Heating or cooling device and technique for high-purity rare earth liquor

Abstract

The invention relates to a heating or cooling device for high-purity rare earth liquor. The heating or cooling device for the high-purity rare earth liquor comprises a liquor tank, a circulating pump, graphite pipes, a circulating pipeline, a temperature control device, a feeding port and a discharging port. The heating technique for the high-purity rare earth liquor comprises the steps that the high-purity rare earth liquor passes through the graphite pipes repeatedly under the circulation effect of the pump, external indirect heating or cooling of the liquor is conducted outside the graphite pipes, and temperature control in the heating or cooling process is achieved in at least one of the methods that after the temperature is measured through a thermoelectric couple, the temperature is fed back to the heating or cooling device and the circulating pump is started. A graphite pipe heater or cooler is made of graphite and particularly made of high-thermal-conductivity graphite, the advantages of high heat transferring speed and corrosion resistance are achieved, and the problem that the liquor is polluted in the heating or cooling process is solved.

Description

technical field [0001] The invention relates to equipment and technology for heating or cooling high-purity rare earth feed liquid, belonging to the field of rare earth compound production. Background technique [0002] In the traditional rare earth precipitation reaction process, in order to heat or cool the feed liquid, the coil is usually passed through the reactor, and the feed liquid is indirectly heated by steam or cold water is used to indirectly cool the feed liquid. The disadvantage of this method is that it is not easy to automatically control and accurately control the temperature of the feed liquid , higher energy consumption. In recent years, heat-conducting oil coil heating reaction tanks have gradually been used for heating rare earth feed liquids, but there are many disadvantages such as the need to add biphenyl mixture in the heat-conducting oil and the fact that it is easy to explode. In addition, the coil heating or cooling method of the reactor still has...

AI Technical Summary

Problems solved by technology

[0002] In the traditional rare earth precipitation reaction process, in order to heat or cool the feed liquid, the coil is usually passed through the reactor, and the feed liquid is indirectly heated by steam or cold water is used to indirectly cool the feed liquid. The disadvantage of this method is that it is not easy to automatically control and accurately control the temperature of the feed liquid , higher energy consumption

In recent years, heat conduction oil coil heating reaction tanks have gradually been used for heating rare earth feed liquids, but there are many disadvantages such as the need to add biphenyl mixture in the heat conduction oil, and it is easy to explode.

In addition, the coil heating or cooling method of the reactor still has the problem of material corrosion resistance, the service life of the equipment is limited, the product quality is reduced due to material corrosion, and this heating method also has problems such as large investment and large equipment footprint.

Images