CN104152713A - Side-blowing lead melting reduction device - Google Patents
Side-blowing lead melting reduction device Download PDFInfo
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- CN104152713A CN104152713A CN201410426088.3A CN201410426088A CN104152713A CN 104152713 A CN104152713 A CN 104152713A CN 201410426088 A CN201410426088 A CN 201410426088A CN 104152713 A CN104152713 A CN 104152713A
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Abstract
The invention discloses a side-blowing lead melting reduction device. The side-blowing lead melting reduction device comprises a reduction furnace with a furnace body and a side-blowing spraying gun. A furnace chamber is arranged in the furnace body, a molten pool is formed on the lower portion of the furnace chamber, a smoke outlet is formed in the top of the furnace body, a cold material adding opening and a hot material adding opening are respectively formed in the upper portion of the side wall of the furnace body, and a side-blowing spraying gun hole, a siphoning lead outlet, a slag outlet and a bottom lead emptying opening for emptying the furnace chamber are respectively formed in the lower portion of the side wall of the furnace body. The side-blowing spraying gun is inserted into the side-blowing spraying gun hole and can be used for spraying low-heating-value combustible gas and oxygen-containing gas to the molten pool. According to the side-blowing lead melting reduction device, metallurgical coke or coke oven gas or natural gas or pea coal does not need to be used, due to use of the low-heating-value combustible gas, the cost is reduced, energy consumption is reduced, the combustible gas is sprayed into the molten pool through the side-blowing spraying gun, the stirring effect on a melt is improved, the reduction effect of lead is improved, the temperature in the furnace is easy to control, and the smoke rate is reduced.
Description
Technical field
The present invention relates to the plumbous device of a kind of refining, relate to particularly the plumbous melting reduction device of a kind of side-blown.
Background technology
Mainly contain QSL method, SKS method, Kivcet method, top blast submergence molten pool melting technology (being mainly Ausmelt method, ISA method and kaldo process) for the refining splicer skill of suitability for industrialized production both at home and abroad.These refine plumbous technology and are divided into substantially single step smelting lead and two steps refining splicer skill, there is oxidizing atmosphere and the unmanageable problem of reduction emphasis in single step smelting lead method, two step refining splicer skills are be oxidized respectively and reduce in two independent stoves, mainly contain SKS method and ISA-blast furnace reduction lead smelting process.But traditional plumbous reduction furnace need to consume expensive metallurgical coke, coke-oven gas, Sweet natural gas, beans or fine coal, cost is high, and energy consumption is high and dust rate is high.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of above-mentioned technical problem of the prior art.For this reason, one object of the present invention is to propose the plumbous melting reduction device of side-blown that a kind of cost is low, operating rate is high, energy consumption is low and dust rate is low.
According to the plumbous melting reduction device of the side-blown of the embodiment of the present invention, comprise: reduction furnace, described reduction furnace has body of heater, in described body of heater, there is furnace chamber, the formation molten bath, bottom of described furnace chamber, the top of described body of heater is provided with smoke outlet, and the top of the sidewall of described body of heater is respectively equipped with that cold burden adds entrance and heat material adds entrance, and the bottom of the sidewall of described body of heater is respectively equipped with side-blown spray gun hole, siphon lead taphole, slag notch and the plumbous drain in the end for emptying described furnace chamber; Be inserted in described side-blown spray gun hole and for spray into the side-blown spray gun of low heat value inflammable gas and oxygen-containing gas in described molten bath.
According to the plumbous melting reduction device of the side-blown of the embodiment of the present invention, compared with traditional reduction furnace, without using metallurgical coke, coke-oven gas, Sweet natural gas, beans or fine coal, but use low-calorie inflammable gas concurrent heating, for example water-gas, and by oxygen-enriched side-blown reducing, reduced cost, and Energy Intensity Reduction, and inflammable gas sprays in molten bath by side-blown spray gun, improve the stirring effect to melt, improved plumbous reduction effect, easy temperature control system in stove, avoid the too high interior temperature of stove, reduced dust rate.
Preferably, the top of the sidewall of described body of heater is also provided with overfiren air port.
Preferably, described slag notch is included on above-below direction higher than the upper slag notch in described side-blown spray gun hole with lower than the lower slag notch in described side-blown spray gun hole.
Preferably, the periphery wall in described molten bath comprises that refractory brick becomes and be located at the cooling element of described fire brick layer outside.
Preferably, described side-blown spray gun comprises: outer tube, and described outer tube is divided into outer tube leading portion and outer tube back segment; Inner tube, described inner tube is divided into inner tube leading portion and inner tube back segment, and described inner tube is located in described outer tube coaxially, forms annular inflammable gas passage between described inner tube and described outer tube; Intervalve, described intervalve is engaged between described outer tube leading portion and described inner tube leading portion, between the inwall of described outer tube and the outer wall of described intervalve, form along described intervalve extend axially and along circumferential isolated multiple outsides inflammable gas injection channel of described intervalve, between the inwall of described intervalve and the outer wall of described inner tube formation along described intervalve extend axially and along circumferential isolated multiple inner sides inflammable gas injection channel of described intervalve.
Preferably, the periphery wall of described inner tube leading portion is provided with multiple axial inner tube grooves, multiple described axial inner tube grooves are circumferentially arranged spaced apart along described inner tube, and described inner side inflammable gas injection channel is limited by the inwall of described axial inner tube groove and described intervalve; The periphery wall of described intervalve is provided with multiple axial intervalve grooves, multiple described axial intervalve grooves are circumferentially arranged spaced apart along described intervalve, and described outside inflammable gas injection channel is limited by inwall and the described axial intervalve groove of described outer tube.
Preferably, the axial length of described intervalve equals respectively the axial length of described outer tube leading portion and described inner tube leading portion.
Preferably, described oxygen-containing gas is oxygen-rich air.
Preferably, the oxygen concentration in described oxygen-rich air is between 22%-80%.
Preferably, described low heat value inflammable gas is at least one in water-gas, producer gas, blast furnace gas and coal gas of converter.
Brief description of the drawings
Fig. 1 is according to the schematic diagram of the reduction furnace of the plumbous melting reduction device of the side-blown of the embodiment of the present invention.
Fig. 2 is according to the schematic diagram of the side-blown spray gun of the plumbous melting reduction device of the side-blown of the embodiment of the present invention.
Fig. 3 is the cross-sectional schematic of the leading portion of side-blown spray gun shown in Fig. 2.
Fig. 4 is according to the operating process schematic diagram of the plumbous melting reduction device of the side-blown of the embodiment of the present invention.
Fig. 5 is the operating process schematic diagram of plumbous melting reduction device of blowing side according to another embodiment of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of instructions such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under Second Characteristic and tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
Describe according to the plumbous melting reduction device of the side-blown of the embodiment of the present invention below with reference to Fig. 1-3.
As Figure 1-3, comprise reduction furnace 1 and side-blown spray gun 2 according to the plumbous melting reduction device of the side-blown of the embodiment of the present invention.Reduction furnace 1 has body of heater 11, in body of heater 11, there is furnace chamber 111, the formation molten bath, bottom of furnace chamber 111, the top of body of heater 11 is provided with smoke outlet 13, the top of the sidewall of body of heater 11 is respectively equipped with that cold burden adds entrance 15 and heat material adds entrance 12, and the bottom of the sidewall of body of heater 11 is respectively equipped with side-blown spray gun hole 18, siphon lead taphole 16, slag notch 19 and the plumbous drain 20 in the end for emptying furnace chamber 111.Side-blown spray gun 2 is inserted in side-blown spray gun hole 18, for spray into low heat value inflammable gas and oxygen-containing gas in molten bath.
In some embodiments of the invention, oxygen-containing gas can be oxygen-rich air, and particularly, the oxygen concentration in oxygen-rich air is between 22%-80%.In addition, in the description of the embodiment of the present invention, low heat value inflammable gas refers to that calorific value is less than or equal to the fuel gas of 2800 kilocalories/cubic metre, for example, can be at least one in water-gas, producer gas, blast furnace gas and coal gas of converter.Preferably, be water-gas.
According to the plumbous melting reduction device of the side-blown of the embodiment of the present invention, compared with traditional reduction furnace, without using metallurgical coke, coke-oven gas, Sweet natural gas, beans or fine coal, but use low-calorie inflammable gas concurrent heating, for example water-gas, and by oxygen-enriched side-blown reducing, reduced cost, and Energy Intensity Reduction, and inflammable gas sprays in molten bath by side-blown spray gun, improve the stirring effect to melt, improved plumbous reduction effect, easy temperature control system in stove, avoid the too high interior temperature of stove, reduced dust rate.
In preferred embodiments more of the present invention, the top of the sidewall of body of heater 11 is also provided with overfiren air port 14.Can blast air to top, the interior molten bath of furnace chamber 111 by overfiren air port 14, thereby the superfluous combustiblecomponents in combustion product gases, for example carbon monoxide, reduce the combustiblecomponents in flue gas, improve safety and environmental protection performance, and the heat that the burning of superfluous combustiblecomponents produces can be the interior concurrent heating of furnace chamber 111, has further reduced energy consumption.
Preferably, slag notch 19 is included on above-below direction higher than the upper slag notch 191 in side-blown spray gun hole 18 with lower than the lower slag notch 192 in described side-blown spray gun hole 18.When plumbous melting reduction device normal running, can pass through upper slag notch 191 deslagginves in side-blown, in the time that needs are changed side-blown spray gun 2, by lower slag notch 192, slag liquid level is reduced to below side-blown spray gun hole 18, thereby conveniently change rifle.In addition, lower slag notch 192 can be for discharging viscous slag.
As shown in Figure 1, in preferred exemplary of the present invention, the periphery wall in molten bath is become and is located at the cooling element 17 of fire brick layer outside by refractory brick, and for example watercooling jacket forms.Traditional molten bath life-span being made up of separately refractory brick is short, and the traditional molten bath being made up of separately water jacket heat radiation is many, and energy consumption is high, poor stability.According to embodiments of the invention, the wall in molten bath forms by being positioned at the refractory brick of internal layer and being positioned at outer field cooling element 17, has therefore reduced on the one hand heat dissipation capacity, reduces energy consumption, has improved security.
As shown in Figure 2, comprise outer tube 22, inner tube 21 and intervalve 23 according to the side-blown spray gun 2 of the plumbous melting reduction device of the side-blown of the embodiment of the present invention.
As shown in Figure 2, side-blown spray gun 2 comprises side-blown spray gun leading portion 2A and side-blown spray gun back segment 2B, and side-blown spray gun leading portion 2A also can be called rifle head, and the length of side-blown spray gun leading portion 2A and side-blown spray gun back segment 2B and concrete division can be determined according to specific needs.Correspondingly, outer tube 22 is divided into outer tube leading portion and outer tube back segment.
In like manner, inner tube 21 is divided into inner tube leading portion and inner tube back segment, and inner tube 21 is located in outer tube 22 coaxially, forms annular inflammable gas passage 221 between inner tube 21 and outer tube 22.Inflammable gas passage 221 can be connected with flammable source of the gas.The inner chamber of inner tube 21 forms oxygen channel 211, can be connected with source of oxygen.
Intervalve 23 is engaged between outer tube leading portion and inner tube leading portion, between the outer wall of the inwall of outer tube 22 and intervalve 23, form along intervalve 23 extend axially and along circumferential isolated multiple outsides inflammable gas injection channel of intervalve 23, between the inwall of intervalve 23 and the outer wall of inner tube 21 formation along intervalve 23 extend axially and along circumferential isolated multiple inner sides inflammable gas injection channel of intervalve 23.In other words, by intervalve 23 is set, inflammable gas passage 221 between outer tube leading portion and inner tube leading portion is divided into the multiple inner sides inflammable gas injection channel, inner side inflammable gas injection channel and the inflammable gas channel connection of outside inflammable gas injection channel all and between outer tube back segment and inner tube back segment that are positioned at multiple outsides inflammable gas passage in outside and are positioned at inner side.Thus, by multiple inner sides inflammable gas injection channel and outside inflammable gas injection channel, low-calorie inflammable gas is ejected in molten bath, has improved jeting effect, increased projected area, improved plumbous reduction effect.
Preferably, the periphery wall of inner tube leading portion is provided with multiple axial inner tube grooves 212, multiple axial inner tube grooves 212 are circumferentially arranged spaced apart along inner tube 21, inner side inflammable gas injection channel is limited by axial inner tube groove 212 and the inwall of intervalve 23, for example the inwall of intervalve 23 contacts with the outer wall of inner tube 21, seals axial inner tube groove 212 to form inner side inflammable gas injection channel.
In like manner, the periphery wall of intervalve 23 is provided with multiple axial intervalve grooves 231, and multiple axial intervalve grooves 231 are circumferentially arranged spaced apart along intervalve 23, and outside inflammable gas injection channel is limited with axial intervalve groove 231 by the inwall of outer tube 22.In other words, the inwall of outer tube 22 contacts with the outer wall of intervalve 23, seals axial intervalve groove 231 to form outside inflammable gas injection channel.
Preferably, the axial length of intervalve 23 equals respectively the axial length of outer tube leading portion and inner tube leading portion, and intervalve 23 can weld with inner tube 21 and outer tube 22.
Be understandable that, outside inflammable gas injection channel can limit by being formed on axial recess on outer tube 22 inwalls and the outer wall of intervalve 23, and inner side inflammable gas injection channel can limit by being formed on axial recess on the inwall of intervalve 23 and the outer wall of inner tube 21.
It will be appreciated by those skilled in the art that, the side-blown spray gun leading portion 2A of side-blown spray gun 2 and side-blown spray gun back segment 2B can form in split, then weld together.
Describe according to the operating process of the plumbous melting reduction device of the side-blown of the embodiment of the present invention in conjunction with Fig. 1-3 below with reference to Fig. 4 and Fig. 5.
As shown in Figure 4, as follows according to the operating process of the plumbous melting reduction device of the side-blown of the embodiment of the present invention:
The lead-containing material of melting is for example added in the furnace chamber that entrance joins reduction furnace from the heat material of reduction furnace by chute;
Flux is added to entrance from the cold burden of reduction furnace to be joined in furnace chamber;
By side-blown spray gun to the side from reduction furnace by spraying into oxygen-containing gas and low heat value inflammable gas in the molten bath in reduction furnace, obtain lead bullion and slag;
Discharge lead bullion from the siphon lead taphole of reduction furnace, discharge described slag from the slag notch of reduction furnace, discharge the flue gas in furnace chamber from the smoke outlet of reduction furnace.
According to the operating process of the plumbous melting reduction device of the side-blown of the embodiment of the present invention, without using metallurgical coke, coke-oven gas, Sweet natural gas, beans or fine coal, but use low-calorie inflammable gas concurrent heating, for example water-gas, in conjunction with oxygen-enriched side-blowing melting, reduce cost, and Energy Intensity Reduction, and inflammable gas blows side in molten bath, improve the stirring effect to melt, improved plumbous reduction effect, reduced dust rate.
As shown in Figure 5, the operating process of plumbous melting reduction device of blowing side according to the preferred embodiment of the invention further comprises that add entrance by described cold burden adds leaded cold burden in described furnace chamber, add entrance by described cold burden and add solid reductant in described furnace chamber, for example lump coal, and the superfluous combustiblecomponents that air produces in furnace chamber with oxidation is sent in top from the side in furnace chamber to molten bath.
As mentioned above, oxygen-containing gas is oxygen-rich air, and for example the oxygen concentration in oxygen-rich air is between 22%-80%.Low heat value inflammable gas is at least one in water-gas, producer gas, blast furnace gas and coal gas of converter, is preferably water-gas.
It will be appreciated by those skilled in the art that, in when operation, spray into low heat value inflammable gas in molten bath excessive with respect to oxygen, to maintain furnace reduction atmosphere, be not described in detail here.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description, instead of must be limited in described embodiment.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And specific features, structure, material or the feature of description can suitable mode be combined in any one or more embodiment or example.In addition, those skilled in the art can easily carry out combination and combination by different embodiment, example and the technical scheme described in this specification sheets and their at least a portion technical characterictic as the case may be.
Although illustrated and described embodiments of the invention and example above, be understandable that, above-described embodiment and example are exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment and example without departing from the scope of the invention, amendment, replacement and modification.
Claims (10)
1. the plumbous melting reduction device of side-blown, is characterized in that, comprising:
Reduction furnace, described reduction furnace has body of heater, in described body of heater, there is furnace chamber, the formation molten bath, bottom of described furnace chamber, the top of described body of heater is provided with smoke outlet, the top of the sidewall of described body of heater is respectively equipped with that cold burden adds entrance and heat material adds entrance, and the bottom of the sidewall of described body of heater is respectively equipped with side-blown spray gun hole, siphon lead taphole, slag notch and the plumbous drain in the end for emptying described furnace chamber;
Be inserted in described side-blown spray gun hole and for spray into the side-blown spray gun of low heat value inflammable gas and oxygen-containing gas in described molten bath.
2. the plumbous melting reduction device of side-blown according to claim 1, is characterized in that, the top of the sidewall of described body of heater is also provided with overfiren air port.
3. the plumbous melting reduction device of side-blown according to claim 1 and 2, is characterized in that, described slag notch is included on above-below direction higher than the upper slag notch in described side-blown spray gun hole with lower than the lower slag notch in described side-blown spray gun hole.
4. according to the plumbous melting reduction device of the side-blown described in any one in claim 1-3, it is characterized in that, the periphery wall in described molten bath comprises that refractory brick becomes and be located at the cooling element of described fire brick layer outside.
5. according to the plumbous melting reduction device of the side-blown described in any one in claim 1-4, it is characterized in that, described side-blown spray gun comprises:
Outer tube, described outer tube is divided into outer tube leading portion and outer tube back segment;
Inner tube, described inner tube is divided into inner tube leading portion and inner tube back segment, and described inner tube is located in described outer tube coaxially, forms annular inflammable gas passage between described inner tube and described outer tube;
Intervalve, described intervalve is engaged between described outer tube leading portion and described inner tube leading portion, between the inwall of described outer tube and the outer wall of described intervalve, form along described intervalve extend axially and along circumferential isolated multiple outsides inflammable gas injection channel of described intervalve, between the inwall of described intervalve and the outer wall of described inner tube formation along described intervalve extend axially and along circumferential isolated multiple inner sides inflammable gas injection channel of described intervalve.
6. the plumbous melting reduction device of side-blown according to claim 5, it is characterized in that, the periphery wall of described inner tube leading portion is provided with multiple axial inner tube grooves, multiple described axial inner tube grooves are circumferentially arranged spaced apart along described inner tube, and described inner side inflammable gas injection channel is limited by the inwall of described axial inner tube groove and described intervalve;
The periphery wall of described intervalve is provided with multiple axial intervalve grooves, multiple described axial intervalve grooves are circumferentially arranged spaced apart along described intervalve, and described outside inflammable gas injection channel is limited by inwall and the described axial intervalve groove of described outer tube.
7. according to the plumbous melting reduction device of the side-blown described in claim 5 or 6, it is characterized in that, the axial length of described intervalve equals respectively the axial length of described outer tube leading portion and described inner tube leading portion.
8. according to the plumbous melting reduction device of the side-blown described in any one in claim 1-7, it is characterized in that, described oxygen-containing gas is oxygen-rich air.
9. the plumbous melting reduction device of side-blown according to claim 8, is characterized in that, the oxygen concentration in described oxygen-rich air is between 22%-80%.
10. according to the plumbous melting reduction device of the side-blown described in any one in claim 1-9, it is characterized in that, described low heat value inflammable gas is at least one in water-gas, producer gas, blast furnace gas and coal gas of converter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410426088.3A CN104152713A (en) | 2014-08-26 | 2014-08-26 | Side-blowing lead melting reduction device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410426088.3A CN104152713A (en) | 2014-08-26 | 2014-08-26 | Side-blowing lead melting reduction device |
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| CN104152713A true CN104152713A (en) | 2014-11-19 |
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| CN201410426088.3A Pending CN104152713A (en) | 2014-08-26 | 2014-08-26 | Side-blowing lead melting reduction device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483393A (en) * | 2015-11-25 | 2016-04-13 | 中国恩菲工程技术有限公司 | Method for treating secondary lead through improved side-blowing smelting reduction furnace |
| WO2017197985A1 (en) * | 2016-05-16 | 2017-11-23 | 中国恩菲工程技术有限公司 | Side-submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized coal |
| CN107560440A (en) * | 2017-09-20 | 2018-01-09 | 中国恩菲工程技术有限公司 | The processing method of spray gun pipette tips, the spray gun with it and spray gun pipette tips |
| CN111748697A (en) * | 2019-03-28 | 2020-10-09 | 中国瑞林工程技术股份有限公司 | Smelting furnace |
| CN111996389A (en) * | 2020-08-28 | 2020-11-27 | 刘会正 | Side-blown reduction furnace |
| CN113846202A (en) * | 2021-10-26 | 2021-12-28 | 西安建筑科技大学 | Gas-based shaft furnace reduction gas nozzle and gas-based shaft furnace |
-
2014
- 2014-08-26 CN CN201410426088.3A patent/CN104152713A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483393A (en) * | 2015-11-25 | 2016-04-13 | 中国恩菲工程技术有限公司 | Method for treating secondary lead through improved side-blowing smelting reduction furnace |
| CN105483393B (en) * | 2015-11-25 | 2017-11-21 | 中国恩菲工程技术有限公司 | A kind of method that reviver is handled using the side-blown fusion reducing furnace of modified |
| WO2017197985A1 (en) * | 2016-05-16 | 2017-11-23 | 中国恩菲工程技术有限公司 | Side-submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized coal |
| CN107560440A (en) * | 2017-09-20 | 2018-01-09 | 中国恩菲工程技术有限公司 | The processing method of spray gun pipette tips, the spray gun with it and spray gun pipette tips |
| CN107560440B (en) * | 2017-09-20 | 2024-04-12 | 中国恩菲工程技术有限公司 | Spray gun head, spray gun with spray gun head and processing method of spray gun head |
| CN111748697A (en) * | 2019-03-28 | 2020-10-09 | 中国瑞林工程技术股份有限公司 | Smelting furnace |
| CN111996389A (en) * | 2020-08-28 | 2020-11-27 | 刘会正 | Side-blown reduction furnace |
| CN113846202A (en) * | 2021-10-26 | 2021-12-28 | 西安建筑科技大学 | Gas-based shaft furnace reduction gas nozzle and gas-based shaft furnace |
| CN113846202B (en) * | 2021-10-26 | 2022-07-19 | 西安建筑科技大学 | Gas-based shaft furnace reduction gas nozzle and gas-based shaft furnace |
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Application publication date: 20141119 |