Method for preparing titanium oxysulfate solution by flotation of titanium concentrate

Abstract

The invention discloses a method for preparing a titanium oxysulfate solution by flotation of titanium concentrate, and belongs to the field of chemical engineering, wherein the method has characteristics of reduction of material spitting degree during the mineral acid reaction and avoidance of material spitting out of the acid hydrolysis pot during the mineral acid reaction. The method comprises the following steps: a, uniformly mixing titanium concentrate powder and concentrated sulfuric acid; b, placing the resulting mixture in an acid hydrolysis pot, adding an initiation liquid to initiate a mineral acid reaction, and blowing high pressure gas to the acid hydrolysis pot during the mineral acid reaction; c, carrying out ripening on the mixture after the mineral acid reaction, adding a leaching liquid to the acid hydrolysis pot to carry out leaching, and filtering to obtain the titanium oxysulfate solution. With the method of the present invention, the phenomenon of the material spitting out of the acid hydrolysis pot is avoided, the safety of the operator during the production process is ensured, the environmental sanitation is improved, and the labor operation intensity is reduced, such that the popular application of the titanium concentrate flotation in the titanium pigment production by the sulfuric acid method is promoted.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for preparing titanyl sulfate solution by utilizing flotation titanium concentrate. Background technique [0002] Titanium concentrate is extracted from ilmenite or titanomagnetite, and is a very versatile raw material for titanium dioxide. To produce titanium dioxide with titanium concentrate, the first step is to prepare a titanyl sulfate solution. The method for preparing a titanyl sulfate solution from titanium concentrate usually includes the following process: send the titanium concentrate to a wind-swept mill for grinding, and the ground mineral powder is recycled The air is sent to the classifier for classification, and the coarse-grained ore powder that does not meet the requirements is sent to the air-swept mill for continuous grinding, and the ore powder that meets the required particle size is sent to the storage bin. Before acidolysis, first pre...

AI Technical Summary

Problems solved by technology

However, the following technical problems will occur in the process of preparing titanyl sulfate by using flotation titanium concentrate: the fatty acid flotation agent contained in the flotation titanium concentrate will decompose instantly under the conditions of aerobic, acid and certain temperature generate a lot of SO 2 , CO 2 The bubbles formed by water vapor and gas rapidly expand the volume of the reaction in a short time, up to 5 times the volume of the premix, and expand multiple times, lasting for 2 to 3 minutes, and form splashes in the later bubble rupture. A small amount of material is brought out of the acid hydrolysis pot from the opening of the lid. The temperature of this material is higher than 180°C and the content of sulfuric acid is >80%, which seriously affects the safety of employees.

This makes the reaction asynchronous, the magnetic separation titanium concentrate is reacted and solidified, the flotation titanium conce