CN1030219A - Processing contains the method for trivalent chromium mud - Google Patents
Processing contains the method for trivalent chromium mud Download PDFInfo
- Publication number
- CN1030219A CN1030219A CN 87105027 CN87105027A CN1030219A CN 1030219 A CN1030219 A CN 1030219A CN 87105027 CN87105027 CN 87105027 CN 87105027 A CN87105027 A CN 87105027A CN 1030219 A CN1030219 A CN 1030219A
- Authority
- CN
- China
- Prior art keywords
- trivalent chromium
- mud
- sulfuric acid
- chromium mud
- throw out
- 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
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- Treatment Of Sludge (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of method of handling trivalent chromium mud, it is with the sulfuric acid medium solution, make trivalent chromium mud change into the method that vitriol (double salt) precipitation is separated out, its throw out can be used as cement hardener, acid is 1: 0.5～1.5 with the weight ratio of water in the solution, solution is 3: 2～5 with the weight ratio that adds trivalent chromium mud, and temperature of reaction is 60 ℃～130 ℃, 100 ℃～400 ℃ of drying precipitate temperature.
Description
The present invention relates to a kind of treatment process that contains trivalent chromium mud, belong to environmental technology field.
Handling high valence chrome (Cr
+ 6) waste liquid in, no matter be electroosmose process, or film evaporation method, ion exchange method, electrolytic process and chemical method etc. all exist the secondary environmental pollution problem.Especially electrolytic process and chemical method are high valence chrome (Cr
+ 6) become trivalent chromium (Cr
+ 3), only reduced toxic action.Trivalent chromium mud or burning or stack all fail to solve it once more to the pollution of environment.
Treatment process involved in the present invention proposes in order to eliminate chromic the pollution once more, and its resultant can be used as cement hardener.
The technical spirit of the inventive method is, in the solution of sulfuric acid medium, adds trivalent chromium mud, makes its dissolving and forms supersaturated solution, and chromium in the mud and iron ion generate insoluble vitriol (double salt)-chromium sulphate Cr
2(So
4)
3With ferric sulfate Fe
2(So
4)
3, be cooled to room temperature, treat that throw out is separated out to filter and, can be used as cement hardener with drying precipitate.
Narration the inventive method is handled the most preferred embodiment of trivalent chromium mud below.
1. the vitriol oil being blown slowly to add fills in the reactive tank of water, and the ratio of sulfuric acid and water remains on 1: 0.5～1.5 in the gained liquid.(if add dilute sulfuric acid solution, then should keep the last sulfuric acid medium solution that forms same as described above);
2. in above-mentioned hot acid solution, add and removed sand grains and the argillous trivalent chromium mud that contains, each conversion reaction, the weight ratio that its add-on is controlled at solution and mud is 3: 2～5;
3. temperature of reaction is controlled at 60 ℃～130 ℃, and constantly stirs, and accelerated reaction should be carried out.
4. reaction soln is cooled to room temperature, treats that its throw out all separates out, the throw out Lu is gone out, Lu liquid can be made recirculated water and use;
5. throw out oven dry or stir-fry are done, the Heating temperature that its oven dry or stir-fry are done is 100 ℃～400 ℃;
6. dry thing cross 4900 holes/centimetre
2Sieve, gains are vitriol (double salt), its component is chromium sulphate (Cr
2(So
4)
3) 17-45%, surplus is ferric sulfate (Fe
2(So
4)
3).
Throw out through super-dry and screening is good cement hardener.
The process of this processing trivalent chromium mud, whole process are not discharged a mud, do not smolder, and do not throw away a residue, and be simple and easy to do, solves more up hill and dale the chromium sludge water to the mankind's harm.
Claims (6)
1, a kind of treatment process that contains trivalent chromium mud is characterized in that utilizing the sulfuric acid medium solution, makes that trivalent chromium conversion becomes vitriol (double salt), i.e. chromium sulphate [Cr in the mud
2(So
4)
3] and ferric sulfate [Fe
2(SO
4)
3] method separated out of throw out;
2, method according to claim 1 is characterized in that the weight ratio of its sulfuric acid acid of sulfuric acid medium solution and water is 1: 0.5～1.5;
3, method according to claim 1 is characterized in that each conversion reaction, and the weight ratio of sulfuric acid medium solution and mud is 3: 2～5;
4, method according to claim 1 is characterized in that temperature of reaction is controlled at 60 °～130 ℃.
5, method according to claim 1, it is characterized in that the throw out oven dry or frying the Heating temperature of doing is 100 ℃～400 ℃.
6, according to claim 1,2,3,4,5 described methods, its throw out, promptly the component of vitriol (double salt) is chromium sulphate (Cr
2(So
4)
3) account for 17～45%, ferric sulfate (Fe
2(So
4)
3) surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105027 CN1030219A (en) | 1987-06-28 | 1987-06-28 | Processing contains the method for trivalent chromium mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105027 CN1030219A (en) | 1987-06-28 | 1987-06-28 | Processing contains the method for trivalent chromium mud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1030219A true CN1030219A (en) | 1989-01-11 |
Family
ID=4815116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87105027 Pending CN1030219A (en) | 1987-06-28 | 1987-06-28 | Processing contains the method for trivalent chromium mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030219A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303940A (en) * | 2011-08-22 | 2012-01-04 | 陕西科技大学 | Method for treating sludge containing trivalent chromium |
| CN110923477A (en) * | 2019-12-11 | 2020-03-27 | 中南大学 | Method for separating and recovering chromium in tanning chromium-containing sludge |
-
1987
- 1987-06-28 CN CN 87105027 patent/CN1030219A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303940A (en) * | 2011-08-22 | 2012-01-04 | 陕西科技大学 | Method for treating sludge containing trivalent chromium |
| CN102303940B (en) * | 2011-08-22 | 2013-06-05 | 陕西科技大学 | Method for treating sludge containing trivalent chromium |
| CN110923477A (en) * | 2019-12-11 | 2020-03-27 | 中南大学 | Method for separating and recovering chromium in tanning chromium-containing sludge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |