CN103539240A - Method for preparing rare-earth-waste-residue coagulant - Google Patents
Method for preparing rare-earth-waste-residue coagulant Download PDFInfo
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- CN103539240A CN103539240A CN201310047390.3A CN201310047390A CN103539240A CN 103539240 A CN103539240 A CN 103539240A CN 201310047390 A CN201310047390 A CN 201310047390A CN 103539240 A CN103539240 A CN 103539240A
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Abstract
The invention relates to a method for preparing a head-wrapped wet acid-method rare-earth-waste-residue coagulant for water treatment. The coagulant is mainly prepared through mixing head-wrapped wet acid-method rare-earth desulfurized waste residues and sodium hydroxide and reacting. The preparation of the coagulant belongs to solid waste utilization, the coagulation effect and flocculation performance of the coagulant are equivalent to those of an alkali-method rare-earth coagulant, however, the cost is reduced greatly; the effect on the removal of turbidity and chromaticity of biochemical effluent of coking is obviously better than those of other common coagulants. Thus, the coagulant is an expansion of rare-earth waste residues in the field of wastewater treatment.
Description
Technical field
The present invention relates to preparation method and the concrete steps of alkaline process rare earth waste coagulating agent for a kind of water treatment.
Background technology
More and more in the applied research of water treatment field at rare earth in recent years, as: in ZL 2,009 1 0142775.1 and ZL 2,011 1 0020432.5, disclose with rare earth ore concentrate and according to corresponding proportion, be mixed with rare earth coagulant for water treatment with hydrochloric acid and sodium hydroxide respectively.Due to its reacting weight of preparing middle-weight rare earths seldom, though reacted recrement is recycling, will be affected.Therefore,, although they have good coagulation effect, high cost of manufacture, is restricted its application.In the wet type acid system rare earth extractive process of packet header, in order to eliminate the impact of sulfate ion on follow-up rare-earth extractant, before extraction process, need to remove in advance sulfate ion by the barium salt precipitator method, thereby produced take barium sulfate be main (65%-75%), clay (20%-30%) is barium sulfate waste residue auxiliary and that contain a small amount of rare earth (3%-5%), its outlet is that farmland is with fertile or discarded.
Summary of the invention
Object of the present invention is providing the alkaline process rare earth waste that a kind of cost of manufacture is low, coagulation effect is good coagulating agent aspect water treatment, has promoted the recycle value of waste residue, has reduced waste sludge discharge amount.The present invention mainly provides the preparation method of alkaline process rare earth waste coagulating agent.Preparation scheme of the present invention is as follows: the barium sulfate waste residue producing in 1. above-mentioned Baotou rare earth being refined is eluriated, and dries in baking oven; 2. learnt from else's experience 1. barium sulfate waste residue after processing and sodium hydroxide with 1g:15mL(3 mol/L-5mol/L) proportional arrangement, pack in flask, allow the two fully mix, and at 100 ℃ of temperature boiling reaction 1h-3h; 3. the mother liquor after having reacted leaches, and filtrate is in order to next step use; 4. the mother liquor leaching is put into thermostat water bath, at 60 ℃ of-80 ℃ of temperature, add thermomaturation 2h-4h after gained transparent liquid be prepared alkaline process rare earth waste coagulating agent.
Embodiment
The present embodiment 1: 1. get 7 grams of rare earth wastes after oven dry, put it in flask and slowly add the sodium hydroxide solution 100ml(of 3mol/L is 12g containing sodium hydroxide); 2. at 100 ℃, 1h is heated in boiling; 3. the mother liquor vacuum suction filter after having reacted, filtrate is in order to follow-up concentrated; 4. filtrate is put into water-bath, at 60 ℃ of temperature, adds thermomaturation 2h, and made transparent liquid is gained coagulating agent; 5. take certain coking biochemical water outlet is water quality treatment, and recording turbidity is 182.1NTU, and pH5.5 gets its 1000ml and drops into prepared coagulating agent 4ml, carries out coagulation experiment, and the turbidity that records water outlet after precipitation is 3.2NTU, goes turbid rate to reach 98.2%.Embodiment 2: 1. get 7 grams of rare earths after oven dry, putting it into the sodium hydroxide solution 100ml(that slowly adds 4mol/L in flask is 16g containing sodium hydroxide); 2. at 100 ℃, 2h is heated in boiling; 3. the mother liquor vacuum suction filter after having reacted, filtrate is in order to follow-up concentrated; 4. filtrate is put into water-bath, at 70 ℃ of temperature, adds thermomaturation 2h, and made transparent liquid is gained coagulating agent; 5. take certain coking biochemical water outlet is water quality treatment, and recording turbidity is 176.5NTU, and pH5.5 gets its 1000ml and drops into prepared coagulating agent 4ml, carries out coagulation experiment, and the turbidity that records water outlet after precipitation is 2.7NTU, goes turbid rate to reach 98.5%.Embodiment 3: 1. get 7 grams of rare earths after oven dry, putting it into the sodium hydroxide solution 100ml(that slowly adds 5mol/L in flask is 20g containing sodium hydroxide); 2. at 100 ℃, 3h is heated in boiling; 3. the mother liquor vacuum suction filter after having reacted, filtrate is in order to follow-up concentrated; 4. filtrate is put into water-bath, at 80 ℃ of temperature, adds thermomaturation 3h, and made transparent liquid is gained coagulating agent; 5. take certain coking biochemical water outlet is water quality treatment, and recording turbidity is 187.3NTU, and pH5.5 gets its 1000ml and drops into prepared coagulating agent 4ml, carries out coagulation experiment, and the turbidity that records water outlet after precipitation is 1.9NTU, goes turbid rate to reach 99.0%.
Claims (1)
1. water treatment comprises the steps: 1. packet header wet type acid system rare earth waste to be eluriated and dried in baking oven by the preparation method of rare earth waste coagulating agent; 2. rare earth waste and the sodium hydroxide proportioning of 1. processing of learning from else's experience is 1g:15mL(3 mol/L-5mol/L), be respectively charged in flask and allow the two fully mix, boiling reaction 1h-3h at 100 ℃ of temperature; 3. the mother liquor after having reacted leaches, and filtrate is in order to next step use; 4. the mother liquor leaching is put into thermostat water bath, at 60 ℃ of-80 ℃ of temperature, add thermomaturation 1h-3h after gained transparent liquid be prepared rare earth waste coagulating agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310047390.3A CN103539240A (en) | 2013-02-06 | 2013-02-06 | Method for preparing rare-earth-waste-residue coagulant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310047390.3A CN103539240A (en) | 2013-02-06 | 2013-02-06 | Method for preparing rare-earth-waste-residue coagulant |
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| Publication Number | Publication Date |
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| CN103539240A true CN103539240A (en) | 2014-01-29 |
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| CN201310047390.3A Pending CN103539240A (en) | 2013-02-06 | 2013-02-06 | Method for preparing rare-earth-waste-residue coagulant |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7491333B1 (en) * | 2005-12-14 | 2009-02-17 | Cleanwater Technologies, Llc | Industrial waste water treatment process |
| CN101560003A (en) * | 2009-05-23 | 2009-10-21 | 内蒙古科技大学 | Rare earth coagulant for water treatment and preparation method thereof |
| CN102120635A (en) * | 2011-01-07 | 2011-07-13 | 内蒙古科技大学 | Preparation method of water treatment coagulant |
| CN102173491A (en) * | 2011-03-18 | 2011-09-07 | 福建省长汀金龙稀土有限公司 | Process for comprehensively utilizing rare-earth ore leaching waste liquid and calcining waste heat in rare earth production |
-
2013
- 2013-02-06 CN CN201310047390.3A patent/CN103539240A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7491333B1 (en) * | 2005-12-14 | 2009-02-17 | Cleanwater Technologies, Llc | Industrial waste water treatment process |
| CN101560003A (en) * | 2009-05-23 | 2009-10-21 | 内蒙古科技大学 | Rare earth coagulant for water treatment and preparation method thereof |
| CN102120635A (en) * | 2011-01-07 | 2011-07-13 | 内蒙古科技大学 | Preparation method of water treatment coagulant |
| CN102173491A (en) * | 2011-03-18 | 2011-09-07 | 福建省长汀金龙稀土有限公司 | Process for comprehensively utilizing rare-earth ore leaching waste liquid and calcining waste heat in rare earth production |
Non-Patent Citations (1)
| Title |
|---|
| 冯秀娟等: "稀土渣絮凝剂的制备及其在印染废水中的应用", 《中国给水排水》 * |
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Application publication date: 20140129 |