CN101947653A - Device and method for preparing zinc powder and pulp - Google Patents
Device and method for preparing zinc powder and pulp Download PDFInfo
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- CN101947653A CN101947653A CN 201010502241 CN201010502241A CN101947653A CN 101947653 A CN101947653 A CN 101947653A CN 201010502241 CN201010502241 CN 201010502241 CN 201010502241 A CN201010502241 A CN 201010502241A CN 101947653 A CN101947653 A CN 101947653A
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Abstract
The embodiment of the invention discloses a device for preparing zinc powder and pulp. The device for preparing zinc powder comprises a zinc melting furnace, an electrically-heated insulated flow pipe, a heat preserving furnace, an atomizing nozzle, an atomizing tower, a high pressure water system, a wet vibrating screen and a segmented settling tank, wherein the heat preserving furnace and the zinc melting furnace constitute a U-shaped communicating vessel by the electrically-heated insulated flow pipe, and the zinc melting furnace, the electrically-heated insulated flow pipe and the heat preserving furnace constitute a horizontal and steady liquid-zinc flow channel, thereby ensuring that the liquid level of the liquid zinc in the heat preserving furnace is constant and the liquid zinc is clean, the flow velocity, flow quantity and temperature of the liquid zinc flowing out of the heat preserving furnace are stable, and then realizing the continuous stable production of the zinc powder. In addition, in the invention, the liquid zinc can be atomized by a high pressure atomized water flow without air atomization, which avoids the zinc powder from contacting with air, therefore, the prepared zinc powder has the advantages of no oxide film on the surface, small and uniform particle size, large specific surface area and good activity, and is helpful for the smooth processing of the zinc hydrometallurgy.
Description
Technical field
The present invention relates to the zinc powder preparing technical field, more particularly, relate to a kind of preparation and pulping apparatus and method of zinc powder.
Background technology
In recent years, wet zinc smelting method has obtained swift and violent development, and production capacity increases rapidly.In Zinc hydrometallurgy process, zinc powder is used as displacer owing to having negative standard electrode potential and bigger specific area and chemism in Zinc hydrometallurgy process.In Zinc hydrometallurgy process, the purifying and replacing reaction is mainly the heterogeneous contact reaction of carrying out on the zinc powder surface, and therefore, the specific area of zinc powder is the key factor that influences displacement reaction, and the specific area of zinc powder heals big, and displacement reaction is carried out more rapidly and be complete.For zinc powder, because the specific area and the granularity relation of being inversely proportional to of zinc powder, promptly the particle diameter of zinc powder is more little, and specific area is big more, carries out thereby help successful reaction.Therefore, the Zinc hydrometallurgy process requirement is little as the zinc powder particle diameter of displacer, specific area big, the activity is good.
At present, zinc powder mainly adopts zinc ingot metal, separates out zinc or high temperature zinc calcine and other material containing zinc and form through indirect method, direct method or electric reduction process processing and preparing.Domestic zinc smeltery displacement zinc powder preparation method commonly used is the air atomizing method, and soon zinc liquid is blown out vaporific with compressed air and directly be cooled to zinc powder rapidly in closed container.As shown in Figure 1, the air atomizing legal system preparation facilities that is equipped with zinc powder comprises: zinc-melting furnace 101, siphon powder blower 102, air compressor 103, expansion chamber 104 and bagroom 105.The preparation process of zinc powder is: metallic zinc is through zinc-melting furnace 101 fusings, zinc liquid after the fusing is introduced in the siphon powder blower 102, the compressed air through air compressor 103 compressions that is introduced at the same time in the siphon powder blower atomizes and the acquisition zinc powder, carries the air-flow of zinc powder and collect thin zinc powder remaining in the air-flow by bagroom 105 after the 104 preliminary sedimentation separations of sedimentation storehouse.
Adopting the air atomizing legal system to be equipped with in the process of zinc powder,, be difficult to reach and produce the required suitable air pressure of particulate zinc powder, so the zinc powder of producing is thick and the granularity fluctuation range is big because the compressed air pressure of whole electrolytic zinc plant is lower and unstable.And, zinc liquid temperature after the zinc-melting furnace melting is usually at 550 ℃～600 ℃, and zinc liquid directly contacts zinc liquid and air generation oxidation reaction with the compressed air of introducing in the siphon powder blower, thereby be coated with oxide-film on the zinc particle surface, thereby zinc powder is active relatively poor.Therefore, adopt the zinc particle surface of air atomizing method preparation to have that oxide-film, particle diameter are big, poor activity, be unfavorable for carrying out smoothly of purification process in the Zinc hydrometallurgy process.In addition, when adopting air atomizing to prepare zinc powder, the zinc liquid in the zinc-melting furnace 101 enters siphon powder blower 102 by quartz ampoule, and zinc liquid solidifies easily therein, and quartz ampoule is fragile, is difficult to realize the serialization production of zinc powder.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of preparation and pulping apparatus and method of zinc powder, but utilize device serialization steady production provided by the invention, zinc powder No oxided film, the particle diameter of preparation provided by the invention and pulp making method preparation are less.
The invention provides a kind of preparation facilities of zinc powder, comprising:
The zinc smelting electrical furnace;
Flow the holding furnace that pipe links to each other with described zinc smelting electrical furnace by electric heating thermal insulation;
The atomizer and the atomisation tower that link to each other with described holding furnace outlet;
The high pressure water system that links to each other with described atomizer;
The wet vibration sieve that links to each other with described atomisation tower outlet;
The fractional sedimentation groove that is connected with described wet vibration sieve.
Preferably, described electric heating thermal insulation stream pipe comprises:
Graphite-pipe;
Be coiled in the insulated electro hot body on the described graphite-pipe;
Be coated on the outer field flame-proof thermal insulation material of described graphite-pipe;
Be coated on the outer field steel sheel of described flame-proof thermal insulation material.
Preferably, described holding furnace comprises:
Be provided with the sealing bell of nitrogen input hole;
On the described bell temperature measuring set is housed;
Be provided with zinc liquid ostium and zinc liquid body of heater from discharge orifice;
On the described body of heater level instrument is housed;
Zinc liquid flow modulation device is housed on the described body of heater, and described zinc liquid flow modulation device is controlled described zinc liquid discharge by the stroke of regulating extension bar.
Preferably, described high pressure water system comprises high-pressure hydraulic pump and pressure duct,
Described high-pressure hydraulic pump adopts variable-frequency governor control;
Device for pressure measurement, flow measurement device, transmission device table and electric control valve are housed on the described pressure duct.
Preferably, described fractional sedimentation groove has different actual internal areas.
The present invention also provides a kind of preparation and pulping device of zinc powder, comprising:
Automatic charging equipment;
The zinc smelting electrical furnace;
Flow the holding furnace that pipe links to each other with described zinc smelting electrical furnace by electric heating thermal insulation;
The atomizer and the atomisation tower that link to each other with described holding furnace outlet;
The high pressure water system that links to each other with described atomizer;
The wet vibration sieve that links to each other with described atomisation tower outlet;
The fractional sedimentation groove that is connected with described wet vibration sieve;
The pulping groove that is connected with described fractional sedimentation groove;
The abrasion-proof corrosion-proof delivery pump and the pipeline that are connected with described pulping groove.
Preferably, on the described pulping groove anticorrosive anti-wear mixer, liquid level gauge and densitometer are housed.
The present invention also provides a kind of preparation and pulp making method of zinc powder, comprising:
With the metallic zinc heat fused, obtain zinc liquid;
With described zinc liquid heating, insulation;
Zinc liquid after the described insulation is flowed into atomizing in the high-pressure atomization current, cooling, obtain water zinc mixture;
With the zinc powder vibration separation in the described water zinc mixture;
Water zinc mixture fractional sedimentation with after the described vibration separation obtains varigrained zinc powder;
Described varigrained zinc powder is added the zinc powder slurry of producing variable concentrations in the neutral leachate;
Described zinc powder slurry is transported to the storage tank of corresponding cleaning procedure.
Preferably, the temperature of described metallic zinc heat fused is 460 ℃～520 ℃.
Preferably, the temperature of described zinc liquid insulation is 550 ℃～600 ℃.
Preferably, described zinc liquid heating, insulation are carried out under nitrogen protection.
Preferably, the pressure of described high-pressure atomization current is 12～25MPa; Described water under high pressure temperature is less than 40 ℃.
Preferably, the weight ratio of water and zinc is 4～10: 1 in the described water zinc mixture.
Preferably, described neutral leachate is that pH value is 5.2～6 the neutral supernatant that leaches of electrolytic zinc.
Preferably, described zinc powder slurry is the mixed serum of neutral leachate and zinc powder, and the weight ratio of described neutral leachate and zinc powder is 7～10: 1.
From above-mentioned technical scheme as can be seen, the invention provides a kind of preparation and pulping device of zinc powder, the preparation facilities of described zinc powder comprises zinc smelting electrical furnace, electric heating thermal insulation stream pipe, holding furnace, atomizer, high pressure water system, wet vibration sieve and fractional sedimentation groove.Holding furnace forms with the zinc smelting electrical furnace by electric heating thermal insulation stream pipe " U " linker, zinc smelting electrical furnace, electric heating thermal insulation stream pipe and warm stove constitute a zinc liquid flow channel level, stable, thereby guarantee even, stable flow into holding furnace and cadmia is not brought into holding furnace of zinc liquid from the zinc smelting electrical furnace, guaranteed the cleaning of the constant and zinc liquid of zinc liquid level in the holding furnace, zinc liquid has been realized continuous stabilization production from flow velocity, flow and temperature stabilization that holding furnace flows out.
In addition, the preparation of zinc powder provided by the invention and pulp making method adopt the high-pressure atomization current with the atomizing of zinc liquid, compare with air atomizing method of the prior art, need not to adopt air atomizing, have avoided contacting of zinc powder and air; Adopt neutral leachate pulping, preparation is used for the zinc powder slurry of process for purifying.Therefore, the zinc powder for preparing surface No oxided film, particle diameter is less and even, specific area big, active good, realized automatic continuous and stable production, help carrying out smoothly of Zinc hydrometallurgy process.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is equipped with the preparation facilities schematic diagram of zinc powder for air atomizing legal system in the prior art;
Fig. 2 is the preparation facilities schematic diagram of the zinc powder in the embodiment of the invention;
Fig. 3 is the electric heating thermal insulation stream pipe schematic diagram in the embodiment of the invention;
Fig. 4 is a line frequency coreless induction electric mantle heater schematic diagram in the embodiment of the invention;
Fig. 5 is the atomizer schematic diagram in the embodiment of the invention.
The specific embodiment
Below the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The invention discloses a kind of preparation facilities of zinc powder, as shown in Figure 2, comprising:
Frequency cored induction furnace 202;
The electric heating thermal insulation stream pipe 203 that links to each other with frequency cored induction furnace 202 outlets;
Respond to electric mantle heater 204 by the line frequency coreless that electric heating thermal insulation stream pipe 203 links to each other with frequency cored induction furnace 202 siphon zinc outlets;
The atomizer 206 that links to each other with 204 outlets of line frequency coreless induction electric mantle heater;
The high pressure water system 205 that links to each other with atomizer 206 high-pressure water inlets;
The wet vibration sieve 207 that is connected with atomizer 206 outlets;
With the wet vibration sieve 207 fractional sedimentation grooves 208 that are connected.
The invention also discloses a kind of preparation and pulping device of zinc powder, as shown in Figure 2, comprising:
The frequency cored induction furnace 202 that is connected with automatic charging equipment 201;
The electric heating thermal insulation stream pipe 203 that links to each other with frequency cored induction furnace 202 outlets;
Respond to electric mantle heater 204 by the line frequency coreless that electric heating thermal insulation stream pipe 203 links to each other with frequency cored induction furnace 202 siphon zinc outlets;
The atomizer 206 that is connected with 204 outlets of line frequency coreless induction electric mantle heater;
The high pressure water system 205 that links to each other with atomizer 206 high-pressure water inlets;
The wet vibration sieve 207 that is connected with atomizer 206 outlets;
With the wet vibration sieve 207 fractional sedimentation grooves 208 that are connected.
The pulping groove 209 that is connected with fractional sedimentation groove 208;
The abrasion-proof corrosion-proof delivery pump 210 that links to each other with pulping groove 209;
The present invention adopts frequency cored induction furnace 202 as the female stove of the fusing of metallic zinc, is used for the fusing of metallic zinc, for zinc powder production provides qualified zinc liquid.Described metallic zinc is preferably negative electrode zinc metal sheet or zinc ingot metal.Frequency cored induction furnace 202 is preferably formed (not shown) by electric furnace body, siphon zinc outlet, inductor and electric-control system.Inductor is the heating element heater of frequency cored induction furnace, is preferably high-power spray pattern inductor, thereby possesses that power is big, characteristics such as long service life, iron loss are little.
Electric heating thermal insulation stream pipe 203 structures comprise as shown in Figure 3:
Graphite-pipe 303, be coated on graphite-pipe 303 outer field flame-proof thermal insulation materials 304, be coated on flame-proof thermal insulation material 304 outer field steel pipe housings 302, be coiled in insulated electro hot body 305 on the graphite-pipe 303, lay respectively at the eduction rod device 301 in the flame-proof thermal insulation material 304.Eduction rod device 301 links to each other with insulated electro hot body 305, is used to 305 power supplies of insulated electro hot body, thereby is reached for the purpose of electric heat flow tube heating.Graphite-pipe 303 is a zinc liquid mozzle, and zinc liquid circulates in graphite-pipe 303.Owing to insulated electro hot body 305 is arranged in the coiling of the outer ring of graphite-pipe 303, and by insulated electro hot body 305 is switched on, can realize the purpose to the zinc liquid heating in graphite-pipe 303 and the graphite-pipe 303, electric heating thermal insulation stream pipe 203 therefore provided by the invention can guarantee that zinc liquid does not solidify, and it is unimpeded to flow.
Line frequency coreless induction electric mantle heater 204 comprises as shown in Figure 4:
Iron yoke 403, furnace shell 405, induction coil 406, be provided with zinc liquid ostium 402 and zinc liquid from the body of heater 407 of discharge orifice 404, be provided with nitrogen input hole 408 and temperature measuring equipment 410 bell 401, be arranged on the zinc flow quantity governor motion 409 on the bell.Described zinc flow quantity governor motion 409 passes through the inlet flow area of the extension and contraction control zinc liquid of its extension bar from discharge orifice 404, thereby regulates zinc liquid discharge.Specifically can realize by screw mechanism, by moving axially and the rotation of leading screw (being extension bar) of restriction screw, thereby can make that leading screw can move along its axis when rotating screw, by moving axially of leading screw, control zinc liquid is from the zinc liquid inlet flow area of discharge orifice 404.Zinc liquid is bellmouth from the top of discharge orifice 404, by the cooperate slit that change the two between of extension bar with this bellmouth diverse location place, thereby can regulate the flow area of zinc liquid from discharge orifice 404.Zinc flow quantity governor motion 409 on the line frequency coreless induction holding furnace 204 can be regulated the flow velocity and the flow of zinc liquid, thereby can reach the purpose of regulating zinc powder particle size, therefore, can satisfy different process to zinc powder particle size and active requirement.The diameter of zinc liquid ostium 402 increases inwards gradually from furnace shell, is used to prevent solidifying in line frequency coreless induction holding furnace 204 porch of zinc liquid, thereby guarantees even, the stable inflow line frequency coreless induction holding furnace 204 of zinc liquid.Temperature measuring set, level instrument (not shown) also are housed on the body of heater 407, are used for measuring and control zinc liquid temperature and liquid level.Import nitrogen by the nitrogen input hole on the bell 401 408, thereby reduce the oxidation of zinc liquid in the stove, and prevent the oxidation damage of the graphite screw mandrel on the zinc flow quantity governor motion 409.
In frequency cored induction furnace 202 and the line frequency coreless induction electric mantle heater 204 sensor for measuring temperature is housed all; cooperate with special-purpose variable-frequency power sources power regulation device; guaranteed the stable of the interior zinc liquid temperature of stove; thereby guarantee to obtain to stablize the realization of granularity zinc powder function, overcome to adopt and be interrupted operation technique and prepare the problems such as product that the temperature that metal dust causes can't be stablized control, can not obtain the granularity unanimity.
Line frequency coreless induction electric mantle heater 204 forms by electric heating thermal insulation stream pipe 203 and frequency cored induction furnace 202 " U " the type linker.Line frequency coreless induction electric mantle heater 204, electric heating thermal insulation stream pipe 203 and frequency cored induction furnace 202 constitute a zinc liquid flow channel level, stable, thereby guarantee the inflow line frequency coreless induction electric mantle heater 204 that zinc liquid is even, stable, cooperate automatic charging equipment 201 auto feeds simultaneously, guaranteed that the zinc liquid level is constant in the line frequency coreless induction electric mantle heater 204, thereby zinc liquid has been realized serialization production from flow velocity, flow and temperature stabilization that line frequency coreless induction electric mantle heater 204 flows out.In addition, on the line frequency coreless induction electric mantle heater 204 zinc flow quantity adjusting device is housed, can obtain the granularity adjusting zinc flow quantity of zinc powder according to need, so the present invention has realized stablizing adjustable serialization production operation.
High pressure water system 205 comprises:
Two high-pressure hydraulic pumps (the using and the reserved), safety valve, overflow valve, electric control valve, hand-operated valve and electric check valve, head-tank.Wherein water pump is as the work water pump, and an other water pump is a reserve pump, when the working water pump fault occurs when out of service, automatically switches to the reserve pump operation by electric check valve.Described high-pressure hydraulic pump preferably adopts the plunger type high-pressure water pump; On high pressure water system 205 pipelines flowmeter and pressure gauge are housed preferably, have real-time measurement and transmit hydraulic pressure, water yield data function; The effect of described safety valve and overflow valve is that high pressure water system is carried out overload protection.High pressure water system 205 links to each other by the inlet of pipeline with atomizer 206, and water under high pressure directly enters in the atomizer 501 of atomizer 206, and the atomizing of zinc liquid stream, cooling are prepared zinc powder.The present invention utilizes high pressure water system, adopts the waterpower atomization method to prepare zinc powder, replaces air-atomized method of the prior art, need not zinc powder is directly contacted with air, thereby makes the surperficial No oxided film of zinc powder of preparation, and particle diameter is less, specific area is big.
The atomizer 501 and the atomisation tower 502 that link to each other with the outlet of line frequency coreless induction electric mantle heater 204.High pressure water system 205 links to each other with atomizer 501, and wet vibration sieve 207 links to each other with atomisation tower 502 outlets.The atomizer 501 preferred multiply circulation nozzles that adopt abrasion-proof stainless steel to make; Atomisation tower 502 is preferably the last inferior pyramidal that adopts stainless steel to make, the tower body of intermediate cylindrical, and atomizer 501 is mounted on the atomisation tower top.Atomizer 501 center lines and line frequency coreless induction holding furnace 203 central lines and be installed under it.The zinc liquid stream thigh that goes out from line frequency coreless induction electric mantle heater 204 underflow orifice flows passes the atomizer center, and be zinc liquid particle by the fragmentation of multiply high-velocity flow, atomizing from atomizer 501 bottoms ejections, simultaneously further be cooled to zinc powder, obtain water zinc mixture by water under high pressure.
The wet vibration sieve 207 preferred wet type linear vibrating screens that adopt stainless steel to make can be the single or multiple lift mesh structure, according to design output and granularity requirements selection standard product.The wet vibration sieve 207 zinc powder vibration separations that are used for described water zinc mixture will be separated with fine grained from the coarse granule the water zinc mixture that atomizer flows into.Wherein, vibratory sieve is positioned at the atomizer below, after water zinc mixture flows out from atomizer, directly enters in the vibratory sieve, realizes that coarse granule separates with fine grain in the water zinc mixture.Wet vibration sieves water zinc mixture is sieved, and returns the refuse of power frequency channel type induction furnace after oversize reclaims, dries or directly be used qualified water zinc mixture slurry inflow fractional sedimentation groove under the sieve in other technology.
Anticorrosive anti-wear circular cylinder body that pulping groove 209 is made by stainless steel, fiberglass or engineering plastics and the anticorrosive anti-wear mixer that is mounted thereon are formed, and its side is equipped with the liquid level gauge and the densitometer of band teletransmission and demonstration on the spot.Water zinc mixture after the vibration separation passes through fractional sedimentation from the fractional sedimentation groove after, by motor grab the zinc powder of the desired different-grain diameter of fractional sedimentation after-purification technology is delivered in the pulping groove, mix with neutral leachate, by the stirring action pulping of electric blender.By the solid-to-liquid ratio of the zinc powder slurry in the adjusting pulping groove 209, thereby make the zinc powder of preparation starch the requirement that meets hydrometallurgical processes.During pulping, the neutral leachate that the requirement of concentration is added respective volume in the pulping groove according to different process for purifying, the zinc powder that according to different process for purifying the requirement of zinc powder particle size is added corresponding granularity, corresponding weight again with electronic metering crab bucket, opening mixer simultaneously stirs the solid-liquid in the pulping groove, determine according to the data of densimeter measurement whether the density of zinc powder slurry is qualified then, with abrasion-proof corrosion-proof delivery pump 210 qualified zinc powder slurry is delivered in the zinc powder slurry storage tank 211 of corresponding cleaning procedure point by corresponding abrasion-proof corrosion-proof pipeline again.
Abrasion-proof corrosion-proof delivery pump 210 can be starched flow and pipe-line system resistance selection standard product according to zinc powder, can reach the purpose that the zinc powder slurry is carried and get final product.Can be equipped with two or many abrasion-proof corrosion-proof delivery pumps 210 in actual production, wherein one as stand-by pump, and all the other are as working barrel.Transfer pipeline and valve need be selected antiwear and anticorrosive material for use, guarantee that the course of conveying of zinc powder slurry is continuous, stablize.
In addition, included measurement and the electrical apparatus control system of preparation facilities provided by the invention can be realized following control: zinc liquid level gauging and control automatically; Temperature survey and automatic power regulation, temperature automatically controlled; Water under high pressure pressure, flow automatic measuring and control; The neutral leachate addition of pulping groove controls automatically and the zinc powder pulp density is measured automatically; Qualified zinc liquid slurry automatic transport.Be specially:
The present invention preferably adopts automatic charging equipment to feed in raw material, and more preferably adopts negative electrode zinc metal sheet charger 201, and described negative electrode zinc metal sheet charger 201 is all-hydraulic structure, PLC programme-control.Can be reinforced in trend frequency cored induction furnace 202 according to the temperature and the clear condition of line frequency coreless induction furnace 204 liquid levels of frequency cored induction furnace 202, the furnace temperature fluctuation of frequency cored induction furnace 202 is less in the feasible reinforced process, helps the constant of zinc liquid temperature; 201 reinforced actions of negative electrode zinc metal sheet charger and line frequency coreless induction furnace 204 liquid levels interlocking in addition, has only the action of when liquid level is in a certain scope, just feeding in raw material, when liquid level is higher than setting value, stop to feed in raw material, to guarantee that liquid level is constant in the line frequency coreless induction electric mantle heater 204.Therefore, the present invention is by automatic feeding device, and with metallic zinc, for example negative electrode zinc metal sheet or zinc ingot metal etc. are added in the frequency cored induction furnace 202 automatically, and can guarantee the stable of zinc liquid temperature, liquid level.
Sensor for measuring temperature, its power supply all are housed in frequency cored induction furnace 202 of the present invention and the line frequency coreless induction holding furnace 204 preferably all adopt the inverter Power Regulation, temperature automatically controlled by the thermometer that PLC program and band PID regulate.
High-pressure pump in the high pressure water system 205 of the present invention preferably adopts variable-frequency governor control, on the pipeline flowmeter, pressure gauge and electric control valve is housed preferably simultaneously, is used for real-time measurement, transmission and control hydraulic pressure, water yield data; Frequency converter, measure and control instrument, electric control valve cooperatively interact, and by the control of PLC program control system realization to the hydraulic pressure and the water yield.Regulate pump rotary speed and motor-driven valve open degree according to pressure of setting and flow automatic frequency-conversion, thereby control hydraulic pressure and flow are realized the control to the zinc powder particle diameter.
Liquid level gauge and densitometer that pulping groove of the present invention 209 sides are equipped with the band teletransmission and are shown on the spot, be used to measure the volume capacity of neutral leachate and the concentration that zinc powder is starched, link to each other with the PLC program control system, during the pulping operation, after purifying the zinc powder slurry concentration data input control system that needs, neutral leachate pipeline control valve door is opened automatically and inject required neutral leachate in pulping groove 209; When zinc powder slurry concentration reached requirement, control system was sent instruction automatically, and the abrasion-proof corrosion-proof pump is opened, and qualified zinc powder slurry is transported to corresponding cleaning procedure storage tank.
From the foregoing description as can be seen, the invention provides a kind of preparation facilities of zinc powder, comprise frequency cored induction furnace 202, electric heating thermal insulation stream pipe 203, line frequency coreless induction electric mantle heater 204, atomizer 206, high pressure water system 205, wet vibration sieve 207 and fractional sedimentation groove 208.Line frequency coreless induction electric mantle heater 204 forms by electric heating thermal insulation stream pipe 203 and frequency cored induction furnace 202 " U " the type linker, frequency cored induction furnace 202, electric heating thermal insulation stream pipe 203 and line frequency coreless induction electric mantle heater 204 constitute a zinc liquid flow channel level, stable, thereby guarantee the inflow line frequency coreless induction electric mantle heater 204 that zinc liquid is even, stable; TT﹠C system has guaranteed that line frequency coreless is responded to electric mantle heater 203 interior zinc liquid levels and zinc liquid temperature is constant; Therefore, zinc liquid is from flow velocity, flow and temperature stabilization that line frequency coreless induction electric mantle heater 204 flows out, realized that serialization steady production, zinc powder particle size are controlled.
The present invention also provides a kind of preparation and pulp making method of zinc powder, comprising:
With the metallic zinc heat fused, obtain zinc liquid;
With described zinc liquid heating, insulation, obtain qualified zinc liquid;
Qualified zinc liquid after the described insulation is flowed into atomizing in the high-pressure atomization current, cooling, obtain water zinc mixture;
With the zinc powder vibration separation in the described water zinc mixture;
Qualified water zinc mixture fractional sedimentation with after the described vibration separation obtains varigrained zinc powder;
Described varigrained zinc powder is added the qualified zinc powder slurry of producing variable concentrations in the neutral leachate;
Described qualified zinc powder slurry is transported to the storage tank of corresponding cleaning procedure.
Described the metallic zinc heat fused is preferably carried out in frequency cored induction furnace, the temperature of described metallic zinc heat fused is preferably 460 ℃～520 ℃; Described zinc liquid insulation is preferably carried out in line frequency coreless induction electric mantle heater, and the temperature of described zinc liquid insulation is 550 ℃～600 ℃, more preferably 570 ℃～590 ℃; Described zinc liquid is heated up, is incubated and preferably carries out under nitrogen protection, prevent the generation of zinc liquid oxidation phenomenon and zinc flow quantity adjusting graphite screw mandrel oxidative phenomena, thereby prevented to carry secretly in the zinc zinc liquid generation that Zinc oxide particles causes the effective zinc content of zinc powder to reduce and cause the production process disruption because of graphite screw mandrel oxidation damage; The water under high pressure pressure of described high-pressure atomization current is preferably 12～25MPa, more preferably 15～20MPa; The flow of described high-pressure atomization current is preferably according to being that high-pressure atomization discharge and zinc flow quantity weight ratio are 4～10: 1, more preferably 6～7: 1; The temperature of described high-pressure atomization current is less than 40 ℃, more preferably 20～30 ℃; The weight ratio of described neutral leachate and zinc powder is preferably 7～10: 1, more preferably 8～9: 1.
The preparation of zinc powder provided by the invention and pulp making method adopt the high-pressure atomization current with the atomizing of zinc liquid, compare with air atomizing in the prior art, and the zinc powder surface No oxided film for preparing, particle diameter is little, specific area is big, activity is good.Detect by analysis and test, the result shows: the first, and zinc particle surface No oxided film, its metallic zinc content that the present invention produces reach more than 99%, exceed 1% than the air atomizing zinc powder; The second, because the quenching in water of zinc liquid particulate, the water atomization zinc particle is the spheroid or the spheroid of surperficial barbed shape, and under the identical situation of average grain diameter, its surface area is more than the twice of air atomizing zinc particle surface area, reaches 1.1m
2/ g; The 3rd, because the zinc powder of the present invention's preparation does not have oxide-film, specific area is big, active good, thereby the zinc powder consumption in the purification process of Zinc hydrometallurgy process is few, show through experiment test, water atomization zinc powder consumption in the purification process of zinc hydrometallurgy reduces 30% than the air atomizing zinc powder, and electrolytic cleaning operation expense is reduced greatly.
From the foregoing description as can be seen: first, the preparation of zinc powder provided by the invention and pulp making method adopt the high-pressure atomization current that zinc liquid is atomized, compare with air atomizing in the prior art, need not to adopt air atomizing, avoided contacting of zinc powder and air, therefore, the zinc powder for preparing surface No oxided film, particle diameter is little, specific area is big, activity is good, consumption is few; The second, by regulating zinc liquid temperature, flow, water under high pressure pressure and flow, can realize effective control to zinc powder particle size; The 3rd, adopt neutral leachate pulping, abrasion-proof corrosion-proof pump and pipe-line system, can produce the zinc powder that satisfies different process for purifying requirements and starch, realize far distance automatic conveying; The 4th, whole process of production safety, environmental protection.Based on above some, the present invention can better satisfy in the Zinc hydrometallurgy process purification process to the requirement of zinc powder.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (15)
1. the preparation facilities of a zinc powder is characterized in that, comprising:
The zinc smelting electrical furnace;
Flow the holding furnace that pipe links to each other with described zinc smelting electrical furnace by electric heating thermal insulation;
The atomizer and the atomisation tower that link to each other with described holding furnace outlet;
The high pressure water system that links to each other with described atomizer;
The wet vibration sieve that links to each other with described atomisation tower outlet;
The fractional sedimentation groove that is connected with described wet vibration sieve.
2. preparation facilities according to claim 1 is characterized in that, described electric heating thermal insulation stream pipe comprises:
Graphite-pipe;
Be coiled in the insulated electro hot body on the described graphite-pipe;
Be coated on the outer field flame-proof thermal insulation material of described graphite-pipe;
Be coated on the outer field steel sheel of described flame-proof thermal insulation material.
3. preparation facilities according to claim 1 is characterized in that, described holding furnace comprises:
Be provided with the sealing bell of nitrogen input hole;
On the described bell temperature measuring set is housed;
Be provided with zinc liquid ostium and zinc liquid body of heater from discharge orifice;
On the described body of heater level instrument is housed;
Zinc liquid flow modulation device is housed on the described body of heater, and described zinc liquid flow modulation device is controlled described zinc liquid discharge by the stroke of regulating extension bar.
4. preparation facilities according to claim 1 is characterized in that described high pressure water system comprises high-pressure hydraulic pump and pressure duct,
Described high-pressure hydraulic pump adopts variable-frequency governor control;
Device for pressure measurement, flow measurement device, transmission device table and electric control valve are housed on the described pressure duct.
5. preparation facilities according to claim 1 is characterized in that, described fractional sedimentation groove has different actual internal areas.
6. the preparation of a zinc powder and pulping device is characterized in that, comprising:
Automatic charging equipment;
The zinc smelting electrical furnace;
Flow the holding furnace that pipe links to each other with described zinc smelting electrical furnace by electric heating thermal insulation;
The atomizer and the atomisation tower that link to each other with described holding furnace outlet;
The high pressure water system that links to each other with described atomizer;
The wet vibration sieve that links to each other with described atomisation tower outlet;
The fractional sedimentation groove that is connected with described wet vibration sieve;
The pulping groove that is connected with described fractional sedimentation groove;
The abrasion-proof corrosion-proof delivery pump and the pipeline that are connected with described pulping groove.
7. preparation according to claim 6 and pulping device is characterized in that, on the described pulping groove anticorrosive anti-wear mixer, liquid level gauge and densitometer are housed.
8. the preparation of a zinc powder and pulp making method is characterized in that, comprising:
With the metallic zinc heat fused, obtain zinc liquid;
With described zinc liquid heating, insulation;
Zinc liquid after the described insulation is flowed into atomizing in the high-pressure atomization current, cooling, obtain water zinc mixture;
With the zinc powder vibration separation in the described water zinc mixture;
Water zinc mixture fractional sedimentation with after the described vibration separation obtains varigrained zinc powder;
Described varigrained zinc powder is added the zinc powder slurry of producing variable concentrations in the neutral leachate;
Described zinc powder slurry is transported to the storage tank of corresponding cleaning procedure.
9. preparation according to claim 8 and pulp making method is characterized in that, the temperature of described metallic zinc heat fused is 460 ℃～520 ℃.
10. preparation according to claim 8 and pulp making method is characterized in that, the temperature of described zinc liquid insulation is 550 ℃～600 ℃.
11. preparation according to claim 8 and pulp making method is characterized in that, described zinc liquid heating, insulation are carried out under nitrogen protection.
12. preparation according to claim 8 and pulp making method is characterized in that, the pressure of described high-pressure atomization current is 12～25MPa; Described water under high pressure temperature is less than 40 ℃.
13. preparation according to claim 8 and pulp making method is characterized in that, the weight ratio of water and zinc is 4～10: 1 in the described water zinc mixture.
14. preparation according to claim 8 and pulp making method is characterized in that, described neutral leachate is that pH value is 5.2～6 the neutral supernatant that leaches of electrolytic zinc.
15. preparation according to claim 8 and pulp making method is characterized in that, described zinc powder slurry is the mixed serum of neutral leachate and zinc powder, and the weight ratio of described neutral leachate and zinc powder is 7～10: 1.
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| CN101947653B CN101947653B (en) | 2013-03-20 |
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| CN102392254A (en) * | 2011-10-31 | 2012-03-28 | 西安理工大学 | Water-soluble corrosion inhibitor and method for preparing zinc slurry by using the same |
| CN102921903A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Measurement, control and storage system for molding sand curing agent |
| CN106636642A (en) * | 2016-11-16 | 2017-05-10 | 任昊琦 | Method of increasing utilization rate of zinc powder for purification in zinc hydrometallurgy |
| CN108015296A (en) * | 2018-01-12 | 2018-05-11 | 赤峰中色锌业有限公司 | Hydraulic atomization zinc powder production system |
| CN109058117A (en) * | 2018-08-22 | 2018-12-21 | 株洲冶炼集团股份有限公司 | A method of extending zinc liquid pump graphite piece service life |
| CN109550966A (en) * | 2018-12-17 | 2019-04-02 | 云南驰宏资源综合利用有限公司 | A kind of siphon is vertically atomized the method and device thereof that blowing prepares zinc powder |
| CN111804924A (en) * | 2020-07-20 | 2020-10-23 | 宁波双鹿新能源科技有限公司 | Production system for preparing zinc material by atomization |
| CN112828269A (en) * | 2019-11-22 | 2021-05-25 | 昆山市天和焊锡制造有限公司 | Molten material feeding device |
| CN113244669A (en) * | 2021-05-25 | 2021-08-13 | 中国恩菲工程技术有限公司 | Filter equipment and have its preparation zinc powder equipment |
| CN113751715A (en) * | 2020-06-01 | 2021-12-07 | 株洲优瑞科有色装备有限公司 | High-pressure water atomization metal powder slurry making process and slurry making system thereof |
| CN114260456A (en) * | 2021-12-18 | 2022-04-01 | 江苏申隆锌业有限公司 | Adopt innoxious apparatus for producing of atomizing preparation zinc powder |
| CN115642245A (en) * | 2022-12-07 | 2023-01-24 | 福建南平南孚电池有限公司 | Negative electrode material of leakage-proof alkaline zinc-manganese battery |
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| CN102392254A (en) * | 2011-10-31 | 2012-03-28 | 西安理工大学 | Water-soluble corrosion inhibitor and method for preparing zinc slurry by using the same |
| CN102921903A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Measurement, control and storage system for molding sand curing agent |
| CN106636642A (en) * | 2016-11-16 | 2017-05-10 | 任昊琦 | Method of increasing utilization rate of zinc powder for purification in zinc hydrometallurgy |
| CN106636642B (en) * | 2016-11-16 | 2018-05-25 | 任昊琦 | A kind of method of purification zinc powder utilization rate in raising zinc hydrometallurgy |
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| CN109058117A (en) * | 2018-08-22 | 2018-12-21 | 株洲冶炼集团股份有限公司 | A method of extending zinc liquid pump graphite piece service life |
| CN109550966A (en) * | 2018-12-17 | 2019-04-02 | 云南驰宏资源综合利用有限公司 | A kind of siphon is vertically atomized the method and device thereof that blowing prepares zinc powder |
| CN112828269A (en) * | 2019-11-22 | 2021-05-25 | 昆山市天和焊锡制造有限公司 | Molten material feeding device |
| CN113751715A (en) * | 2020-06-01 | 2021-12-07 | 株洲优瑞科有色装备有限公司 | High-pressure water atomization metal powder slurry making process and slurry making system thereof |
| CN113751715B (en) * | 2020-06-01 | 2023-08-29 | 株洲优瑞科有色装备有限公司 | High-pressure water atomization metal powder pulping process and pulping system thereof |
| CN111804924A (en) * | 2020-07-20 | 2020-10-23 | 宁波双鹿新能源科技有限公司 | Production system for preparing zinc material by atomization |
| CN113244669A (en) * | 2021-05-25 | 2021-08-13 | 中国恩菲工程技术有限公司 | Filter equipment and have its preparation zinc powder equipment |
| CN114260456A (en) * | 2021-12-18 | 2022-04-01 | 江苏申隆锌业有限公司 | Adopt innoxious apparatus for producing of atomizing preparation zinc powder |
| CN115642245A (en) * | 2022-12-07 | 2023-01-24 | 福建南平南孚电池有限公司 | Negative electrode material of leakage-proof alkaline zinc-manganese battery |
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