CN104096794A - Hot reclaimation device for clay sand - Google Patents
Hot reclaimation device for clay sand Download PDFInfo
- Publication number
- CN104096794A CN104096794A CN201310119793.4A CN201310119793A CN104096794A CN 104096794 A CN104096794 A CN 104096794A CN 201310119793 A CN201310119793 A CN 201310119793A CN 104096794 A CN104096794 A CN 104096794A
- Authority
- CN
- China
- Prior art keywords
- sand
- calcining compartment
- clay
- chamber
- old
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The invention provides a hot reclaimation device for clay sand. The hot reclaimation device comprises, from top to bottom, a sand preheating chamber, a calcining chamber, an air heating chamber and a pre-cooling chamber. A combustor is arranged in the air heating chamber, so high temperature hot air with pressure can be provided; the bottom of the calcining chamber is provided with a plurality of nozzles communicated with the air heating chamber, and the high temperature hot air with pressure enters the calcining chamber, thereby allowing sand in the calcining chamber to be in a rising state. According to the invention, since reclaimation of used sand is realized through indirect combustion, heating temperature can be effectively controlled, and the used sand are not directly combusted, which enables the problem that overheat combustion may lead to adhesion of an alkaline compound on the surface of the sand to be overcome; and the reclaimed sand has a stable acid consumption value and can be applied to core preparation with a cold box.
Description
Technical field
The present invention relates to a kind of regenerating used machinery, particularly a kind of machinery that adopts indirect burning method to make regenerating used.
Background technology
At present, China is at cast used sand (clay-bonded sand) regeneration equipment and technical formation system, the efficient and strong complete set of equipments of adaptability of never having, more do not form intelligentized integrated system, cause reclaimed sand quality unstable, do not reach and stably replace fresh sand for cold core box process coremaking, make casting model powder system be difficult to form balanced recycle, thereby produce a large amount of antiquated sands, be discharged.
Existing clay sand old sand regeneration can not substitute fresh sand for cold-box process after reclaiming.Because traditional thermal reclamation sand is all by direct combustion method, cannot effectively control heating-up temperature, the material that causes impurity in old sand to form alkaline ceramic covers on the surface of sand, the material of this ceramic is difficult to whole removals through mechanically rubbing, cause the consumption acid number of reclaimed sand unstable, cannot be applied to cold-box process.
Summary of the invention
The invention provides a kind of clay-bonded sand thermal reclamation machine, by effective control hot blast temperature, indirect temperature, hot blast contacts with sand has avoided naked light directly to contact with sand, can solve the unsettled problem of consumption acid number of existence.
For achieving the above object, technical scheme provided by the invention is:
A kind of clay-bonded sand thermal reclamation machine, it is characterized in that: the hotair chamber that there is calcining compartment and be positioned at described calcining compartment below, described calcining compartment top is provided with and adds sand device, for old sand, enter in described calcining compartment, the indoor burner that is provided with of described air heat, high-temperature hot-air with pressure can be provided, described calcining compartment bottom is provided with the nozzle being communicated with described hotair chamber, for the described high-temperature hot-air with pressure, enter in described calcining compartment, the old sand in described calcining compartment is regenerated floating rising under state.
Described clay-bonded sand thermal reclamation machine, wherein: above described calcining compartment, be provided with sand preheating chamber, the swash plate that described sand preheating chamber is provided with sand inlet and is positioned at sand inlet below, described swash plate low level adds sand device described in connecting, in described sand preheating chamber, be also provided with a plurality of stringer boards, described a plurality of stringer board and described swash plate form the heat exchanger of old sand and hot blast, and the waste hot gas of discharging in described calcining compartment enters old sand in described sand preheating chamber and the heat exchanger of hot blast, carries out heat exchange with old sand.
Described clay-bonded sand thermal reclamation machine, wherein: the waste hot gas of discharging in described calcining compartment and old sand carry out after heat exchange, is communicated to again heat exchanger and the deduster of hot blast and cold wind.
Described clay-bonded sand thermal reclamation machine, wherein: below described hotair chamber, be provided with pre-chill room, in described pre-chill room, be provided with the dividing plate with a plurality of valves, the space of dividing plate below connects the air outlet of high pressure positive blower, the space of dividing plate top is provided with into sand port and sand export, described in enter sand port and by quicksand pipe, be communicated to top one side of described calcining compartment.
Described clay-bonded sand thermal reclamation machine, wherein: the space of described dividing plate top is also provided with exhaust outlet, and described exhaust outlet is communicated to heat exchanger and the described deduster of described hot blast and cold wind.
Described clay-bonded sand thermal reclamation machine, wherein: described sand export connects classification cooler and mechanically rubbing device.
Described clay-bonded sand thermal reclamation machine, wherein: in described calcining compartment, be provided with temperature sensor, described temperature sensor, add sand device and burner is all connected with a numerical control system.
The invention has the beneficial effects as follows: by indirect burning method, make regenerating used, can effectively control heating-up temperature, the impurity in old sand is easily removed when follow-up purified treatment, the consumption acid number of reclaimed sand is also stable, can be applicable to cold-box process.
In addition, old sand carries out heat exchange with the waste hot gas that calcining compartment is discharged in sand preheating chamber, can pass through preheating, can save the energy.
In addition, from sand out described calcining compartment, after described pre-chill room, connect again follow-up classification cooler, can reduce the live load of classification cooler.
Accompanying drawing explanation
Fig. 1 is the sectional structure chart of clay-bonded sand thermal reclamation machine provided by the invention.
Description of reference numerals: sand inlet 1; Add sand device 2; Sand export 3; Sand preheating chamber 4; Swash plate 41; Stringer board 42; Calcining compartment 5; Nozzle 51; Quicksand pipe 6; Hotair chamber 7; Burner 8; Pre-chill room 9; Dividing plate 91; Enter sand port 92; Exhaust outlet 93; Valve 10; High pressure positive blower 11; Deduster 12; The heat exchanger 13 of old sand and hot blast; The heat exchanger 14 of hot blast and cold wind.
The specific embodiment
As shown in Figure 1, clay-bonded sand thermal reclamation machine provided by the invention, sequentially comprises sand preheating chamber 4, calcining compartment 5, hotair chamber 7 and pre-chill room 9 from top to bottom, wherein:
In described hotair chamber 7, being provided with burner 8(can external blower fan), so that the high-temperature hot-air with pressure to be provided;
Described calcining compartment 5 bottoms are provided with a plurality of nozzles 5 that are communicated with described hotair chamber 7, the high-temperature hot-air with pressure producing are entered in described calcining compartment 5, so that the sand in described calcining compartment 5 is heated regeneration at the floating state of rising in described hotair chamber 7; The waste hot gas of discharging in described calcining compartment 5 can enter in deduster 12 by the heat exchanger 14 of hot blast and cold wind via described sand preheating chamber 4 again;
The swash plate 41 that described sand preheating chamber 4 is provided with sand inlet 1 and is positioned at sand inlet 1 below, described swash plate 41 low levels are connected with and add sand device 2, in described sand preheating chamber, be also provided with a plurality of stringer boards 42, described a plurality of stringer board 42 and described swash plate 41 form the heat exchanger 13 of old sands and hot blast, the old sand adding is along swash plate 41 landings, and under the control that quantitatively adds sand device 2, enters in described calcining compartment 5; Because the waste hot gas of discharging in described calcining compartment 5 can carry out heat exchange with old sand at the old sand of described sand preheating chamber 4 and the heat exchanger of hot blast 13, so can be preheated by the old sand of described sand preheating chamber 4.
In described pre-chill room 9, be provided with the dividing plate 9 with a plurality of valves 10, the space of dividing plate 9 belows connects the air outlet of high pressure positive blower 11, dividing plate 9 sides' space is provided with into sand port 92, sand export 3 and exhaust outlet 93, describedly enter sand port 92 and by quicksand pipe 6, be communicated to top one side of described calcining compartment 5, described sand export 3 can connect classification cooler and mechanically rubbing device (not giving diagram), and described exhaust outlet 93 is also communicated to heat exchanger 14 and the deduster 12 of described hot blast and cold wind.
Wherein: in described calcining compartment 5, be provided with temperature sensor (not giving diagram), described temperature sensor, add sand device 2 and burner 8 is all connected with a numerical control system (not giving diagram), by described numerical control system, accurately control the temperature of calcining compartment 5, reach best sand regeneration effect.
In the time of work of the present invention, old sand is through described sand preheating chamber 4, calcining compartment 5 hot blast out and the old sand of preparing thermal reclamation are carried out to exchange heat, old sand is conventionally at 15-40 ° of C, through exchange heat, old sand can be warmed up to 300 ° of C, has so just saved the required thermal energy consumption of old sand calcining intensification, reaches energy-saving effect.Old sand after preheating enters described calcining compartment 5 through the sand device 2 that quantitatively adds that adopts stepless frequency modulation to control, in calcining compartment 5, by having the hot blast of pressure and sand to form, floatingly rise fluidised form and transfer heat to sand grains, at high temperature the impurity such as the organic matter adhering to of (conventionally at 815 ° of C) sand grains, inorganic matter, active bentonite burns, decomposes and heats, for follow-up mechanical scrub sand is prepared.Sand grains itself also at high temperature carries out crystal structure restructuring, can obtain more stable thermal deformation coefficient, reaches the more accurate effect of core size.Hot-blast Heating old sand is core technology of the present invention, also be non-direct combustion method, sand is not directly to contact with combustion flame, but contact with hot blast, can guarantee like this temperature of sand heating controlled, the sinter that the overheated burning of sand can produce impurity covers sand surface, is very difficult to remove and to affect the acid consumption value of sand unstable, and be to affect reclaimed sand for the principal element of cold core box core process.Described hotair chamber 7 adopts the supply of combustion of natural gas mode, natural gas and burning to use numerical control system to control addition, igniting and supervision fired state, and deliverability of gas is subject to the FEEDBACK CONTROL of the temperature sensor of calcining compartment 5.Hotair chamber 7 and calcining compartment 5 adopt metallic profiles structure and been provided with internal refractories furnace lining to manufacture, and realize the insulation of heat.Old sand through calcining enters pre-chill room 9 through described quicksand pipe 6, and sand is carried out to fluidised form heat exchange high temperature is dropped to middle temperature by air-cooled, enters afterwards classification cooler and mechanically rubbing device again, completes the temperature of clay-bonded sand reclaimed sand and the control of powder content.
From above-mentioned record, use the present invention, there is following beneficial effect:
● greening: equipment non-secondary pollution and non waste discharge thing, environment is not worked the mischief, take up an area little.
● environmental protection: regenerating used and recycling, reduced the wasting of resources, solved the difficult problem of environmental protection of casting waste discharge.
● reduce product cost: it is 250 yuan/ton that current Foundry Works fresh sand is purchased with antiquated sand discharge totle drilling cost.80 yuan/ton of the reclaimed sand direct costs that this device is produced, general motor cylinder casting factory can produce 81000 tons of reclaimed sands the whole year, 1,377 ten thousand yuan of the costs that alternative fresh sand is saved.Reclaimed sand is superior in fresh sand, also can bring and improve the quality of products, and reduces the benefit of other cost.
● economic benefit:
1) according to reclamation rate 75% after clay-bonded sand regeneration, calculate, 1,026 ten thousand tons of year recyclable recycling old sands, reduce 1,026 ten thousand tons of fresh sand use amounts, and according to the average 250 yuan of calculating of procurement price in the fresh sand per ton whole nation, a year foundry industry can be saved 2,500,000,000 yuan of fresh sand costs.
2) according to 15 tons of/hour disposal abilities, calculate, 10.8 ten thousand tons of every cover intelligence equipment year disposal abilities, the whole nation needs this equipment 126 covers, calculates 3,800,000,000 yuan, the newly-increased market of clay-bonded sand regeneration equipment after research and development according to the every cover 3,000 ten thousand of commodity price.
3), according to conventional equipment operation, per tour operating personnel 2 people, year 7200 hours running times, need 14400 man-hours of man-hour.Every cover intelligent regenerative equipment can be saved 14400 hours man-hours.
Above embodiment is only that the present invention will be described; but not the summary of being restricted property; those of ordinary skills are under the guidance of inventive concept of the present invention; can also make modification and replacement on a lot of conventional structures, these are revised with replacement and also should be considered to belong among protection scope of the present invention.
Claims (7)
1. a clay-bonded sand thermal reclamation machine, it is characterized in that: the hotair chamber that there is calcining compartment and be positioned at described calcining compartment below, described calcining compartment top is provided with and adds sand device, for old sand, enter in described calcining compartment, the indoor burner that is provided with of described air heat, high-temperature hot-air with pressure can be provided, described calcining compartment bottom is provided with the nozzle being communicated with described hotair chamber, for the described high-temperature hot-air with pressure, enter in described calcining compartment, the old sand in described calcining compartment is regenerated floating rising under state.
2. clay-bonded sand thermal reclamation machine according to claim 1, it is characterized in that: above described calcining compartment, be provided with sand preheating chamber, the swash plate that described sand preheating chamber is provided with sand inlet and is positioned at sand inlet below, described swash plate low level adds sand device described in connecting, in described sand preheating chamber, be also provided with a plurality of stringer boards, described a plurality of stringer board and described swash plate form the heat exchanger of old sand and hot blast, the waste hot gas of discharging in described calcining compartment enters old sand in described sand preheating chamber and the heat exchanger of hot blast, carries out heat exchange with old sand.
3. clay-bonded sand thermal reclamation machine according to claim 2, is characterized in that: the waste hot gas of discharging in described calcining compartment and old sand carry out after heat exchange, is communicated to again heat exchanger and the deduster of hot blast and cold wind.
4. clay-bonded sand thermal reclamation machine according to claim 3, it is characterized in that: below described hotair chamber, be provided with pre-chill room, in described pre-chill room, be provided with the dividing plate with a plurality of valves, the space of dividing plate below connects the air outlet of high pressure positive blower, the space of dividing plate top is provided with into sand port and sand export, described in enter sand port and by quicksand pipe, be communicated to top one side of described calcining compartment.
5. clay-bonded sand thermal reclamation machine according to claim 4, is characterized in that: the space of described dividing plate top is also provided with exhaust outlet, and described exhaust outlet is communicated to heat exchanger and the described deduster of described hot blast and cold wind.
6. clay-bonded sand thermal reclamation machine according to claim 4, is characterized in that: described sand export connects classification cooler and mechanically rubbing device.
7. clay-bonded sand thermal reclamation machine according to claim 1, is characterized in that: in described calcining compartment, be provided with temperature sensor, described temperature sensor, add sand device and burner is all connected with a numerical control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119793.4A CN104096794A (en) | 2013-04-08 | 2013-04-08 | Hot reclaimation device for clay sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119793.4A CN104096794A (en) | 2013-04-08 | 2013-04-08 | Hot reclaimation device for clay sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104096794A true CN104096794A (en) | 2014-10-15 |
Family
ID=51665559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310119793.4A Pending CN104096794A (en) | 2013-04-08 | 2013-04-08 | Hot reclaimation device for clay sand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104096794A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493079A (en) * | 2014-12-31 | 2015-04-08 | 天津宁康科技有限公司 | Direct-blowing boiling cooling bed |
| CN108176807A (en) * | 2018-02-24 | 2018-06-19 | 共享智能铸造产业创新中心有限公司 | Sand thermal reclamation equipment |
| CN108361722A (en) * | 2018-04-12 | 2018-08-03 | 江苏新凯跃机械设备有限公司 | A kind of incinerator for recycling roughing sand |
| CN109434014A (en) * | 2018-11-15 | 2019-03-08 | 重庆长江造型材料（集团）股份有限公司 | A kind of antiquated sand roasting system |
| CN109562440A (en) * | 2016-07-06 | 2019-04-02 | 法塔铝业责任有限公司 | Equipment for regeneration cast sand |
| CN112284147A (en) * | 2020-10-29 | 2021-01-29 | 重庆迅华环境技术有限公司 | High-temperature preheating type oxygen-enriched combustion energy-saving emission-reducing system of sand regenerating furnace for casting |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155802A (en) * | 1980-12-16 | 1985-10-02 | Cosworth Res & Dev Ltd | Reclaiming used foundry sand |
| US4549698A (en) * | 1982-02-05 | 1985-10-29 | Andrews Robert S L | Method of reclaiming foundry sand |
| US4978076A (en) * | 1990-03-28 | 1990-12-18 | Gmd Engineered Systems, Inc. | Method for separating hazardous substances in waste foundry sands |
| US5251684A (en) * | 1991-12-06 | 1993-10-12 | Gmd Engineered Systems, Inc. | Method for controlling the oxidation and calcination of waste foundry sands |
| US5279741A (en) * | 1990-03-20 | 1994-01-18 | Kuttner Gmbh & Co. Kg | Process for regenerating used foundry sand |
| US5289920A (en) * | 1990-05-10 | 1994-03-01 | Kgt Giessereitechnik Gmbh | Process for thermically recovering old sands obtained in casting plants and for treating the dusts obtained during circulation of the sand |
| EP0998999A1 (en) * | 1998-11-07 | 2000-05-10 | Timothy George Henson | Casting sand reclamation apparatus |
| CN201596748U (en) * | 2009-12-16 | 2010-10-06 | 于彦奇 | Hot-wind floating sand heater |
| CN101862808A (en) * | 2010-06-02 | 2010-10-20 | 无锡锡南铸造机械有限公司 | Waste molding sand or core sand regenerating equipment |
| CN201880848U (en) * | 2010-12-17 | 2011-06-29 | 重庆长江造型材料（集团）有限公司 | Pneumatic sand dividing device of hot regeneration roasting furnace for casting waste sand |
| CN201950155U (en) * | 2010-12-17 | 2011-08-31 | 重庆长江造型材料（集团）有限公司 | Feeding device for casting waste sand hot method regeneration roasting furnace |
| CN102914154A (en) * | 2012-09-25 | 2013-02-06 | 机械工业第四设计研究院 | Boiling fluidizing roasting furnace |
| CN203155937U (en) * | 2013-04-08 | 2013-08-28 | 于彦奇 | Clay sand hot-method reclaiming machine |
-
2013
- 2013-04-08 CN CN201310119793.4A patent/CN104096794A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155802A (en) * | 1980-12-16 | 1985-10-02 | Cosworth Res & Dev Ltd | Reclaiming used foundry sand |
| US4549698A (en) * | 1982-02-05 | 1985-10-29 | Andrews Robert S L | Method of reclaiming foundry sand |
| US5279741A (en) * | 1990-03-20 | 1994-01-18 | Kuttner Gmbh & Co. Kg | Process for regenerating used foundry sand |
| US4978076A (en) * | 1990-03-28 | 1990-12-18 | Gmd Engineered Systems, Inc. | Method for separating hazardous substances in waste foundry sands |
| US5289920A (en) * | 1990-05-10 | 1994-03-01 | Kgt Giessereitechnik Gmbh | Process for thermically recovering old sands obtained in casting plants and for treating the dusts obtained during circulation of the sand |
| US5251684A (en) * | 1991-12-06 | 1993-10-12 | Gmd Engineered Systems, Inc. | Method for controlling the oxidation and calcination of waste foundry sands |
| EP0998999A1 (en) * | 1998-11-07 | 2000-05-10 | Timothy George Henson | Casting sand reclamation apparatus |
| CN201596748U (en) * | 2009-12-16 | 2010-10-06 | 于彦奇 | Hot-wind floating sand heater |
| CN101862808A (en) * | 2010-06-02 | 2010-10-20 | 无锡锡南铸造机械有限公司 | Waste molding sand or core sand regenerating equipment |
| CN201880848U (en) * | 2010-12-17 | 2011-06-29 | 重庆长江造型材料（集团）有限公司 | Pneumatic sand dividing device of hot regeneration roasting furnace for casting waste sand |
| CN201950155U (en) * | 2010-12-17 | 2011-08-31 | 重庆长江造型材料（集团）有限公司 | Feeding device for casting waste sand hot method regeneration roasting furnace |
| CN102914154A (en) * | 2012-09-25 | 2013-02-06 | 机械工业第四设计研究院 | Boiling fluidizing roasting furnace |
| CN203155937U (en) * | 2013-04-08 | 2013-08-28 | 于彦奇 | Clay sand hot-method reclaiming machine |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493079A (en) * | 2014-12-31 | 2015-04-08 | 天津宁康科技有限公司 | Direct-blowing boiling cooling bed |
| CN109562440A (en) * | 2016-07-06 | 2019-04-02 | 法塔铝业责任有限公司 | Equipment for regeneration cast sand |
| CN109562440B (en) * | 2016-07-06 | 2020-11-27 | 法塔铝业责任有限公司 | Apparatus for reclaiming foundry sand |
| CN108176807A (en) * | 2018-02-24 | 2018-06-19 | 共享智能铸造产业创新中心有限公司 | Sand thermal reclamation equipment |
| CN108361722A (en) * | 2018-04-12 | 2018-08-03 | 江苏新凯跃机械设备有限公司 | A kind of incinerator for recycling roughing sand |
| CN109434014A (en) * | 2018-11-15 | 2019-03-08 | 重庆长江造型材料（集团）股份有限公司 | A kind of antiquated sand roasting system |
| CN109434014B (en) * | 2018-11-15 | 2023-11-07 | 重庆长江造型材料（集团）股份有限公司 | Waste sand roasting system |
| CN112284147A (en) * | 2020-10-29 | 2021-01-29 | 重庆迅华环境技术有限公司 | High-temperature preheating type oxygen-enriched combustion energy-saving emission-reducing system of sand regenerating furnace for casting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203155937U (en) | Clay sand hot-method reclaiming machine | |
| CN104096794A (en) | Hot reclaimation device for clay sand | |
| CN201969827U (en) | Production line for roasting regeneration of resin waste sand | |
| CN101857383B (en) | Beam limekiln | |
| CN104043772A (en) | Casting used sand thermal reclamation system | |
| CN102688982A (en) | Process for roasting waste sand into precoated sand material | |
| CN109654882A (en) | A method of recycling cast waste sand is utilized based on compound roasting apparatus | |
| CN104096823B (en) | The apparatus and method of the pneumatic desanding of foundry goods and sand regeneration | |
| CN108007223A (en) | Crawler type calcium carbide waste-heat recovery device and recovery method | |
| CN103170575B (en) | Complete equipment for complete regeneration of used clay sand | |
| CN104197365B (en) | High temperature sludge exhaust heat stepped recovery warm-up combustion-supporting air device | |
| CN205874232U (en) | Burning roof beam of gas -cooled | |
| CN205102592U (en) | Energy -conserving kiln | |
| CN104515402B (en) | A kind of residual-heat utilization method of sintering system and device | |
| CN201129936Y (en) | Solid body material heat-exchanging device | |
| CN103033062A (en) | Waste heat utilization device for gas shuttle kiln | |
| CN102788501A (en) | Energy-saving environment-friendly type high-temperature fluidized bed calcinator | |
| CN2605941Y (en) | Furnace for sintering cast resin sands for regeneration | |
| CN207105868U (en) | A kind of PCB energy-saving baking ovens | |
| CN203875275U (en) | Heating device of thermal reclamation process of used casting sand | |
| CN207016496U (en) | Alumina producer sintering machine Increasing Production and Energy Saving environment friendly system | |
| CN203068947U (en) | Cupola furnace waste heat rock wool plate curing furnace | |
| CN201355185Y (en) | Energy-saving kiln | |
| CN105923987B (en) | It is a kind of for producing the melting furnaces device with high-efficient energy-saving environment friendly of basaltic mineral wool | |
| CN200986400Y (en) | Residual heat recovery device for ceramic tile production chain kiln sharp quenching zone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141015 |
|
| RJ01 | Rejection of invention patent application after publication |