CN102874862B - Production and calcination process and equipment of spontaneous-combustion environmental-protection zinc oxide - Google Patents
Production and calcination process and equipment of spontaneous-combustion environmental-protection zinc oxide Download PDFInfo
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- CN102874862B CN102874862B CN201210394219.5A CN201210394219A CN102874862B CN 102874862 B CN102874862 B CN 102874862B CN 201210394219 A CN201210394219 A CN 201210394219A CN 102874862 B CN102874862 B CN 102874862B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a production and calcination process of spontaneous-combustion environmental-protection zinc oxide. The process adopts a way of continuous production with negative pressure, zinc raw materials and oxygen conduct an oxidation-reduction reaction in an oxidation furnace to generate zinc oxide, a large amount of enthalpy is rejected at the same time, and the zinc oxide is obtained after working procedures of cooling and powder collecting. The outlet end of the oxidation furnace is connected with a calcination furnace, the gaseous zinc raw materials entering the calcination furnace from the oxidation furnace and oxygen conduct the oxidation-reduction reaction again to generate zinc oxide, a large amount of enthalpy is rejected, the directly-collected powder is calcined through a lot of heat from the oxidation furnace, and then the calcined zinc oxide is obtained after the working procedures of cooling and powder collecting. The process utilizes the own enthalpy of the raw materials to produce the zinc oxide and the calcined zinc oxide, and the purposes of saving energy, protecting environment, reducing the production cost, reducing the labor strength and increasing the production efficiency are achieved through a continuous automatic production way.
Description
Technical field
The invention belongs to zinc oxide to produce and calcining process and equipment technical field, what relate generally to is a kind of spontaneous combustion environment-friendly type zinc oxide
Produce and calcining process and equipment.
Background technology
Oxide powder and zinc is a kind of white or micro-yellowy fine-powder, is widely used in one of important industrial chemicals of the industries such as pottery, rubber, oil, glass, medicine, chemical industry.At present, the production technique of zinc oxide is divided into direct method, indirect method and ammoniation process.Before 10 years, direct method technique mainly with zinc ore concentrate for raw material, through high temperature desulfurizing, oxidizing roasting becomes calcining, then coal is reduced to zinc fume, and zinc fume and atmospheric oxidation obtain zinc oxide.Now main starting material are zinc gray---pot galvanize, the useless ash of zinc hydrometallurgy industry grade for zinc compound.This handicraft product purity is low, and generally between 90%--99.5%, foreign matter content is high, and cost is low; Indirect method take metallic zinc as raw material, metallic zinc fused in evaporation crucible, heating and gasifying, with atmospheric oxidation, obtain finished product, different zinc ingot metal raw materials through the trapping of Leng They cloth bag, the purity zinc oxide produced is also different, and this technique mainly produces the zinc oxide of 99.5%--99.7%.Advantage is that content is high, and output is large, and technique easily controls; Ammoniation process take zinc compound as raw material, and through the active zinc flower that the wet processing of complexity is produced, the advantage of this handicraft product: active large, is suitable for rubber-like and uses, and can receive the effect that the few degree of crosslinking of consumption is high.
Above-mentioned three kinds of methods, no matter any needs consumes a large amount of energy, cause the production cost of zinc oxide occupy high-leveled and difficult under.In order to reduce production cost, most manufacturing enterprise can select the coal of less expensive to produce zinc oxide, because coal can produce the noxious pollutants such as sulphur, dust and waste residue in combustion, therefore, also need to increase the environmental protection equipment such as dedusting, sulphur removal to avoid environmental pollution, still can increase the production cost of zinc oxide.In addition, above-mentioned technique is all discontinuous, can not continuous seepage, is generally stove production once, namely produced a stove zinc oxide, after removing slag, then next stove zinc oxide produced by material loading again, not only time-consuming, and labour intensity is very large, seriously limits the production efficiency of zinc oxide.Moreover the production unit of existing calcining powder is separated with the production unit directly receiving powder, calcining powder calcines rear acquisition to straight receipts powder, there is high energy consumption, high pollution, production efficiency is low, production cost is high problem equally.
Summary of the invention
Object of the present invention produces thus, proposes the Processes and apparatus that a kind of spontaneous combustion environment-friendly type zinc oxide is produced and calcined.Utilize the heat content of raw material self to produce zinc oxide and calcining zinc oxide, by the mode of production of continuity automatization, reach energy-conserving and environment-protective, reduce production cost, reduce labour intensity, the object of enhancing productivity.
The present invention realizes the technical scheme that above-mentioned purpose takes: a kind of production technique of spontaneous combustion environment-friendly type zinc oxide, adopt negative pressure quantity-produced mode, in oxidized still, there is redox reaction by making zinc raw material and oxygen and generate zinc oxide, release a large amount of heat contents, by obtaining zinc oxide after cooling, receipts powder operation simultaneously.
The present invention connects calcining furnace by the exit end at above-mentioned oxidized still, enter gaseous state zinc raw material in it and oxygen by oxidized still redox reaction occurs again to generate zinc oxide and release a large amount of heat contents, and the amount of heat of to be come by oxidized still is calcined straight powder of receiving, then by refrigerating work procedure, receive powder operation after obtain calcining zinc oxide.
Zinc raw material in the above-mentioned oxidized still of the present invention is rolling condition.
Zinc oxide in the above-mentioned calcining furnace of the present invention is rolling condition.
The equipment that the present invention realizes above-mentioned zinc oxide production technique comprises condensing chamber, receive powder room, induced draft fan, packaging facilities, transfer equipment and oxidized still, molten zinc room, oxidized still charger, molten zinc room is connected to the exit end of oxidized still, molten zinc room is provided with oxidized still charger and zinc melting pot burner, the discharge port position of oxidized still charger is positioned at oxidized still, the discharge port of molten zinc room is connected with condensing chamber by connecting tube, receipts powder equipment is provided with in condensing chamber, this receipts powder equipment is connected with packaging facilities by transfer equipment, receipts powder indoor are provided with receipts powder equipment, this receipts powder equipment is connected with packaging facilities through transfer equipment.
The present invention is connected with calcining furnace and calcining furnace feed compartment between described molten zinc room is connected with condensing chamber; Transport pipe is connected with between molten zinc room and packaging facilities, being communicated with of the entrance end of calcining furnace and molten zinc room, exit end are communicated with condensing chamber through calcining furnace feed compartment, calcining furnace feed compartment is provided with calcining furnace charging machine, it is indoor that the discharge port position of described calcining furnace charging machine is positioned at molten zinc, calcining furnace feed compartment by pipeline respectively with condensing chamber with receive powder room and be communicated with.
The present invention is connected with gas blower and oxidized still burner at the burner of described oxidized still or stove tail.
Oxidized still of the present invention is rotary kiln or rotary oven or other rolling rotary ovens.
Receipts powder equipment of the present invention and packaging facilities are Semi-automatic device or automatic equipment.
Calcining furnace of the present invention is rotary kiln or rotary oven or other rolling rotary ovens.
The present invention, according to the research and development of thermodynamics ultimate principle, can know from thermodynamics ultimate principle: the inside of any material all includes certain thermodynamic energy, is called heat content.That is, heat content is had in metallic zinc.As long as create suitable condition to be discharged, make it not only to work as fuel when raw material, that petty production zinc oxide just can without external heat.
Thermo-chemical reaction equation according to zinc and oxygen can calculate heat content (combustion heat):
Zn
（s）+1/2O
2(g)=ZnO
（s）+
△fH
(-)
△fH
(-)=
△fH
(-)（ZnO
（s））+
△fH
(-)（Zn
（s））+1/2
△fH
(-)（O
2(g)）
=-348.28KJ.mol
-1+0+0
=-348.28KJ.mol
-1
Namely zinc under given conditions, and generate zinc oxide with oxygen generation redox reaction and release a large amount of heat, its heat and high-quality coal are substantially suitable.The production of zinc oxide can not only be made to continue to carry out, also enough calcining zinc oxides.
The present invention, compared with the production technique of existing zinc oxide, has following advantage:
1, energy-conservation: if the heat energy that current technology consumes is converted into coal, then novel process often produces one ton of zinc oxide, uses 0.7 ton of coal lesser than indirect method, uses 1 ton lesser than wet method, uses 2 tons lesser than direct method.For the flat kiln of 12M2, become heavy zinc oxide to calculate by Production Equipment of 2000 t Capacity Per American process zinc oxide one-step calcination of going forward side by side, every year can less with 5600 tons of high-quality anthracites.According to relevant data, 09,10, over 11 three years, the whole nation is annual produces about 1,000,000 tons, zinc oxide, wherein direct method about 550,000 tons, indirect method 350,000 tons.Calculate thus, every year can less with more than 130 ten thousand tons of coals, energy-saving effect clearly, can reduce the production cost of zinc oxide greatly.
2, environmental protection: all waste gas, the waste residue that do not have coal combustion to produce is the novel process of very environmental protection.
3, technique, equipment modernization: compared with Traditional Method, greatly reduce labour intensity, improve production environment; Energy automatization, intellectuality, large scale continuous prod, effectively enhance productivity.Its social benefit will highly significant, and to transition of zinc oxide industry, upgrading significant, is a novel process be worthy to be popularized.
In production process of the present invention, except normal lighting, device drives and intensification igniting, need not any extra power, only utilizing the heat content of zinc raw material self to produce zinc oxide and calcining zinc oxide, not only energy-conservation but also environmental protection, is break away from the new outlet of of current predicament.And can according to different clients, simultaneously output be applicable to rubber, Phosphating Solution and petroleum additive etc. straight receipts powder, be applicable to the calcining powder of household china and the roasting powder of frit.Every quality index such as its whiteness, grade, granularity close to indirect process zinc oxide, higher than American process zinc oxide.The bulk density of calcining zinc oxide can require to adjust arbitrarily between 0.5-1.5g/cm3 according to user.Calcining temperature reaches as high as 1300-13500C.
Accompanying drawing explanation
Fig. 1 is zinc oxide production unit structural representation of the present invention.
Fig. 2 is the structural representation of zinc oxide of the present invention and calcining zinc oxide production unit.
In figure: 1, oxidized still, 2, molten zinc room, 3, calcining furnace, 4, condensing chamber, 5, receive powder room, 6, induced draft fan, 7, calcining furnace charging machine, 8, oxidized still charger, 9, the slag car, 10, calcining furnace powder-recepting machine, 11, receive powder equipment, 12 receive powder equipments, 13, packaging facilities, 14, transfer equipment, 15, gas blower, 16, oxidized still burner, 17, molten zinc room burner.
Embodiment
By reference to the accompanying drawings, provide embodiments of the invention as follows, but the present invention do not limit to following examples as.
The production of zinc oxide described in the present embodiment and calcining process, in oxidized still, place zinc raw material, by external heat heated oxide stove, the temperature in oxidized still is reached after more than 900 DEG C and closes external heat, this temperature can make the zinc raw material in oxidized still and oxygen react.Adopt negative pressure quantity-produced mode, by making zinc raw material and oxygen in oxidized still after abundant hybrid reaction, utilize zinc raw material and oxygen generation redox reaction to generate zinc oxide and release a large amount of heat contents and burning is carried out to raw material form gaseous feed, by refrigerating work procedure, receive powder operation after obtain zinc oxide.In order to make zinc raw material Thorough combustion, zinc raw material is rolling condition in oxidized still, and the zinc oxide of generation is separated from zinc raw material, does not affect the burning of zinc source material.If need calcining zinc oxide be produced, calcining furnace can be connected at the exit end of oxidized still, gaseous state zinc raw material in it and oxygen is entered again fully after hybrid reaction by oxidized still, the heat content of zinc raw material self is utilized to burn to gaseous state zinc raw material, by obtaining calcining zinc oxide after refrigerating work procedure, receipts powder operation.In order to make zinc raw material Thorough combustion, zinc raw material constantly rolls in calcining furnace, makes calcining even.Zinc raw material is the material containing zincs such as zinc ingot metal, crude zinc, cadmia.
The present invention realizes the equipment that above-mentioned production technique adopts two kinds, and a kind of is the simple equipment producing zinc oxide, and another kind is zinc oxide and calcining zinc oxide quantity-produced equipment.
Figure 1 shows that zinc oxide production unit, its primarily of oxidized still 1, molten zinc room 2, condensing chamber 4, receive powder room 5, induced draft fan 6, oxidized still charger 8, the slag car 9, receive powder equipment 11,12, packaging facilities 13, transfer equipment 14, gas blower 15 and oxidized still burner 16 form, oxidized still 1 is known rotary kiln, rotary oven and other rolling rotary ovens etc., effect is that the zinc oxide generated in it is separated from zinc raw material, does not affect the burning of zinc source material; The interior shirt portion material of oxidized still must have and prevents zinc liquid from permeating, and resistant to elevated temperatures characteristic.Be connected with gas blower 15 and oxidized still burner 16 at oxidized still 1 burner or stove tail, gas blower 15 can control oxygen feeding amount (not using in normal production).Oxidized still burner 16 can heat oxidized still 1, the temperature of controlled oxidization stove, can also control amount and the speed of zinc oxidation simultaneously.Be connected with molten zinc room 2 at the exit end of oxidized still 1, effect is molten zinc, purification, heats up.Molten zinc room 2 is provided with oxidized still charger 8 and molten zinc room burner 17, and the discharge port position of oxidized still charger 8 is positioned at oxidized still 1, in working order, is added in zinc melting pot by zinc raw material, then enters in oxidized still 1.The discharge port of molten zinc room 2 is connected with condensing chamber 4 by connecting tube, what condensing chamber 4 adopted is conventional (water-cooled or air-cooled) device, be provided with in it and receive powder equipment 11, this receipts powder equipment 11 is conventional chain-type powder-recepting machine, it is connected with packaging facilities 13 by transfer equipment 14, and what transfer equipment 14 and packaging facilities 13 adopted is all known equipment.The gas outlet end of condensing chamber 4 is connected with receipts powder room 5 by pipeline, induced draft fan 6 is provided with in pipeline, form negative pressure, still powder room 5 adduction powder is received containing the suction of zinc oxide air-flow by condensing chamber 4, what receive powder room 5 employing is conventional filter bag type cleaning apparatus, also be provided with in receipts powder room 5 and receive powder equipment 12, this receipts powder equipment 12 is also conventional chain-type powder-recepting machine, and it is also connected with packaging facilities 13 through transfer equipment 14.Oxidized still 1 head is provided with the slag car 9, the material slag reacting generation in oxidized still 1 is transported to slag field.
Figure 2 shows that the production unit of zinc oxide and calcining zinc oxide.It is primarily of oxidized still 1, molten zinc room 2, condensing chamber 4, receive powder room 5, induced draft fan 6, oxidized still charger 8, the slag car 9, receive powder equipment 11,12, on the architecture basics of zinc oxide production unit that forms of packaging facilities 13, transfer equipment 14, gas blower 15 and oxidized still burner 16, between molten zinc room 2 is connected with condensing chamber 4, be connected with calcining furnace 3 and calcining furnace feed compartment 7; Between molten zinc room 2 and packaging facilities 13, be connected with transport pipe, in molten zinc room 2, be provided with calcining furnace powder-recepting machine 10.Being communicated with of the entrance end of calcining furnace 3 and molten zinc room 2, exit end are communicated with condensing chamber 4 through calcining furnace feed compartment 7, calcining furnace feed compartment 7 is provided with calcining furnace charging machine, the discharge port position of described calcining furnace charging machine is positioned at molten zinc room 2, calcining furnace feed compartment 7 by pipeline respectively with condensing chamber 4 with receive powder room 5 and be communicated with.Calcining furnace 3 is rotary kiln, rotary oven and other rolling rotary ovens etc., and it can make zinc oxide constantly roll, thus calcining evenly.
Charging equipment in aforesaid device, receives powder equipment and packaging facilities can adopt Semi-automatic device or automatic equipment according to demand, reduces labour intensity further thus, increases economic efficiency.Charging equipment comprises zinc source material charging equipment, calcining furnace charging equipment.Receive powder equipment and comprise calcining furnace receipts powder equipment, condensing chamber is received powder equipment and is received powder room and receives powder equipment.
The present embodiment also can adopt known electric control system to control induced draft fan 6, gas blower 15, oxidized still burner 16 and molten zinc room burner 17 etc.
In use, first with fuel, oxidized still is heated to more than 900 DEG C, adds the raw material of containing metal zinc from molten zinc room, zinc and oxygen generate zinc oxide at oxidized still vigorous combustion, discharge a large amount of heat energy simultaneously.Temperature-stable can between 900-1350 DEG C, and the waste residue produced in oxidized still is delivered to slag field and deposited after being collected by the slag car.High temperature gas flow in oxidized still enters condensing chamber, through progressively lowering the temperature, thus sub-elects the straight receipts powder of different grades.Air-flow through condensation enters receipts powder room by induced draft fan, and the zinc oxide in air-flow collected by the filter bag received in powder room, simultaneously Exhaust Gas.By receiving the straight receipts powder of the different grades that powder equipment is collected.Do not need calcine, deliver to packing shop carry out packaging put in storage; Needs calcining, be sent to calcining furnace by feeder equipment and calcine, the high temperature gas flow that induced draft fan will produce in oxidized still introduces calcining furnace, and zinc fume wherein and oxygen burn again, thus calcining zinc oxide.The method of this calcining zinc oxide can save mass energy, reduces costs.
Claims (7)
1. the production technique of a spontaneous combustion environment-friendly type zinc oxide, it is characterized in that: in oxidized still (1), place zinc raw material, zinc raw material is placed in oxidized still, by external heat heated oxide stove (1), the temperature more than 900 DEG C in oxidized still is made to close external heat, adopt negative pressure quantity-produced mode, zinc oxide is generated by adding oxygen and making zinc raw material, at rolling condition and oxygen, redox reaction occur in oxidized still, and after the heat content discharged when utilizing zinc raw material and oxygen generation oxidizing reaction to generate zinc oxide carries out laser heating to the raw material that molten zinc room (2) newly adds, zinc raw material in molten zinc room (2) enters in oxidized still (1) continuously, zinc oxide is generated with oxygen generation redox reaction under rolling condition, realize continuous seepage zinc oxide, finally, pass through refrigerating work procedure, zinc oxide is obtained after receiving powder operation.
2. the production technique of spontaneous combustion environment-friendly type zinc oxide according to claim 1, it is characterized in that: connect calcining furnace at the exit end of above-mentioned oxidized still, enter gaseous state zinc raw material in it and oxygen by oxidized still redox reaction occurs again to generate zinc oxide and release a large amount of heat contents, and the amount of heat of to be come by oxidized still is calcined straight powder of receiving, then by refrigerating work procedure, receive powder operation after obtain calcining zinc oxide.
3. the production technique of spontaneous combustion environment-friendly type zinc oxide according to claim 2, it is characterized in that: the zinc oxide in described calcining furnace is rolling condition, and utilize the heat content of zinc burning release in oxidized still again to calcine the zinc oxide in calcining furnace, produce calcining zinc oxide.
4. one kind realizes the equipment of zinc oxide production technique described in claim 1, comprise condensing chamber (4), receive powder room (5), induced draft fan (6), packaging facilities (13) and transfer equipment (14), it is characterized in that: also comprise oxidized still (1), molten zinc room (2), oxidized still charger (8), the raw material of containing metal zinc is added in oxidized still charger (8) in described molten zinc room (2), by molten zinc room burner (17), indirect heating is carried out to molten zinc room (2) when the temperature in oxidized still reaches oxidizing reaction, close down molten zinc room burner (17), the heat energy discharged when utilizing zinc and oxygen to generate zinc oxide in oxidized still (1) proceeds oxidizing reaction to the raw material newly added, high temperature gas flow in oxidized still (1) is by condensing chamber (4), through progressively lowering the temperature, sub-elect the straight receipts powder of different grades, calcining furnace (3) is connected by the exit end at oxidized still (1), enter gaseous state zinc raw material in it and oxygen by oxidized still redox reaction occurs again to generate zinc oxide and release a large amount of heat contents, and the amount of heat of to be come by oxidized still is calcined straight powder of receiving, then the air-flow through condensation enters receipts powder room (5) by receipts powder equipment (11) (12) collection zinc oxide by induced draft fan (6), delivers to packaging facilities (13) pack by transfer equipment (14).
5. the equipment of zinc oxide production technique according to claim 5, is characterized in that: between described molten zinc room (2) is connected with condensing chamber (4), be connected with calcining furnace (3) and calcining furnace feed compartment (7); Transport pipe is connected with between molten zinc room (2) and packaging facilities (13), being communicated with of the entrance end of calcining furnace and molten zinc room, exit end are communicated with condensing chamber through calcining furnace feed compartment, calcining furnace feed compartment is provided with calcining furnace charging machine, it is indoor that the discharge port position of described calcining furnace charging machine is positioned at molten zinc, calcining furnace feed compartment by pipeline respectively with condensing chamber with receive powder room and be communicated with.
6. the equipment of zinc oxide production technique according to claim 5, is characterized in that: described oxidized still (1) is rotary kiln or rotary oven.
7. the equipment of zinc oxide production technique according to claim 6, is characterized in that: described calcining furnace (3) is rotary kiln or rotary oven.
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| CN105731522B (en) * | 2015-06-23 | 2017-05-24 | 河北金梆子锅炉有限公司 | Continuous feeding and output Wetherill furnace |
| CN109945644B (en) * | 2019-05-08 | 2023-10-27 | 扬州新达再生资源科技有限公司 | High density zinc oxide's processing stove |
| CN111285395A (en) * | 2020-02-25 | 2020-06-16 | 兴化市庆丰锌品有限公司 | Production process of high-purity zinc oxide indirect method |
| CN111204795A (en) * | 2020-02-25 | 2020-05-29 | 兴化市庆丰锌品有限公司 | Indirect zinc oxide self-heating production system |
| CN116944743B (en) * | 2023-08-16 | 2024-01-30 | 浙江振兴阿祥集团有限公司 | Self-adjusting supporting tool for welding spiral case ring seat of water turbine |
| CN117404905B (en) * | 2023-12-15 | 2024-04-09 | 江苏瑞材装备有限公司 | Zirconia ceramic powder calcines production line system |
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| JPH0791058B2 (en) * | 1987-11-13 | 1995-10-04 | 株式会社クボタ | Manufacturing method of zinc white |
| SG123635A1 (en) * | 2004-12-28 | 2006-07-26 | Nanoscience Innovation Pte Ltd | Nanostructured zinc oxide and a method of producing the same |
| CN100417753C (en) * | 2006-11-07 | 2008-09-10 | 北京矿冶研究总院 | Technology for preparing tetrapod-like zinc oxide whisker by normal pressure zinc vapour oxidation method |
| CN202988766U (en) * | 2012-10-17 | 2013-06-12 | 栾川县锌源矿冶有限公司 | Production equipment for spontaneous combustion environmental-friendly type zinc oxide |
| CN202912717U (en) * | 2012-10-17 | 2013-05-01 | 栾川县锌源矿冶有限公司 | Production and calcining equipment of pyrophoric environment friendly zinc oxide |
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Effective date of registration: 20170808 Address after: 471000, Huayang Industrial Agglomeration Area, Mengjin County, Henan City, Luoyang province (Baihe Village, Baihe Town) Patentee after: Dan Ke Luoyang zinc industry limited company Address before: Miaozi town of Luanchuan County in Henan province 471521 in Luoyang City Patentee before: Luanchuan County Xinyuan Mining and Metallurgy Co., Ltd. |