CN105174310B - A kind of process utilizing industry chromium-bearing sludge to produce chrome green - Google Patents
A kind of process utilizing industry chromium-bearing sludge to produce chrome green Download PDFInfo
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- CN105174310B CN105174310B CN201510564126.6A CN201510564126A CN105174310B CN 105174310 B CN105174310 B CN 105174310B CN 201510564126 A CN201510564126 A CN 201510564126A CN 105174310 B CN105174310 B CN 105174310B
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- chrome green
- chromium
- bearing sludge
- kiln
- pushed bat
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/02—Oxides or hydrates thereof
Abstract
The invention discloses a kind of process utilizing industry chromium-bearing sludge to produce chrome green, put industry chromium-bearing sludge into baking room and be dried；With disintegrating machine, dried block mud is ground into little particle；Little particle after pulverizing is sent into pushed bat kiln after loading high-temperature resistant container, after high-temperature calcination, sends out pushed bat kiln, obtain chrome green crude product after cooling zone cooling；Kiln discharge product chrome green crude product is sent into hermetic type crusher in crushing and becomes little particle, send into air-flow vortex micronizer through conveyer belt again to pulverize, remove iron through belt magnetic separator de-ironing for the first time, and be simultaneously fed into dry powder vertical permanent magnetic deironing device and carry out removing further iron, therefore the finished product that gained chrome green is ultrafine higher degree.The finished product that the present invention draws contains minimal amount of copper aluminium zinc etc. and non-flammable impurity, and depending on the content of chromium-bearing sludge, finished product purity is up to about 90%, even more high.Sampling packaging of can weighing after detecting, the ferromagnet absorbed is byproduct.
Description
Technical field
The invention belongs to chemical industry processing method field, be specifically related to a kind of utilization industry chromium-bearing sludge and produce three oxidations
The process of two chromium.
Background technology
Electroplate Factory at home at present, the processing method for chromate waste water is substantially all employing following two side
Method: one is chemical precipitation method, two is resin column filtration method.But both approaches all existing defects, the first
Chemical method precipitates waste residue, needs to take substantial amounts of soil for depositing, and through acid-rain corrosion with after rinsing,
Also can cause environmental pollution；Its two be filtered by resin column after, in cleaned filter produce waste liquid, though
So can be used for reclaiming sodium dichromate, but in removal process, also have secondary pollution.Therefore critically important one
Point is the process problem of chromium hydroxide waste residue after chromate waste water is processed.Domestic at present also reported relevant hydroxide
The process technique of chromium waste residue, but these techniques are seldom used, and its main cause is complex process, is processed into
This height, value of the product are low, and application range of products majority is served only for the mixing material of cement processed, so being difficult to push away
Wide use.
Content of the invention
Goal of the invention: in order to solve the deficiencies in the prior art, the invention provides a kind of utilization industry dirty containing chromium
Mud produces the process of chrome green.
Technical scheme: a kind of process utilizing industry chromium-bearing sludge to produce chrome green, including as follows
Step:
(1) it, is dried: put industry chromium-bearing sludge into baking room and be dried；
(2) pulverize: with disintegrating machine, dried block mud is ground into little particle；
(3) high-temperature calcination: the little particle after pulverizing is sent into pushed bat kiln after loading high-temperature resistant container, through 1000
DEG C～1300 DEG C of high-temperature calcinations after, from cooling zone cooling after send out pushed bat kiln, obtain chrome green crude product；
Entering pushed bat kiln to going out the pushed bat kiln time from little particle is 20h；
(4), pulverize except iron, draw finished product: kiln discharge product chrome green crude product is sent into hermetic type and crushes
Crusher machine becomes little particle, then pulverizes through conveyer belt feeding air-flow vortex micronizer, removes through belt
Iron machine removes for the first time iron, and is simultaneously fed into dry powder vertical permanent magnetic deironing device and carries out removing further iron, described dry powder
Vertical permanent magnetic deironing device has ferrochrome automatic separation, and described air-flow vortex micronizer has automatic sorting
The function of particle mesh number, therefore the finished product that gained chrome green is ultrafine higher degree.
As optimization further: in described drying steps, chromium-bearing sludge is mainly composed of chromium hydroxide.
As optimization further: in described high-temperature calcinations step, the disposal side of flashing back of the toxic harmful exhaust gas of generation
Method is as follows: by the toxic harmful exhaust gas calcining generation in pushed bat kiln air-introduced machine pumpback, and send into high-temp combustion
Dioxin and furans harmful substance, after the high-temperature calcination of more than 1000 DEG C, can all be decomposed, waste gas by room
Drenching method dedusting cooling, desulfurizer through mist again, activated carbon enters air after filtering, reaches the requirement of environmental protection.
As further optimize: described air-introduced machine pumpback particularly as follows: enter in kilneye at 1-2 rice at pushed bat kiln,
Open a window being slightly less than blower cover above kilneye, a blower cover be installed and be connected to air-introduced machine, passing through pipeline
Toxic harmful exhaust gas is pumped to several the high temperature resistant spray guns being arranged on pushed bat kiln high temperature combustors both sides, spray into
High temperature combustors carries out exhaust gas back-burning, Access Control valve in the kiln Outer Tube of spray gun, it is simple to regulation waste gas
Flow, reaches the purpose that waste gas is sufficiently burned.
As optimization further: in described high-temperature calcinations step, pushed bat kiln contains chromium have been loaded into needing firing
The high-temperature resistant container of mud be directly placed at heat resistant and wear resistant damage push pedal on, by hydraulic pressure enter trigger by push pedal by
Block pushes in kiln, the preheated band of product, high temperature combustors, enters kiln discharge after cooling zone cooling, completes whole
Sintering procedure.
As optimization further: in described air-flow vortex micronizer, airslide disintegrating mill and cyclone separator,
Deduster, air-introduced machine combination forms crushing system, pulverized material thickness can be made to separate, and granularity meets
Entering collecting bag, corase particles drops to disintegrating area and continues to pulverize, and product granularity is arbitrarily adjusted between 2-150 micron
Whole, the dry material being suitable for below Mohs' hardness nine grades is pulverized.
As optimization further: described dry powder vertical permanent magnetic deironing device is internal uses rare earth permanent-magnetic material to provide height
Strong magnetic field gradient, when dry material falls permanent magnetic pulley, the ferromagnetic material in material is adsorbed by cylinder,
When cylinder forwards to without magnetic region, under Gravitative Loads, dropping voluntarily in dress iron case, single-stage irony is removed
Rate is up to more than 95%.
Beneficial effect: the finished product that the present invention draws contains minimal amount of copper aluminium zinc etc. and non-flammable impurity, depending on containing
The content of chromium mud, finished product purity is up to about 90%, even more high.Sample packaging of can weighing after detecting, quilt
The ferromagnet absorbed is byproduct.
Described high temperature combustors can uninterruptedly be fired twenty four hours continuously, if without special circumstances typically all to year
Have a holiday or vacation eventually or stop kiln during overhaul of the equipments.Use clean energy resource natural gas be fuel, temperature typically 1300 DEG C with
Under, if high temperature combustors changes the material of higher refractoriness, kiln temperature will be higher.Temperature is by automatic temperature control system
Control, the high temperature combustors at kiln is arranged over thermocouple temperature measurement sensor, is connected to automatic temperature control system,
When temperature deviation, control system is automatically adjusted natural gas flow, reach to control the requirement of temperature.
In described air-flow vortex micronizer, pulverized material thickness can be made to separate, the entrance that granularity meets
Collecting bag, corase particles drops to disintegrating area and continues to pulverize, and product granularity arbitrarily adjusts between 2-150 micron,
The dry material being suitable for below Mohs' hardness nine grades is pulverized, the airtight pulverizing of whole system, and the few noise of dust is low,
Programme-control, easy and simple to handle.
Described dry powder vertical permanent magnetic deironing device is internal uses rare earth permanent-magnetic material to provide high-gradient intense magnetic field, works as dry powder
When permanent magnetic pulley fallen by material, the ferromagnetic material in material is adsorbed by cylinder, as cylinder forwards to without magnetic region
When, under Gravitative Loads, dropping voluntarily in dress iron case, single-stage irony clearance is up to more than 95%, permissible
Automatic iron removing works continuously, and treating capacity is big.Diameter of cylinder, length, upper lower interface all can on-site customization.Forever
The magnetic field intensity adjustable of magnetic-type magnet.
Brief description
Fig. 1 is the disposal schematic diagram that flashes back of toxic harmful exhaust gas in the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment
As it is shown in figure 1, a kind of process utilizing industry chromium-bearing sludge to produce chrome green, including as
Lower step:
(1) it, is dried: put industry chromium-bearing sludge into baking room and be dried；Chromium-bearing sludge is mainly composed of
Chromium hydroxide.
(2) pulverize: with disintegrating machine, dried block mud is ground into little particle；
(3) high-temperature calcination: the little particle after pulverizing is sent into pushed bat kiln after loading high-temperature resistant container, through 1000
DEG C～1300 DEG C of high-temperature calcinations after, from cooling zone cooling after send out pushed bat kiln, obtain chrome green crude product；
Entering pushed bat kiln to going out the pushed bat kiln time from little particle is 20h；Described high temperature combustors can twenty four hours continuously
Uninterruptedly fire, if typically all having a holiday or vacation to the end of the year without special circumstances or stopping kiln during overhaul of the equipments.Use cleaning energy
Source natural gas is fuel, and temperature is typically below 1300 DEG C, if high temperature combustors changes the material of higher refractoriness
Material, kiln temperature will be higher.Temperature is arranged over thermoelectricity by automatic temperature control system control, the high temperature combustors at kiln
Even temperature transducer, is connected to automatic temperature control system, when temperature deviation, is automatically adjusted sky by control system
Gas flow, reaches to control the requirement of temperature.
The method of disposal of flashing back of the toxic harmful exhaust gas producing is as follows: will calcine the poisonous and harmful of generation in pushed bat kiln
Waste gas air-introduced machine pumpback, and send into high temperature combustors after the high-temperature calcination of more than 1000 DEG C, two can be disliked
English and furans harmful substance are all decomposed, and waste gas drenches method dedusting cooling, desulfurizer, activated carbon through mist again
Enter air after filtration, reach the requirement of environmental protection.The heat energy of baking room is by original above pushed bat kiln cooling zone
Cooling louvre installs a blower cover additional, and couples with air-introduced machine, delivers to dry by waste heat through pipeline again control lock
Stove room, therefore baking room and temperature-controllable, general control is more than 40 degree.
Described air-introduced machine pumpback, particularly as follows: enter in kilneye at 1-2 rice at pushed bat kiln, opens one slightly above kilneye
Less than the window of blower cover, a blower cover is installed and is connected to air-introduced machine, by pipeline by toxic harmful exhaust gas
Pump to several the high temperature resistant spray guns being arranged on pushed bat kiln high temperature combustors both sides, spray into high temperature combustors and carry out
Exhaust gas back-burning, Access Control valve in the kiln Outer Tube of spray gun, it is simple to regulation exhaust gas flow, reach waste gas
The purpose being sufficiently burned.
In described high-temperature calcinations step, pushed bat kiln is the high-temperature resistant container having been loaded into needing the chromium-bearing sludge fired
It is directly placed in the push pedal that heat resistant and wear resistant damages, hydraulic pressure is entered trigger push pedal block-by-block is pushed in kiln, product
Preheated band, high temperature combustors, enter kiln discharge after cooling zone cooling, complete whole sintering procedure.
(4), pulverize except iron, draw finished product: kiln discharge product chrome green crude product is sent into hermetic type and crushes
Crusher machine becomes little particle, then pulverizes through conveyer belt feeding air-flow vortex micronizer, removes through belt
Iron machine removes for the first time iron, and is simultaneously fed into dry powder vertical permanent magnetic deironing device and carries out removing further iron, described dry powder
Vertical permanent magnetic deironing device has ferrochrome automatic separation, and described air-flow vortex micronizer has automatic sorting
The function of particle mesh number, therefore the finished product that gained chrome green is ultrafine higher degree.
In described air-flow vortex micronizer, airslide disintegrating mill and cyclone separator, deduster, air inducing unit
Close and form crushing system, pulverized material thickness can be made to separate, the entrance collecting bag that granularity meets, coarse grain
Son drops to disintegrating area and continues to pulverize, and product granularity arbitrarily adjusts between 2-150 micron, is suitable for Mohs' hardness
The dry material of less than nine grades is pulverized, the airtight pulverizing of whole system, and the few noise of dust is low, programme-control, behaviour
Make simplicity.
Described dry powder vertical permanent magnetic deironing device is internal uses rare earth permanent-magnetic material to provide high-gradient intense magnetic field, works as dry powder
When permanent magnetic pulley fallen by material, the ferromagnetic material in material is adsorbed by cylinder, as cylinder forwards to without magnetic region
When, under Gravitative Loads, dropping voluntarily in dress iron case, single-stage irony clearance is up to more than 95%, permissible
Automatic iron removing works continuously, and treating capacity is big.Diameter of cylinder, length, upper lower interface all can on-site customization.Forever
The magnetic field intensity adjustable of magnetic-type magnet.
The present invention is not limited to above-mentioned preferred forms, and anyone can show that under the enlightenment of the present invention other are each
The product of kind of form, no matter but in its shape or structure, make any change, every have same as the present application
Or akin technical scheme, all fall within protection scope of the present invention.
Claims (7)
1. one kind utilizes the process that industry chromium-bearing sludge produces chrome green, it is characterised in that: include
Following steps:
(1) it, is dried: put industry chromium-bearing sludge into baking room and be dried；
(2) pulverize: with disintegrating machine, dried block mud is ground into little particle；
(3) high-temperature calcination: the little particle after pulverizing is sent into pushed bat kiln after loading high-temperature resistant container, through 1000
DEG C～1300 DEG C of high-temperature calcinations after, from cooling zone cooling after send out pushed bat kiln, obtain chrome green crude product；
Entering pushed bat kiln to going out the pushed bat kiln time from little particle is 20h；
(4), pulverize except iron, draw finished product: kiln discharge product chrome green crude product is sent into hermetic type and crushes
Crusher machine becomes little particle, then pulverizes through conveyer belt feeding air-flow vortex micronizer, removes through belt
Iron machine removes for the first time iron, and is simultaneously fed into dry powder vertical permanent magnetic deironing device and carries out removing further iron, described dry powder
Vertical permanent magnetic deironing device has ferrochrome automatic separation, and described air-flow vortex micronizer has automatic sorting
The function of particle mesh number, therefore the finished product that gained chrome green is ultrafine higher degree.
2. the process utilizing industry chromium-bearing sludge to produce chrome green according to claim 1, its
It is characterised by: in described drying steps, chromium-bearing sludge is mainly composed of chromium hydroxide.
3. the process utilizing industry chromium-bearing sludge to produce chrome green according to claim 1, its
Being characterised by: in described high-temperature calcinations step, the method for disposal of flashing back of the toxic harmful exhaust gas of generation is as follows:
By the toxic harmful exhaust gas calcining generation in pushed bat kiln air-introduced machine pumpback, and send into high temperature combustors warp
After the high-temperature calcination of more than 1000 DEG C, dioxin and furans harmful substance all can be decomposed, waste gas warp again
Mist drenches method dedusting cooling, desulfurizer, and activated carbon enters air after filtering, reaches the requirement of environmental protection.
4. the process utilizing industry chromium-bearing sludge to produce chrome green according to claim 3, its
It is characterised by: described air-introduced machine pumpback is particularly as follows: enter in kilneye at 1-2 rice at pushed bat kiln, above kilneye
Open a window being slightly less than blower cover, a blower cover is installed and is connected to air-introduced machine, had poisonous by pipeline
Evil waste gas is pumped to several the high temperature resistant spray guns being arranged on pushed bat kiln high temperature combustors both sides, sprays into high-temp combustion
Room carries out exhaust gas back-burning, Access Control valve in the kiln Outer Tube of spray gun, it is simple to regulation exhaust gas flow, reaches
The purpose being sufficiently burned to waste gas.
5. the process utilizing industry chromium-bearing sludge to produce chrome green according to claim 1, its
Being characterised by: in described high-temperature calcinations step, pushed bat kiln is resistance to the chromium-bearing sludge having been loaded into needing firing
Elevated temperature vessel is directly placed in the push pedal that heat resistant and wear resistant damages, and is entered trigger by hydraulic pressure and push pedal block-by-block is pushed kiln
In, the preheated band of product, high temperature combustors, enter kiln discharge after cooling zone cooling, complete whole sintering procedure.
6. the process utilizing industry chromium-bearing sludge to produce chrome green according to claim 1, its
It is characterised by: in described air-flow vortex micronizer, airslide disintegrating mill and cyclone separator, deduster,
Air-introduced machine combination forms crushing system, and pulverized material thickness can be made to separate, and the entrance that granularity meets is collected
Bag, corase particles drops to disintegrating area and continues to pulverize, and product granularity arbitrarily adjusts between 2-150 micron, is suitable for
Dry material below Mohs' hardness nine grades is pulverized.
7. the process utilizing industry chromium-bearing sludge to produce chrome green according to claim 1, its
It is characterised by: described dry powder vertical permanent magnetic deironing device is internal uses rare earth permanent-magnetic material to provide high-gradient intense magnetic field,
When dry material falls permanent magnetic pulley, the ferromagnetic material in material is adsorbed by cylinder, as cylinder forwards to
When without magnetic region, under Gravitative Loads, dropping voluntarily in dress iron case, single-stage irony clearance is up to more than 95%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510564126.6A CN105174310B (en) | 2015-09-01 | 2015-09-01 | A kind of process utilizing industry chromium-bearing sludge to produce chrome green |
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| CN201510564126.6A CN105174310B (en) | 2015-09-01 | 2015-09-01 | A kind of process utilizing industry chromium-bearing sludge to produce chrome green |
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| CN105174310B true CN105174310B (en) | 2016-11-09 |
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| CN107188228A (en) * | 2017-07-05 | 2017-09-22 | 东北大学 | The method that chromium-bearing sludge extracts chrome green |
| CN107902698B (en) * | 2017-12-20 | 2023-07-21 | 四川省银河化学股份有限公司 | Method for producing chromium oxide green by clean static continuous automatic calcination |
| CN110296577A (en) * | 2019-06-20 | 2019-10-01 | 四川省兴威钒业有限公司 | A kind of reduction chromium hydroxide water content flow and method |
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| CN1696064A (en) * | 2004-05-14 | 2005-11-16 | 高志远 | Method for producing chromic oxide by using sludge of containing chrome |
| WO2006098756A2 (en) * | 2004-08-16 | 2006-09-21 | The Board Of Trustees Of The University Of Arkansas | Synthetic control of metal oxide nanocrystal sizes and shapes |
| WO2007132028A1 (en) * | 2006-05-12 | 2007-11-22 | Fundacion Inasmet | Method for obtaining ceramic coatings and ceramic coatings obtained |
| CN104310733A (en) * | 2014-11-05 | 2015-01-28 | 北京泛博化学股份有限公司 | Method and device for recycling chromium-containing sludge |
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