A kind of production process and equipment of tetrabasic lead sulfate

Abstract

The invention relates to a production process for tetrabasic lead sulfate (4BS). The process includes the following steps that (1) preparation treatment is conducted, specifically, lead which is subjected to a pre-mixing reaction is delivered into a reaction kettle through a shear pump, a sulfuric acid solution is added into the reaction kettle while internal circulation type stirring is conducted, meanwhile, part of compressed air is led into the reaction kettle, after the sulfuric acid solution is added, the shear pump is started, the reaction kettle is heated, after internal and external circulation type uniform stirring, heating is stopped, the shear pump is shut down, internal circulation type stirring in the reaction kettle is maintained, and meanwhile, compressed air is led into the reaction kettle to cool lead slime; and (2) ball milling is conducted, specifically, the lead slime obtained in the step (1) is conveyed into a dry ball mill, heating drying and a ball milling reaction are conducted synchronously, and the 4BS is obtained. The invention further provides a production device for the 4BS. According to the production process and device, the preparation reaction time is short, the formed 4BS is small in grain size, uniform and controllable, and the average grain size of the obtained 4BS is 2 [mu]m or less.

Description

technical field

[0001] The invention relates to the field of preparation of lead-acid battery materials, in particular to a production process and equipment of tetrabasic lead sulfate. Background technique

[0002] Recently, in the production of lead-acid batteries, in order to prolong the cycle life of the battery, one of the most effective measures is to use a lead paste with a high content of tetrabasic lead sulfate, and the abbreviation of tetrabasic lead sulfate is 4BS, and 4BS as the crystal nucleus The addition of 4BS can control the amount and grain size of the formed 4BS, which overcomes the problem of high-content and large-grain 4BS plate formation, and the battery has excellent discharge performance.

[0003] Chinese invention patent 201310281747.4 discloses a preparation method of tetrabasic lead sulfate, including the following steps: A. Weighing the sample, B. Hydrothermal reaction, C. Ball milling, D. Vacuum drying, E. Post-treatment and other steps. The pre...

Examples

Embodiment 1

[0057] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0058] In the present invention, unless otherwise specified, the raw materials used can be purchased from the market or commonly used in the art. The processes in the following examples are conventional processes in the art unless otherwise specified.

[0059] Refer to the attached figure 1 Describe the production process of tetrabasic lead sulfate according to Embodiment 1 of the present invention. Accurately weigh the lead powder raw material, wherein the lead powder raw material in the present invention is one or more of lead...

Embodiment 2

[0076] Refer to the attached figure 2 and image 3 Describe the production equipment of a kind of tetrabasic lead sulfate of embodiment two of the present invention.

[0077] Such as figure 2 and image 3As shown, a production equipment of tetrabasic lead sulfate includes a preparation processing unit I and a ball milling processing unit II; specifically, the preparation processing unit I includes a sulfuric acid dosing device 1 with a concentrated sulfuric acid solution inside, a reaction kettle 2 and a shear pump 9, the material outlet 2b of the reaction kettle 2 is connected with a delivery pipeline a23, the top of which is communicated with the sulfuric acid dosing device 1 through a sulfuric acid delivery pipeline, and the sulfuric acid delivery pipeline is also provided with a communication reaction The compressed air delivery pipeline 22 inside the still 2, it should be noted that, the compressed air delivery pipeline 22 communicates with a split pipeline and leads...

Embodiment 3

[0084] Such as figure 2 As shown, the parts that are the same as or corresponding to those in the second embodiment are marked with the corresponding reference numerals in the second embodiment. For the sake of simplicity, only the differences from the second embodiment will be described below. The difference between the third embodiment and the second embodiment is that it also includes a pre-mix processing unit III, and the pre-mix processing unit III includes an automatic powder adding device 6 filled with lead powder raw materials, a mixing tank 7 and a deionization unit. The water delivery pipeline 8, the mixing bucket 7 and the reaction kettle 2 are fixed on the workbench 13, the sulfuric acid dosing device 1 and the automatic powder adding device 6 are fixed on the top of the workbench 13 through the support seat 14, the inlet 7a of the mixing bucket 7 is connected to the The automatic powder adding device 6 is connected, and its outlet 7b is communicated with the seco...

technical field

[0001] The invention relates to the field of preparation of lead-acid battery materials, in particular to a production process and equipment of tetrabasic lead sulfate. Background technique

[0002] Recently, in the production of lead-acid batteries, in order to prolong the cycle life of the battery, one of the most effective measures is to use a lead paste with a high content of tetrabasic lead sulfate, and the abbreviation of tetrabasic lead sulfate is 4BS, and 4BS as the crystal nucleus The addition of 4BS can control the amount and grain size of the formed 4BS, which overcomes the problem of high-content and large-grain 4BS plate formation, and the battery has excellent discharge performance.

[0003] Chinese invention patent 201310281747.4 discloses a preparation method of tetrabasic lead sulfate, including the following steps: A. Weighing the sample, B. Hydrothermal reaction, C. Ball milling, D. Vacuum drying, E. Post-treatment and other steps. The pre...

Examples

Embodiment 1

[0057] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0058] In the present invention, unless otherwise specified, the raw materials used can be purchased from the market or commonly used in the art. The processes in the following examples are conventional processes in the art unless otherwise specified.

[0059] Refer to the attached figure 1 Describe the production process of tetrabasic lead sulfate according to Embodiment 1 of the present invention. Accurately weigh the lead powder raw material, wherein the lead powder raw material in the present invention is one or more of lead...

Embodiment 2

[0076] Refer to the attached figure 2 and image 3 Describe the production equipment of a kind of tetrabasic lead sulfate of embodiment two of the present invention.

[0077] Such as figure 2 and image 3As shown, a production equipment of tetrabasic lead sulfate includes a preparation processing unit I and a ball milling processing unit II; specifically, the preparation processing unit I includes a sulfuric acid dosing device 1 with a concentrated sulfuric acid solution inside, a reaction kettle 2 and a shear pump 9, the material outlet 2b of the reaction kettle 2 is connected with a delivery pipeline a23, the top of which is communicated with the sulfuric acid dosing device 1 through a sulfuric acid delivery pipeline, and the sulfuric acid delivery pipeline is also provided with a communication reaction The compressed air delivery pipeline 22 inside the still 2, it should be noted that, the compressed air delivery pipeline 22 communicates with a split pipeline and leads...

Embodiment 3

[0084] Such as figure 2 As shown, the parts that are the same as or corresponding to those in the second embodiment are marked with the corresponding reference numerals in the second embodiment. For the sake of simplicity, only the differences from the second embodiment will be described below. The difference between the third embodiment and the second embodiment is that it also includes a pre-mix processing unit III, and the pre-mix processing unit III includes an automatic powder adding device 6 filled with lead powder raw materials, a mixing tank 7 and a deionization unit. The water delivery pipeline 8, the mixing bucket 7 and the reaction kettle 2 are fixed on the workbench 13, the sulfuric acid dosing device 1 and the automatic powder adding device 6 are fixed on the top of the workbench 13 through the support seat 14, the inlet 7a of the mixing bucket 7 is connected to the The automatic powder adding device 6 is connected, and its outlet 7b is communicated with the seco...

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