CN102674407A - Method for producing light magnesium oxide from high-magnesium-phosphorus tailings - Google Patents
Method for producing light magnesium oxide from high-magnesium-phosphorus tailings Download PDFInfo
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- CN102674407A CN102674407A CN2012101558266A CN201210155826A CN102674407A CN 102674407 A CN102674407 A CN 102674407A CN 2012101558266 A CN2012101558266 A CN 2012101558266A CN 201210155826 A CN201210155826 A CN 201210155826A CN 102674407 A CN102674407 A CN 102674407A
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Abstract
The invention discloses a method for producing light magnesium oxide from high-magnesium-phosphorus tailings, which comprises the following steps: calcining high-magnesium-phosphorus tailings which are used as a raw material, slaking, carbonizing, pyrolyzing, drying basic magnesium carbonate, and calcining the basic magnesium carbonate to obtain the light magnesium oxide. The invention can recycle the magnesium resource from the high-magnesium-phosphorus tailings, has the characteristics of low cost, simple technique and high product quality, and provides an effective way for utilizing industrial waste high-magnesium-phosphorus tailings.
Description
Technical field
The present invention relates to the compound of magnesium, especially a kind of method of utilizing discarded object height magnesium phosphorus mine tailing production light magnesium oxide.
Background technology
High magnesium phosphorus mine tailing is a Rock Phosphate (72Min BPL) through exploiting the sub product after obtaining the phosphorus concentrate through the beneficiation method enrichment after broken, and its staple is a calcium magnesium phosphorus, and its CaO content is 28%～42%, and MgO content is 15%～21%, P
2O
5Content is 4%～8.5%, belongs to high magnesium low-grade phosphorus ore.For the dressing-works of producing 3000000 tons of phosphorus concentrate per year, annually produce about 1,000,000 tons high magnesium phosphorus mine tailing, contain 190,000 tons the P of having an appointment
2O
5For a long time,, lack the approach that effectively utilizes, be used as waste by enterprise usually and adopt the mode of storing up to handle, not only take a large amount of land resourcess for this reason and build the mine tailing storehouse, also pollute surrounding enviroment, become a potential safety hazard point because this mine tailing is phosphorous lower.How effective this mine tailing that utilizes reclaim magnesium resource wherein, becomes a great problem that phosphorus ore selecting and purchasing industry needs to be resolved hurrily.
Light magnesium oxide is a kind of important inorganic chemical industry material; Be widely used in the weighting agent and the strengthening agent of rubber, plastics, paint, paper production; Softening agent and siliconized plate top coat as pottery, glass reinforced plastic also can be used as tackiness agent, reserving agent, catalyzer and other carrier anticaking agent etc.The method of producing light magnesium oxide mainly contains bittern limestone-based process, bittern ammoniation process, bittern ammonium carbonate method and rhombspar carborization etc.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming and provide a kind of method of utilizing discarded object height magnesium phosphorus mine tailing to produce light magnesium oxide, this method to have that cost is low, technology simple, the characteristics of superior product quality.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is: a kind of method of utilizing high magnesium phosphorus mine tailing to produce light magnesium oxide may further comprise the steps:
(1) calcining: with high magnesium phosphorus mine tailing 850～1200 ℃ of down calcinings, burn till forge white;
(2) digestion: the said Bai Yushui that forges is mixed by weight 1:4～40, stirred 10～100 minutes down for 20～90 ℃, obtain Digestive system in temperature;
(3) carbonization: to make the Digestive system solid content be massfraction 2%～15% to make up water in said Digestive system; In Digestive system, feeding the gas contain carbonic acid gas again carries out carburizing reagent and obtains carbodiimide solution under 10～35 ℃; Reduce to 6.5～8.0 o'clock stopped reaction in the pH of carbodiimide solution value; Carbodiimide solution is filtered, and filtrating is heavy magnesium water, and filter cake is mainly lime carbonate;
(4) pyrolysis: said heavy magnesium water at 80～105 ℃ of following pyrolysis 0.2～3h, is obtained the basic carbonate magnesium precipitate, obtain the magnesium basic carbonate filter cake after the filtration, filtrate water is back to digestion, carbonation process;
(5) dry, calcining: said magnesium basic carbonate filter cake dries by the fire 0.5～5h down at 90～220 ℃ and obtains white magnesium basic carbonate, and this magnesium basic carbonate is calcining 0.5～5h under 450～900 ℃, obtains light magnesium oxide.
Above-mentioned a kind of method of utilizing high magnesium phosphorus mine tailing to produce light magnesium oxide, wherein said high magnesium phosphorus mine tailing is that phosphorus ore obtains the mineral that contain low-grade Vanadium Pentoxide in FLAKES that discharge behind the phosphorus concentrate of higher-grade Vanadium Pentoxide in FLAKES in ore dressing process, contains P
2O
5Be 2%～10%, MgO is 15%～21%, and CaO is 28%～42%.
Above-mentioned a kind of method of utilizing high magnesium phosphorus mine tailing to produce light magnesium oxide, the wherein said gas that contains carbonic acid gas is the gas of 20%～100% carbonic acid gas volume(tric)fraction, the dioxide gas that produces in the time of can being high magnesium phosphorus mine tailing calcining.
The present invention has following advantage:
1, the present invention is the raw material production light magnesium oxide with industrial waste object height magnesium phosphorus mine tailing, belongs to the processing and utilization category of waste, economizes on resources, and production cost is low, has widened the raw material range of producing light magnesium oxide.
2, technology is simple, is worthy to be popularized.The present invention is a raw material with high magnesium phosphorus mine tailing; Except that power consumption, need other industrial raw material to participate in producing hardly; And the magnesium recovery is high, and technology of the present invention can be applied to a large amount of processing of high magnesium phosphorus mine tailing, for the Rock Phosphate (72Min BPL) exploitation provides a kind of effective ways with the high magnesium phosphorus of ore dressing business processes mine tailing.
3, the light magnesium oxide of the present invention's production meets industrial light magnesium oxide relevant criterion, superior product quality.
4, production process of the present invention is pollution-free; Meet and clean manufacturing technique requirent; Not only solve the high magnesium phosphorus of raw material mine tailing land occupation resource, problem of environment pollution caused, also turned waste into wealth, produced the Industrial products of high added value, had good economic benefit and important environment protection significance.
Embodiment
For the ease of understanding the present invention, below examples of implementation set forth content of the present invention, content of the present invention is not limited only to following embodiment.
Embodiment 1
High magnesium phosphorus mine tailing chemical ingredients: P
2O
57.05%, MgO16.86%, CaO37.49%
Take by weighing tail magnesium phosphorus mine tailing 100g 980 ℃ of calcinings down, obtain forging white 61.4g.Forge white and 700g water and stirred 40 minutes down, obtain Digestive system at 80 ℃.In Digestive system, replenish 800g water, the gas that in Digestive system, feeds 35% carbonic acid gas volume(tric)fraction again carries out carburizing reagent and obtains carbodiimide solution under 20 ℃, reduce to 6.7 o'clock stopped reaction in the pH of carbodiimide solution value, and carbodiimide solution is filtered, and filtrating is heavy magnesium water.Said heavy magnesium water obtains the basic carbonate magnesium precipitate at 95 ℃ of following pyrolysis 0.5h, obtains the magnesium basic carbonate filter cake after the filtration.Said magnesium basic carbonate filter cake dries by the fire 3h down at 150 ℃ and obtains white magnesium basic carbonate, and this magnesium basic carbonate is calcined 3h down at 600 ℃, obtains the light magnesium oxide product.
Embodiment 2
High magnesium phosphorus mine tailing chemical ingredients: P
2O
56.00%, MgO18.25%, CaO36.81%
Take by weighing tail magnesium phosphorus mine tailing 100g 950 ℃ of down calcinings, obtain forging white 59.8g, forge and whitely stirred 30 minutes down at 80 ℃, obtain Digestive system with 500g water.In Digestive system, replenish 600g water, the gas that in Digestive system, feeds 30% carbonic acid gas volume(tric)fraction again carries out carburizing reagent and obtains carbodiimide solution under 25 ℃, reduce to 6.9 o'clock stopped reaction in the pH of carbodiimide solution value, and carbodiimide solution is filtered, and filtrating is heavy magnesium water.Said heavy magnesium water obtains the basic carbonate magnesium precipitate at 93 ℃ of following pyrolysis 0.8h, obtains the magnesium basic carbonate filter cake after the filtration.Said magnesium basic carbonate filter cake dries by the fire 2h down at 180 ℃ and obtains white magnesium basic carbonate, and this magnesium basic carbonate is calcined 3h down at 700 ℃, obtains the light magnesium oxide product.
Embodiment 3
High magnesium phosphorus mine tailing chemical ingredients: P
2O
56.36%, MgO18.59%, CaO37.01%
Take by weighing tail magnesium phosphorus mine tailing 100g 960 ℃ of down calcinings, obtain forging white 60.5g, forge and whitely stirred 30 minutes down at 85 ℃, obtain Digestive system with 430g water.In Digestive system, replenish 900g water, the gas that in Digestive system, feeds 27% carbonic acid gas volume(tric)fraction again carries out carburizing reagent and obtains carbodiimide solution under 30 ℃, reduce to 6.8 o'clock stopped reaction in the pH of carbodiimide solution value, and carbodiimide solution is filtered, and filtrating is heavy magnesium water.Said heavy magnesium water obtains the basic carbonate magnesium precipitate at 97 ℃ of following pyrolysis 0.5h, obtains the magnesium basic carbonate filter cake after the filtration.Said magnesium basic carbonate filter cake dries by the fire 4h down at 120 ℃ and obtains white magnesium basic carbonate, and this magnesium basic carbonate is calcined 4h down at 550 ℃, obtains the light magnesium oxide product.
Embodiment 4
High magnesium phosphorus mine tailing chemical ingredients: P
2O
59.84%, MgO15.03%, CaO41.79%
Take by weighing tail magnesium phosphorus mine tailing 100g 1200 ℃ of down calcinings, obtain forging white 65.3g, forge and whitely stirred 100 minutes down at 90 ℃, obtain Digestive system with 262g water.In Digestive system, replenish 110g water, the gas that in Digestive system, feeds 20% carbonic acid gas volume(tric)fraction again carries out carburizing reagent and obtains carbodiimide solution under 10 ℃, reduce to about 8.0 o'clock stopped reaction in the pH of carbodiimide solution value, and carbodiimide solution is filtered, and filtrating is heavy magnesium water.Said heavy magnesium water obtains the basic carbonate magnesium precipitate at 105 ℃ of following pyrolysis 0.2h, obtains the magnesium basic carbonate filter cake after the filtration.Said magnesium basic carbonate filter cake dries by the fire 0.5h down at 220 ℃ and obtains white magnesium basic carbonate, and this magnesium basic carbonate is calcined 0.5h down at 900 ℃, obtains the light magnesium oxide product.
Embodiment 5
High magnesium phosphorus mine tailing chemical ingredients: P
2O
52.15%, MgO20.93%, CaO28.16%
Take by weighing tail magnesium phosphorus mine tailing 100g 850 ℃ of down calcinings, obtain forging white 56.4g, forge and whitely stirred 10 minutes down at 20 ℃, obtain Digestive system with 2256g water.In Digestive system, replenish 508g water, the gas that in Digestive system, feeds 99% carbonic acid gas volume(tric)fraction again carries out carburizing reagent and obtains carbodiimide solution under 22 ℃, reduce to about 6.5 o'clock stopped reaction in the pH of carbodiimide solution value, and carbodiimide solution is filtered, and filtrating is heavy magnesium water.Said heavy magnesium water obtains the basic carbonate magnesium precipitate at 80 ℃ of following pyrolysis 3h, obtains the magnesium basic carbonate filter cake after the filtration.Said magnesium basic carbonate filter cake dries by the fire 5h down at 90 ℃ and obtains white magnesium basic carbonate, and this magnesium basic carbonate is calcined 5h down at 450 ℃, obtains the light magnesium oxide product.
Claims (3)
1. method of utilizing high magnesium phosphorus mine tailing to produce light magnesium oxide is characterized in that it is made up of following steps:
(1) calcining: with high magnesium phosphorus mine tailing 850～1200 ℃ of down calcinings, burn till forge white;
(2) digestion: the said Bai Yushui that forges is mixed by weight 1:4～40, stirred 10～100 minutes down for 20～90 ℃, obtain Digestive system in temperature;
(3) carbonization: to make the Digestive system solid content be massfraction 2%～15% to make up water in said Digestive system; In Digestive system, feeding the gas contain carbonic acid gas again carries out carburizing reagent and obtains carbodiimide solution under 10～35 ℃; Reduce to 6.5～8.0 o'clock stopped reaction in the pH of carbodiimide solution value; Carbodiimide solution is filtered, and filtrating is heavy magnesium water, and filter cake is mainly lime carbonate;
(4) pyrolysis: said heavy magnesium water at 80～105 ℃ of following pyrolysis 0.2～3h, is obtained the basic carbonate magnesium precipitate, obtain the magnesium basic carbonate filter cake after the filtration, filtrate water is back to digestion, carbonation process;
(5) dry, calcining: said magnesium basic carbonate filter cake dries by the fire 0.5～5h down at 90～220 ℃ and obtains white magnesium basic carbonate, and this magnesium basic carbonate is calcining 0.5～5h under 450～900 ℃, obtains light magnesium oxide.
2. the method for utilizing high magnesium phosphorus mine tailing to produce light magnesium oxide according to claim 1; It is characterized in that described high magnesium phosphorus mine tailing is that phosphorus ore obtains the mineral that contain low-grade Vanadium Pentoxide in FLAKES that discharge behind the phosphorus concentrate of higher-grade Vanadium Pentoxide in FLAKES in ore dressing process, contains P
2O
5Be 2%～10%, MgO is 15%～21%, and CaO is 28%～42%.
3. the method for utilizing high magnesium phosphorus mine tailing to produce light magnesium oxide according to claim 1; It is characterized in that the described gas that contains carbonic acid gas is the gas of 20%～100% carbonic acid gas volume(tric)fraction, the dioxide gas that produces in the time of can being the calcining of high magnesium phosphorus mine tailing.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104828793A (en) * | 2015-05-06 | 2015-08-12 | 贵州省化工研究院 | Method for extracting phosphor concentrate from phosphor tailings and co-producing magnesium-containing calcium carbonate |
| CN104860334A (en) * | 2015-05-06 | 2015-08-26 | 贵州省化工研究院 | Processing method for improving quality of medium and low grade phosphorus ore and recycling calcium magnesium |
| CN104860277A (en) * | 2015-05-06 | 2015-08-26 | 贵州省化工研究院 | Medium and low grade phosphorus ore magnesium removal treatment method |
| CN109354000A (en) * | 2018-10-09 | 2019-02-19 | 湖南化工职业技术学院（湖南工业高级技工学校） | A kind of method of High-Mg phosphate tailings enrichment co-production precipitated calcium carbonate and magnesium hydroxide |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080025892A1 (en) * | 2005-02-01 | 2008-01-31 | Roche Eric G | Process for the Production of Magnesium Oxide |
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2012
- 2012-05-20 CN CN2012101558266A patent/CN102674407A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080025892A1 (en) * | 2005-02-01 | 2008-01-31 | Roche Eric G | Process for the Production of Magnesium Oxide |
Non-Patent Citations (2)
| Title |
|---|
| 孔繁振: "磷矿浮选尾矿煅烧铵盐法综合回收镁、磷试验研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》, no. 3, 31 December 2009 (2009-12-31) * |
| 韩敏芳: "《非金属矿物材料制备与工艺》", 31 July 2004, article "白云石碳化法制备轻质碳酸镁" * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104828793A (en) * | 2015-05-06 | 2015-08-12 | 贵州省化工研究院 | Method for extracting phosphor concentrate from phosphor tailings and co-producing magnesium-containing calcium carbonate |
| CN104860334A (en) * | 2015-05-06 | 2015-08-26 | 贵州省化工研究院 | Processing method for improving quality of medium and low grade phosphorus ore and recycling calcium magnesium |
| CN104860277A (en) * | 2015-05-06 | 2015-08-26 | 贵州省化工研究院 | Medium and low grade phosphorus ore magnesium removal treatment method |
| CN109354000A (en) * | 2018-10-09 | 2019-02-19 | 湖南化工职业技术学院（湖南工业高级技工学校） | A kind of method of High-Mg phosphate tailings enrichment co-production precipitated calcium carbonate and magnesium hydroxide |
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Application publication date: 20120919 |