含钛高炉渣钛的资源化回收利用研究

摘要高炉冶炼工艺产生的含钛高炉渣是一种丰富的含钛资源，作为固体废弃物随意丢弃显然是极大的浪费，如何对废弃资源进行综合利用，是很值得研究的课题。本文以含钛高炉渣为原料，以硫酸铵为熔剂熔融，熔融后反应物蒸馏水浸出，过滤得到含钛溶液，调节 pH 值引发钛液中硫酸氧钛水解形成偏钛酸沉淀，650℃煅烧制备 TiO2；探讨含钛高炉渣中钛元素浸出率以及钛液水解制备二氧化钛的影响因素，通过优化钛浸出和 TiO2 制备工艺参数，确定该工艺流程中的最佳参数。

论文研究结果表明，当高炉渣与助熔剂硫酸氢钾、溶剂硫酸铵质量比为 3:2:21、熔融反应温度 400℃、熔融 60min，钛元素的浸出可达到 82。36%。随着反应温度的升高，钛的浸出率逐渐增加，当达到 400℃时，浸出率最高，继续升高温度，浸出率下降，且变化速率较快。当保温时间在 10min 以内时，随着保温时间的延长，钛的浸出率明显提高；当保温时间超过 10min 以后，钛浸出率没有明显变化；在保温时间达到 60min，钛的浸出率趋于稳定，60min 后开始略有下降。84580

当 EDTA 与 Fe 摩尔比为 2:1、柠檬酸（CA）与 Si 的摩尔比为 2:1、pH=1。3、加热温度 80℃、保温时间 60min，钛液水解充分，得到偏钛酸沉淀完全。沉淀物在 650℃灼烧 60min 时，发生分解，得到产物 TiO2，纯度高达 96。73%。

毕业论文关键词：含钛高炉渣；二氧化钛；硫酸铵

Abstract Blast furnace slag produced by the blast furnace smelting process is an abundant titanium resources, as solid waste thrown away is obviously a great waste, how this misplaced resource utilization, it is worthy of study 。 In this paper, blast furnace slag as raw material, ammonium sulfate as solvent melted molten reactant plus flooding and filtered to give a titanium-containing solution, adjusting the pH caused by hydrolysis of titanyl sulfate, titanium was formed after calcination prepared metatitanic precipitate TiO2; the influence factors titanium - titanium slag leaching rate, and titanium was prepared by hydrolysis of titanium dioxide, and by optimizing the leaching process parameters TiO2, the process of determining the optimum parameters。

Thesis research results show that when high flux slag and potassium hydrogen sulfate, ammonium sulfate, the solvent mass ratio of 3: 2: 21, melting reactiontemperature 400 ℃, melting 60min, leaching titanium element can reach 82。36%。 As thereaction temperature, the titanium leaching rate is gradually increased, when reaches 400℃, the leaching rate was the highest temperature continues to rise, Leaching rate decreased, and the rapid rate of change。 When the holding time in less than 10min when, with the holding time, titanium leaching rate increased significantly; when the holding time exceeds 10min later, iron leaching rate increased at a rate significantly slow side, the magnitude of change is reduced; the holding time reached after 60min titanium leaching rates were stable, there is a slight decline。

When EDTA and Fe molar ratio of 2: 1, citric acid (CA) and the molar ratio of Si is 2: 1, pH = 1。3, heating temperature 80 ℃, holding time of 60min, partial hydrolysis of

titanium was precipitated titanate。 The precipitate was calcined at 650 ℃

decomposed, to give the product TiO2, up to 96。73% purity。

60min,

Key words: Blast furnace slag containing titanium; Titanium dioxide; Ammonium sulfate

第 1 章绪论 1

1。1 含钛高炉渣的概述含钛高炉渣钛的资源化回收利用研究:http://www.youerw.com/huaxue/lunwen_100493.html