and carries out second time slagging-off, and the slag notch of scum silica frost through being incubated gauger is discharged;
3) rectifying and heat exchange: by step 2) in quantitatively to input through the zinc liquid that remove the gred of second time and be arranged with rectifying in the rectifying tower of combustion chamber outward, the zinc liquid obtaining zinc fume and fail to evaporate takes the remaining zinc that slips of foreign metal formation;
4) condensation: the zinc fume after rectifying obtains 0# zinc liquid through condensation;
5) feeding cycle again: the remaining zinc that slips in rectifying tower flows into refining furnace, the zinc oxidative slagging that the remaining zinc that slips produces through refining furnace process and foreign metal are discharged by the cinder notch of refining furnace, and slipping after the Yu Xinyu B# zinc liquid-phase mixing that charge melted cadmia obtains again after liquate purification returns step 2) circulation;
6) alloy is prepared: condensed 0# zinc liquid casts alloy pig through allocating into as required after aluminium element mixes.
Preferably, in described step 6), condensed 0# zinc liquid directly inputs in line-frequency induction cored electric furnace casts alloy pig.
Further, the smelting temperature of described line-frequency induction cored electric furnace controls at 460 ~ 480 DEG C.
The present invention also provides a kind of for realizing the equipment utilizing cadmia production hot dip zinc alloy that aforesaid method designs, comprise refining furnace, insulation gauger, rectifying tower, condenser, Chu Xinchi, combustion chamber and chimney, it is characterized in that: the output terminal of insulation gauger is connected with the import of rectifying tower through filling tube by automatic feeding device, the top zinc fume outlet of rectifying tower is connected with the input terminus of condenser by chute, the output terminal of condenser is connected with the entrance of Chu Xinchi, and the outlet of Chu Xinchi is connected with electric furnace; The bottom of rectifying tower is slipped the outlet of remaining zinc and is connected with the input terminus of refining furnace along pipeline by lower, and the output terminal of refining furnace is connected with the input terminus of insulation gauger; Rectifying tower is arranged on combustion chamber, and the natural gas input of combustion chamber is connected with system steam line, and the tail gas output terminal of combustion chamber is connected with chimney.
Preferably, it also comprises Heat Room, and the tail gas output terminal of combustion chamber is connected with the exhaust gas inlet C of Heat Room, and the waste gas outlet D of Heat Room is connected with chimney, the air intlet A of Heat Room communicates with air, and the air vout B of Heat Room is connected with the air input of combustion chamber.
Further, described electric furnace is frequency cored induction furnace, and the import of described frequency cored induction furnace is connected with the outlet of Chu Xinchi by pipeline, and the outlet of frequency cored induction furnace is connected with alloy mould.
Further, described rectifying tower is combined by SiC section bar dish.
Further, described refining furnace is combined by anterior melting pool and rear portion treating pond.
The invention has the advantages that: present invention process is rationally distributed, production cost is low, adopt the energy consumption that consecutive production greatly reduces, adopt Sweet natural gas can avoid the poisoning potential safety hazard brought of CO, by instrument feedback temperature, can control production whole process, improve body of heater work-ing life, high-quality 0# zinc of purifying out can directly enter next procedure produce hot dip zinc return cold rolling hot dip galvanizing production line continue use, achieve resource circulation utilization.
Accompanying drawing explanation
Fig. 1 is equipment connection schematic diagram of the present invention.
In figure: refining furnace 1, insulation gauger 2, filling tube 3, rectifying tower 4, chute 5, condenser 6, storage zinc pond 7, frequency cored induction furnace 8, alloy mould 9, combustion chamber 10, Heat Room 11, lower along portion 12, chimney 13.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in the figure, the present invention utilizes the equipment of cadmia production hot dip zinc alloy, comprise refining furnace 1, insulation gauger 2, rectifying tower 4, condenser 6, storage zinc pond 7, combustion chamber 10 and chimney 13, it is characterized in that: the output terminal of insulation gauger 2 is connected through the import of filling tube 3 with rectifying tower 4 by automatic feeding device, the top zinc fume outlet of rectifying tower 4 is connected by the input terminus of chute 5 with condenser 6, the output terminal of condenser 6 is connected with the entrance in storage zinc pond 7, and the outlet in storage zinc pond 7 is connected with electric furnace; The bottom of rectifying tower 4 is slipped the outlet of remaining zinc and is connected along the input terminus of pipeline 12 with refining furnace 1 by lower, and the output terminal of refining furnace 1 is connected with the input terminus of insulation gauger 2; It is inner that rectifying tower 4 is arranged on combustion chamber 10, and the natural gas input of combustion chamber 10 is connected with system steam line, and the tail gas output terminal of combustion chamber 10 is connected with chimney 13.
It also comprises Heat Room 11, the tail gas output terminal of combustion chamber 10 is connected with the exhaust gas inlet C of Heat Room 11, the waste gas outlet D of Heat Room 11 is connected with chimney 13, and the air intlet A of Heat Room 11 communicates with air, and the air vout B of Heat Room 11 is connected with the air input of combustion chamber 10; Electric furnace is frequency cored induction furnace 8, and the import of frequency cored induction furnace 8 is connected by the outlet of pipeline with storage zinc pond 7, and the outlet of frequency cored induction furnace 8 is connected with alloy mould 9; Rectifying tower 4 is combined by SiC section bar dish; Refining furnace 1 is combined by anterior melting pool and rear portion treating pond.
First cadmia utilizes pre-hot melt through refining furnace 1, and the zinc liquid temperature of refining furnace 1 controls at 600 ~ 650 DEG C.Zinc liquid after fusing sends into rectifying tower 4 rectifying by insulation gauger 2 through filling tube 3.Rectifying tower 4 is made up of SiC section bar, is connected with Heat Room 11 with combustion chamber 10, and air 15 and coal gas 16 send into combustion chamber 10 through Heat Room 11 respectively, and waste gas 17 is discharged from chimney 18, and the temperature out of waste gas is 400 ~ 600 DEG C.The temperature of rectifying tower combustion chamber 10 controls at 1050 ~ 1250 DEG C.Zinc fume after rectifying tower 4 evaporates, sends into condenser 6 through chute 5, through the condensing temperatures of 600 ~ 880 DEG C, zinc vapor condensing is become pure zinc liquid, flows into storage zinc pond 7, finally imports frequency cored induction furnace 8 and casts alloy pig 9.Foreign metal in rectifying tower 4 forms zinc more than high Wenliu with unevaporated zinc liquid and flows into refining furnace 1 through lower extending part 12.Refining furnace 1 is made up of melting pool and treating pond, and its temperature controls at 600 ~ 650 DEG C and 550 ~ 600 DEG C respectively, and the foreign metal melting zinc oxidative slagging and the backflow produced through refining furnace 1 is discharged by cinder notch, and the mixing zinc liquid after purification enters next circulation.
0# zinc liquid directly injects frequency cored induction furnace by chute, allocates appropriate aluminium or aluminium element Metal Production hot dip binary or polynary zinc alloy on demand into.
Be below 3 embodiments of zinc slag purification of the present invention, all adopt above-mentioned processing step, concrete technology parameter in table 1. raw materials used be slag at the bottom of zinc residue produced in hot zinc plating and hot-galvanized cauldron, its Chemical Composition is in table 2.The hot dip zinc steady quality of cadmia production hot dip zinc method output of the present invention is adopted through inspection.Table 3 is the Chemical Composition of embodiment of the present invention hot dip zinc finished product.Table 4 is zinc ingot metal composition national standard.
The smelting temperature of table 1 zinc residue produced in hot zinc plating
| Embodiment | Holding temperature | Spent air temperture | Chamber temperature | Condensing temperature | Temperature of fusion | Purification temperature |
| 1 | 600℃ | 600℃ | 1250℃ | 880℃ | 650℃ | 600℃ |
| 2 | 580℃ | 550℃ | 1150℃ | 750℃ | 620℃ | 550℃ |
| 3 | 550℃ | 450℃ | 1050℃ | 600℃ | 580℃ | 500℃ |
The Chemical Composition of table 2 zinc residue produced in hot zinc plating
The Chemical Composition (containing Al:0.55-0.6%) of table 3 finished product hot dip zinc ingot metal
Table 4 zinc ingot metal composition national standard
In the middle of rectifying, control refining furnace great Chi temperature, make to heat up in a steamer remaining zinc and be divided into three layers wherein: upper strata is leaded zinc, be without cadmium zinc or B# zinc.
Principle of work of the present invention and working process as follows:
Method cadmia regeneration being produced into hot dip zinc alloy of the present invention, the method comprises the following steps: the method utilizes each intermetallic principle that there are differences of vapour pressure at a certain temperature, 0# zinc liquid is obtained after being removed by cadmia foreign metal, directly inject frequency cored induction furnace by chute, allocate appropriate aluminium or aluminium element Metal Production hot dip binary or polynary zinc alloy on demand into.
Cadmia quantitatively inputs by insulation gauger the rectifying tower rectifying that its chamber temperature is 1050 ~ 1250 DEG C after the refining furnace that temperature is 600 ~ 700 DEG C utilizes delayed heat melting, zinc fume after evaporation becomes pure zinc liquid through the condenser condenses that temperature is 600 ~ 880 DEG C, direct input line-frequency induction cored electric furnace, casts alloy pig ingot through allocating into as required after aluminium element mixes; Fail in rectifying tower evaporate zinc liquid take foreign metal formed slip remaining zinc flow into refining furnace, the melting pool of refining furnace and treating pond temperature are respectively 600 ~ 650 DEG C and 550 ~ 600 DEG C, the zinc oxidative slagging produced through refining furnace process and foreign metal are discharged by cinder notch, and the remaining zinc that slips mixes return circulation with the zinc liquid of fusing after liquate purification.
The heating of rectifying tower of the present invention, refining furnace, dispensing mechanism all adopts Sweet natural gas heat supply with insulation; Line frequency furnace adopts electric heat supply.
No longer increasing heat energy when melting cadmia, utilizing and slipping remaining zinc waste heat and carried out fusing liquate process; Heating value of natural gas is high, and burning-point is low, and required air quantity is large, and therefore improve for traditional heat exchange chamber structure, waste heat is all concentrated for heat exchange air, increases air input and the heat interchanging area of air simultaneously, takes full advantage of waste heat, energy-saving and emission-reduction; Can add direct fusion in line frequency furnace after the 0# zinc liquid produced and produce the metallic element needed for alloy, proportioning produces pot galvanize alloy, eliminates the process links that hot-dip galvanized alloy produced by traditional employing master alloy.
The equipment of cadmia production hot dip zinc of the present invention is primarily of refining furnace, rectifying tower, condenser, frequency cored induction furnace composition, being linked as of technology chain: the zinc liquid that refining furnace fusing produces is connected with rectifying tower by insulation measuring apparatus, the top of container is connected with condenser by chute, and the 0# zinc liquid of condensation is connected with frequency cored induction furnace by storage zinc pond and picks out finished product hot dip zinc; The bottom of rectifying tower is connected with refining furnace closed loop.Rectifying tower of the present invention is made up of SiC section bar, is connected with Heat Room with combustion chamber, and air sends into combustion chamber through Heat Room, and natural gas straight taps into into combustion chamber, discharges after heating by the exhaust gases air through chimney; Refining furnace is made up of melting pool and treating pond; Frequency cored induction furnace is power frequency electric furnace.
Can add direct fusion in line frequency furnace after the 0# zinc liquid produced and produce the metallic element needed for alloy, proportioning produces pot galvanize alloy, eliminates the process links that hot-dip galvanized alloy produced by traditional employing master alloy.The such as patent No. is 200910094234.6, and " a kind of produce the combination metallurgical furnace of zinc alloy and the production combination method of zinc alloy " needs a frequency cored induction furnace and at least two line frequency coreless induction furnaces to produce.
The patent No. is 200910259545.3 " what propose in hot-dip galvanized alloy production method produces master alloy with line frequency coreless electric furnace " joins in cored electric furnace and produce hot-dip galvanized alloy, and the smelting temperature of power frequency cored electric furnace carries out between (500 ~ 540 DEG C).And only utilize a frequency cored induction furnace can production hot dip zinc alloy in this patent, and smelting temperature controls at 460 ~ 480 DEG C, the stirring body material of power frequency cored electric furnace is stainless steel, and zinc liquid temperature is lower, the ferrous components brought into when more can reduce stirring.Not only reduce equipment investment by this method, reduce the energy consumption of unit product, and do not cause segregation phenomena in application process.
The design of twice slagging-off operation of the present invention has the following advantages: the efficiency that 1, removes the gred is high; 2, security is high; 3, be not easy blocking, maintenance cost is low.
The liquid metal that plumbous tower fails to evaporate flows into liquating furnace through lower extending part, its waste heat energy effectively helps fusing newly to add cadmia raw material, after additional natural gas melt raw material, after waste residue floats over liquid metal surface, can once remove the gred, remove most of scum silica frost, through the liquid metal once removed the gred, handling is incubated to smelting furnace, between soak, carry out secondary slagging-off again, guarantees the cadmia purity entering tower tray, can effectively prevent tower tray from blocking, greatly reduce security incident to occur, and extend the work-ing life of plumbous tower, effectively reduce production cost.
Exchange hot cell in present device to transform: lacked coal gas flue, specifically have the following advantages: because Zinc Factory of Huludao produces in 0# zinc process, adopt coal gas as energy medium, waste gas of combustion chamber utilizes waste gas residual heat to entering the air of combustion chamber at Heat Room in by Heat Room chimney discharge process, coal gas carries out preheating, Heat Room cylinder brick owing to building by laying bricks or stones, duration of service etc. reason, the breakage of waste gas, coal gas, air containment flue is leaked, causes explosion hazard.For this reason, the present invention draws the lesson of above-mentioned security incident, and exchange hot cell has carried out redesigning transformation, natural gas line is directly passed into combustion chamber combustion, no longer through this link of Heat Room preheating, the situation that effectively prevent natural gas leaking occurs, and safety performance improves greatly.Since test is produced, there is not the situation of a cause leakage contribution safety in production, thoroughly solved potential safety hazard, guaranteed to produce and carry out smoothly.
Claims (8)
1. utilize a method for cadmia production hot dip zinc alloy, it comprises the steps:
1) first time feeds in raw material and removes the gred for the first time: add cadmia and heat to cadmia in refining furnace (1); Obtain B# zinc liquid and scum silica frost after liquate, scum silica frost removes the gred as first time through discharging except cinder notch of refining furnace (1);
2) insulation remove the gred with second time: step 1) in the B# zinc liquid that obtains deliver to be incubated in gauger (2) through zinc contracted affreightment and be incubated, and carry out second time and remove the gred, scum silica frost is through being incubated the slag notch discharge of gauger (2);
3) rectifying and heat exchange: by step 2) in quantitatively to input through the zinc liquid that remove the gred of second time and be arranged with rectifying in the rectifying tower (4) of combustion chamber (10) outward, the zinc liquid obtaining zinc fume and fail to evaporate takes the remaining zinc that slips of foreign metal formation;
4) condensation: the zinc fume after rectifying obtains 0# zinc liquid through condensation;
5) feeding cycle again: the remaining zinc that slips in rectifying tower (4) flows into refining furnace (1), the zinc oxidative slagging that the remaining zinc that slips produces through refining furnace (1) process and foreign metal are discharged by the cinder notch of refining furnace (1), and slipping after the Yu Xinyu B# zinc liquid-phase mixing that charge melted cadmia obtains again after liquate purification returns step 2) circulate;
6) alloy is prepared: condensed 0# zinc liquid casts alloy pig through allocating into as required after aluminium element mixes;
Described step 6) in, condensed 0# zinc liquid directly inputs in line-frequency induction cored electric furnace (8) casts alloy pig.
2. utilize the method for cadmia production hot dip zinc alloy according to claim 1, it is characterized in that: the smelting temperature of described line-frequency induction cored electric furnace (8) controls at 460 ~ 480 DEG C.
3. one kind for realizing the equipment utilizing cadmia production hot dip zinc alloy that method described in claim 1 designs, comprise refining furnace (1), insulation gauger (2), rectifying tower (4), condenser (6), Chu Xinchi (7), combustion chamber (10) and chimney (13), it is characterized in that: the output terminal of insulation gauger (2) is connected through the import of filling tube (3) with rectifying tower (4) by automatic feeding device, the top zinc fume outlet of rectifying tower (4) is connected by the input terminus of chute (5) with condenser (6), the output terminal of condenser (6) is connected with the entrance of Chu Xinchi (7), the outlet of Chu Xinchi (7) is connected with electric furnace, the bottom of rectifying tower (4) is slipped the outlet of remaining zinc and is connected along the input terminus of pipeline (12) with refining furnace (1) by lower, is provided with zinc liquid transfer limes between the output terminal of refining furnace (1) and the input terminus being incubated gauger (2), it is inner that rectifying tower (4) is arranged on combustion chamber (10), and the natural gas input of combustion chamber (10) is connected with system steam line, and the tail gas output terminal of combustion chamber (10) is connected with chimney (13).
4. utilize the equipment of cadmia production hot dip zinc alloy according to claim 3, it is characterized in that: it also comprises Heat Room (11), the tail gas output terminal of combustion chamber (10) is connected with the exhaust gas inlet (C) of Heat Room (11), the waste gas outlet (D) of Heat Room (11) is connected with chimney (13), the air intlet (A) of Heat Room (11) communicates with air, and the air vout (B) of Heat Room (11) is connected with the air input of combustion chamber (10).
5. according to claim 3 or 4, utilize the equipment of cadmia production hot dip zinc alloy, it is characterized in that: described electric furnace is frequency cored induction furnace (8), the import of described frequency cored induction furnace (8) is connected with the outlet of Chu Xinchi (7) by conveying groove, and the outlet of frequency cored induction furnace (8) is connected with alloy mould (9).
6. according to claim 3 or 4, utilize the equipment of cadmia production hot dip zinc alloy, it is characterized in that: described rectifying tower (4) is combined by SiC section bar dish.
7. utilize the equipment of cadmia production hot dip zinc alloy according to claim 5, it is characterized in that: described rectifying tower (4) is combined by SiC section bar dish.
8. according to claim 3 or 4, utilize the equipment of cadmia production hot dip zinc alloy, it is characterized in that: described refining furnace (1) is combined by anterior melting pool and rear portion treating pond.
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| CN104404422B (en) * | 2014-12-02 | 2017-05-10 | 无锡市新科冶金设备有限公司 | Preheating-type upwardly-heating steel wire zinc-plating furnace |
| CN108220640B (en) * | 2016-12-13 | 2019-12-13 | 鞍钢股份有限公司 | Method for manufacturing zinc alloy for hot dipping by using zinc slag |
| CN108588483B (en) * | 2018-04-26 | 2019-05-28 | 温州众齐新材料科技有限公司 | A kind of preparation process preparing kirsite using recycling cadmia |
| CN108588443A (en) * | 2018-05-17 | 2018-09-28 | 陕西日日新生物科技有限公司 | A kind of recycling plating cadmia prepares the circulation technology of kirsite |
| CN108677023B (en) * | 2018-06-15 | 2019-07-26 | 武汉钢实资源循环利用科技有限公司 | The method and device of cadmia fusing liquate |
| CN109338117A (en) * | 2018-12-05 | 2019-02-15 | 攀枝花钢城集团有限公司 | Utilize the process and its production system of hot galvanizing residue production kirsite |
| CN109894624B (en) * | 2019-04-12 | 2024-03-22 | 湖南新威凌新材料有限公司 | Zinc powder production system of vertical rectifying furnace |
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| CN101469372A (en) * | 2007-12-28 | 2009-07-01 | 鞍钢实业集团有限公司 | Method and apparatus for purifying zincilate |
| CN101979684B (en) * | 2010-12-01 | 2012-02-29 | 中南大学 | Process for recovering zinc from hot-dip coating zinc ash |
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Effective date of registration: 20211013 Address after: 430085 bingang Road (Machinery Factory), Qingshan District, Wuhan City, Hubei Province Patentee after: Wuhan Yangguang Industrial Co.,Ltd. resource recycling technology branch Address before: 430080 changqian Tiepu ridge, Qingshan District, Wuhan City, Hubei Province (back door of pipe company) Patentee before: WUHAN GANGSHI RESOURCES RECYCLING TECHNOLOGY Co.,Ltd. |