CN1847419A - Stepped sulfuric acid treatment and roasting process for decomposing Baotou RE ore concentrate - Google Patents
Stepped sulfuric acid treatment and roasting process for decomposing Baotou RE ore concentrate Download PDFInfo
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- CN1847419A CN1847419A CN 200510063032 CN200510063032A CN1847419A CN 1847419 A CN1847419 A CN 1847419A CN 200510063032 CN200510063032 CN 200510063032 CN 200510063032 A CN200510063032 A CN 200510063032A CN 1847419 A CN1847419 A CN 1847419A
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Abstract
The present invention belongs to the field of non-ferrous metallurgy technology, and is stepped roasting process for decomposing Baotou RE ore concentrate. The technological process includes the following steps: 1. mixing Baotou RE ore concentrate with concentrated sulfuric acid; 2. roasting at 100-320 deg.c for 1-7 hr and spraying water to cool produced gas; and 3. roasting at 600-850 deg.c for 1-4hr, absorbing partial harmful gas with 80-92% concentration sulfuric acid, returning the absorbed concentrated sulfuric acid, cooling gas with water from the second step, and transferring the roasted material to the next step. The present invention combines the low temperature roasting and the high temperature roasting, and has less water consumption, raised resource utilization rate and other advantages.
Description
One, technical field:
The invention belongs to nonferrous metallurgy technology, relate to the stepped sulfuric acid treatment and roasting process for decomposing Baotou RE ore concentrate method.
Two, background technology:
Existing processing method of decomposing rare earth ore concentrate has " vitriol oil High-Temperature Strengthening roasting decomposing Baotou rare earth ore concentrate " and " low-temperature bake decomposing Baotou rare earth ore concentrate ".
Pyroprocess adopts and add the vitriol oil in concentrate, mixes after the decomposition to Baotou rare earth ore concentrate is finished in high-temperature roasting, and the main technique of the high-temperature roasting of adopting is as follows at present:
In 1 ton of 50% rare earth ore concentrate, add 1.3～1.4 tons of vitriol oils more than 92%, behind the thorough mixing,, finish the roasting decomposition course of concentrate through 720～780 dynamic roastings 1.5～3 hours.This technology mainly contains following two big defectives: (1) maturing temperature height, form a large amount of high-temp waste gas, and wherein contain HF, SiF4, SO
3Deng mixed gas, needing big water gaging to be used for lowering the temperature and absorbing the average ton of waste gas concentrate needs water 10m
3, form second pollution of wastewater, and waste water formation mixing acid can't carry out acid recovery; (2) produce a large amount of emissive industrial waste residues, average ton rare earth ore concentrate produces 1 ton of radioactivity 〉=7 * 104Bq/Kg radioactivity wet slag.
Low temperature process adopts and add the vitriol oil in concentrate, mix after low-temperature bake is finished the decomposition to Baotou rare earth ore concentrate, as Chinese patent (patent No.: 98118153.8) main technique of disclosed low-temperature bake is as follows:
In 1 ton of 50% rare earth ore concentrate, add 1.1～1.4 tons of vitriol oils more than 92%, behind the thorough mixing,, finish the roasting decomposition course of concentrate through 180～300 ℃ of static intermittent type roastings 7～13 hours.Though this technology has solved the existing defective of pyroprocess preferably, because the adopting process temperature limitation can not can't form the serialization industrial production greater than 300 ℃, and the process time is long, and production efficiency is low, and labour intensity is big.
Three, summary of the invention
The technical problem that the present invention solves is: the technological advantage of having chosen low-temperature bake and high-temperature roasting, with Baotou rare earth ore concentrate sulfuric acid process sinter process be divided into two the step carry out, both reduced the generation of emissive industrial waste residue and tail gas waste water, reclaimed sulfuric acid unnecessary in the technological process again, and the technology continuity is strong, labour intensity is low, is fit to carry out suitability for industrialized production.
The present invention adopts following processing step:
(1) be that the packet header concentrate of 40-60% and the vitriol oil of 90-97% are 1 in proportion with content of rare earth: 1-1.4 mixes;
(2) mixed material is under 100-320 ℃ of condition roasting 1-7 hour, and the gas that produces during roasting carries out the cooling of water spray quinoline, and solid materials carries out high-temperature roasting;
(3) solid materials is under 600-850 ℃ of condition, roasting 1-4 hour, the part obnoxious flavour that produces absorbs with the vitriol oil of 80-92%, the vitriol oil that has absorbed obnoxious flavour changes above-mentioned (1) step over to, rest parts gas cools off once more with the water coolant in above-mentioned (2) step, and solid materials changes subsequent processing over to.
The present invention is in the same place the advantages of low-temperature bake and high-temperature roasting, with Baotou rare earth ore concentrate sulfuric acid process sinter process be divided into two the step carry out, emphasis solves the pollution problem of spray waste water, former three generations's acid system spray waste water is nitration mixture and is difficult to reclaim, be converted into reclaim(ed) sulfuric acid and fluoride waste is recycled respectively, both reduce the waste water control difficulty, improved resource utilization again, thoroughly solved the pollution problem of Baotou rare earth ore concentrate pre-treatment waste water.
The first step of the present invention is chosen low-temperature bake, has at first decomposed the fluorochemical in the ore deposit, has got rid of the fluorine element in the ore deposit, has created condition for further reclaiming pure sulfuric acid, and next makes mixes ore deposit pelletizingization and homogenization, lays a good foundation for the high temperature of concentrate decomposes fully.
Because technological temperature is low in the operation, the cooling water amount that is adopted only is 1/3 of three generations's acid system, and is circulated to high temperature cooling, totally produces wastewater flow rate and descends, and can effectively carry out the waste water advanced F-of removing and handle.
Second step was selected high-temperature roasting for use, only contained SO in the waste water
3 2-A kind of waste gas, flow is easy to the sulfuric acid absorption utilization less than a step high-temperature roasting, and water coolant is selected for use and is once sprayed postcooling water and can no longer increase the waste water generation.Owing to decompose fully at this operation concentrate, the then final waste residue that produces can correspondingly reduce.
Cover the industrial roasting test that Rare Earth Company is finished 400 tons of 50% rare earth ore concentrates at gold:
Consume the vitriol oil (〉=92%) 513 tons;
Ore deposit acid ratio: concentrate: sulfuric acid=1: 1.1～1.5;
Produce 587 tons of roasted ores;
Should consume 573 tons in sulfuric acid, 60 tons of this technology reclaim(ed) sulfuric acids by produce in the past.
Four, description of drawings
Accompanying drawing is the process flow sheet of invention;
Five, embodiment
Technology of the present invention is as follows:
(1) be that the packet header concentrate of 40-60% and the vitriol oil of 90-97% are 1 in proportion with content of rare earth: 1-1.4 mixes, and mixed material enters the low temperature kiln;
(2) in the low temperature kiln, be that roasting 1-7 hour, the gas that produces during roasting carried out the cooling of water spray quinoline under 100-320 ℃ the condition in temperature, solid materials enters the high-temperature roasting kiln;
(3) in the high-temperature roasting kiln, in temperature is under the 600-850 ℃ of condition, and roasting 1-4 hour, the part obnoxious flavour absorbed with the vitriol oil of 80-92%, the vitriol oil that has absorbed obnoxious flavour changes above-mentioned (1) step over to, and remainder gas cools off once more with the water coolant in (2) step; Solid materials changes subsequent processing over to.
Embodiment:
In 1 ton of 50% rare earth ore concentrate, add 1.1～1.4 tons of vitriol oils more than 92%, in mixing tank behind the thorough mixing, enter the low temperature kiln, through 180～300 ℃ of static intermittent type roastings 1.5～3 hours, decompose the fluorine-containing mineral part in the concentrate, and mixed mineral made ball fast, and carrying out the first step roasting, main component is SiF in the waste gas of this moment
4And HF, adopt the fluorine in cooling of three grades of film-falling absorption tower water sprays and the elimination tail gas; Change the nodularization concentrate after the first step roasting over to the high-temperature roasting kiln, 700～780 ℃ of dynamic roastings of carrying out 1～3 hour, finish the decomposition course of whole concentrate, the waste gas that produce this moment is the SO after sulfuric acid decomposes
3, select 80%～92% the vitriol oil for use, in the secondary packing tower, reclaim SO
3, sulfuric acid is back to use concentrate mixing process, and the tail gas after absorbing is selected for use once to spray water, cooling back exhaust emissions in three grades of film-falling absorption towers of second cover, spray water can partly utilize or discharge after reclaiming fluorine.
Claims (1)
1, stepped sulfuric acid treatment and roasting process for decomposing Baotou RE ore concentrate is characterized in that: adopt following processing step:
(1) be that the packet header concentrate of 40-60% and the vitriol oil of 90-97% are 1 in proportion with content of rare earth: 1-1.4 mixes;
(2) mixed material is under 100-320 ℃ of condition roasting 1-7 hour, and the gas that produces during roasting carries out water spray quinoline cooling and absorbing, and solid materials carries out high-temperature roasting;
(3) solid materials is under 600-850 ℃ of condition, roasting 1-4 hour, the part obnoxious flavour that produces absorbs with the vitriol oil of 80-92%, the vitriol oil that has absorbed obnoxious flavour changes above-mentioned (1) step over to, rest parts gas carries out cooling and absorbing once more with the water coolant in above-mentioned (2) step, and solid materials changes subsequent processing over to.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510063032 CN1847419A (en) | 2005-04-05 | 2005-04-05 | Stepped sulfuric acid treatment and roasting process for decomposing Baotou RE ore concentrate |
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| CN 200510063032 CN1847419A (en) | 2005-04-05 | 2005-04-05 | Stepped sulfuric acid treatment and roasting process for decomposing Baotou RE ore concentrate |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899565A (en) * | 2009-05-31 | 2010-12-01 | 天津科技大学 | Process for decomposing Baotou rare earth ore concentrate and treating tail gas by medium-temperature reinforced roasting method |
| CN102031363A (en) * | 2011-01-06 | 2011-04-27 | 中冶东方工程技术有限公司 | Multi-stage roasting method for rare earth ore concentrate and equipment thereof |
| CN102534269A (en) * | 2012-03-26 | 2012-07-04 | 乐山盛和稀土股份有限公司 | Method for comprehensively recycling various rare earth from rare earth materials containing fluorine |
| CN103638803A (en) * | 2013-12-19 | 2014-03-19 | 宜兴新威利成稀土有限公司 | Rare-earth waste gas treatment system |
| CN104561539A (en) * | 2015-02-16 | 2015-04-29 | 包头市锦园化工科技有限公司 | Energy-saving and high-efficiency rare earth ore concentrate sulfuric acid stepped roasting method |
| CN106756128A (en) * | 2016-12-10 | 2017-05-31 | 包头稀土研究院 | A kind of method that low acid consumption mixed rare earth concentrates concentrated sulfuric acid is decomposed |
| US20180216209A1 (en) * | 2015-09-29 | 2018-08-02 | Outotec (Finland) Oy | Process and apparatus for producing uranium or a rare earth element |
| CN109022838A (en) * | 2018-09-14 | 2018-12-18 | 包头稀土研究院 | The processing method of fluorine-containing rare-earth mineral particle |
| CN109988903A (en) * | 2019-05-21 | 2019-07-09 | 李梅 | A kind of method that concentrated sulfuric acid two-stage roasting decomposes high-grade mixed rare earth concentrates |
| CN111187905A (en) * | 2020-02-11 | 2020-05-22 | 包头稀土研究院 | Method for decomposing mineral containing rare earth phosphate |
| CN111235382A (en) * | 2020-02-18 | 2020-06-05 | 陕西德信祥能源科技有限公司 | Environment-friendly and energy-saving rare earth concentrate sectional roasting system and roasting method |
| CN111549216A (en) * | 2020-05-22 | 2020-08-18 | 包头稀土研究院 | Method for decomposing rare earth concentrate |
| CN115449624A (en) * | 2022-08-11 | 2022-12-09 | 甘肃稀土新材料股份有限公司 | Method for treating high-iron low-phosphorus rare earth ore |
-
2005
- 2005-04-05 CN CN 200510063032 patent/CN1847419A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899565A (en) * | 2009-05-31 | 2010-12-01 | 天津科技大学 | Process for decomposing Baotou rare earth ore concentrate and treating tail gas by medium-temperature reinforced roasting method |
| CN102031363A (en) * | 2011-01-06 | 2011-04-27 | 中冶东方工程技术有限公司 | Multi-stage roasting method for rare earth ore concentrate and equipment thereof |
| CN102534269A (en) * | 2012-03-26 | 2012-07-04 | 乐山盛和稀土股份有限公司 | Method for comprehensively recycling various rare earth from rare earth materials containing fluorine |
| CN103638803A (en) * | 2013-12-19 | 2014-03-19 | 宜兴新威利成稀土有限公司 | Rare-earth waste gas treatment system |
| CN103638803B (en) * | 2013-12-19 | 2015-07-15 | 宜兴新威利成稀土有限公司 | Rare-earth waste gas treatment system |
| CN104561539A (en) * | 2015-02-16 | 2015-04-29 | 包头市锦园化工科技有限公司 | Energy-saving and high-efficiency rare earth ore concentrate sulfuric acid stepped roasting method |
| US10894999B2 (en) * | 2015-09-29 | 2021-01-19 | Outotec (Finland) Oy | Process and apparatus for producing uranium or a rare earth element |
| US20180216209A1 (en) * | 2015-09-29 | 2018-08-02 | Outotec (Finland) Oy | Process and apparatus for producing uranium or a rare earth element |
| CN106756128A (en) * | 2016-12-10 | 2017-05-31 | 包头稀土研究院 | A kind of method that low acid consumption mixed rare earth concentrates concentrated sulfuric acid is decomposed |
| CN109022838A (en) * | 2018-09-14 | 2018-12-18 | 包头稀土研究院 | The processing method of fluorine-containing rare-earth mineral particle |
| CN109022838B (en) * | 2018-09-14 | 2020-03-06 | 包头稀土研究院 | Method for treating fluorine-containing rare earth mineral particles |
| CN109988903A (en) * | 2019-05-21 | 2019-07-09 | 李梅 | A kind of method that concentrated sulfuric acid two-stage roasting decomposes high-grade mixed rare earth concentrates |
| CN111187905A (en) * | 2020-02-11 | 2020-05-22 | 包头稀土研究院 | Method for decomposing mineral containing rare earth phosphate |
| CN111235382A (en) * | 2020-02-18 | 2020-06-05 | 陕西德信祥能源科技有限公司 | Environment-friendly and energy-saving rare earth concentrate sectional roasting system and roasting method |
| CN111549216A (en) * | 2020-05-22 | 2020-08-18 | 包头稀土研究院 | Method for decomposing rare earth concentrate |
| CN115449624A (en) * | 2022-08-11 | 2022-12-09 | 甘肃稀土新材料股份有限公司 | Method for treating high-iron low-phosphorus rare earth ore |
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