Device for producing battery grade ferromanganese phosphate

Abstract

The utility model relates to a device for producing battery-grade ferromanganese phosphate, which is characterized in that an outlet of an iron source dissolving tank is connected with a first filter press, a liquid outlet of the first filter press is connected into a ferrous purified liquid tank, and an outlet of the ferrous purified liquid tank is connected with a ferrous purified liquid metering tank; the upper part of the manganese source dissolving tank is connected with a discharge pipe of a manganese source metering tank; an outlet of the manganese source dissolving tank is connected with a manganese liquid metering tank; outlets of the manganese liquid metering tank and the ferrous purified liquid metering tank are connected to a manganese-iron mixed liquid tank; the outlet of the ferromanganese mixed liquid tank is connected with the reaction kettle; the upper part of the reaction kettle is connected with liquid outlet pipes of the oxidant metering tank and the alkali liquor metering tank; an outlet of the reaction kettle is connected with a second filter press, a solid outlet of the second filter press is connected into a flash dryer through a belt conveyor, and an outlet of the flash dryer is connected with the rotary kiln. According to the invention, accurate raw material preparation, uniform solution stirring and on-line or remote monitoring of flow, pH value, conductivity, temperature and the like are realized, and the purpose of low-cost, continuous and large-scale production of the battery-grade ferromanganese phosphate is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of new battery material technology equipment, and specifically relates to a device for producing battery-grade ferromanganese phosphate. Background Art

[0002] Lithium-ion batteries are increasingly used in everyday life and are gradually being applied to energy storage in large-scale equipment. However, high cost, safety concerns, and toxicity are major obstacles to their application in electric vehicles or large-scale electrostatic energy storage systems. While various types of lithium-ion batteries offer significant advantages, they also have significant disadvantages.

[0003] LiFe x Mn 1-x PO4 cathode materials have attracted widespread attention due to their high cost-effectiveness, environmental friendliness, stability, and safety. In particular, compared to LiFePO4 materials with the same olivine structure, they have a more ideal pressure platform and hold many promising development prospects.

[0004] As a precursor for preparing lithium iron manganese phosphate, the quality of ferromanganese phosphate is crucial. Existing ferromanganese phosphate production facilities primarily utilize traditional liquid-phase precipitation and oxidation-coprecipitation methods. These drawbacks include high equipment requirements, high energy consumption, low production efficiency, and challenges with large-scale production. Furthermore, these methods contain high impurities and result in low product stability. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a device for producing battery-grade ferromanganese phosphate.

[0006] To achieve the above objectives, the utility model adopts the following technical solution: a device for producing battery-grade ferromanganese phosphate, characterized in that: the upper portion of the iron source dissolving tank is connected to the discharge pipe of the iron source feeding tank and the liquid discharge pipe of the phosphoric acid metering tank, the lower outlet of the iron source dissolving tank is connected to the first filter press via an iron source delivery pump, the liquid outlet of the first filter press is connected to the ferrous purification liquid tank, the lower outlet of the ferrous purification liquid tank is connected to the ferrous purification liquid metering tank via the ferrous purification liquid delivery pump; the upper portion of the manganese source dissolving tank is connected to the discharge pipe of the manganese source metering tank, and the lower outlet of the manganese source dissolving tank is connected to the manganese liquid metering tank via the manganese source delivery pump;

[0007] The bottom outlets of the manganese liquid metering tank and the ferrous purification liquid metering tank are both connected to the ferromanganese mixed liquid tank; the lower outlet of the ferromanganese mixed liquid tank is connected to the delivery pipe through the ferromanganese mixed liquid delivery pump, and the delivery pipe is connected to the reactor; the upper part of the reactor is connected to the liquid outlet pipes of the oxidant metering tank and the alkali solution metering tank; the bottom outlet of the reactor is connected to the second filter press through the synthetic slurry delivery pump, and the solid outlet of the second filter press is connected to the flash dryer through a belt conveyor, and the flash dryer outlet is connected to the rotary kiln.

[0008] The phosphoric acid metering tank, manganese source metering tank, manganese liquid metering tank, ferrous purification liquid metering tank, oxidant metering tank and alkali liquid metering tank are respectively arranged on their own weighing devices, and the signal output end of the weighing device is correspondingly connected to the signal input end of the controller.

[0009] The iron source dissolution tank, manganese source dissolution tank, ferrous purification liquid tank, ferromanganese mixed liquid tank and reactor are all equipped with a stirrer controlled by a frequency converter for speed control; the control input end of the stirrer is correspondingly connected to the control output end of the controller.

[0010] The reactor is provided with a thermometer and a pH meter; the signal output ends of the thermometer and the pH meter are correspondingly connected to the signal input end of the controller.

[0011] The outer periphery of the reactor is covered with a heating device.

[0012] The manganese source dissolution tank is connected to a desalted water pipe, which is provided with a flow meter. The delivery pipe is also provided with a flow meter. The signal output end of the flow meter is correspondingly connected to the signal input end of the controller.

[0013] The heating device is a steam heating pipe or an immersed coil heat exchanger.

[0014] The controller is a DCS controller or a PLC controller.

[0015] The beneficial effects of the utility model are: accurate raw material preparation, uniform solution stirring, flow rate, pH, conductivity, temperature, etc. can be monitored online or remotely, so as to achieve the purpose of low-cost, continuous and large-scale production of battery-grade ferromanganese phosphate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the present utility model.

[0017] In the figure: 1- iron source dissolving tank, 11- iron source feeding tank, 2- manganese source dissolving tank, 3- ferrous iron purification liquid tank, 4- ferromanganese mixed liquid tank, 5- reactor, 6- flash dryer, 7- rotary kiln;

[0018] A1-phosphoric acid metering tank, A2-manganese source metering tank, A3-manganese liquid metering tank, A4-ferrous purified liquid metering tank, A5-oxidant metering tank, A6-alkali liquid metering tank; B1-iron source delivery pump, B2-manganese source delivery pump, B3-ferrous purified liquid delivery pump, B4-manganese-iron mixed liquid delivery pump, B5-synthetic slurry delivery pump; D1-first filter press, D2-second filter press; L-delivery pipe. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0020] Example 1

[0021] A device for producing battery-grade ferromanganese phosphate, characterized in that: the upper part of the iron source dissolving tank 1 is connected to the discharge pipe of the iron source feeding tank 11 and the liquid outlet pipe of the phosphoric acid metering tank A1, the lower outlet of the iron source dissolving tank 1 is connected to the first filter press D1 through the iron source delivery pump B1, the liquid outlet of the first filter press D1 is connected to the ferrous purification liquid tank 3, and the lower outlet of the ferrous purification liquid tank 3 is connected to the ferrous purification liquid metering tank A4 through the ferrous purification liquid delivery pump B3; the upper part of the manganese source dissolving tank 2 is connected to the discharge pipe of the manganese source metering tank A2, and the lower outlet of the manganese source dissolving tank 2 is connected to the manganese liquid metering tank A3 through the manganese source delivery pump B2;

[0022] The bottom outlets of the manganese liquid metering tank A3 and the ferrous purified liquid metering tank A4 are both connected to the ferromanganese mixed liquid tank 4; the lower outlet of the ferromanganese mixed liquid tank 4 is connected to the delivery pipe L through the ferromanganese mixed liquid delivery pump B4, and the delivery pipe L is connected to the reactor 5; the upper part of the reactor 5 is connected to the liquid outlet pipes of the oxidant metering tank A5 and the alkali solution metering tank A6;

[0023] The bottom outlet of the reactor 5 is connected to the second filter press D2 through the synthetic slurry delivery pump B5. The solid outlet of the second filter press D2 is connected to the flash dryer 6 through a belt conveyor. The outlet of the flash dryer 6 is connected to the rotary kiln 7.

[0024] The phosphoric acid metering tank A1, manganese source metering tank A2, manganese liquid metering tank A3, ferrous purification liquid metering tank A4, oxidant metering tank A5 and alkali liquid metering tank A6 are respectively arranged on their own weighing devices, and the signal output end of the weighing device is correspondingly connected to the signal input end of the controller.

[0025] The iron source dissolution tank 1, manganese source dissolution tank 2, ferrous purification liquid tank 3, ferromanganese mixed liquid tank 4 and reactor 5 are all equipped with a stirrer controlled by a frequency converter for speed control; the control input end of the stirrer is correspondingly connected to the control output end of the controller.

[0026] The reactor 5 is provided with a thermometer and a pH meter; the signal output ends of the thermometer and the pH meter are correspondingly connected to the signal input end of the controller.

[0027] The outer periphery of the reactor 5 is covered with a heating device; the heating device is a steam heating pipe or an immersed coil heat exchanger.

[0028] The manganese source dissolution tank 2 is connected to a desalted water pipe, which is provided with a flow meter. The delivery pipe L is also provided with a flow meter. The signal output end of the flow meter is correspondingly connected to the signal input end of the controller.

[0029] The controller is a DCS controller or a PLC controller.

[0030] The working process of this utility model:

[0031] Step 1: Phosphoric acid as a raw material is placed in a phosphoric acid metering tank A1, weighed by its weighing device and added to the iron source dissolution tank 1. At the same time, high-purity iron powder is added to the dissolution tank 1 through the iron source feeding tank 11. The agitator is turned on to completely dissolve it. The completely dissolved solution is sent to the first filter press D1 for solid-liquid separation through the iron source delivery pump B1. The ferrophosphorus solution enters the ferrous purification liquid tank 3 for collection, and then the ferrous purification liquid is transferred to the ferrous purification liquid metering tank A4 through the ferrous purification liquid delivery pump B3;

[0032] Step 2: The manganese source is placed in the manganese source metering tank A2 as a raw material, and is added to the manganese source dissolution tank 2 through its weighing device. At the same time, a fixed proportion of desalted water is added to the manganese source dissolution tank 2 through the desalted water pipe, and the agitator is turned on to completely dissolve the manganese liquid to obtain the manganese liquid. The manganese liquid is then delivered to the manganese liquid metering tank A3 through the manganese source delivery pump B2;

[0033] Step 3: The manganese liquid in the manganese liquid metering tank A3 is weighed by its weighing device and added to the ferromanganese mixed liquid tank 4. At the same time, the ferrophosphorus solution in the ferrous purified liquid metering tank A4 is weighed by its weighing device and added to the ferromanganese mixed liquid tank 4. The stirrer is turned on to obtain the ferromanganese mixed liquid;

[0034] Step 4: The ferromanganese mixture is delivered to the reactor 5 via the ferromanganese mixture delivery pump B4, and a fixed ratio of oxidant and alkaline solution is added to the reactor 5 via the oxidant metering tank A5 and the alkali solution metering tank A6. The agitator is turned on and the pH value of the material is monitored with a pH meter to ensure that the pH value of the material is within the range required by the process technical indicators. During the reaction, the reactor 5 is heated using a steam heating pipe and the temperature of the material is detected using a thermometer. After the reaction is completed, a synthetic slurry is obtained.

[0035] Step 5: The synthetic slurry is delivered to the second filter press D2 through the synthetic slurry delivery pump B5 for solid-liquid separation, and the filter cake is washed with desalted water. The conductivity is used to determine whether the washing is qualified. After the washing is qualified, the filter cake is obtained;

[0036] Step 6: The filter cake is transferred to a flash dryer 6 via a belt conveyor for drying to remove free water and obtain ferromanganese phosphate with crystallized water; the dried and dehydrated ferromanganese phosphate is transported to a rotary kiln 7 for calcination to remove crystallized water to obtain anhydrous ferromanganese phosphate and the final product.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for producing battery-grade ferromanganese phosphate, characterized in that: The upper portion of the iron source dissolving tank (1) is connected to the discharge pipe of the iron source feeding tank (11) and the liquid discharge pipe of the phosphoric acid metering tank (A1); the lower outlet of the iron source dissolving tank (1) is connected to the first filter press (D1) via the iron source delivery pump (B1); the liquid outlet of the first filter press (D1) is connected to the ferrous purification liquid tank (3); the lower outlet of the ferrous purification liquid tank (3) is connected to the ferrous purification liquid metering tank (A4) via the ferrous purification liquid delivery pump (B3); the upper portion of the manganese source dissolving tank (2) is connected to the discharge pipe of the manganese source metering tank (A2); the lower outlet of the manganese source dissolving tank (2) is connected to the manganese liquid metering tank (A3) via the manganese source delivery pump (B2); The bottom outlets of the manganese liquid metering tank (A3) and the ferrous purified liquid metering tank (A4) are both connected to the ferromanganese mixed liquid tank (4); the lower outlet of the ferromanganese mixed liquid tank (4) is connected to the delivery pipe (L) via the ferromanganese mixed liquid delivery pump (B4), and the delivery pipe (L) is connected to the reactor (5); the upper part of the reactor (5) is connected to the liquid outlet pipes of the oxidant metering tank (A5) and the alkali liquid metering tank (A6); The bottom outlet of the reactor (5) is connected to the second filter press (D2) through a synthetic slurry delivery pump (B5), the solid outlet of the second filter press (D2) is connected to a flash dryer (6) through a belt conveyor, and the outlet of the flash dryer (6) is connected to a rotary kiln (7).

2. The device for producing battery-grade ferromanganese phosphate according to claim 1, wherein: The phosphoric acid metering tank (A1), manganese source metering tank (A2), manganese liquid metering tank (A3), ferrous purification liquid metering tank (A4), oxidant metering tank (A5) and alkali liquid metering tank (A6) They are respectively arranged on their respective weighing devices, and the signal output ends of the weighing devices are correspondingly connected to the signal input ends of the controller.

3. The device for producing battery-grade ferromanganese phosphate according to claim 1, wherein: The iron source dissolving tank (1), the manganese source dissolving tank (2), the ferrous purification liquid tank (3), the ferromanganese mixed liquid tank (4) and the reactor (5) are all provided with a stirrer controlled by a frequency converter for speed control; the control input end of the stirrer is correspondingly connected to the control output end of the controller.

4. The device for producing battery-grade ferromanganese phosphate according to claim 1, wherein: The reactor (5) is provided with a thermometer and a pH meter; the signal output ends of the thermometer and the pH meter are correspondingly connected to the signal input end of the controller.

5. The device for producing battery-grade ferromanganese phosphate according to claim 1, wherein: The outer periphery of the reactor (5) is covered with a heating device.

6. The device for producing battery-grade ferromanganese phosphate according to claim 1, wherein: The manganese source dissolution tank (2) is connected to a desalted water pipe, and a flow meter is provided on the desalted water pipe; the delivery pipe (L) is also provided with a flow meter; the signal output end of the flow meter is correspondingly connected to the signal input end of the controller.

7. The device for producing battery-grade ferromanganese phosphate according to claim 5, wherein: The heating device is a steam heating pipe or an immersed coil heat exchanger.

8. The device for producing battery-grade ferromanganese phosphate according to any one of claims 2, 3, 4, and 6, characterized in that: The controller is a DCS controller or a PLC controller.

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