TWI392652B - Method for extracting vanadium from an vanadium/phosphorus containing iron - Google Patents
Method for extracting vanadium from an vanadium/phosphorus containing iron Download PDFInfo
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本發明係關於一種含釩磷鐵提釩之方法，特別是關於一種可簡化該提釩製程並降低製程中釩之損失者。The present invention relates to a method for extracting vanadium from vanadium, phosphorus and iron, and more particularly to a method for simplifying the vanadium extraction process and reducing the loss of vanadium in the process.
在工程材料中，釩之應用相當廣泛，在一般煉鋼程序中，釩除了具有起脫氧及脫氟的功用，也可提升該鋼材的強度、硬度及延展性，因此，近年來業界對於釩之重視與日俱增，並紛紛投入提高該釩之回收率的研究。In engineering materials, the application of vanadium is quite extensive. In general steelmaking procedures, vanadium can improve the strength, hardness and ductility of the steel in addition to its function of deoxidation and defluorination. Paying attention to the increasing number of companies, and investing in research to improve the recovery rate of vanadium.
常見的含釩磷鐵中，係包含重量百分比為24至27%之磷、5至9%之釩、3至5%之鉻、1至1.5%之鎳、0.2至0.5%之矽及50至55%之鐵，此類磷鐵因價格低廉，且可透過一般焙燒傾出方式提煉出高含量的釩，使該含釩磷鐵具高經濟利用性，但含釩磷鐵之磷含量過高，且在提釩製程中難以一般化學方式單獨去除，導致提釩效率只達50%，甚至更低，因此除磷成為該提釩製程之首要重點。Common vanadium-containing ferrophosphorus contains 24 to 27% by weight of phosphorus, 5 to 9% of vanadium, 3 to 5% of chromium, 1 to 1.5% of nickel, 0.2 to 0.5% of rhodium and 50 to 55% iron, such phosphorus iron is low in price, and can extract high content of vanadium through general roasting and pouring, so that the vanadium-containing phosphorus iron has high economical utilization, but the phosphorus content of vanadium-containing phosphorus iron is too high. In the vanadium extraction process, it is difficult to remove the chemical method alone, resulting in a vanadium extraction efficiency of only 50% or even lower. Therefore, phosphorus removal is the primary focus of the vanadium extraction process.
一般而言，習用含釩磷鐵提釩方法係將含釩磷鐵於含氧環境下氧化後，再與碳酸鈉進行反應，因此習用之含釩磷鐵提釩方法，會先將含釩磷鐵在600至800℃高溫下進行4至6小時之氧化焙燒，之後再加入碳酸鈉進行2至3小時的焙燒，經過高溫焙燒後，含釩磷鐵中之釩可轉化為一釩酸鈉，該釩酸鈉為一水溶性鹽類，因此只需透過簡單加水傾出程序，便可將含釩磷鐵中的釩，以釩酸根離子的型態傾出於水中，得一傾出液，最後，再透過胺鹽沉釩或酸浸沉釩的方式，將釩酸根離子轉化為五氧化二釩，做進一步利用。但在此焙燒過程中，含釩磷鐵中的磷也會隨之轉化為一磷酸鈉，該磷酸鈉也為一水溶性鹽類，所以該含釩磷鐵中的磷也會隨之大量出現於傾出液中，使該傾出液變成一含磷之混合溶液，需透過大量除磷劑的添加將混合溶液中之磷去除，造成該提煉過程的困擾。In general, the vanadium-containing phosphorus iron extraction method is a method in which vanadium-containing ferrophosphorus is oxidized in an oxygen-containing environment and then reacted with sodium carbonate. Therefore, the vanadium-containing phosphorus-iron extraction method will firstly contain vanadium-containing phosphorus. The iron is oxidized and calcined at a high temperature of 600 to 800 ° C for 4 to 6 hours, and then sodium carbonate is added for 2 to 3 hours of calcination. After high temperature roasting, the vanadium in the vanadium-containing ferrophosphorus can be converted into sodium vanadate. The sodium vanadate is a water-soluble salt, so that vanadium in the vanadium-containing ferrophosphorus can be poured into the water in the form of vanadate ion by simply pouring the water to obtain a decanted liquid. Finally, the vanadate ion is converted into vanadium pentoxide by means of an ammonium salt vanadium or acid leaching vanadium for further utilization. However, during the calcination process, the phosphorus in the vanadium-containing ferrophosphorus is also converted into sodium monophosphate, which is also a water-soluble salt, so the phosphorus in the vanadium-containing ferrophosphorus will also appear in large numbers. In the decanting liquid, the decanting liquid is changed into a phosphorus-containing mixed solution, and the phosphorus in the mixed solution is removed by the addition of a large amount of the dephosphorizing agent, causing troubles in the refining process.
上述習用之含釩磷鐵提釩之方法，在提煉過程中，需經耗能耗時的焙燒程序，使該提煉製程不僅繁複且冗長，還需耗費龐大的提煉成本。此外，該傾出液中的磷另需大量使用除磷劑來去除，不僅提高除磷成本，還易使釩形成釩酸鈣沉澱而造成釩之損失，進而降低釩之回收率。再者，在焙燒過程中，碳酸鈉會因高溫熔融而形成高黏滯性流體，並附著於窯壁上產生結窯現象，嚴重時，還需停止焙燒來清理窯體，不僅造成該提煉製程上之困擾，也易導致窯體損壞而降低窯體的使用壽命。The above-mentioned method for extracting vanadium from vanadium, phosphorus and iron, in the refining process, requires a roasting process at the time of energy consumption, so that the refining process is not only complicated and lengthy, but also requires a large refining cost. In addition, the phosphorus in the decanting liquid needs to be removed by using a large amount of phosphorus removing agent, which not only increases the cost of dephosphorization, but also easily forms vanadium vanadate by vanadium precipitation, thereby causing loss of vanadium, thereby reducing the recovery rate of vanadium. In addition, during the roasting process, sodium carbonate will form a highly viscous fluid due to high temperature melting, and adhere to the kiln wall to cause the kiln phenomenon. In severe cases, it is necessary to stop the roasting to clean the kiln body, which not only causes the refining process. The troubles are also easy to cause damage to the kiln and reduce the service life of the kiln.
基於上述原因，習用之含釩磷鐵提釩之方法確實有改善之必要。For the above reasons, the conventional method of extracting vanadium from vanadium, phosphorus and iron is indeed necessary for improvement.
本發明目的乃改良習用之缺點，以提供一種含釩磷鐵提釩之方法，以簡化提釩製程而縮短該製程時間為目的。The object of the present invention is to improve the disadvantages of the prior art to provide a method for extracting vanadium from vanadium phosphorus iron to simplify the vanadium removal process and shorten the process time.
本發明次一目的係提供一種含釩磷鐵提釩之方法，可縮短該焙燒時間，以有效降低該焙燒成本者。A second object of the present invention is to provide a method for extracting vanadium from vanadium, phosphorus and iron, which can shorten the baking time to effectively reduce the cost of the baking.
本發明再一目的係提供一種含釩磷鐵提釩之方法，可減少該除磷劑之用量，以節省該除磷過程所需成本者。A further object of the present invention is to provide a method for extracting vanadium from vanadium, phosphorus and iron, which can reduce the amount of the phosphorus removal agent to save the cost of the phosphorus removal process.
本發明又一目的係提供一種含釩磷鐵提釩之方法，以降低釩損失並提升釩之回收率者。Another object of the present invention is to provide a method for extracting vanadium from vanadium, phosphorus and iron to reduce vanadium loss and increase the recovery of vanadium.
本發明又一目的係提供一種含釩磷鐵提釩之方法，可延緩碳酸鈉因高溫而產生結窯現象，以延長窯體的使用壽命者。Another object of the present invention is to provide a method for extracting vanadium from vanadium, phosphorus and iron, which can delay the phenomenon that the sodium carbonate is kiln due to high temperature, so as to prolong the service life of the kiln.
根據本發明的含釩磷鐵提釩之方法，其步驟包含：一混合步驟，將含釩磷鐵、碳酸鈉(Na2 CO3 )及一含鈣輔料均勻混合，以形成一混合物；一焙燒步驟，對該混合物進行焙燒，以獲得一熟料；一傾出步驟，將該熟料與水進行混合，以使該熟料中之釩傾出於水中，再經過濾得一傾出液；一除磷步驟，於該傾出液中加入除磷劑去磷後，得一含釩溶液；及一沉釩步驟，對含釩溶液中之釩酸根離子進行沉釩反應，以獲得五氧化二釩。The method for extracting vanadium from vanadium-containing phosphorus iron according to the present invention comprises the steps of: uniformly mixing vanadium-containing ferrophosphorus, sodium carbonate (Na 2 CO 3 ) and a calcium-containing auxiliary material to form a mixture; Step, the mixture is calcined to obtain a clinker; a decanting step, the clinker is mixed with water, so that the vanadium in the clinker is poured into water, and then filtered to obtain a decanted liquid; a phosphorus removal step, adding a phosphorus removal agent to the deionization solution to obtain a vanadium-containing solution; and a vanadium precipitation step for vanadium precipitation of the vanadate ion in the vanadium-containing solution to obtain a pentoxide oxide vanadium.
為讓本發明之上述及其他目的、特徵及優點能更明顯易懂，下文特舉本發明之較佳實施例，並配合所附圖式，作詳細說明如下：請閱第1圖所示，本發明較佳實施例之含釩磷鐵提釩之方法，係包含一混合步驟S1、一焙燒步驟S2、一傾出步驟S3、一除磷步驟S4及一沉釩步驟S5。The above and other objects, features and advantages of the present invention will become more <RTIgt; The vanadium-containing phosphorus iron vanadium extraction method of the preferred embodiment of the present invention comprises a mixing step S1, a calcining step S2, a decanting step S3, a dephosphorization step S4 and a vanadium precipitation step S5.
該混合步驟S1，將含釩磷鐵、碳酸鈉(Na2 CO3 )及一含鈣輔料均勻混合，以形成一混合物，其中該含鈣輔料係選擇為CaO、Ca(OH)2 、CaCl2 或CaCO3 。該混合步驟S1較佳係先將該含釩磷鐵進行破碎與研磨之前處理，以增加該含釩磷鐵之表面積，使之與該二輔料均勻混合，以提升該混合物之混合均勻度，其中該碳酸鈉Na2 CO3 之添加量為含釩磷鐵重量之0.1至3倍，更佳之碳酸鈉Na2 CO3 添加量係為0.2至1倍；該含鈣輔料之添加量為含釩磷鐵重量之0.1至3倍，更佳之含鈣輔料添加量係為0.2至1倍。In the mixing step S1, vanadium-containing ferrophosphorus, sodium carbonate (Na 2 CO 3 ) and a calcium-containing auxiliary material are uniformly mixed to form a mixture, wherein the calcium-containing auxiliary material is selected from CaO, Ca(OH) 2 and CaCl 2 . Or CaCO 3 . Preferably, the mixing step S1 firstly processes the vanadium-containing ferrophosphorus prior to crushing and grinding to increase the surface area of the vanadium-containing ferrophosphorus and uniformly mix it with the two auxiliary materials to enhance the mixing uniformity of the mixture. The sodium carbonate Na 2 CO 3 is added in an amount of 0.1 to 3 times the weight of the vanadium-containing ferrophosphorus. More preferably, the sodium carbonate Na 2 CO 3 is added in an amount of 0.2 to 1 times; the calcium-containing auxiliary material is added in a vanadium-containing phosphorus The iron weight is 0.1 to 3 times, and more preferably the calcium-containing auxiliary material is added in an amount of 0.2 to 1 times.
該焙燒步驟S2，係對含有該含釩磷鐵、碳酸鈉(Na2 CO3 )及含鈣輔料之混合物進行焙燒，以獲得一熟料。本實施例係選擇將該混合物置於一旋窯中進行焙燒，該反應機制係利用該釩、磷、鈉及鈣間離子親合力的差異來進行反應，藉由該鈉離子對於釩離子之親合力優於磷離子，且鈣離子對於磷離子之親合力優於釩離子，進而形成一磷酸鈣及一釩酸鈉，其化學反應式係如第a及b式所示。The calcining step S2 is to calcine a mixture containing the vanadium-containing ferrophosphorus, sodium carbonate (Na 2 CO 3 ) and the calcium-containing auxiliary material to obtain a clinker. In this embodiment, the mixture is selected to be calcined in a rotary kiln, and the reaction mechanism is carried out by utilizing the difference in affinity between the vanadium, phosphorus, sodium and calcium ions, whereby the sodium ion is in contact with the vanadium ion. The synergistic force is superior to that of phosphorus ions, and the affinity of calcium ions for phosphorus ions is superior to that of vanadium ions, thereby forming calcium monophosphate and sodium vanadate, and the chemical reaction formula is as shown in the formulas a and b.
P4 +6CaO+10O2 →2Ca3 (PO4 )2 ......................(a)P 4 +6CaO+10O 2 →2Ca 3 (PO 4 ) 2 ......................(a)
4V+2Na2 CO3 +5O2 →4NaVO3 +CO2 .............(b)4V+2Na 2 CO 3 +5O 2 →4NaVO 3 +CO 2 .............(b)
在焙燒過程中，該旋窯內可以持續輸送空氣進去，藉此保持一含氧環境，以利該焙燒過程之進行，該焙燒溫度較佳控制於600至1100℃之間，更佳之焙燒溫度控制於700至900℃之間，且該較佳焙燒時間係為0.5至5小時，更佳焙燒時間係為2至3小時，該焙燒完成之熟料係包含不溶於水之磷酸鈣及水溶性之釩酸鈉，在焙燒步驟中，只需短暫焙燒時間，即可將釩由含釩磷鐵中轉化為釩酸鈉，達到良好的提釩效果，以縮減該製程時間並減少其提煉成本，且大部分之磷均會形成不溶於水之磷酸鈣，使含釩磷鐵中之釩與磷分離，以簡化該除磷程序，此外，該添加之含鈣輔料含有大量之鈣化物，該鈣化物具有高熔點及黏滯性低等特性，可增加其滑動性，使碳酸鈉不易融化附著於窯壁上產生結窯現象，以延長窯體的使用壽命。During the roasting process, the rotary kiln can continuously carry air in, thereby maintaining an oxygen-containing environment to facilitate the roasting process, and the roasting temperature is preferably controlled between 600 and 1100 ° C, and more preferably the roasting temperature control Between 700 and 900 ° C, and the preferred calcination time is 0.5 to 5 hours, and the calcination time is 2 to 3 hours. The calcined clinker comprises water-insoluble calcium phosphate and water-soluble. Sodium vanadate, in the calcination step, the vanadium can be converted from vanadium-containing ferrophosphorus to sodium vanadate in a calcination step to achieve a good vanadium extraction effect, thereby reducing the process time and reducing the refining cost, and Most of the phosphorus forms calcium phosphate which is insoluble in water, and the vanadium and phosphorus in the vanadium-containing ferrophosphorus are separated to simplify the phosphorus removal process. In addition, the added calcium-containing auxiliary material contains a large amount of calcification, the calcification. It has high melting point and low viscosity, which can increase its slidability, so that sodium carbonate is not easy to melt and adhere to the kiln wall to produce knot kiln phenomenon, so as to prolong the service life of the kiln.
該傾出步驟S3，將焙燒完成之熟料與水置於一傾出槽中進行混合，該熟料中之釩酸鈉可溶於水中，再經過濾得一傾出液，該傾出步驟S3較佳係先將該熟料進行濕式研磨後進行傾出，以增加釩酸鈉之傾出率及傾出速度。如上述釩酸鈉為一水溶性鹽類，釩酸鈉會溶解於水中，分別以釩酸根離子與鈉離子型態存在於水中。該傾出步驟S3中，該水之添加量為熟料重量之3至4倍，該較佳傾出時間係為0.5至2小時，該傾出槽內之溫度較佳控制於70至95℃之間，經過濾後，大部分的磷均以磷酸鈣之固體樣態被去除，大大降低該傾出液中之磷含量，使該傾出液中磷釩比(P/V)≦0.05，只需經由簡單程序便可將磷去除，因此，在後續之除磷步驟中也可減少該除磷劑之使用量，以節省大量除磷劑所需之成本。In the pouring step S3, the calcined clinker and the water are mixed in a decanting tank, and the sodium vanadate in the clinker is soluble in water, and then filtered to obtain a decanting liquid. The pouring step Preferably, S3 first wets the clinker and then pours it to increase the pour vanadium pour rate and the pour rate. If sodium vanadate is a water-soluble salt, sodium vanadate will be dissolved in water and present in water as vanadate ion and sodium ion form, respectively. In the pouring step S3, the water is added in an amount of 3 to 4 times the weight of the clinker, the preferred pouring time is 0.5 to 2 hours, and the temperature in the pouring tank is preferably controlled at 70 to 95 ° C. Between the filtration, most of the phosphorus is removed as a solid state of calcium phosphate, which greatly reduces the phosphorus content in the decanted liquid, so that the ratio of phosphorus to vanadium (P/V) in the decanted liquid is ≦0.05. The phosphorus can be removed by a simple procedure, so that the amount of the phosphorus removal agent can be reduced in the subsequent phosphorus removal step to save the cost of the large amount of the phosphorus removal agent.
該除磷步驟S4係於該傾出液中加入除磷劑去磷後，得一含釩溶液。因大部分之磷均於上述之傾出步驟S3中去除，所以在除磷步驟S4僅需加入少量之除磷劑，該除磷劑可選擇為氯化鎂、氯化鈣、無機鹽類或高分子混凝劑等，本實施例選擇以氯化鎂及氯化鈣做為除磷劑。經除磷步驟S4處理後之含釩溶液中磷釩比(P/V)僅介於0.003至0.01之間，由於該除磷過程中因除磷劑之用量少，使該釩之損失明顯降低，也提升釩之回收率。The phosphorus removal step S4 is performed by adding a phosphorus removal agent to the decanting solution to obtain a vanadium-containing solution. Since most of the phosphorus is removed in the above-mentioned pouring step S3, only a small amount of the phosphorus removing agent needs to be added in the phosphorus removing step S4, and the phosphorus removing agent may be selected from magnesium chloride, calcium chloride, inorganic salts or polymers. Coagulant, etc., in this embodiment, magnesium chloride and calcium chloride are selected as the dephosphorization agent. The ratio of phosphorus to vanadium (P/V) in the vanadium-containing solution after the phosphorus removal step S4 is only between 0.003 and 0.01, and the loss of the vanadium is obvious due to the small amount of the phosphorus removal agent in the phosphorus removal process. Lowering also increases the recovery of vanadium.
該沉釩步驟S5，係對含釩溶液中之釩酸根離子進行沉釩反應，以獲得五氧化二釩，該沉釩反應可透過胺鹽沉釩或酸浸沉釩的方式，將釩離子轉化為五氧化二釩，本實施例選擇於含釩溶液中加入氯化銨生成一偏釩酸銨，再對該偏釩酸銨進行脫氨反應後，得一高純度的五氧化二釩。The vanadium precipitation step S5 is carried out by vanadium precipitation reaction of vanadate ions in the vanadium-containing solution to obtain vanadium pentoxide. The vanadium precipitation reaction can convert vanadium ions into vanadium ions by means of an ammonium salt vanadium or acid leaching vanadium. Vanadium pentoxide, in this embodiment, ammonium chloride is added to the vanadium-containing solution to form ammonium metavanadate, and then the ammonium metavanadate is deaminated to obtain a high-purity vanadium pentoxide.
為了確定本發明之操作條件對之該提釩效率之影響，以輔料與含釩磷鐵之重量比、焙燒溫度及焙燒時間為控制條件進行實驗，分析在不同控制條件下該提釩效率之變化，以評估該提煉方法之最佳操作條件，在本實施例中，該含鈣輔料係選擇為CaO進行以下實驗。In order to determine the effect of the operating conditions of the present invention on the vanadium extraction efficiency, the experiment was carried out under the control conditions of the weight ratio of the auxiliary material to the vanadium-containing ferrophosphorus, the calcination temperature and the calcination time, and the change of the vanadium extraction efficiency under different control conditions was analyzed. In order to evaluate the optimum operating conditions of the refining method, in the present embodiment, the calcium-containing adjuvant was selected to be CaO for the following experiment.
請參照表一所示，本實施例在固定之焙燒溫度及焙燒時間下，以不同比例之含釩磷鐵與輔料進行測試，發現該第一組至第七組之反應條件下，該回收率均高於70%，其中又以第三組及第四組之比例條件下回收率最高，高達85.5%。依分組測試結果之數據，推得本發明之最佳條件為輔料與含釩磷鐵之重量比係為0.2至1。Referring to Table 1, the present embodiment tests the vanadium-containing ferrophosphorus and the auxiliary materials in different proportions under the fixed calcination temperature and calcination time, and finds the recovery rate under the reaction conditions of the first group to the seventh group. Both are higher than 70%, and the recovery rate is the highest under the conditions of the third group and the fourth group, up to 85.5%. Based on the data of the group test results, the optimum condition of the present invention is that the weight ratio of the excipient to the vanadium-containing ferrophosphorus is 0.2 to 1.
請參照表二所示，本實施例在固定之含釩磷鐵與輔料比及焙燒時間下，進行不同焙燒溫度之測試，發現該第一組至第四組之焙燒溫度下，該回收率均高於70%，其中又以第二組之焙燒溫度下回收率最高，高達85.5%。依分組測試結果之數據，推得本發明之最佳焙燒溫度係為700至900℃。Referring to Table 2, in this embodiment, different calcination temperatures are tested under the fixed vanadium-phosphorus-phosphorus-auxiliary ratio and baking time, and the recovery rates of the first group to the fourth group are found. Above 70%, the recovery rate of the second group is the highest, up to 85.5%. Based on the data of the group test results, it is estimated that the optimum calcination temperature of the present invention is 700 to 900 °C.
請參照表三所示，本實施例在固定之含釩磷鐵與輔料比及焙燒溫度下，進行不同焙燒時間之測試，發現該第一組至第六組之焙燒條件下，該回收率均高於70%，其中又以第三組及第四組之焙燒時間條件下回收率最高，高達85.5%。依分組測試結果之數據，推得本發明之最佳條件為焙燒時間係為2至3小時。Referring to Table 3, in this example, the test results of different calcination times under the fixed vanadium-containing phosphorus-iron-auxiliary ratio and baking temperature, and the recovery rates of the first group to the sixth group are found. Above 70%, the recovery rate of the third group and the fourth group was the highest, up to 85.5%. Based on the data of the group test results, the optimum conditions for the present invention are that the calcination time is 2 to 3 hours.
依上述之實驗測試可得本發明之五氧化二釩提煉方法較佳焙燒條件為二輔料與含釩磷鐵之重量比係為0.1至3、焙燒溫度係為600至1100℃及焙燒時間係為0.5至5小時；該更佳焙燒條件為二輔料與含釩磷鐵之重量比係為0.2至1、焙燒溫度係為700至900℃及焙燒時間係為2至3小時，此外，上述測試可驗證本發明在焙燒過程中藉由添加含鈣輔料，確實較習知之五氧化二釩提煉方法，更提升該釩之回收率，該回收率可達85%。再者，本發明也避免磷對該釩提煉過程所造成的負面影響，不僅降低釩之損失，也提升釩之回收率者，以獲得大量之五氧化二釩。According to the above experimental test, the vanadium pentoxide refining method of the present invention preferably has a calcination condition of a weight ratio of the diauxene to the vanadium-containing ferrophosphorus of 0.1 to 3, a calcination temperature of 600 to 1100 ° C, and a calcination time of 0.5 to 5 hours; the preferred calcination condition is that the weight ratio of the diauxene to the vanadium-containing ferrophosphorus is 0.2 to 1, the calcination temperature is 700 to 900 ° C, and the calcination time is 2 to 3 hours. It is verified that the present invention improves the recovery rate of the vanadium by adding a calcium-containing auxiliary material during the calcination process, and the recovery rate of the vanadium is up to 85%. Furthermore, the present invention also avoids the negative effects of phosphorus on the vanadium refining process, not only reducing the loss of vanadium, but also increasing the recovery of vanadium to obtain a large amount of vanadium pentoxide.
本發明之含釩磷鐵提釩之方法，藉由磷與鈣之高親合力，添加含鈣輔料進行焙燒，以達到簡化該提釩製程而縮短該製程時間，並有效節省焙燒過程所需成本之功效。The method for extracting vanadium from vanadium, phosphorus and iron according to the invention has the high affinity of phosphorus and calcium, adding calcium-containing auxiliary material for roasting, thereby simplifying the vanadium extraction process, shortening the process time, and effectively saving the cost of the roasting process. The effect.
本發明之含釩磷鐵提釩之方法，藉由添加含鈣輔料進行焙燒後，可使磷形成磷酸鈣沉澱後去除，降低該傾出液之磷含量，進而減少該除磷劑之用量，以達到降低釩損失並提升釩之回收率之功效。The method for extracting vanadium from vanadium-containing phosphorus iron according to the present invention, after calcination by adding calcium-containing auxiliary material, can remove phosphorus precipitated by calcium phosphate, reduce the phosphorus content of the decanting liquid, and further reduce the amount of the phosphorus removing agent. In order to reduce vanadium loss and improve the recovery of vanadium.
本發明之含釩磷鐵提釩之方法，藉由添加含有大量之鈣化物之輔料，可延緩碳酸鈉因高溫而產生結窯現象，達到延長窯體的使用壽命之功效。The method for extracting vanadium from vanadium-containing phosphorus iron according to the present invention can delay the effect of sodium carbonate on the kiln due to high temperature by adding an auxiliary material containing a large amount of calcification, thereby achieving the effect of prolonging the service life of the kiln.
雖然本發明已利用上述較佳實施例揭示，然其並非用以限定本發明，任何熟習此技藝者在不脫離本發明之精神和範圍之內，相對上述實施例進行各種更動與修改仍屬本發明所保護之技術範疇，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.
S1．．．混合步驟S1. . . Mixing step
S2．．．焙燒步驟S2. . . Calcination step
S3．．．傾出步驟S3. . . Pour out step
S4．．．除磷步驟S4. . . Phosphorus removal step
S5．．．沉釩步驟S5. . . Step vanadium
第1圖：本發明含釩磷鐵提釩之方法之步驟流程圖。Figure 1 is a flow chart showing the steps of the method for extracting vanadium from vanadium, phosphorus and iron according to the present invention.
S1．．．混合步驟S1. . . Mixing step
S2．．．焙燒步驟S2. . . Calcination step
S3．．．傾出步驟S3. . . Pour out step
S4．．．除磷步驟S4. . . Phosphorus removal step
S5．．．沉釩步驟S5. . . Step vanadium
Claims (14)
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| JPS5739110A (en) * | 1980-08-20 | 1982-03-04 | Sumitomo Metal Ind Ltd | Recovering method for substance from molten pig iron |
| JPS57111214A (en) * | 1980-12-29 | 1982-07-10 | Sumitomo Metal Ind Ltd | Recovering method of phosphorus and vanadium |
| CN101058853A (en) * | 2007-05-18 | 2007-10-24 | 葫芦岛辉宏有色金属有限公司 | Method of reclaiming chemical industry products by using industrial slag containing vanadium, chromium, iron and phosphorous |
| CN101168802A (en) * | 2007-11-30 | 2008-04-30 | 攀钢集团攀枝花钢铁研究院 | Method for comprehensively recovering iron, vanadium and titanium in vanadium-titanium magnetite concentrate |
| CN101215640A (en) * | 2007-01-05 | 2008-07-09 | 陈晓栋 | Method for reclaiming vanadium and rare earth compounds from heavy slag of blast furnace slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5739110A (en) * | 1980-08-20 | 1982-03-04 | Sumitomo Metal Ind Ltd | Recovering method for substance from molten pig iron |
| JPS57111214A (en) * | 1980-12-29 | 1982-07-10 | Sumitomo Metal Ind Ltd | Recovering method of phosphorus and vanadium |
| CN101215640A (en) * | 2007-01-05 | 2008-07-09 | 陈晓栋 | Method for reclaiming vanadium and rare earth compounds from heavy slag of blast furnace slag |
| CN101058853A (en) * | 2007-05-18 | 2007-10-24 | 葫芦岛辉宏有色金属有限公司 | Method of reclaiming chemical industry products by using industrial slag containing vanadium, chromium, iron and phosphorous |
| CN101168802A (en) * | 2007-11-30 | 2008-04-30 | 攀钢集团攀枝花钢铁研究院 | Method for comprehensively recovering iron, vanadium and titanium in vanadium-titanium magnetite concentrate |
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