Method for microwave drying of high-titanium slag

Abstract

The invention relates to a method for microwave drying of high-titanium slag, which comprises the following steps: taking the high-titanium slag of which the water content is between 1 and 2 percent as a raw material; adopting a continuous microwave drying device; according to relatively fixed microwave power, changing the ventilation volumes of different microwave cavities and further adjusting parameters of the transporting rate of materials in the microwave cavities, the thickness of the material and the like; and mounting a stirrer and cavity clapboards in the microwave drying device. Theventilation volumes of ventilation devices in the microwave cavities are controlled to be between 1,247 and 2,250 m<3> / h, the speed rate of a conveying belt is between 0.5 and 2 meters per minute, the thickness of material layers is controlled to be between 1 and 5 centimeters, an air exhaust deduster is arranged at the top end of a discharge device, and the stirrer and the cavity clapboards are arranged on the microwave drying device, thus the method achieves the effect that the mass water content of the high-titanium slag is dried to be 0.3 percent from 1 to 2 percent by effectively controlling the drying temperature of the high-titanium slag to be between 70 and 76 DEG C.

Description

A kind of microwave drying method of high titanium slag 1. Technical field The invention relates to a microwave drying method for high-titanium slag, belonging to the technical field of microwave heating applications. 2. Background technology In the titanium industry, foreign advanced enterprises mainly use high-titanium slag as raw material to produce titanium tetrachloride by the boiling chlorination method to prepare subsequent titanium dioxide and titanium sponge. Especially for the titanium dioxide industry, the boiling chlorination method has a process Short, easy to expand production capacity, high degree of continuous automation, relatively low energy consumption, less "three wastes" and high product quality rate. Boiling chlorination is to mix high-titanium slag powder and petroleum coke for high-temperature chlorination to produce titanium tetrachloride. In the process of producing titanium tetrachloride, due to the need for stacking and other processes, the moi...

AI Technical Summary

Problems solved by technology

In the known drying process, whether it is electric heating, steam heating, or fuel heating, the heat transfer is carried out from the surface to the inside, and it takes a long time to remove moisture, which reduces the drying efficiency; at the same time, when high titanium When the slag reaches a higher temperature (above 120°C), it can be dried into the material, which undoubtedly increases the drying cost