Method for recycling lithium manganate ground material

Abstract

The invention discloses a method for recycling lithium manganate ground materials, and belongs to the technical field of lithium manganate recycling. The method comprises the following steps: carrying out ultrasonic vibration coarse screening on collected falling materials; putting the material subjected to coarse screening in the step 1 into an inclined mixing machine for mixing; performing multi-point sampling on the mixed material in the step 2, analyzing the contents of two elements, namely manganese and lithium, averaging, and calculating the lithium-manganese ratio; comparing the lithium-manganese ratio in the step 3 with the lithium-manganese ratio of normal lithium manganate, and calculating the deviation of the material lithium carbonate or manganese dioxide; according to the deviation in the step 4, supplementing lithium carbonate or manganese dioxide, then carrying out secondary mixing, and after mixing is completed, sampling again to test the lithium-manganese ratio; and after the lithium-manganese ratio is qualified, carrying out sintering, crushing, ultrasonic vibration screening and electromagnetic iron removal to obtain a second-grade finished product. The method saves cost and reduces loss.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium manganate recovery, and particularly to a method for recycling lithium manganate floor materials. Background Art

[0002] Lithium-ion batteries are currently widely used. Especially for lithium manganate materials, the manufacturing cost is relatively low, mainly due to the relatively high raw material cost. Especially lithium carbonate, as the main raw material of lithium manganate, has a high price and large fluctuations.

[0003] Precisely because of the high price of raw materials, every bit of spilled material during the production process, or the fallen material caused by equipment failures, is no small loss. Previously, they were all collected, but due to the large amount of impurities, they were all wasted as scrap.

[0004] After the materials are collected, due to too many impurities, they can only be scrapped and cannot be reused. Therefore, it is very necessary to develop a method for recycling lithium manganate floor materials. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method for recycling lithium manganate floor materials, which method saves costs and reduces losses.

[0006] To achieve the above invention purpose, the present invention adopts the following technical scheme: A method for recycling lithium manganate floor materials, comprising the following steps:

[0007] Step 1: Ultrasonically vibrate and roughly screen the collected floor materials to remove relatively large particulate foreign matters and impurities.

[0008] Step 2: Put the materials roughly screened in Step 1 into an inclined mixer for mixing.

[0009] Step 3: Take multi-point samples of the mixed materials in Step 2, use elemental analysis to analyze the contents of two elements, manganese and lithium, take the average value, and calculate the lithium-manganese ratio.

[0010] Step 4: Compare the lithium-manganese ratio in Step 3 with the lithium-manganese ratio of normal lithium manganate, and calculate the deviation of lithium carbonate or manganese dioxide in the materials.

[0011] Step 5: According to the deviation in Step 4, supplement lithium carbonate or manganese dioxide and then perform secondary mixing. After the mixing is completed, re-sample and test the lithium-manganese ratio.

[0012] Step 6: After the lithium-manganese ratio is qualified, perform sintering, crushing, ultrasonic vibration sieving, and electromagnetic iron removal to obtain second-class product finished products.

[0013] Further, the mesh number of the sieving in Step 1 is 200 meshes.

[0014] Further, the mixing time in Step 2 is 40 - 100 min.

[0015] Further, the secondary mixing time in Step 5 is 40 - 100 min.

[0016] Further, the mesh number of sieving in Step 6 is 325 meshes.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The method for recycling manganese lithium oxide floor materials of the present invention can treat and reuse the previously scrapped materials, saving costs and reducing losses.

[0019] 2. The method for recycling manganese lithium oxide floor materials of the present invention can reduce the generation of hazardous waste, reduce treatment costs, and reduce pollution. Specific Embodiments

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] Embodiment 1

[0022] The embodiment of the present invention provides a method for recycling manganese lithium oxide floor materials, including the following steps:

[0023] (1) Take 500 kg of floor materials, perform sieving with 200 meshes, put the sieved materials into an inclined mixer, and mix for 60 minutes.

[0024] (2) After the mixing is completed, take out the materials for lithium-manganese ratio testing. According to the test results, add 15 kg of lithium carbonate and mix again for 60 minutes.

[0025] (3) Test the lithium-manganese ratio of the mixed materials again. After the lithium-manganese ratio is qualified, enter a pusher kiln for sintering.

[0026] (4) After sintering is completed, perform air-flow milling damage. After the damage is completed, sieve with 325 meshes, and finally perform electromagnetic iron removal.

[0027] Embodiment 2

[0028] The embodiment of the present invention provides a method for recycling manganese lithium oxide floor materials, including the following steps:

[0029] (1) Take 300 kg of floor materials, perform sieving with 200 meshes, put the sieved materials into an inclined mixer, and mix for 60 minutes.

[0030] (2) After the mixing is completed, take out the material for lithium-manganese ratio testing. According to the test results, add 8 kg of lithium carbonate and mix again for 60 minutes.

[0031] (3) Test the lithium-manganese ratio of the mixed and discharged material again. After the lithium-manganese ratio is qualified, feed it into a pusher kiln for sintering.

[0032] (4) After sintering is completed, carry out airflow milling for breakage. After the breakage is completed, sieve through a 325-mesh sieve, and finally pass through electromagnetic iron removal.

[0033] Example 3

[0034] The embodiment of the present invention provides a method for recycling manganese lithium oxide floor materials, including the following steps:

[0035] (5) Take 600 kg of floor materials, sieve through a 200-mesh sieve, put the sieved materials into an inclined mixer, and mix for 60 minutes.

[0036] (6) After the mixing is completed, take out the material for lithium-manganese ratio testing. According to the test results, add 20 kg of lithium carbonate and mix again for 60 minutes.

[0037] (7) Test the lithium-manganese ratio of the mixed and discharged material again. After the lithium-manganese ratio is qualified, feed it into a pusher kiln for sintering.

[0038] (8) After sintering is completed, carry out airflow milling for breakage. After the breakage is completed, sieve through a 325-mesh sieve, and finally pass through electromagnetic iron removal.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for recycling manganese lithium oxide floor materials, characterized in that, It includes the following steps: Step 1: Conduct ultrasonic vibration rough screening on the collected floor materials; Step 2: Put the materials obtained from the rough screening in Step 1 into an inclined mixer for mixing; Step 3: Take multi-point samples of the mixed materials in Step 2, analyze the contents of two elements, manganese and lithium, using elemental analysis, take the average value, and calculate the lithium-manganese ratio; Step 4: Compare the lithium-manganese ratio in Step 3 with the lithium-manganese ratio of normal lithium manganate, and calculate the deviation of lithium carbonate or manganese dioxide in the materials; Step 5: Complement lithium carbonate or manganese dioxide according to the deviation in Step 4, and then conduct secondary mixing. After the mixing is completed, re-sample and test the lithium-manganese ratio; Step 6: After the lithium-manganese ratio is qualified, conduct sintering, crushing, ultrasonic vibration sieving, and electromagnetic iron removal to obtain second-class finished products.

2. The method for recycling manganese lithium oxide floor material according to claim 1, characterized in that, The mesh number of the sieving in Step 1 is 200 meshes.

3. The method for recycling manganese lithium oxide floor material according to claim 1, characterized in that The mixing time in Step 2 is 40 - 100 min.

4. The method for recycling manganese lithium oxide floor material according to claim 1, characterized in that, The secondary mixing time in Step 5 is 40 - 100 min.

5. The method for recycling manganese lithium oxide floor materials according to claim 1, characterized in that, The mesh number of the sieving in Step 6 is 325 meshes.