CN101293673A - Method for processing acid washing iron red with multilevel rotary kiln - Google Patents
Method for processing acid washing iron red with multilevel rotary kiln Download PDFInfo
- Publication number
- CN101293673A CN101293673A CNA2008100480855A CN200810048085A CN101293673A CN 101293673 A CN101293673 A CN 101293673A CN A2008100480855 A CNA2008100480855 A CN A2008100480855A CN 200810048085 A CN200810048085 A CN 200810048085A CN 101293673 A CN101293673 A CN 101293673A
- Authority
- CN
- China
- Prior art keywords
- rotary kiln
- high temperature
- red
- kiln
- acid washing
- 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
Images
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses a method for processing pickling iron red by using a multi-level rotary kiln, which belongs to the field of high-temperature heating and purifying. The invention causes the pickling iron red material to continuously pass through the multi-level rotary kiln and to continuously accept the heating treatments with the high temperature of 800 DEG C to 900 DEG C in the multi-level rotary kiln; therefore, a chloride in the iron red is boiled away and separated from the iron red and is repelled into an absorption tower to be recycled and processed by using induced draft covers of every level of the high-temperature rotary kiln; the iron red which has been dechlorinated after the continuous high-temperature treatment in the rotary kiln continuously comes into a cooling kiln at normal temperature from the last-level high-temperature rotary kiln and continuously produces the iron oxide red. The method relates to a continuous feeding and outputting mode with a fluent and smooth production process; the method effectively improves the removal efficiency of removing the chloride from the pickling iron red; the purified iron oxide red is directly applied to a subsequent production process, which meets the requirements of industrial production on the quantity and quality of the iron oxide red products; and the chlorine containing gas separated from the pickling iron red is recycled to meet the requirements of circular economy and environmental protection.
Description
Technical field
The present invention belongs to heat method of purification field with the method for processing acid washing iron red with multilevel rotary kiln.
Technical background
In the production process of TECHNIQUE TO LARGE INTEGRATED STEEL WORKS, the hydrochloride waste that all pickling that relates to steel produce all can prepare regenerator iron oxide, is commonly called as acid washing iron redly, and its quantity is quite huge.Red iron oxide then is a widely used important source material in the magnetic materials production industry.A shortcoming of this red iron oxide is to contain chlorion inevitably, when it reaches certain content, has promptly limited the application of red iron oxide.Maximally utilise this so-called waste material resource, must remove the remaining muriate in acid washing iron red, so from acid washing iron red, remove the key issue that remaining muriate is the qualified red iron oxide of preparation.
At present, the method for acid washing iron red purification has: water washing method and high-temperature heat treatment method.
The water washing method is divided in simple water washing method and the alkali again and washing method, simple water washing method is earlier red iron oxide to be mixed with a certain amount of water, stir, drainage again, in the alkali and washing method be earlier red iron oxide and water to be mixed, add alkali, as sodium hydroxide, calcium hydroxide etc. are to solution, to be weakly alkaline solution again and carry out the wash-out processing, WATER-WASHING METHOD not only produces a large amount of chlorine-contained wastewaters, and dechlorination poor effect, handle the oven dry of still need heating later and handle the processing that just can carry out the back operation, treating processes is numerous and diverse, and production efficiency is low, can not adapt to the demand of suitability for industrialized production.
The pyroprocessing method is that acid washing iron red raw material is joined rotary kiln, acid washing iron red raw material is 800-900 ℃ of processing of heating of process in rotary kiln, make muriate under the condition of high temperature, become the gaseous state volatilization, because the existing acid washing iron red raw material of high-temperature processing method stands heat treated in kiln path is limited, heat insufficient, only through the processing of once heating, muriate can not being gasified totally, it is clean to remove, still have the part chlorion to remain in the iron oxide red, so must repeat above-mentioned operation once more, carry out the heat treated second time, trivial operations again, both expended time in, expended the energy again.
Therefore, solution less energy-consumption from acid washing iron red, high-level efficiency prepare the method for qualified red iron oxide, become the major issue of paying close attention in the industry.
Summary of the invention
The purpose of this invention is to provide a kind of method of processing acid washing iron red with multilevel rotary kiln of using to solve the problem of less energy-consumption from acid washing iron red, the qualified red iron oxide of high-level efficiency preparation of industrialization.
Present method is to make acid washing iron red raw material continuously by multistage high temperature rotary kiln, this acid washing iron red high-temperature heating treatment of in multistage high temperature rotary kiln, passing through 800-900 ℃ continuously, make the muriate in acid washing iron red separated with iron oxide red by the heat vaporization, and the draught hood by high temperature rotary kilns at different levels is removed to the outer absorption tower recycling of high temperature rotary kiln, the iron oxide red of continuous high temperature processing dechlorination then enters the normal temperature cooling kiln continuously from the final stage high temperature rotary kiln in the rotary kiln, becomes the continuous output of qualified red iron oxide finished product.
According to the employed multilevel rotary kiln device of aforesaid method, comprise high temperature rotary kiln, the normal temperature cooling kiln, recovery tower and air draft pipe, described high temperature rotary kiln has opening for feed, discharge port and draught hood, the tapered reducing of its discharge port, the normal temperature cooling kiln has opening for feed and product outlet, the discharge port of prime high temperature rotary kiln is connected with the opening for feed of back level high temperature rotary kiln, the discharge port of final stage high temperature rotary kiln is connected with normal temperature cooling kiln opening for feed, become the inclination angle of 2-4 degree with the base water plane through the multilevel rotary kiln device of this serial connection, the draught hood of high temperature rotary kiln is communicated with air draft pipe, and the opening for feed of chopped-off head high temperature rotary kiln is communicated with the raw materials bucket.
High temperature rotary kiln of the present invention adopts the discharge port of taper reducing, through multistage high temperature rotary kiln serial connection, pass through continuously in the multistage high temperature rotary kiln of acid washing iron red raw material, the shock absorption of the discharge port of taper reducing, guarantee acid washing iron red sufficient heat-up time in high temperature rotary kiln, effectively improved acid washing iron red in muriatic removal efficient, existing method need be through the repetition operation of twice circular heating, finish continuously by our rule is disposable, processing cost reduces by 2/3rds than existing methods; The cl content of the red iron oxide of handling by present method is reduced to 0.196% by the cl content 1.74% before handling, and the chlorine clearance doubles abovely in the raw material, has significantly shortened the treatment time and has reduced energy consumption
Present method is continuously feeding and output mode, the production process smoothness, and the red iron oxide after the purification directly drops into the subsequent production operation, has satisfied the demand of industrialized production to red iron oxide product production and quality.Isolating chlorine-containing gas recycles from acid washing iron red, satisfies recycling economy and environmental protection requirement.
Description of drawings
Fig. 1 is by the two-stage rotary kiln device of the inventive method
Fig. 2 is by three grades of rotary kiln devices of the inventive method
Embodiment
Now the device accompanying drawing that uses in conjunction with the inventive method further specifies the present invention and how to implement
Example 1 two-stage rotary kiln is handled the method for the qualified red iron oxide of acid washing iron red preparation
The example method is to adopt the two-stage rotary kiln to handle the qualified red iron oxide of acid washing iron red preparation, and two high temperature rotary kilns and a normal temperature cooling kiln are connected in series successively from beginning to end, and the device that present method adopts as shown in Figure 1.One-level high temperature rotary kiln 1 and secondary high temperature rotary kiln 2 have opening for feed 1-1 and 2-1 respectively, the discharge port 1-2 and the 2-2 of taper reducing, draught hood 1-3 and 2-3, the discharge port 1-2 of one-level high temperature rotary kiln 1 is connected with the opening for feed 2-1 of secondary high temperature rotary kiln 2, the discharge port 2-2 of secondary high temperature rotary kiln 2 is connected with the opening for feed 4-1 of normal temperature cooling kiln 4, two-stage rotary kiln device through this serial connection is gesture for sleeping in, with the base water plane 2 inclination angles of spending are arranged, the draught hood 1-3 of two-stage high temperature rotary kiln and 2-3 are communicated with air draft pipe 6 respectively, the opening for feed 1-1 of one-level high temperature rotary kiln 1 is communicated with raw materials bucket 5, and the discharge port 4-2 of normal temperature cooling kiln 4 is product outlet
Acid washing iron red raw material is entered in the one-level high temperature rotary kiln 1 through one-level high temperature rotary kiln 1 opening for feed 1-1 from loading hopper 5, since this device be the small angle inclination gesture that crouches with ground, so acid washing iron red raw material is under action of gravity in kiln, slowly move from one-level high temperature rotary kiln 1 to secondary high temperature rotary kiln 2, and in kiln, stand 800-900 ℃ high-temperature heating treatment, because the shock absorption of one-level high temperature rotary kiln 1 discharge port 1-2 taper reducing, acid washing iron red raw material is very even to secondary high temperature rotary kiln 2 from high temperature rotary kiln 1, slowly move in an orderly manner, the high-temperature heating treatment vaporization that muriate in acid washing iron red stands the two-stage high temperature rotary kiln continuously separates with iron oxide red, and respectively by the draught hood 1-3 and the 2-3 of high temperature rotary kiln extract out separately, and drain into absorption tower 7 recycling outside the high temperature rotary kiln through gas exhaust duct 6, the iron oxide red of continuous high temperature processing dechlorination then enters normal temperature cooling kiln 4 internal cooling continuously from the outlet 2-2 of secondary high temperature rotary kiln 2 in rotary kiln, become qualified red iron oxide finished product, through the continuous output of the product outlet 4-2 of normal temperature cooling kiln 4.
In present method two-stage rotary kiln example, the length of one-level high temperature rotary kiln is 11 meters, and the two-stage high temperature rotary kiln is connected, and its total length is 22 meters, and with the lengthening kiln comparison of 22 meters of single-stages, expense of the present invention is saved more than 50%.By present method, from raw material enter high temperature rotary kiln to the finished product red iron oxide from the cooling kiln output, the entire treatment process needs 60～90 minutes, processing power reaches 30 ton per days.And prior art single-stage rotary kiln processing power only is 5～6 ton per days, its acid washing iron red finished product cl content is reduced to 1.02% by 1.74% before handling, reduced rate is 41.38%, the cl content of handling acid washing iron red finished product by the inventive method two-stage rotary kiln is reduced to 0.196% by 1.74% before handling, and reduced rate is 88.73%.
2 three grades of rotary kilns of example are handled the method for acid washing iron red recovery red iron oxide
The example method is to adopt three grades of rotary kilns to handle the qualified red iron oxide of acid washing iron red preparation, 9 meters of each high temperature rotary kilns, three high temperature rotary kilns are connected in series from beginning to end, the final stage rotary kiln is connected with a normal temperature cooling kiln again, three grades of rotary kiln devices through this serial connection are gesture for sleeping in, with the base water plane 3 inclination angles of spending are arranged, the device that present method adopts as shown in Figure 2.Specific implementation method is referring to example 1, obvious processing effect.
Claims (3)
1, method with processing acid washing iron red with multilevel rotary kiln, be to make acid washing iron red raw material continuously by multistage high temperature rotary kiln, acid washing iron red high-temperature heating treatment of in multistage high temperature rotary kiln, passing through 800-900 ℃ continuously, muriate in acid washing iron red is separated with iron oxide red by the heat vaporization, and the draught hood by high temperature rotary kilns at different levels extracts the recycling of the absorption tower to the high temperature rotary kiln side by side, after the iron oxide red of continuous high temperature processing dechlorination then enters the cooling of normal temperature cooling kiln continuously from the final stage high temperature rotary kiln in rotary kiln, become the continuous output of qualified red iron oxide finished product.
2, multilevel rotary kiln device with the processing acid washing iron red with multilevel rotary kiln method according to claim 1, comprise high temperature rotary kiln, the normal temperature cooling kiln, recovery tower and air draft pipe, it is characterized in that high temperature rotary kiln has opening for feed, discharge port and draught hood, the normal temperature cooling kiln has opening for feed and product outlet, the discharge port of prime high temperature rotary kiln is connected with the opening for feed of back level high temperature rotary kiln, the discharge port of final stage high temperature rotary kiln is connected with normal temperature cooling kiln opening for feed, multilevel rotary kiln device through this serial connection is the gesture that crouches becomes the 2-4 degree with the base water plane inclination angle, the draught hood of high temperature rotary kilns at different levels is communicated with air draft pipe respectively, and the opening for feed of chopped-off head high temperature rotary kiln is communicated with the raw materials bucket.
3, multilevel rotary kiln device according to claim 2 is characterized in that the tapered reducing of high temperature rotary kiln discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100480855A CN101293673A (en) | 2008-06-19 | 2008-06-19 | Method for processing acid washing iron red with multilevel rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100480855A CN101293673A (en) | 2008-06-19 | 2008-06-19 | Method for processing acid washing iron red with multilevel rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101293673A true CN101293673A (en) | 2008-10-29 |
Family
ID=40064263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100480855A Pending CN101293673A (en) | 2008-06-19 | 2008-06-19 | Method for processing acid washing iron red with multilevel rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101293673A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603013A (en) * | 2012-03-20 | 2012-07-25 | 湖北全阳磁性材料制造有限公司 | Novel method for dechlorinating acid-washing iron oxide red |
| CN109052484A (en) * | 2018-10-25 | 2018-12-21 | 唐山学院 | Brown iron oxide dechlorination device and its control method |
| CN113943152A (en) * | 2021-09-06 | 2022-01-18 | 横店集团东磁股份有限公司 | Method for preparing permanent magnetic ferrite from high-chlorine iron oxide red and permanent magnetic ferrite |
-
2008
- 2008-06-19 CN CNA2008100480855A patent/CN101293673A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603013A (en) * | 2012-03-20 | 2012-07-25 | 湖北全阳磁性材料制造有限公司 | Novel method for dechlorinating acid-washing iron oxide red |
| CN109052484A (en) * | 2018-10-25 | 2018-12-21 | 唐山学院 | Brown iron oxide dechlorination device and its control method |
| CN109052484B (en) * | 2018-10-25 | 2024-02-23 | 唐山学院 | Iron oxide powder dechlorination device and control method thereof |
| CN113943152A (en) * | 2021-09-06 | 2022-01-18 | 横店集团东磁股份有限公司 | Method for preparing permanent magnetic ferrite from high-chlorine iron oxide red and permanent magnetic ferrite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203128593U (en) | Efficient blast furnace slag-washing water waste heat recycling system adopting INBA process | |
| CN108793244B (en) | Method for preparing titanium dioxide by metatitanic acid double-section rotary kiln calcination | |
| CN111876616A (en) | Stone coal navajoite oxidation, crystal breaking, roasting and vanadium extraction comprehensive utilization system | |
| CN103252207B (en) | Method for continuously preparing activated clay | |
| CN105084370A (en) | Slag slurry treatment method and treatment apparatus in high-pressure low-temperature hydrogenation process | |
| CN101293673A (en) | Method for processing acid washing iron red with multilevel rotary kiln | |
| CN104208890B (en) | Stripping system and gas stripping process | |
| CN212143878U (en) | System for treating waste photovoltaic cell panel by using plasma technology | |
| CN203128597U (en) | Efficient blast furnace slag-washing water waste heat recycling system adopting mintel process | |
| CN201729772U (en) | Limekiln for processing and recycling waste-gas | |
| CN216005680U (en) | Novel multi-stage energy-saving calcining furnace for industrial byproduct gypsum | |
| CN205973832U (en) | Dissolve out system that utilizes of exhaust steam among oxidation aluminium production | |
| CN202101561U (en) | Circulatory purification cooling system for electric smelting furnace | |
| CN201264910Y (en) | Apparatus for processing pickling iron-oxide red by using multi-stage rotary kiln | |
| CN210473593U (en) | Cement plant kiln tail flue gas cooling desulfurization increase system | |
| CN203291547U (en) | Steam stripping system | |
| CN202346788U (en) | Iron oxide slurry production system provided with high-temperature exhaust gas recovery device | |
| CN103058245B (en) | Equipment and technology of calcium oxide producing with calcium sulfate | |
| CN203443374U (en) | Pyrite ore acid making device blaster furnace slag waste heat recovery equipment | |
| CN207745671U (en) | A kind of limekiln exit gas purifying processing device | |
| CN202485019U (en) | Multifunctional boiler smoke processing device | |
| CN202576000U (en) | Hydrolysis system for urea process condensate | |
| RU102607U1 (en) | SYSTEM FOR THE PRODUCTION OF ALUMINUM CONCENTRATE FROM ASH AND SLAG WASTES OF POWER PLANTS | |
| CN111112301A (en) | System and method for treating waste photovoltaic cell panel by using plasma technology | |
| CN216946223U (en) | Production line for preparing sulfuric acid from desulfurized gypsum waste residues |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20081029 |