CN104928497A - Method of adopting oxygen-enriched vortex bath smelting furnace to treat zinc-leaching residue - Google Patents
Method of adopting oxygen-enriched vortex bath smelting furnace to treat zinc-leaching residue Download PDFInfo
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Abstract
The invention discloses a method of adopting an oxygen-enriched vortex bath smelting furnace to treat zinc-leaching residue. The oxygen-enriched vortex bath smelting furnace comprises a furnace body and multiple spray guns, a furnace cavity has a round cross section, multiple spray gun inserting holes are formed in the side wall of the furnace body circumferentially at intervals, and the spray guns are inserted into the spray gun inserting holes and deviate from the circle center of the round cross section of the furnace cavity along a same direction. The method includes the following steps: feeding the zinc-leaching residue and reducing coal into the furnace body; adopting the spray guns to spray fuel and oxygen-enriched air into a bath in a furnace in a manner of deviating from the circle center by a certain angle to generate vortex in the bath, wherein decomposition of the zinc-leaching residue and reduction volatilizing of zinc oxide are accelerated, and low-zinc molten slag smaller than 8% in zinc content and smoke are generated; continuing adopting the oxygen-enriched vortex bath smelting furnace to deeply deplete the low-zinc molten slag to obtain depleted furnace slag smaller than 2.5% in zinc content. By the method, the furnace body is long in service life, high in hearth efficiency, low in energy consumption and environment friendly in operation.
Description
Technical field
The present invention relates to a kind of nonferrous smelting method, relate to a kind of method adopting oxygen enrichment vortex bath smelting furnace process zinc to soak slag particularly.
Background technology
Modern zinc smelting process for production is mainly divided into pyrometallurgy of zinc and the large class of zinc hydrometallurgy two.Zinc hydrometallurgy process is the zinc abstraction technique of world today's main flow, worldwide account for more than 85% of zinc abstraction total amount, leaching process meeting output leached mud, the leached mud composition of different technical process outputs is different, but usually all can contain the valuable metals such as zinc, lead, copper, gold and silver, need to be reclaimed.In addition, non-ferrous metal hydrometallurgy waste residue is listed in wherein in China's " National Hazard refuse register ", in leached mud, zinc, lead belong to first kinds of pollution matter, it exists mainly with forms such as the vitriol of solubility in leached mud, if do not processed, very easily cause following three kinds of environmental hazards: the heavy metal 1. in leached mud enters surface water body and body of groundwater with rainwater etc., causes water environment pollution.2., after leached mud natural air drying, heavy metal wherein enters air with airborne dust, causes atmospheric pollution.3. leached mud enters soil without harmless treatment, causes soil pollution, and then pollutes farm crop and underground water.
Along with country is more and more stricter to the requirement of environmental protection, following zinc leaching residue is not process, but the problem how to handle well.The method the most frequently used both at home and abroad when pre-treatment zinc leaching slag has: rotary kiln evaporation method, Ausmelt method, blast furnace fuming method and oxygen-enriched side-blowing bath smelting process.
(1) rotary kiln evaporation method technics comparing is ripe, and the zinc hydrometallurgy factory of China mostly adopts rotary kiln evaporation method process zinc leaching residue.The coke powder of leached mud collocation ~ 50%, adds in rotary kiln, and at high temperature the metallic reducing such as lead, zinc volatilizees, and then reclaims with the form of oxide compound flue dust.But still there is obvious shortcoming in this kind of technique, be mainly reflected in: the first, operating rate is low.Because in the cycled recondition of kiln liner and production, accident stops kiln, year, efficiency was less than 80%.The second, comprehensive energy consumption is high.Rotary kiln evaporation needs to allocate ~ the coke powder of 50% into, causes production energy consumption higher.3rd, because operating rate is low, processing power is less than normal.4th, silver raising recovery rate is low.The rate of recovery of current employing rotary kiln evaporation method process leached mud silver is only about 10 ~ 20%.
(2) oxygen-enriched top blowing smelting process.Only have Wen Shan smeltery of Xin Ye company of Korea S to grasp this technology at present, its use 1 smelting furnace+1 fuming furnace totally 2 Ausmelt top blast stove process zinc leaching residues, refine plumbous QSL slag and pyrrhosiderite slag, achieve the operate continuously of factory.But top blast stove oxygen-rich concentration is less than 40%, according to the production data of Wen Shan, the coal consumption of smelting furnace is more than 38%.And be less than 3 days due to the life-span of top-blown spray gun, cause that to change rifle relatively more frequent, labour intensity is large, and operating rate is lower, and investment is large.
(3) blast furnace fuming method.Adopt fuming furnace collocation process zinc leaching residue (cold burden amount) and reduced blast furnace or blast furnace warm sludge.This technology utilization blast furnace warm sludge, as thermal barrier, accelerates the fusing of cold burden, is conducive to the administration measure of fuming furnace and extends the water jacket life-span, improve the operating rate of fuming furnace.But this technique all processes zinc leaching residue cold burden for fuming furnace, there is the problem that specific capacity is low, the lower floor tuyere zone water jacket life-span is short, and sulfur dioxide concentration in flue gas is low cannot effective recycling.
(4) side-blown converter fusing+blast furnace fuming method.Adopt reduction volatilization melting to process zinc leaching residue technique, most critical is in the fusing of zinc leaching residue.Because in the process of reduction volatilization melting, the fusing slag making of the decomposition of vitriol in leached mud, the evaporation of moisture and each material needs to absorb a large amount of heat.And after in leached mud fusing, slag making completes, be then need stronger reducing atmosphere make zinc, lead as much as possible reduction volatilization enter in flue gas, the heat now consumed only needs the thermal equilibrium maintaining reduction volatilization process.
Based on this, spray gun of side-blown converter sprays into oxygen-rich air and coal dust to provide a large amount of heat melts zinc leaching residues, and fuming furnace then only sprays into normal air and coal dust to ensure strong reducing property atmosphere in stove and thermal equilibrium.Fuming furnace process heat material is maturation process.But this technique belongs to side-blowing bath melting category.Particularly body of heater width, because distance limit is stirred in side-blown spray gun winding-up, width cannot significantly adjust, and is generally 2.2-2.8 rice, and stove maximizes difficult, can only realize the increase of smelting furnace hearth area by increasing body of heater length.So just cause furnace heat to disperse, the material strengths such as melting zinc leaching slag are difficult to maximize; Side wall refractory brick is along with the prolongation of side wall length simultaneously, expands and causes stress not concentrate the increased risk of brick.
Summary of the invention
For solving the shortcoming of above-mentioned various method, of the present inventionly proposing a kind of oxygen enrichment vortex bath smelting furnace process zinc that adopts and soak the method for slag, this method has the advantage that energy consumption is low, Smelting Effect is good.
According to the embodiment of the present invention, the oxygen enrichment vortex bath smelting furnace that the present invention adopts comprises: body of heater and multiple spray gun, in described body of heater, there is furnace chamber, described body of heater has charging opening, exhanst gas outlet and slag notch, described furnace chamber has circular cross section, and the sidewall of described body of heater is provided with along the circumference of described body of heater multiple spray gun jacks spaced apart; Described spray gun is inserted in described spray gun jack and multiple described spray gun departs from the center of circle of the circular cross section of described furnace chamber in the same direction; Described method comprises the steps: zinc to soak slag and reduction coal after automatic blending, drops in body of heater by described charging opening; Described spray gun is adopted fuel and oxygen-rich air to be injected in stove in molten bath, because spray gun sprays into described fuel and oxygen-rich air to depart from center of circle certain angle, cause in molten bath and produce vortex, accelerate decomposition and the zinc oxide reduction volatilization of zinc leaching slag, generate low zinc slag and flue gas that zinc content is less than 8%; Continue to adopt described oxygen enrichment vortex bath smelting furnace to carry out degree of depth dilution operation to described low zinc slag, obtain the dilution slag that zinc content is less than 2.5%.
After above-mentioned process, zinc content be less than 2.5% dilution slag can directly water broken as building-assisted material take out, flue gas during smelting send after waste heat boiler recovery waste heat sulfuric acid prepare and desulphurization system.
The method of the oxygen enrichment vortex bath smelting furnace process zinc leaching slag that the present invention proposes, be different from traditional top blast, bottom blowing or side-blown melting smelting process, this melting method, by spray gun spaced apart on circular furnace wall, is suitably deflected by angle of gun, the basis of traditional smelting bath smelting process bubbling melting is strengthened smelting process further, molten bath is rotated, produce vortex, this method is particularly suitable for processing the material that can not generate heat, particularly zinc leaching slag.
According to the method for the employing oxygen enrichment vortex bath smelting furnace process zinc of embodiment of the present invention leaching slag, energy consumption is low, and Smelting Effect is good, and specific capacity is high, body of heater operating rate and the furnace shaft repair life-span long, be conducive to construction and running cost.
In some embodiments of the invention, to depart from the angle in the center of circle of the circular cross section of described furnace chamber identical for the blowing direction of multiple described spray gun.
In a particular embodiment of the present invention, the angle between the center of circle of the winding-up end of described spray gun and the circular cross section of described furnace chamber between line and the blowing direction of this spray gun is in the scope of 5-60 degree.
Preferably, described multiple spray gun is evenly arranged along the circumference of described furnace chamber.
In some embodiments of the invention, described body of heater is provided with overfiren air port, and the air outside described body of heater enters in described furnace chamber from described overfiren air port.
Preferably, the winding-up end of described spray gun is positioned at bottom, molten bath.
According to some embodiments of the present invention, described spray gun dips down relative to horizontal direction and tiltedly arranges.
In a preferred embodiment of the invention, the bottom surface of described furnace chamber is segment-shaped.
Further, described furnace bottom has the wide straight joint of 2-5mm, and the steel plate of described furnace bottom is provided with the lead discharging mouth of diameter about 2cm, for when leaded in described zinc leaching slag, is discharged by the metallic lead depositing to furnace bottom by described straight joint from described lead discharging mouth.
In some embodiments of the invention, described body of heater comprises roof, sidewall and is positioned at the cupola well of bottom, and the flame retardant coating of described sidewall and described cupola well is magnesia chrome brick layer, and the flame retardant coating of described roof is the refractory steel fiber ramming bed of material or described roof is membrane wall.
Further, the outside of the flame retardant coating of described sidewall is provided with copper water jacket cooling device.
In some embodiments of the invention, described spray gun is arranged on muzzle brick, and described muzzle brick is provided with described spray gun jack, and described muzzle brick and muzzle brick to cool copper water jacket combination-inlaying shape in aggregates.
In some embodiments of the invention, the gun slot height of described oxygen enrichment vortex bath smelting furnace is 400-1500mm from furnace bottom distance, and described slag notch is positioned at gun slot top 400-800mm; Described oxygen enrichment vortex bath smelting furnace also comprises drain and lower cinder notch, and described drain is positioned at furnace bottom, and described lower cinder notch is positioned at gun slot bottom 200-400mm, for hot lower replacing spray gun and muzzle brick.
Accompanying drawing explanation
Fig. 1 is the axial cross-sectional schematic of the oxygen enrichment vortex bath smelting furnace according to the embodiment of the present invention.
Fig. 2 is the cross sectional representation of the oxygen enrichment vortex bath smelting furnace according to the embodiment of the present invention.
Fig. 3 is the process flow sheet according to the embodiment of the present invention.
Reference numeral:
Oxygen enrichment vortex bath smelting furnace 100, body of heater 1, furnace chamber 10, roof 11, sidewall 12, cupola well 13, slag notch 15, charging opening 16, exhanst gas outlet 17, insulation burner mouth 18, visit cinder notch 19,
Spray gun 2, copper water jacket 3, skirt 4, body of heater basis 5, pre-embedded bolt 6.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection or each other can communication; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
The method processing zinc leaching slag according to the employing oxygen enrichment vortex bath smelting furnace 100 of the embodiment of the present invention is described in detail below with reference to Fig. 1 and Fig. 2.
According to the oxygen enrichment vortex bath smelting furnace 100 of the embodiment of the present invention, comprising: body of heater 1 and multiple spray gun 2, wherein have furnace chamber 10 in body of heater 1, furnace chamber 10 has circular cross section, when bath smelting furnace 100 works, is contained with melt to form molten bath in furnace chamber 10.
The sidewall 12 of body of heater 1 is provided with along the circumference of body of heater 1 multiple spray gun jacks spaced apart.Particularly, body of heater 1 comprises roof 11, sidewall 12 and is positioned at the cupola well 13 of diapire, and cupola well 13 and the sidewall 12 of body of heater 1 have flame retardant coating respectively, and flame retardant coating can be piled up by refractory brick and form.Thus being formed as circular due to the cross section of furnace chamber 10, body of heater 1 expands when being heated evenly, does not have area of stress concentration, can avoid occurring falling brick phenomenon, the stability of raising body of heater 1, the normal use of guarantee bath smelting furnace 100.
In concrete example of the present invention, the sidewall 12 of body of heater 1 and the flame retardant coating of cupola well 13 are magnesia chrome brick layer, and the flame retardant coating of the roof 11 of body of heater 1 is the refractory steel fiber ramming bed of material or roof 11 is membrane wall.
Spray gun 2 is inserted in spray gun jack and multiple spray gun 2 departs from the center of circle of the circular cross section of furnace chamber 10 in the same direction.Preferably, multiple spray gun 2 is evenly arranged along the circumference of furnace chamber 10.The center of circle that wherein each spray gun 2 departs from the circular cross section of furnace chamber 10 refers between line L1 between the center of circle of the winding-up end of spray gun 2 and the circular cross section of the furnace chamber 10 and emission direction A of spray gun 2 has angle theta, in other words, the emission direction of each spray gun 2 departs from the center of circle of the circular cross section of furnace chamber 10, and each spray gun 2 sprays medium with the direction that the center of circle of the circular cross section with furnace chamber 10 is angled.The center of circle that the multiple spray guns 2 simultaneously described in the present invention depart from the circular cross section of furnace chamber 10 in the same direction refers to multiple spray gun 2 and to depart from along clockwise direction or multiple spray gun 2 departs from the counterclockwise direction.
Body of heater 1 is also provided with charging opening 16, slag notch 15 and exhanst gas outlet 17, charging opening 16 and exhanst gas outlet 17 can be located on the roof 11 of body of heater 1, and slag notch 15 can be located on the sidewall 12 of body of heater 1.Wherein in the illustrated example shown in fig. 2, in order to improve the speed of slagging tap, the sidewall 12 of body of heater 1 can be provided with two spaced slag notches 15 in the vertical direction.
Need to be described, because zinc has certain volatility, under the temperature of reaction in molten bath, zinc is converted primarily into zinc oxide fumes and discharges from exhanst gas outlet.
In concrete example of the present invention, the height of body of heater 1 is about 4 ~ 15m, and the internal diameter of furnace chamber 10 is 1 ~ 8m, and each spray gun 2 is 1 ~ 2m with the distance of furnace bottom.
Process the method for zinc leaching slag according to the employing oxygen enrichment vortex bath smelting furnace 100 of the embodiment of the present invention, comprise the steps:
Zinc is soaked slag and reduction coal after automatic blending, dropped in body of heater by charging opening, wherein reduction coal can be lump coal.
Adopt spray gun to be injected in stove in molten bath by fuel and oxygen-rich air, zinc leaching slag reacts to generate low zinc slag and the flue gas that zinc content is less than 8% in molten bath; Continue to adopt described oxygen enrichment vortex bath smelting furnace to carry out degree of depth dilution operation to described low zinc slag, obtain the dilution slag that zinc content is less than 2.5%.Dilution slag is discharged from slag notch, and flue gas is discharged from exhanst gas outlet.
Specifically, material and zinc leaching slag can pass through automatic batching system, join in furnace chamber 10 by charging opening 16, fuel and fine coal and oxygen-rich air are injected in furnace chamber and carry out combustion heat release by spray gun 2, and wherein fine coal can utilize oxygen and pressurized gas to spray from spray gun 2 as carrier.Fine coal plays melting materials capable effect in the fusion stage mainly as fuel, plays reductive action, realize the operation of above-mentioned redox atmosphere by adjustment coefficient of excess air to later stage fine coal major part.
A small amount of reduction coal can be allocated into for controlling stove internal oxidition reduction atmosphere, to reduce in slag containing zinc rate from charging opening 16 simultaneously.Bath temperature can adjust and control at 1200 ~ 1400 DEG C.
Because multiple spray gun 2 departs from the center of circle of the circular cross section of furnace chamber 10 in the same direction, therefore, it is possible to make to produce certain limit in furnace chamber 10 to horizontally rotate region, thus make the melt composition vortex motion in furnace chamber 10, that is, molten bath horizontally rotates while stirring up and down, molten bath forms whirlpool region, rapidly zinc is soaked slag and reduction coal to be rolled in molten bath fusing and reduction reaction occur, particularly all spray guns 2 spray into furnace heat and converge at central zone in stove, and the burn-off rate of zinc leaching slag is accelerated.
Continue to adopt described oxygen enrichment vortex bath smelting furnace 100 to carry out degree of depth dilution operation to the low zinc slag slag that fusing and preliminary reduction reaction generate, obtain the dilution slag that zinc content is less than 2.5%.Discharge dilution slag from slag notch 15, the flue gas that reaction generates is discharged from exhanst gas outlet 17.
Before material is put into furnace chamber 10, generally need to allocate quartzite or Wingdale adjustment slag type into according to material main component, reduce slag melting point and viscosity, reduce melt tank reaction temperature.
When in zinc leaching slag, zinc content is higher (18% ~ 22%), because oxygen enrichment vortex bath smelting furnace 100 generally plays material effect, simultaneously spray into and allocated into certain reduction coal under high temperature and due to a large amount of fuel, zinc in zinc leaching slag still has certain volatility, therefore fusing and preliminary reduction reaction after low zinc slag in contain zinc generally can be reduced to less than 8%, because also containing part valuable metal in low zinc slag, can continue to utilize the further degree of depth dilution of oxygen enrichment vortex bath smelting furnace, cause in dilution slag and be finally reduced to less than 2.5% containing zinc.
Process the method for zinc leaching slag according to the employing oxygen enrichment vortex bath smelting furnace 100 of the embodiment of the present invention, by adopting oxygen enrichment vortex bath smelting furnace 100, tool has the following advantages:
1) because multiple spray gun 2 departs from the center of circle of the circular cross section of furnace chamber 10 in the same direction, therefore, it is possible to make to produce certain limit in furnace chamber 10 to horizontally rotate region, thus make the melt composition vortex motion in furnace chamber 10, the zinc leaching slag added and reduction coal can be involved in melt rapidly, abundant participation reaction, energy consumption is low, and Smelting Effect is good, can improve the processing power of body of heater 1.
2) compared with side-blowing bath smelting furnace, multiple spray gun 2 all points to the central zone of furnace chamber 10, higher temperature can be produced at furnace chamber 10 center, be conducive to material to melt rapidly, greatly improve specific capacity, wherein specific capacity refers to every square meter hearth area and processes how many tons of materials every day, general side-blown converter 25 tons of/day square meters, and the bath smelting furnace 100 in the present invention can reach 25 ~ 80 tons of/day square meters.
3) compared with side-blowing bath smelting furnace, the cross section of furnace chamber 10 is formed as circular, the stress ratio that in furnace chamber 10, refractory brick bears can be made comparatively even, greatly avoid arch brick, fall brick phenomenon, substantially prolongs body of heater 1 operational use time and operation life.
4) compared with top-blown bath smelting furnace, multiple spray gun 2 disperses winding-up that melt in furnace chamber 10 can be avoided to produce too violent seething, and prevents splash, and is conducive to reducing body of heater 1 height, reduces body of heater 1 and builds difficulty and laid down cost.
In brief, process the method for zinc leaching slag according to the employing oxygen enrichment vortex bath smelting furnace 100 of the embodiment of the present invention, energy consumption is low, Smelting Effect is good, and specific capacity is high, and operational use time and the operation life of body of heater 1 are long, be conducive to reducing body of heater 1 height, reduce body of heater 1 and build difficulty and laid down cost.
Preferably, body of heater 1 is provided with overfiren air port (scheming not shown), and the air outside body of heater 1 enters in furnace chamber 10 from overfiren air port.Thus by being provided with overfiren air port, being conducive to burning again of inflammable gas carbon monoxide in stove or hydrogen, the abundant after-flame of inflammable gas produced in stove can being made, and then can environmental be reduced.
In concrete example of the present invention, spray gun 2 is positioned at the molten bath of furnace chamber 10 bottom.Such as the winding-up end of each spray gun 2 can be immersed in 0.5 ~ 1.5m under molten bath, thus can ensure that molten bath can be formed with vortex region further.
According to some embodiments of the present invention, the angle that the blowing direction of multiple spray gun 2 departs from the center of circle of the circular cross section of furnace chamber 10 is identical.Thus ensure that the melt in furnace chamber 10 can form vortex motion further.Particularly, the angle theta between the center of circle of the winding-up end of spray gun 2 and the circular cross section of furnace chamber 10 between line L1 and the blowing direction A of this spray gun 2 is in the scope of 5-60 degree.Preferably, angle theta is 15 degree.
In some embodiments of the invention, angle theta is adjustable.That is, the deflection angle of each spray gun 2 is adjustable.Wherein by the angle of change spray gun jack and the deflection angle of each spray gun 2 of adjustable.Particularly, each spray gun jack can be located on one block of insulating brick, and the insulating brick being provided with spray gun jack is called muzzle brick, in actual production process, if need the deflection angle adjusting spray gun 2, only needs the muzzle brick changing corresponding position.Thus due to angle adjustable, according to the change of the purposes of body of heater 1 or material change adjustment winding-up angle, body of heater 1 can be run under optimum working parameter, adds the scope of application and the production chains of body of heater 1.
In some embodiments of the invention, spray gun 2 is arranged on muzzle brick, and muzzle brick is provided with spray gun jack, and muzzle brick and muzzle brick to cool copper water jacket combination-inlaying shape in aggregates, thus optimize the cooling performance of muzzle near zone.
In some embodiments of the invention, the gun slot height of oxygen enrichment vortex bath smelting furnace 100 is 400-1500mm from furnace bottom distance, and slag notch is positioned at gun slot top 400-800mm; Oxygen enrichment vortex bath smelting furnace 100 also comprises drain and lower cinder notch, and drain is positioned at furnace bottom, and lower cinder notch is positioned at gun slot bottom 200-400mm, for hot lower replacing spray gun and muzzle brick.
As shown in Figure 2, according to a particular embodiment of the invention, each spray gun 2 dips down relative to horizontal direction and tiltedly arranges.That is, each spray gun jack downward-sloping extension on direction from outside to inside.Thus by making the downward-sloping setting of each spray gun 2, certain effect of seething up and down can also be caused, be conducive to melt in furnace chamber 10 and react more fast, fully, the processing power of body of heater 1 can be improved further.
In some embodiments of the invention, as shown in Figure 2, the bottom surface of furnace chamber 10 is segment-shaped.That is, the bottom surface of furnace chamber 10 is formed as recessed segment-shaped downwards.Thus the stress ratio that the furnace bottom of segment-shaped makes refractory brick in stove bear is comparatively even, greatly avoids arch brick, falls brick phenomenon, substantially prolongs body of heater 1 operational use time and operation life.
Further, furnace bottom has the wide straight joint of 2-5mm, and the steel plate of furnace bottom is provided with the lead discharging mouth of diameter about 2cm, for when leaded in zinc leaching slag, is discharged by the metallic lead depositing to furnace bottom by straight joint from lead discharging mouth.
As depicted in figs. 1 and 2, according to some embodiments of the present invention, the outside of the flame retardant coating of sidewall 12 is provided with copper water jacket 3.By being provided with copper water jacket 3, the temperature of the flame retardant coating of the sidewall 12 of body of heater 1 can be reduced, extending the work-ing life of the flame retardant coating of the sidewall 12 of body of heater 1, thus extend the work-ing life of body of heater 1.
In the figure 2 example, body of heater 1 also comprises skirt 4 and body of heater basis 5, and skirt 4 is connected with the pre-embedded bolt 6 on body of heater basis 5, and body of heater 1 is fixed on skirt 4, thus when effectively can prevent bath smelting body of heater 1 displacement and rock.
As shown in Figure 2, the roof 11 of body of heater 1 is also provided with and visits cinder notch 19 and insulation burner mouth 18, visiting cinder notch 19 is thief hatch, and insulation burner mouth 18 is for installing insulation burner.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (13)
1. the method adopting oxygen enrichment vortex bath smelting furnace process zinc to soak slag, it is characterized in that, described oxygen enrichment vortex bath smelting furnace comprises: body of heater and multiple spray gun, in described body of heater, there is furnace chamber, described body of heater has charging opening, exhanst gas outlet and slag notch, described furnace chamber has circular cross section, and the sidewall of described body of heater is provided with along the circumference of described body of heater multiple spray gun jacks spaced apart; Described spray gun is inserted in described spray gun jack and multiple described spray gun departs from the center of circle of the circular cross section of described furnace chamber in the same direction;
Described method comprises the steps:
Zinc is soaked slag and reduction coal after automatic blending, drop in body of heater by described charging opening; Described spray gun is adopted fuel and oxygen-rich air to be injected in stove in molten bath, because spray gun sprays into described fuel and oxygen-rich air to depart from center of circle certain angle, cause in molten bath and produce vortex, accelerate decomposition and the zinc oxide reduction volatilization of zinc leaching slag, generate low zinc slag and flue gas that zinc content is less than 8%; Continue to adopt described oxygen enrichment vortex bath smelting furnace to carry out degree of depth dilution operation to described low zinc slag, obtain the dilution slag that zinc content is less than 2.5%.
2. the method for employing oxygen enrichment vortex bath smelting furnace process zinc according to claim 1 leaching slag, is characterized in that, the angle that the blowing direction of multiple described spray gun departs from the center of circle of the circular cross section of described furnace chamber is identical.
3. the method for employing oxygen enrichment vortex bath smelting furnace process zinc leaching slag according to claim 1, it is characterized in that, the angle between the center of circle of the winding-up end of described spray gun and the circular cross section of described furnace chamber between line and the blowing direction of this spray gun is in the scope of 5-60 degree.
4. the method for employing oxygen enrichment vortex bath smelting furnace process zinc leaching slag according to claim 1, it is characterized in that, described multiple spray gun is evenly arranged along the circumference of described furnace chamber.
5. the method for employing oxygen enrichment vortex bath smelting furnace process zinc leaching slag according to claim 1, it is characterized in that, described body of heater is provided with overfiren air port, and the air outside described body of heater enters in described furnace chamber from described overfiren air port and participates in the secondary combustion etc. such as CO, Zn steam in stove.
6. the method for employing oxygen enrichment vortex bath smelting furnace process zinc leaching slag according to claim 1, it is characterized in that, the winding-up end of described spray gun is positioned at bottom, molten bath.
7. the method for employing oxygen enrichment vortex bath smelting furnace process zinc leaching slag according to claim 1, it is characterized in that, described spray gun dips down relative to horizontal direction and tiltedly arranges.
8. the method for employing oxygen enrichment vortex bath smelting furnace process zinc leaching slag according to claim 1, it is characterized in that, the bottom surface of described furnace chamber is segment-shaped.
9. the method for employing oxygen enrichment vortex bath smelting furnace process zinc leaching slag according to claim 1, it is characterized in that, described body of heater comprises roof, sidewall and is positioned at the cupola well of bottom, the flame retardant coating of described sidewall and described cupola well is magnesia chrome brick layer, and the flame retardant coating of described roof is the refractory steel fiber ramming bed of material or described roof is membrane wall.
10. the method for employing oxygen enrichment vortex bath smelting furnace process zinc leaching slag according to claim 9, it is characterized in that, the outside of the flame retardant coating of described sidewall is provided with copper water jacket cooling device.
The method of 11. employing oxygen enrichment vortex bath smelting furnace process zinc leaching slags according to claim 1, it is characterized in that, described spray gun is arranged on muzzle brick, and described muzzle brick is provided with described spray gun jack, and described muzzle brick and muzzle brick to cool copper water jacket combination-inlaying shape in aggregates.
The method of 12. employing oxygen enrichment vortex bath smelting furnace process zinc leaching slags according to claim 1, it is characterized in that, the gun slot height of described oxygen enrichment vortex bath smelting furnace is 400-1500mm from furnace bottom distance, and described slag notch is positioned at gun slot top 400-800mm; Described oxygen enrichment vortex bath smelting furnace also comprises drain and lower cinder notch, and described drain is positioned at furnace bottom, and described lower cinder notch is positioned at gun slot bottom 200-400mm, for hot lower replacing spray gun and muzzle brick.
The method of 13. employing oxygen enrichment vortex bath smelting furnace process zinc leaching slags according to claim 8, it is characterized in that, described furnace bottom has the wide straight joint of 2-5mm, and the steel plate of described furnace bottom is provided with the lead discharging mouth of diameter about 2cm, for when leaded in described zinc leaching slag, the metallic lead depositing to furnace bottom is discharged from described lead discharging mouth by described straight joint.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488808A (en) * | 2017-07-25 | 2017-12-19 | 攀钢集团研究院有限公司 | Pneumatic vanadium iron smelting furnace |
| CN115595450A (en) * | 2022-08-05 | 2023-01-13 | 昆明理工大学（Cn） | Zinc sulfide is through soaking device that silver was retrieved in sediment processing desulfurization |
-
2015
- 2015-06-30 CN CN201510373904.3A patent/CN104928497A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488808A (en) * | 2017-07-25 | 2017-12-19 | 攀钢集团研究院有限公司 | Pneumatic vanadium iron smelting furnace |
| CN107488808B (en) * | 2017-07-25 | 2019-11-12 | 攀钢集团研究院有限公司 | Pneumatic vanadium iron smelting furnace |
| CN115595450A (en) * | 2022-08-05 | 2023-01-13 | 昆明理工大学（Cn） | Zinc sulfide is through soaking device that silver was retrieved in sediment processing desulfurization |
| CN115595450B (en) * | 2022-08-05 | 2023-11-24 | 昆明理工大学 | Device for desulfurizing and recovering silver by zinc sulfide leaching residue treatment |
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Application publication date: 20150923 |