High titanium slag and KOH solution were used to synthesize potassium titanate whiskers. The acid conversion of potassium titanate whiskers in hydrochloric acid solution can directly prepare titanium dioxide. When the conversion temperature was 130 °C, the influence of hydrochloric acid concentration on the acid conversion of potassium titanate whiskers to titanium dioxide was investigated. The increase in hydrochloric acid concentration was beneficial to the removal of impurity elements. When the hydrochloric acid concentration was 15 wt%, the titanium dioxide content of the obtained product reached 99.1%. At an acid concentration below 15 wt%, the morphology of the acid conversion product was mainly multibranched and flower-like with a hierarchical structure. When the concentration was 20 wt% and 25 wt%, the morphology was slender fusiform. The phase of the obtained products was rutile. A detailed study was conducted at the hydrochloric acid concentration of 15 wt%, to investigate the phase and morphology transformation of potassium titanate whiskers into titanium dioxide. Only the splitting and dissolution of potassium titanate whiskers occurred in the initial stage. Rutile began to form at approximately 30 min. After that, the dissolution of potassium titanate and the formation of rutile continued. When the rutile crystals grew larger, they became multibranched hierarchical structures.

高钛渣和KOH溶液用于合成钛酸钾晶须。钛酸钾晶须在盐酸溶液中酸化可直接制备二氧化钛。研究了转化温度为130 ℃时盐酸浓度对钛酸钾晶须酸转化为二氧化钛的影响。盐酸浓度的增加有利于杂质元素的去除。当盐酸浓度为15wt%时，所得产物的二氧化钛含量达到99.1%。在酸浓度低于 15 wt% 时，酸转化产物的形态主要是多支化和花状的，具有层次结构。当浓度为20 wt%和25 wt%时，形态呈细长梭形。所得产物相为金红石。在 15 wt% 的盐酸浓度下进行了详细研究，以研究钛酸钾晶须向二氧化钛的相变和形态转变。初期仅发生钛酸钾晶须的分裂和溶解。金红石在大约 30 分钟时开始形成。之后，钛酸钾的溶解和金红石的形成继续进行。当金红石晶体变大时，它们变成多分支的层次结构。初期仅发生钛酸钾晶须的分裂和溶解。金红石在大约 30 分钟时开始形成。之后，钛酸钾的溶解和金红石的形成继续进行。当金红石晶体变大时，它们变成多分支的层次结构。初期仅发生钛酸钾晶须的分裂和溶解。金红石在大约 30 分钟时开始形成。之后，钛酸钾的溶解和金红石的形成继续进行。当金红石晶体变大时，它们变成多分支的层次结构。