Lead plaster desulfurization transforming method for waste lead-acid storage batteries

Abstract

The invention discloses a lead plaster desulfurization transforming method for waste lead-acid storage batteries, which belongs to the field of waste battery disposal. The method comprises the following steps: (1) the preparation of a lead plaster original sample: carrying out decomposition on waste lead-acid storage batteries, taking out a grid alloy, taking out lead plaster from a grid, removing impurities in the lead plaster, drying the lead plaster in an environment at a temperature of 80-90 DEG C, and grinding the lead plaster in a grinding machine for 10-30 min so as to obtain the lead plaster original sample with a particle size of 50-300 mu m; (2) the configuration of a desulfurization transforming agent: preparing a desulfurization transforming agent into transforming liquid, and heating the desulfurization transforming liquid to 20-90 DEG C by using a constant-temperature water bath bed; (3) full reaction: adding weighted lead plaster into the transforming liquid obtained in step (2), and stirring the obtained mixture, so that the mixture is fully reacted; and (4) after the transforming is completed, cooling and filtering the obtained product, and carrying out repeated washing and residue filtering on the obtained product for many times by using distilled water. According to the method, the desulfurization transforming process parameters of lead plaster in waste lead-acid storage batteries are determined, PbSO4 is effectively transformed into easily-decomposed PbCO3, the energy consumption is lowered, and the environmental pollution is reduced.

Description

technical field

[0001] The invention belongs to the field of waste battery treatment, and more specifically relates to a desulfurization conversion method for lead paste of waste lead-acid batteries. Background technique

[0002] In recent years, with the depletion of lead ore resources and the increasing lead consumption of lead-acid batteries, recycling lead from waste lead-acid batteries has become an important way to achieve sustainable development of lead resources. However, in our country, due to the immature technology, there are a lot of heavy metals or SO in the process of lead regeneration. 2 Discharged into the environment, causing pollution. At present, the lead consumption of lead-acid batteries in my country accounts for about 70% of the total, but the recovery rate of waste lead batteries is less than 90%, while developed countries generally guarantee 100%; in addition, the lead recovery rate in my country's secondary lead smelting process is generally 80% % ...

Examples

Embodiment 1

[0037] A kind of waste lead-acid battery lead paste desulfurization conversion method of the present embodiment 1, its steps are:

[0038] (1) Prepare the lead paste as it is

[0039] Decompose the waste lead-acid battery to take out the grid alloy, remove the lead paste from the grid, remove the sundries, dry it in an environment of 80°C, and grind it in a grinder for 10 minutes to obtain the lead paste with a particle size of 50 μm as it is;

[0040] (2) Configuration of desulfurization conversion agent

[0041] The desulfurization conversion agent is prepared as a conversion liquid, and the desulfurization conversion agent is Na 2 CO 3 , NH 4 HCO 3 and K 2 CO 3 mixture, and Na 2 CO 3 : NH 4 HCO 3 :K 2 CO 3 =1:2~3:1 (mass ratio). The pH value of the conversion solution was 6. CO in conversion fluid 3 2- The concentration is 0.5mol / L, and the desulfurization conversion liquid is heated to 20°C with a constant temperature water bath;

[0042] (3) full response...

Embodiment 2

[0046] A kind of waste lead-acid battery lead paste desulfurization conversion method of the present embodiment 2, its steps are:

[0047](1) Prepare the lead paste as it is

[0048] Decompose the waste lead-acid battery to take out the grid alloy, remove the lead paste from the grid, remove the sundries, dry it in an environment of 85°C, and grind it in a grinder for 20 minutes to obtain the lead paste with a particle size of 100 μm as it is;

[0049] (2) Configuration of desulfurization conversion agent

[0050] The desulfurization conversion agent is prepared as a conversion liquid, and the desulfurization conversion agent is Na 2 CO 3 , NH 4 HCO 3 and K 2 CO 3 mixture, and Na 2 CO 3 : NH 4 HCO 3 :K 2 CO 3 =1:3~4:1 (mass ratio). CO in conversion fluid 3 2- The concentration is 1.0mol / L, and the pH value of the conversion solution is 7. Heat the desulfurization conversion liquid to 70°C with a constant temperature water bath;

[0051] (3) full response

[0...

Embodiment 3

[0055] A kind of waste lead-acid storage battery lead paste desulfurization conversion method of the present embodiment 3, its steps are:

[0056] (1) Prepare the lead paste as it is

[0057] Decompose the waste lead-acid battery to take out the grid alloy, remove the lead paste from the grid, remove the sundries, dry it in an environment of 90°C, and grind it in a grinder for 30 minutes to obtain the lead paste with a particle size of 300 μm as it is;

[0058] (2) Configuration of desulfurization conversion agent

[0059] The desulfurization conversion agent is prepared as a conversion liquid, and the desulfurization conversion agent is Na 2 CO 3 , NH 4 HCO 3 and K 2 CO 3 mixture, and Na 2 CO 3 : NH 4 HCO 3 :K 2 CO 3 =1:5~6:1 (mass ratio). CO in conversion fluid 3 2- The concentration of the desulfurization conversion liquid is 1.5mol / L, the pH value of the conversion liquid is 9.5, and the desulfurization conversion liquid is heated to 90°C with a constant tem...

technical field

[0001] The invention belongs to the field of waste battery treatment, and more specifically relates to a desulfurization conversion method for lead paste of waste lead-acid batteries. Background technique

[0002] In recent years, with the depletion of lead ore resources and the increasing lead consumption of lead-acid batteries, recycling lead from waste lead-acid batteries has become an important way to achieve sustainable development of lead resources. However, in our country, due to the immature technology, there are a lot of heavy metals or SO in the process of lead regeneration. 2 Discharged into the environment, causing pollution. At present, the lead consumption of lead-acid batteries in my country accounts for about 70% of the total, but the recovery rate of waste lead batteries is less than 90%, while developed countries generally guarantee 100%; in addition, the lead recovery rate in my country's secondary lead smelting process is generally 80% % ...

Examples

Embodiment 1

[0037] A kind of waste lead-acid battery lead paste desulfurization conversion method of the present embodiment 1, its steps are:

[0038] (1) Prepare the lead paste as it is

[0039] Decompose the waste lead-acid battery to take out the grid alloy, remove the lead paste from the grid, remove the sundries, dry it in an environment of 80°C, and grind it in a grinder for 10 minutes to obtain the lead paste with a particle size of 50 μm as it is;

[0040] (2) Configuration of desulfurization conversion agent

[0041] The desulfurization conversion agent is prepared as a conversion liquid, and the desulfurization conversion agent is Na 2 CO 3 , NH 4 HCO 3 and K 2 CO 3 mixture, and Na 2 CO 3 : NH 4 HCO 3 :K 2 CO 3 =1:2~3:1 (mass ratio). The pH value of the conversion solution was 6. CO in conversion fluid 3 2- The concentration is 0.5mol / L, and the desulfurization conversion liquid is heated to 20°C with a constant temperature water bath;

[0042] (3) full response...

Embodiment 2

[0046] A kind of waste lead-acid battery lead paste desulfurization conversion method of the present embodiment 2, its steps are:

[0047](1) Prepare the lead paste as it is

[0048] Decompose the waste lead-acid battery to take out the grid alloy, remove the lead paste from the grid, remove the sundries, dry it in an environment of 85°C, and grind it in a grinder for 20 minutes to obtain the lead paste with a particle size of 100 μm as it is;

[0049] (2) Configuration of desulfurization conversion agent

[0050] The desulfurization conversion agent is prepared as a conversion liquid, and the desulfurization conversion agent is Na 2 CO 3 , NH 4 HCO 3 and K 2 CO 3 mixture, and Na 2 CO 3 : NH 4 HCO 3 :K 2 CO 3 =1:3~4:1 (mass ratio). CO in conversion fluid 3 2- The concentration is 1.0mol / L, and the pH value of the conversion solution is 7. Heat the desulfurization conversion liquid to 70°C with a constant temperature water bath;

[0051] (3) full response

[0...

Embodiment 3

[0055] A kind of waste lead-acid storage battery lead paste desulfurization conversion method of the present embodiment 3, its steps are:

[0056] (1) Prepare the lead paste as it is

[0057] Decompose the waste lead-acid battery to take out the grid alloy, remove the lead paste from the grid, remove the sundries, dry it in an environment of 90°C, and grind it in a grinder for 30 minutes to obtain the lead paste with a particle size of 300 μm as it is;

[0058] (2) Configuration of desulfurization conversion agent

[0059] The desulfurization conversion agent is prepared as a conversion liquid, and the desulfurization conversion agent is Na 2 CO 3 , NH 4 HCO 3 and K 2 CO 3 mixture, and Na 2 CO 3 : NH 4 HCO 3 :K 2 CO 3 =1:5~6:1 (mass ratio). CO in conversion fluid 3 2- The concentration of the desulfurization conversion liquid is 1.5mol / L, the pH value of the conversion liquid is 9.5, and the desulfurization conversion liquid is heated to 90°C with a constant tem...