CN104250018A - High iron slag treatment process - Google Patents
High iron slag treatment process Download PDFInfo
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- CN104250018A CN104250018A CN201310260486.8A CN201310260486A CN104250018A CN 104250018 A CN104250018 A CN 104250018A CN 201310260486 A CN201310260486 A CN 201310260486A CN 104250018 A CN104250018 A CN 104250018A
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Abstract
The invention discloses a high iron slag treatment process which comprises step-by-step iron removal, mixed sediment treatment and solution treatment and other steps. According to the process, the aluminum ions loss in the process of iron removal by application of ammonium sulfate sintering process for fly ash treatment can be reduced, and no other impurity is introduced. The iron ion content in an aluminum sulfate solution with iron removed is less than 20mg / L, meets the requirements of alumina production; and in the process, the produced precipitate is easy to filter.
Description
Technical field
The present invention relates to a kind of high ferro residues processing technique, particularly relate to flyash and produce the iron dross removing treatment process produced in alumina process.
Background technology
At present, the utilization of China's flyash mainly concentrate on building, building materials, agricultural [etc. aspect, belonging to low value added utilizes, especially for aluminous fly-ash (alumina content is greater than 30%) kind of waste beyond doubt.The main method of process aluminous fly-ash has: limestone sintering process, pre-desiliconizing-soda-lime sintering process, sulfuric acid process, hydrochloric acid method and ammonium sulfate sintering process etc.But the equal Shortcomings of various method.Only have ammonium sulfate sintering process preparation process to be decrement process, the quantity of slag is little; Reaction system is weak acid system, and equipment is easier to solve, and is beneficial to industrialization.
Ammonium sulfate obtains Tai-Ace S 150, ferric sulfate and ferrous sulfate mixing grog with flyash is baking mixed, Tai-Ace S 150, ferric sulfate and ferrous sulfate mixing solutions is obtained after Clinker digestion, in order to obtain the lower ferrum sulfuricum oxydatum solutum of iron-holder, therefore deironing process must be carried out to dissolution fluid.Due to Fe
3+the pH value of hydrolysis and Al
3+the pH value of hydrolysis is comparatively close, therefore must have the loss of some aluminum ions in iron removal, in order to reduce aluminum ions loss, necessarily process this part iron dross removing.
Summary of the invention
In order to solve the problem, the invention provides a kind of high ferro residues processing technique, object makes to reduce aluminum ions loss in using sulfated ammonium sintering process treated coal ash iron removal.
For achieving the above object, the invention provides a kind of high ferro residues processing technique, after stepwise deironing, mixed sediment process and solution-treated, obtain alum liquor.
Stepwise deironing is the pH value by adding ammoniacal liquor adjusted stepwise leach liquor, makes iron ion content in final solution be less than 20mg/L; A deironing is ferriammonium sulfate for obtaining product, and the product that secondary deironing obtains is aluminium ammonium alum and ferriammonium sulfate mixture; One time deironing regulator solution pH value is 1.4-1.7; Secondary deironing regulator solution pH value is 2.5-3.0.
Mixed sediment process is that the monoammonium sulfate being 20%-50% by aluminium ammonium alum and ferriammonium sulfate mixture and concentration reacts, and temperature of reaction is 60-90 DEG C, and the reaction times is 0.5-1 hour.
Solution-treated is that reaction product is turned back to leaching operation.
The alum liquor iron level obtained is less than 20mg/L.
Advantageous effect of the present invention: make to reduce aluminum ions loss in using sulfated ammonium sintering process treated coal ash iron removal, and do not introduce other impurity.Iron from aluminium sulfate solution ion content after deironing is less than 20mg/L, meets the requirement of alumina producing; The throw out generated in the process is easy to filter.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
1, leach; 2, a deironing; 3, ferriammonium sulfate; 4, secondary deironing; 5, aluminium ammonium alum and ferriammonium sulfate; 6, ammonium bisulfate solution; 7, alum liquor.
Embodiment
below in conjunction with accompanying drawing, the invention will be further described.
Embodiment 1
The pH value of leach liquor is regulated by adding ammoniacal liquor, the pH value of a deironing is 1.4, the pH value of secondary deironing is 2.5, secondary iron dross removing and concentration are that 20% ammonium bisulfate solution reacts, temperature of reaction is 60 DEG C, reaction times is 0.5 hour, and after dissolving, solution turns back to leaching operation, and its result is as shown in table 1:
Table 1
。
Embodiment 2
The pH value of leach liquor is regulated by adding ammoniacal liquor, the pH value of a deironing is 1.5, the pH value of secondary deironing is 2.6, secondary iron dross removing and concentration are that 30% ammonium bisulfate solution reacts, temperature of reaction is 80 DEG C, reaction times is 1 hour, and after dissolving, solution turns back to leaching operation, and its result is as shown in table 2:
Table 2
。
Embodiment 3
The pH value of leach liquor is regulated by adding ammoniacal liquor, the pH value of a deironing is 1.6, the pH value of secondary deironing is 2.7, secondary iron dross removing and concentration are that 30% ammonium bisulfate solution reacts, temperature of reaction is 70 DEG C, reaction times is 1 hour, and after dissolving, solution turns back to leaching operation, and its result is as shown in table 3:
Table 3
。
Embodiment 4
The pH value of leach liquor is regulated by adding ammoniacal liquor, the pH value of a deironing is 1.7, the pH value of secondary deironing is 3.0, secondary iron dross removing and concentration are that 50% ammonium bisulfate solution reacts, temperature of reaction is 90 DEG C, reaction times is 1 hour, and after dissolving, solution turns back to leaching operation, and its result is as shown in table 4:
Table 4
。
Claims (5)
1. a high ferro residues processing technique, is characterized in that obtaining alum liquor after stepwise deironing, mixed sediment process and solution-treated.
2. a kind of high ferro residues processing technique according to claim 1, its feature is the pH value by adding ammoniacal liquor adjusted stepwise leach liquor at stepwise deironing, makes iron ion content in final solution be less than 20mg/L; A deironing is ferriammonium sulfate for obtaining product, and the product that secondary deironing obtains is aluminium ammonium alum and ferriammonium sulfate mixture; One time deironing regulator solution pH value is 1.4-1.7; Secondary deironing regulator solution pH value is 2.5-3.0.
3. a kind of high ferro residues processing technique according to claim 1, it is characterized in that mixed sediment process is that the monoammonium sulfate being 20%-50% by aluminium ammonium alum and ferriammonium sulfate mixture and concentration reacts, temperature of reaction is 60-90 DEG C, and the reaction times is 0.5-1 hour.
4. a kind of high ferro residues processing technique according to claim 1, is characterized in that solution-treated is that reaction product is turned back to leaching operation.
5. a kind of high ferro residues processing technique according to claim 1, is characterized in that obtained alum liquor iron level is less than 20mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310260486.8A CN104250018B (en) | 2013-06-27 | 2013-06-27 | A kind of high ferro residues processing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310260486.8A CN104250018B (en) | 2013-06-27 | 2013-06-27 | A kind of high ferro residues processing technique |
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| CN104250018A true CN104250018A (en) | 2014-12-31 |
| CN104250018B CN104250018B (en) | 2016-02-10 |
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| CN201310260486.8A Active CN104250018B (en) | 2013-06-27 | 2013-06-27 | A kind of high ferro residues processing technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939572A (en) * | 2019-12-11 | 2021-06-11 | 桂阳县皓钰新材料有限公司 | Process for treating iron slag of steel plant by tunnel kiln |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497455A (en) * | 2009-03-13 | 2009-08-05 | 李睿德 | Method for producing limestone powder and aluminium ammonium sulfate using heat-engine plant desulfurized gypsum and fly ash |
| CN102424391A (en) * | 2011-09-01 | 2012-04-25 | 东北大学 | Method for comprehensive utilization of aluminum-containing material |
| CN103086408A (en) * | 2013-01-24 | 2013-05-08 | 沈阳铝镁设计研究院有限公司 | Method for producing alumina by mixing and roasting flyash and ammonium sulfate |
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2013
- 2013-06-27 CN CN201310260486.8A patent/CN104250018B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497455A (en) * | 2009-03-13 | 2009-08-05 | 李睿德 | Method for producing limestone powder and aluminium ammonium sulfate using heat-engine plant desulfurized gypsum and fly ash |
| CN102424391A (en) * | 2011-09-01 | 2012-04-25 | 东北大学 | Method for comprehensive utilization of aluminum-containing material |
| CN103086408A (en) * | 2013-01-24 | 2013-05-08 | 沈阳铝镁设计研究院有限公司 | Method for producing alumina by mixing and roasting flyash and ammonium sulfate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939572A (en) * | 2019-12-11 | 2021-06-11 | 桂阳县皓钰新材料有限公司 | Process for treating iron slag of steel plant by tunnel kiln |
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| CN104250018B (en) | 2016-02-10 |
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