CN103589877A - Method for treating red ash - Google Patents
Method for treating red ash Download PDFInfo
- Publication number
- CN103589877A CN103589877A CN201310601256.3A CN201310601256A CN103589877A CN 103589877 A CN103589877 A CN 103589877A CN 201310601256 A CN201310601256 A CN 201310601256A CN 103589877 A CN103589877 A CN 103589877A
- Authority
- CN
- China
- Prior art keywords
- red ash
- kiln
- ash
- red
- kiln hood
- 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.)
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to a method for treating red ash. The method comprises the step of directly spraying red ash obtained from the tail part of a kiln into the head part of the kiln. The method has the benefits that the red ash can be directly sprayed into the kiln instead of being sprayed into the kiln after being transported to a batch plant for batching, so that the defect of environment pollution and material loss in the traditional red ash treatment process are thoroughly avoided.
Description
Technical field
The present invention relates to a kind of method of processing red ash.
Background technology
At present both at home and abroad in Rotary Kiln production process, at kiln tail dirt, fall and in storehouse, all can produce coarse grain fallout, a heavy grain fallout.Because the fallout temperature just having produced is high, be called red ash.
Because the red ash great majority in settling bin are all that preheating zone produces in kiln, be the material that there is no volatilization, metal content is low, can not enter in product, and each factory returns to red ash to batching field batching again both at home and abroad.The general following methods that adopts:
1, red ash is sent into cooling drum with scrapper conveyor and is cooled to below 80 ℃, with car, transports to batching, in this process, due to handling, easily produces a large amount of airborne dusts, contaminate environment, loss material.
2, red ash is directly sent in agitation vat with scrapper conveyor, stir after pulping is extracted into pressure filter or clarifying tank drainage with pump and transport to again batching, in this process, because ash temperature is at 700 ℃ of left and right and water quick cooling, produced a large amount of steam and airborne dust, thereby polluted the environment, water loss is larger, metal loss amount in ash increases, and handling, transportation cost increase.
3, red ash from dirt fall storehouse emit allow its naturally cooling or spray water cooling, then transport to batching, in this process, because airborne dust environmental pollution is quite serious, metal loss amount in ash increases, and scald accident also easily occurs.
Therefore, how effectively to process red ash and become the technical problem of needing solution badly.
Summary of the invention
The object of this invention is to provide a kind of method of processing red ash, can avoid contaminate environment and reduce material loss.
The technical solution used in the present invention is a kind of method of processing red ash, and the method comprises the following steps: the red ash obtaining from kiln tail is directly injected in kiln hood.
In the present invention, when contriver utilizes the same batch of ore deposit containing zinc oxide of smelting in rotary kiln, a kind ofly do not spray into red ash and smelt, the another kind of kiln hood at rotary kiln directly sprays into red ash and smelts, after smelting finishes, after testing, the content that does not spray into zinc oxide in the product that the smelting of red ash obtains is 40%, spraying into the red grey content of smelting zinc oxide in the product obtaining is 44%, illustrates and sprays into the raising that red ash is conducive to quality product.
In the present invention, contriver tests the amount that sprays into red ash per hour, research shows: at the straying quatity that sprays into red ash to kiln hood with per hour while being controlled at more than 3.6 tons, can cause in kiln insufficient to material burning, the consumption that mixes oxygen increases, reduce temperature of charge in kiln, thereby can not effectively make the metal ingredient of red ash evaporate.Therefore the straying quatity that, preferably sprays into red ash to described kiln hood carries out with per hour being controlled in 3 tons.Particularly preferred, the straying quatity that sprays into red ash to described kiln hood carries out with per hour being controlled in 2.6 tons.
Preferably, while spraying into red ash to described kiln hood, speed is even.Can effectively make the material apart from kiln hood 1～8m place in kiln be stirred well, kiln temperature is stable, and burning of coal also can be comparatively abundant, thereby can make the carbon content in material reduce, and allows valuable composition in material melt out, and is beneficial to final product quality raising.
Preferably, described red ash is sprayed into the equipment of kiln hood and adopt roots blower to carry out.
Beneficial effect of the present invention is:
(1) red ash is by directly spraying in kiln, after not needing to be transported to batching field again and preparing burden, reenters kiln, thereby thoroughly avoided the drawback of contaminate environment when the red ash of conventional process.
(2) because red ash directly sprays in kiln, do not need transportation, greatly to save the production cost of transportation and conveying people, and can also increase the processing power of kiln to ore, one bar kiln monthly can increase the treatment capacity of 1500 tons, also can save 750 tons, raw coal.
(3) because red ash directly sprays in kiln, can there is good tipping effect to siliceous higher material in kiln, system temperature is more stable, and the zinc oxide product quality that can make to smelt out improves 3%～4%.
(4) proportioning that can enter kiln material and coal reduces by 3%～5%, thereby makes often to bake the coal that one ton of ore can be allocated 30～50kg less into.
Embodiment
For making those skilled in the art understand in detail production technique of the present invention and technique effect, with concrete production instance, further introduce application of the present invention and technique effect below.
Embodiment mono-:
Being equipped with containing zinc weight percent, be in the rotary kiln of 0.7～0.9% kiln slag, within 24 hours, to spray into the amount of 4.5 tons of red ashes, by the red grey Direct Uniform obtaining from kiln tail be injected to kiln hood and participate in the common roasting of kiln slag, after 30 minutes, 70～100 ℃ of the increase in temperature at 10～24m place in kiln.After roasting in 24 hours completes, after testing, in the kiln slag of discharge, contain the weight percent of zinc between 0.7～0.9%.
Embodiment bis-:
In being equipped with the rotary kiln of zinc oxide ore, with the amount of 2.6 tons per hour, by the red grey Direct Uniform obtaining from kiln tail be injected to kiln hood and participate in the common roasting of zinc oxide ore, after roasting completes, after testing, in product, the content of zinc oxide is 44%.Compare and do not add red ash to carry out roasting, in product, the content of zinc oxide has improved 4%.Through trimestral continuous production, the amount of processing zinc oxide ore has increased by 20%, and output has increased by 30%, and production cost has also obtained significantly declining.
Finally it should be noted that, above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to above-described embodiment, those skilled in the art are to be understood that, still can modify or be equal to replacement the present invention, and not departing from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in claim scope of the present invention.
Claims (5)
1. process a method for red ash, it is characterized in that: the method comprises the following steps: the red ash obtaining from kiln tail is directly injected in kiln hood.
2. a kind of method of processing red ash according to claim 1, is characterized in that: the straying quatity that sprays into red ash to described kiln hood carries out with per hour being controlled in 3 tons.
3. a kind of method of processing red ash according to claim 1, is characterized in that: the straying quatity that sprays into red ash to described kiln hood carries out with per hour being controlled in 2.6 tons.
4. according to a kind of method of processing red ash described in any one in claim 1-3, it is characterized in that: while spraying into red ash to described kiln hood, speed is even.
5. a kind of method of processing red ash according to claim 4, is characterized in that: described red ash is sprayed into the equipment of kiln hood and adopts roots blower to carry out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310601256.3A CN103589877A (en) | 2013-11-25 | 2013-11-25 | Method for treating red ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310601256.3A CN103589877A (en) | 2013-11-25 | 2013-11-25 | Method for treating red ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103589877A true CN103589877A (en) | 2014-02-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310601256.3A Pending CN103589877A (en) | 2013-11-25 | 2013-11-25 | Method for treating red ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103589877A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003201524A (en) * | 2002-01-10 | 2003-07-18 | Taiheiyo Cement Corp | Waste treatment method |
| CN101713615A (en) * | 2009-12-09 | 2010-05-26 | 中国铝业股份有限公司 | Chamotte kiln two-end feeding method |
-
2013
- 2013-11-25 CN CN201310601256.3A patent/CN103589877A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003201524A (en) * | 2002-01-10 | 2003-07-18 | Taiheiyo Cement Corp | Waste treatment method |
| CN101713615A (en) * | 2009-12-09 | 2010-05-26 | 中国铝业股份有限公司 | Chamotte kiln two-end feeding method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140219 |