Method for preparing titanyl sulfate solution with flotation ilmenite

Abstract

The invention discloses a method for preparing titanyl sulfate solution with flotation ilmenite, which is characterized in that material spraying degree can be reduced in mineral acid reaction, and materials can be prevented from spraying outside an acidolysis pot and belongs to the field of chemical engineering. The method includes the following steps: a evenly mixing powder ilmenite and concentrated sulfuric acid; b placing the evenly mixed powder ilmenite and concentrated sulfuric acid in the acidolysis pot, adding triggering liquid to trigger a mineral acid reaction, and adding antifoaming agents in the acidolysis pot when a large amount of bubbles are generated in the acidolysis pot in the mineral acid reaction; c after mixture of the mineral acid reaction is cured, placing leaching liquid in the acidolysis pot for leaching, and then obtaining titanyl sulfate solution after filtering. The method avoids the phenomena that the materials are sprayed out of the acidolysis pot, ensures safety of operation staff in a production process, improves environment sanitation, reduces labor operation intensity, and further promotes popularization and application of the flotation ilmenite in production of titanium white in sulfuric acid.

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 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-mix the m...

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 concentrate is still reacting, the heat generated accumulates and splashes from the weak point, and splashes out from the opening of the acid solution pot cover, resulting in During the curing process, there is a phenomenon that the dry material is sprayed out of the acid hydrolysis pot. In the worst case, an explosion occurs, which damages the acid hydrolysis pot and seriously affects the operation safety of employees.

In addition, because the temperature of the solid phase of the flotation titanium concentrate before leaching is higher than that of the magnetic separation titanium concentrate, the leaching of the solid phase of the flotation titanium concentrate is more intense at the initial stage, and the pressure generated by bumping makes the leaching material from weak Splashing out of the pot, so that the solid phase material also sprays out of the pot at the initial stage of leaching, which also causes hidden dangers to the safety of employees