为了解决钛石膏综合利用问题，提出一种温和的湿化学法转化法，采取铵盐循环的方式实现以低价碳酸氢铵为原料、使钛石膏固废转化为高质量碳酸钙产品，同时获得硫酸铵和富铁渣。试验结果表明，钛石膏与碳酸氢铵的质量比为1∶1、反应温度为65 ℃、反应时间为1.25 h条件下，钛石膏的转化率可以达到95%以上，将转化后的碳酸钙和铁渣等与氯化铵加热沸腾反应并回收碳酸铵，将反应完成后的固液分离，利用回收的碳酸铵与分离液体进一步反应可得纯度高达98%以上的碳酸钙和含铁量高达61%以上的铁渣。

In order to solve the problem of comprehensive utilization of titanium gypsum，a mild wet chemical conversion method was put forward.Using low-price ammonium bicarbonate as raw material，titanium gypsum solid waste was converted into high-quality calcium carbonate products，and ammonium sulfate and iron-rich slag were obtained at the same time.The test results showed that under the conditions of mass ratio of titanigypsum to ammonium bicarbonate of 1∶1，reaction temperature of 65 ℃ and reaction time of 1.25 h，the conversion rate of titanigypsum could reach more than 95%.The converted solid calcium carbonate and iron slag were heated and boiled with NH₄Cl to recover ammonium carbonate，and the solid-liquid separation after the reaction was completed.Further reaction of the recovered ammonium carbonate with the separation liquid could obtain calcium carbonate with purity of more than 98% and iron slag with iron content of more than 61%.