Treatment method of artificial rutile mother liquor

Abstract

The invention discloses a treatment method of artificial rutile mother liquor. The treatment method comprises the following steps of: adding reduced titanium into the artificial rutile mother liquor to carry out leaching reaction; after the reaction is finished, carrying out solid-liquid separation to obtain mother liquor and a solid-phase substance; calcining the solid-phase substance to obtain artificial rutile, wherein the acid concentration in the obtained mother liquor is less than 3%, the leaching temperature is 50-120 DEG C, and the leaching reaction time is 2-8 hours; the mass-volume ratio (g: mL) of the reduced titanium to the artificial rutile mother liquor is 1: (4-7), the metallization ratio of iron in the reduced titanium is 60-90%, and the acid mass concentration in the artificial rutile mother liquor is 8-12%. According to the treatment method, the artificial rutile mother liquor is treated by adopting the reduced titanium, and the residual acid content in the treated mother liquor is less than 3%, so that the utilization rate of hydrochloric acid is increased, the yield of rutile is increased, the iron concentration in the mother liquor is increased, and the energyconsumption and the treatment difficulty are reduced for the subsequent treatment of the mother liquor.

Description

technical field [0001] The invention relates to a waste liquid treatment method in the chemical industry, in particular to a treatment method for artificial rutile mother liquor. Background technique [0002] Artificial rutile is an important basic raw material for the titanium industry. It is mainly used in the production of chlorinated titanium dioxide, titanium sponge, titanium tetrachloride and electrode coatings. It is an excellent substitute for natural rutile. Among the different production process routes of artificial rutile, the artificial rutile production process of hydrochloric acid method has the advantages of fast leaching speed, strong impurity removal ability, high product quality, and is suitable for processing various types of mineral sources. It has become the mainstream process and realized industrialization very early. . [0003] In the research on enrichment methods of titanium concentrate in the world, people have studied and proposed more than 20 enr...

AI Technical Summary

Problems solved by technology

In order to ensure the leaching efficiency during the production of artificial rutile, the ratio of ore to acid is generally maintained at 1:3 to 1:3.5 (22% to 26% hydrochloric acid), and the theoretical excess of hydrochloric acid is more than 50%, resulting in a large amount of residual acid and iron in the mother liquor. The ion concentration is low, a large amount of evaporation is required during crystallization separation, and in order to improve the crystallization efficiency, it needs to be frozen. These processes all consume a lot of energy and increase the processing cost, and the excessive hydrochloric acid is not effectively used, which increases the production cost.

It can be seen that the current treatment of artificial rutile mother liquor focuses on the recovery of hydrochloric acid and iron elements. There are also patents that use rutile mother liquor to pretreat modified titanium concentrate, and the treated modified titanium concentrate is acid-leached, and modified The concentration of hydrochloric acid in the mother liquor after titanium concentrate is reduced from about 10% to about 6-8%, and it is difficult to react with titanium concentrate, so the residual acid has not been effectively recycled.