Iron phosphate continuous dehydration and crystal form controllable system and control method thereof

Abstract

The invention belongs to the field of iron phosphate preparation, and particularly relates to an iron phosphate continuous dehydration and crystal form controllable system and a control method thereof. The system comprises a flash steaming dryer, a cyclone dust collector, a rotary kiln, a second cyclone dust collector and a packaging machine, which are arranged in sequence along a logistical direction; a hot air blower which is used for supplying air to the flash steaming dryer is arranged at one side of the flash steaming dryer; the hot air blower is communicated with the bottom of the flashsteaming dryer; a beater which is used for beating the hot air and forming cyclone in the flash steaming dryer is arranged at the bottom of the flash steaming dryer; a second beater is arranged between the cyclone dust collector and the rotary kiln; the rotary kiln is an external electric heating type rotary calcining kiln; and a flash dry bag filter which is used for collecting free water tail gas not dehydrated by the cyclone dust collector is arranged between the flash steaming dryer and the rotary kiln. The iron phosphate continuous dehydration and crystal form controllable system and thecontrol method thereof are small in investment, low in energy consumption and suitable for large-scale popularization and application.

Description

technical field

[0001] The invention belongs to the field of ferric phosphate preparation, and in particular relates to a continuous dehydration and crystal form controllable system of ferric phosphate and a control method thereof. Background technique

[0002] In today's society where resource integration is becoming more and more important, more and more industrial manufacturers tend to purchase more functional iron phosphate, such as battery-grade iron orthophosphate, which is specially developed and produced for the characteristics of lithium iron phosphate battery cathode materials. An iron phosphate; it has the characteristics of uniform crystal distribution, small particles, high tap density and high purity. The market for energy storage batteries will be more than ten times the size of all current lithium battery application markets. With the development of urbanization, more than 50% of China's population lives in cities, which has caused difficulties for urban elec...

Examples

Embodiment 1

[0026] Example 1, such as figure 1 , figure 2 As shown, this embodiment provides a continuous dehydration and crystal form controllable system for ferric phosphate, aiming to solve the existing technical problems of complete ferric phosphate crystal form development, high crystallinity, and consistent and controllable crystal form. It is explained here that the current method of crystal form also relies on heating. In this embodiment, the problems of crystal form development and crystallinity are mainly solved. For this reason, the continuous dehydration and crystallization of iron phosphate provided by this embodiment The type controllable system includes a flash dryer, a cyclone dust collector, a rotary kiln, a second cyclone dust collector and a packaging machine arranged in sequence along the logistics direction. The flash dryer mainly removes the free iron phosphate dihydrate wet product Water, the main function of the cyclone dust collector is to collect the ferric pho...

Embodiment 2

[0034] Embodiment 2, this embodiment provides a control method using the iron phosphate continuous dehydration and crystal form control system provided in the above embodiment 1

[0035] Firstly, the iron phosphate filter cake is transported to the hopper of the flash dryer, and is continuously fed into the flash dryer by the screw feeder.

[0036] Then the blower sends the cold air into the hot blast stove for heating to form 250℃~300℃ hot air tangentially enters the bottom of the flash drying, and forms a strong rotating wind field driven by the dispersing motor. The setting of the dispersing machine is to filter the iron phosphate The cake is broken, and at the same time, its rotation can also rotate the wind delivered from the hot blast stove, so that the wet product of ferric phosphate dihydrate can be dispersed, crushed and dried under the action of high temperature and high speed rotating wind field, and free water can be removed.

[0037] After the free water is remove...

technical field

[0001] The invention belongs to the field of ferric phosphate preparation, and in particular relates to a continuous dehydration and crystal form controllable system of ferric phosphate and a control method thereof. Background technique

[0002] In today's society where resource integration is becoming more and more important, more and more industrial manufacturers tend to purchase more functional iron phosphate, such as battery-grade iron orthophosphate, which is specially developed and produced for the characteristics of lithium iron phosphate battery cathode materials. An iron phosphate; it has the characteristics of uniform crystal distribution, small particles, high tap density and high purity. The market for energy storage batteries will be more than ten times the size of all current lithium battery application markets. With the development of urbanization, more than 50% of China's population lives in cities, which has caused difficulties for urban elec...

Examples

Embodiment 1

[0026] Example 1, such as figure 1 , figure 2 As shown, this embodiment provides a continuous dehydration and crystal form controllable system for ferric phosphate, aiming to solve the existing technical problems of complete ferric phosphate crystal form development, high crystallinity, and consistent and controllable crystal form. It is explained here that the current method of crystal form also relies on heating. In this embodiment, the problems of crystal form development and crystallinity are mainly solved. For this reason, the continuous dehydration and crystallization of iron phosphate provided by this embodiment The type controllable system includes a flash dryer, a cyclone dust collector, a rotary kiln, a second cyclone dust collector and a packaging machine arranged in sequence along the logistics direction. The flash dryer mainly removes the free iron phosphate dihydrate wet product Water, the main function of the cyclone dust collector is to collect the ferric pho...

Embodiment 2

[0034] Embodiment 2, this embodiment provides a control method using the iron phosphate continuous dehydration and crystal form control system provided in the above embodiment 1

[0035] Firstly, the iron phosphate filter cake is transported to the hopper of the flash dryer, and is continuously fed into the flash dryer by the screw feeder.

[0036] Then the blower sends the cold air into the hot blast stove for heating to form 250℃~300℃ hot air tangentially enters the bottom of the flash drying, and forms a strong rotating wind field driven by the dispersing motor. The setting of the dispersing machine is to filter the iron phosphate The cake is broken, and at the same time, its rotation can also rotate the wind delivered from the hot blast stove, so that the wet product of ferric phosphate dihydrate can be dispersed, crushed and dried under the action of high temperature and high speed rotating wind field, and free water can be removed.

[0037] After the free water is remove...

Images