(1. 武漢理工大學(xué) 資源與環(huán)境工程學(xué)院，武漢 430070;
2. 武漢理工大學(xué) 礦物資源加工與環(huán)境湖北省重點(diǎn)實(shí)驗(yàn)室，武漢 430070)
摘 要: 采用循環(huán)式電滲析器處理石煤提釩過(guò)程中產(chǎn)生的大量高鹽度、富含重金屬的酸性廢水。結(jié)果表明：在不同電壓條件下，淡水箱中的鹽度在脫鹽開(kāi)始時(shí)變化顯著，隨著脫鹽的進(jìn)行，鹽度變化逐漸趨于平緩；55 V時(shí)的平均脫鹽速率為19.84 mg/(L∙s)，約為25V時(shí)脫鹽速率的3倍；電流隨時(shí)間都表現(xiàn)出先上升再下降的變化趨勢(shì)，55 V時(shí)的單位能耗為25 V時(shí)的2倍。脫鹽過(guò)程中，陰離子的脫除順序?yàn)镃l−、SO42−。試驗(yàn)中單臺(tái)循環(huán)式電滲析的最大淡水產(chǎn)率為78%，淡水可回收用于工業(yè)生產(chǎn)或排放。
關(guān)鍵字: 電滲析；高鹽廢水；釩；石煤
vanadium extraction from stone coal
（1. School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;
2. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology,
Wuhan 430070, China）
Abstract:The acid wastewater produced in vanadium extraction from stone coal was desalinated by electrolysis. The results show that, at different voltages, the salinities of solutions in diluate tank vary rapidly at the beginning of desalination but slowly with the proceeding of desalination. The average desalination rate is 19.84 mg/(L∙s) at 55 V, which is nearly three times faster than that at 25 V. The trends of current identified by the feature increase at initial stage and decrease sharply later. The specific power consumption at 55 V is two times higher than that at 25 V. The anions are removed in the following order: Cl−, SO42−. The maximum water recovery of one electrodialysis unit can reach 78% and the diluate can be recycled in production or discharged.
Key words: electrodialysis; high-salt wastewater; vanadium; stone coal
