CN104071818A - Method for separating calcium, magnesium and phosphorus elements from phosphate tailings by adopting water leaching and ammonium leaching - Google Patents
Method for separating calcium, magnesium and phosphorus elements from phosphate tailings by adopting water leaching and ammonium leaching Download PDFInfo
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000011574 phosphorus Substances 0.000 title claims abstract description 41
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 41
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000011575 calcium Substances 0.000 title claims abstract description 20
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 20
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000011777 magnesium Substances 0.000 title claims abstract description 19
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 19
- 238000002386 leaching Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 title claims abstract description 7
- 229910019142 PO4 Inorganic materials 0.000 title claims description 5
- 239000010452 phosphate Substances 0.000 title claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 7
- 239000000706 filtrate Substances 0.000 claims abstract description 7
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 5
- 239000012141 concentrate Substances 0.000 claims abstract description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 7
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims 3
- 239000000920 calcium hydroxide Substances 0.000 claims 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
- 239000011707 mineral Substances 0.000 claims 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 abstract description 11
- 239000000347 magnesium hydroxide Substances 0.000 abstract description 11
- 229910001862 magnesium hydroxide Inorganic materials 0.000 abstract description 11
- 239000000047 product Substances 0.000 abstract description 8
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002367 phosphate rock Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 235000019270 ammonium chloride Nutrition 0.000 abstract description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 238000003837 high-temperature calcination Methods 0.000 abstract description 2
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 239000011268 mixed slurry Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 229910052586 apatite Inorganic materials 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000012796 inorganic flame retardant Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
- Removal Of Specific Substances (AREA)
Abstract
本发明提供一种采用水浸、铵浸分离磷尾矿中钙、镁、磷元素的方法，其操作步骤包括如下：磷尾矿高温煅烧后用水循环浸取，过滤除去水不溶物的浸取液通入二氧化碳析出沉淀并分离得到碳酸钙产品，除掉钙以后的氢氧化镁混合料浆中加入氯化铵并加热，过滤分离得磷精矿，滤液加入氨水析出氢氧化镁沉淀。本发明能够利用磷矿原矿选后剩余的尾矿，具有成本低、工艺简单、产品质量好的特点，为工业废弃物磷尾矿的利用提供了一条有效利用途径。The invention provides a method for separating calcium, magnesium and phosphorus elements in phosphorus tailings by water leaching and ammonium leaching. The operation steps include the following steps: leaching the phosphorus tailings with water after high-temperature calcination, and filtering to remove water-insoluble substances. The solution is passed through carbon dioxide to precipitate and separate to obtain calcium carbonate product. Add ammonium chloride to the magnesium hydroxide mixed slurry after calcium removal and heat it. Filter and separate to obtain phosphorus concentrate. Add ammonia water to the filtrate to precipitate magnesium hydroxide. The invention can utilize the remaining tailings after the phosphate rock raw ore is selected, has the characteristics of low cost, simple process and good product quality, and provides an effective utilization way for the utilization of industrial waste phosphorus tailings.
Description
本发明属于化工领域，是一种对废弃物磷尾矿中的钙、镁、磷三种元素进行有效分离并获得氢氧化镁、碳酸钙、磷矿的方法。 The invention belongs to the field of chemical industry and relates to a method for effectively separating calcium, magnesium and phosphorus in waste phosphorus tailings to obtain magnesium hydroxide, calcium carbonate and phosphate rock.
背景技术 Background technique
磷尾矿是对磷矿原矿进行浮选后排出的一种工业废弃物，即废渣。随着磷矿的开采量增大，尾矿的数量也惊人地增加（如每70万吨原矿经过入选后，产生20～30万吨磷尾矿）。 Phosphorus tailings is a kind of industrial waste discharged after flotation of raw phosphate ore, that is, waste residue. As the mining volume of phosphate rock increases, the amount of tailings also increases surprisingly (for example, 200,000 to 300,000 tons of phosphate tailings are produced for every 700,000 tons of raw ore after selection).
因为磷尾矿中P2O5含量低，镁、钙等有害杂质含量较高，利用价值很低，长期得不到有效处理的磷尾矿堆积如山，给环境造成了严重的污染，又是资源的一种浪费。 Because the content of P2O5 in phosphorus tailings is low, the content of harmful impurities such as magnesium and calcium is high, and the utilization value is very low. Phosphorus tailings that have not been effectively treated for a long time have piled up like mountains, causing serious pollution to the environment, and are a waste of resources. kind of waste.
同时，磷尾矿中含有丰富的镁，氧化镁含量高达18%左右，并含有一定量的五氧化二磷（含量5～9%），此外还含有钙、锰、锑、铜、铁、铝、氟等元素,是一种不可多得的富镁资源。对尾矿的综合利用，一方面可以变废为宝，可以回收镁、磷资源，另一方面可以减少三废排放，减少对环境的污染，同时避免尾矿堆积占用土地，对实现资源的二次利用及循环经济目标，具有重要的社会和经济意义。 At the same time, phosphorus tailings are rich in magnesium, the content of magnesium oxide is as high as about 18%, and a certain amount of phosphorus pentoxide (content 5-9%), in addition to calcium, manganese, antimony, copper, iron, aluminum , fluorine and other elements, is a rare magnesium-rich resources. The comprehensive utilization of tailings, on the one hand, can turn waste into treasure, and can recycle magnesium and phosphorus resources. On the other hand, it can reduce the discharge of three wastes and reduce environmental pollution. Utilization and circular economy goals have important social and economic significance.
氢氧化镁是一种具有广泛用途的化工产品，以其缓冲性大、活性大、吸附能力强、无毒无害等优点，用作环保领域工业含酸废水的中和剂、工矿企业和矿井排放物中重金属的脱除剂、排烟脱硫剂、土地酸雨处理和pH值调节剂。并且氢氧化镁由于热分解温度高，具有更好的抑烟、废水中和、脱硫等作用，逐步取代氢氧化铝和氧化锑等无机阻燃材料应用在耐火材料、陶瓷、高性能耐腐蚀涂料。 Magnesium hydroxide is a chemical product with a wide range of uses. It is used as a neutralizer for industrial acid-containing wastewater in the field of environmental protection, industrial and mining enterprises and mines due to its advantages such as large buffering capacity, high activity, strong adsorption capacity, and non-toxic and harmless. Heavy metal removal agent in emissions, flue gas desulfurization agent, land acid rain treatment and pH regulator. In addition, due to its high thermal decomposition temperature, magnesium hydroxide has better smoke suppression, wastewater neutralization, desulfurization, etc., and gradually replaces inorganic flame retardant materials such as aluminum hydroxide and antimony oxide and is used in refractory materials, ceramics, and high-performance corrosion-resistant coatings. .
氢氧化镁的制备，可以采用卤水、海水、白云石、菱镁矿等作为镁源，通过高温煅烧，并使用碱性物质进行化学沉淀，如氨沉淀、石灰沉淀、烧碱沉淀等制得产品，一般需消耗大量热能并依靠充足的镁源。 The preparation of magnesium hydroxide can use brine, seawater, dolomite, magnesite, etc. as magnesium sources, calcined at high temperature, and use alkaline substances for chemical precipitation, such as ammonia precipitation, lime precipitation, caustic soda precipitation, etc. to obtain products. Generally need to consume a lot of heat and rely on sufficient sources of magnesium.
对磷尾矿的利用，有采用煅烧、消化、碳化、热解等手段处理磷尾矿制成氧化镁『CN102674407A』；有采用高温煅烧磷尾矿，再加硅铁和萤石配料，最后还原得到金属镁『CN102534254A』；或磷尾矿在高温下煅烧、消化、碳化过滤，滤液加入氢氟酸，即得氟化镁和碳酸钙产品产品『CN102923739A』。以上皆属于需要高温高热的条件，能耗较大，成本高，并且往往仅能利用磷尾矿中的部分元素，不能实现磷尾矿中钙、镁、磷的综合利用，有必要开辟磷尾矿的新的综合利用途径。 For the utilization of phosphorus tailings, there are ways to process phosphorus tailings such as calcination, digestion, carbonization, and pyrolysis to make magnesium oxide "CN102674407A"; there is high-temperature calcination of phosphorus tailings, adding ferrosilicon and fluorite ingredients, and finally reducing Metal magnesium "CN102534254A" is obtained; or phosphorus tailings are calcined, digested, carbonized and filtered at high temperature, and hydrofluoric acid is added to the filtrate to obtain magnesium fluoride and calcium carbonate product "CN102923739A". All of the above are conditions that require high temperature and high heat, high energy consumption, high cost, and often only part of the elements in phosphorus tailings can be used, and the comprehensive utilization of calcium, magnesium, and phosphorus in phosphorus tailings cannot be realized. It is necessary to develop phosphorus tailings. A new way of comprehensive utilization of mines.
发明内容 Contents of the invention
本发明要解决磷尾矿的综合利用，特别是有效利用磷尾矿中的磷、镁、钙资源，生产高附加值的镁产品、钙产品，并获得磷精矿，该方法成本低、充分利用废弃资源及副产物、工艺简单的特点。 The present invention aims to solve the comprehensive utilization of phosphorus tailings, especially to effectively utilize phosphorus, magnesium and calcium resources in phosphorus tailings, produce high value-added magnesium products and calcium products, and obtain phosphorus concentrates. The method is low in cost and fully The use of waste resources and by-products and the characteristics of simple technology.
为了实现上述目地，本发明采取的技术方案为：一种采用水浸、铵浸分离磷尾矿中钙、镁、磷元素的方法，包括以下步骤： In order to achieve the above object, the technical solution adopted by the present invention is: a method for separating calcium, magnesium and phosphorus elements in phosphorus tailings by water leaching and ammonium leaching, comprising the following steps:
（1） 煅烧：磷尾矿在850～1100℃温度下煅烧，煅烧后磷尾矿中钙和镁分解为氧化钙和氧化镁，在此温度下磷灰石不分解。（2） 水浸：煅烧后的磷尾矿，用水循环浸取，过滤除去水不溶物。（3） 碳化：除掉水不溶物后的浸取液通入二氧化碳（尾矿煅烧阶段所产生），析出碳酸钙沉淀，分离得到碳酸钙产品，滤液返回水浸阶段循环使用。（4） 铵浸：除掉钙以后的氢氧化镁和磷矿混合料浆，加入氯化铵，加热煮沸蒸出氨气，至氢氧化镁完全溶解，过滤分离出剩余的不溶物即得磷精矿。蒸出的氨气循环使用。（5） 制氢氧化镁：分离出磷精矿后的滤液，加入铵浸阶段收集的氨水，析出氢氧化镁沉淀，过滤沉淀得到氢氧化镁，可以进一步烘干。滤液即为氯化铵，转入铵浸阶段循环使用。 (1) Calcination: Phosphorus tailings are calcined at a temperature of 850-1100°C. After calcination, calcium and magnesium in phosphorous tailings are decomposed into calcium oxide and magnesium oxide, and apatite does not decompose at this temperature. (2) Water leaching: The calcined phosphorus tailings are leached with water circulation, and the water insolubles are removed by filtration. (3) Carbonization: Carbon dioxide (produced in the tailings calcination stage) is introduced into the leaching solution after removing water-insoluble matter, and calcium carbonate precipitates are precipitated, and calcium carbonate products are separated, and the filtrate is returned to the water immersion stage for recycling. (4) Ammonium leaching: add ammonium chloride to the mixed slurry of magnesium hydroxide and phosphate rock after removing calcium, heat and boil to evaporate ammonia gas, until magnesium hydroxide is completely dissolved, filter and separate the remaining insoluble matter to obtain phosphorus concentrate. The steamed ammonia is recycled. (5) Manufacture of magnesium hydroxide: The filtrate after separating the phosphate concentrate is added to the ammonia water collected in the ammonium leaching stage to precipitate magnesium hydroxide, and the precipitate is filtered to obtain magnesium hydroxide, which can be further dried. The filtrate is ammonium chloride, which is transferred to the ammonium immersion stage for recycling. the
Claims (7)
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445300A (en) * | 2014-11-14 | 2015-03-25 | 黔南民族师范学院 | Method of preparing magnesium hydroxide and calcium carbonate and separating out phosphorus ores by taking phosphate tailings as raw materials through ammonia circulation process |
| 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 |
| CN105540560A (en) * | 2015-05-06 | 2016-05-04 | 贵州省化工研究院 | Technology for preparation of low-magnesium phosphate concentrate and byproducts calcium carbonate and magnesium oxide from medium and low grade phosphate rock |
| CN107697894A (en) * | 2017-09-29 | 2018-02-16 | 徐州市禾协肥业有限公司 | Improve phosphorus ore pyrolysis, leaching and method and the application of separative efficiency |
| CN108706991A (en) * | 2018-06-13 | 2018-10-26 | 贵阳开磷化肥有限公司 | A kind of method of phosphoric acid byproduct hydrogen ammonium in high-quality double superphosphate preparation process |
| CN109354050A (en) * | 2018-10-24 | 2019-02-19 | 沈阳辰兴化工技术有限公司 | A kind of method and device preparing calcium carbonate and magnesium hydroxide using dolomite |
| CN113149717A (en) * | 2021-02-23 | 2021-07-23 | 湖北省长江资源循环利用及装备创新中心有限公司 | Method for extracting phosphorus from flotation tailings |
| CN116332210A (en) * | 2023-04-03 | 2023-06-27 | 东北大学 | Method for extracting phosphorus from phosphate tailings step by step and comprehensively utilizing full components |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445300A (en) * | 2014-11-14 | 2015-03-25 | 黔南民族师范学院 | Method of preparing magnesium hydroxide and calcium carbonate and separating out phosphorus ores by taking phosphate tailings as raw materials through ammonia circulation process |
| 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 |
| CN105540560A (en) * | 2015-05-06 | 2016-05-04 | 贵州省化工研究院 | Technology for preparation of low-magnesium phosphate concentrate and byproducts calcium carbonate and magnesium oxide from medium and low grade phosphate rock |
| CN107697894A (en) * | 2017-09-29 | 2018-02-16 | 徐州市禾协肥业有限公司 | Improve phosphorus ore pyrolysis, leaching and method and the application of separative efficiency |
| CN108706991A (en) * | 2018-06-13 | 2018-10-26 | 贵阳开磷化肥有限公司 | A kind of method of phosphoric acid byproduct hydrogen ammonium in high-quality double superphosphate preparation process |
| CN109354050A (en) * | 2018-10-24 | 2019-02-19 | 沈阳辰兴化工技术有限公司 | A kind of method and device preparing calcium carbonate and magnesium hydroxide using dolomite |
| CN113149717A (en) * | 2021-02-23 | 2021-07-23 | 湖北省长江资源循环利用及装备创新中心有限公司 | Method for extracting phosphorus from flotation tailings |
| CN116332210A (en) * | 2023-04-03 | 2023-06-27 | 东北大学 | Method for extracting phosphorus from phosphate tailings step by step and comprehensively utilizing full components |
| CN116332210B (en) * | 2023-04-03 | 2024-04-12 | 东北大学 | Method for extracting phosphorus from phosphate tailings step by step and comprehensively utilizing full components |
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