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<p>In response to industry issues such as low utilization value and narrow utilization channels of titanium (Ti) resources in Ti-containing blast furnace slag (TBFS), the experimental parameters for preparing a chelated microtitanium (microTi) fertilizer solution using the process of ammonium salt roasting of water-quenched TBFS and acid leaching chelation were explored. A roasting temperature of 450&#xa0;°C, roasting time of 60&#xa0;min, mass ratio of water quenching TBFS to ammonium sulfate of 1:4, sulfuric acid concentration of 0.5&#xa0;mol/L, leaching temperature of 60&#xa0;°C, leaching time of 30&#xa0;min, and ratio of liquid to solid of 2 exhibited a high Ti leaching rate (90.7%). Moreover, the concentration of Ti in the solution was 5.04&#xa0;g/L, when the molar mass of citric acid monohydrate (C<sub>6</sub>H<sub>8</sub>O<sub>7</sub>·H<sub>2</sub>O) to Ti in the leaching solution was 2:1, the pH of the solution was adjusted to &gt; 4.8 using sodium hydrogen carbonate, and the solution was stirred at 60&#xa0;°C for 30&#xa0;min. No titanium oxysulfate flocculent appeared under these conditions. The chelating effect was good, and the chelating microTi fertilizer solution was obtained, achieving the goal of high-value utilization of Ti resources in the slag in agriculture and forestry fields.</p> Graphical Abstract <p></p>

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Preparation of a Chelated Microtitanium Fertilizer Solution from Water Quenching Titanium-Containing Blast Furnace Slag

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Lin Li,
  • Qiang Yang,
  • Yanli Ren,
  • Zhiqiao Li,
  • Panlin Yan,
  • Guanwu Zeng

摘要

In response to industry issues such as low utilization value and narrow utilization channels of titanium (Ti) resources in Ti-containing blast furnace slag (TBFS), the experimental parameters for preparing a chelated microtitanium (microTi) fertilizer solution using the process of ammonium salt roasting of water-quenched TBFS and acid leaching chelation were explored. A roasting temperature of 450 °C, roasting time of 60 min, mass ratio of water quenching TBFS to ammonium sulfate of 1:4, sulfuric acid concentration of 0.5 mol/L, leaching temperature of 60 °C, leaching time of 30 min, and ratio of liquid to solid of 2 exhibited a high Ti leaching rate (90.7%). Moreover, the concentration of Ti in the solution was 5.04 g/L, when the molar mass of citric acid monohydrate (C6H8O7·H2O) to Ti in the leaching solution was 2:1, the pH of the solution was adjusted to > 4.8 using sodium hydrogen carbonate, and the solution was stirred at 60 °C for 30 min. No titanium oxysulfate flocculent appeared under these conditions. The chelating effect was good, and the chelating microTi fertilizer solution was obtained, achieving the goal of high-value utilization of Ti resources in the slag in agriculture and forestry fields.

Graphical Abstract