Method for preparing high sodium carbonate type lead carbonate by utilizing lead-containing fly ash

Abstract

The invention provides a method for preparing high sodium carbonate type lead carbonate by utilizing lead-containing fly ash. The method comprises the following steps: dissolving the lead-containing fly ash in a sulfuric acid solution, stirring, filtering and then collecting filter residue; adopting a mixed solution of sodium chloride and calcium chloride for leaching the collected filter residue,thereby acquiring rough lead chloride; refining the acquired rough lead chloride, thereby acquiring high-purity refined lead chloride; converting by dissolving the acquired refined lead chloride intoa sodium carbonate solution, thereby acquiring sodium carbonate type lead carbonate; drying, thereby acquiring an end product of sodium carbonate type lead carbonate. Compared with the prior art, theinvention has the advantages that the lead-containing fly ash is used as the raw material for producing the high sodium carbonate type lead carbonate, the performance meets the chemical industry standard 'basic lead carbonate' HG / T 4835-2015, a reference is supplied for the recycling of lead-containing solid wastes, such as lead slag (ash), the comprehensive utilization of lead-containing fly ashresource is expanded and the additional value of the lead-containing fly ash resource is increased.

Description

technical field

[0001] The invention belongs to the field of comprehensive utilization of metallurgical resources, and in particular relates to a method for preparing high-purity lead carbonate by using lead-containing dust. Background technique

[0002] With the continuous and rapid growth of my country's economy, the consumption of lead has also increased significantly. According to relevant reports, China is the country with the largest consumption of refined lead in the world. The average growth rate of lead consumption between 2006 and 2011 was 25.2%, which was much higher than the global average. In 2011, China's refined lead consumption was as high as 4.005 million tons (accounting for 41.8% of the world's total consumption). The application of lead in my country mainly includes lead-acid batteries, lead materials, lead alloys and lead oxides. As my country moves towards a moderately developed country, the demand for lead in the storage battery and dry battery indust...

Examples

Embodiment 1

[0035] A kind of method that utilizes lead-containing dedusting ash to produce high purity lead carbonate, comprises the following steps:

[0036] 1), the main components and particle size distribution of the lead-containing dust removal ash used are shown in Table 1 and Table 2. Take 200g of lead-containing dust removal dust and add it to 700mL of sulfuric acid solution with a concentration of 150g / L, heat it to 65°C and keep it warm. Then stir and react for 30 minutes under the condition of stirring at 300r / min. After the reaction is complete, filter, collect the filtrate and filter residue respectively, dry the filter residue at 110°C, and analyze the chemical composition. The test results are shown in Table 3;

[0037] 2), preparation concentration is 200mL of sodium chloride solution of 180g / L, adds 12g industrial calcium chloride in the prepared sodium chloride solution, it is mixed with sodium chloride and calcium chloride mixed solution, will prepare Put the mixed solu...

technical field

[0001] The invention belongs to the field of comprehensive utilization of metallurgical resources, and in particular relates to a method for preparing high-purity lead carbonate by using lead-containing dust. Background technique

[0002] With the continuous and rapid growth of my country's economy, the consumption of lead has also increased significantly. According to relevant reports, China is the country with the largest consumption of refined lead in the world. The average growth rate of lead consumption between 2006 and 2011 was 25.2%, which was much higher than the global average. In 2011, China's refined lead consumption was as high as 4.005 million tons (accounting for 41.8% of the world's total consumption). The application of lead in my country mainly includes lead-acid batteries, lead materials, lead alloys and lead oxides. As my country moves towards a moderately developed country, the demand for lead in the storage battery and dry battery indust...

Examples

Embodiment 1

[0035] A kind of method that utilizes lead-containing dedusting ash to produce high purity lead carbonate, comprises the following steps:

[0036] 1), the main components and particle size distribution of the lead-containing dust removal ash used are shown in Table 1 and Table 2. Take 200g of lead-containing dust removal dust and add it to 700mL of sulfuric acid solution with a concentration of 150g / L, heat it to 65°C and keep it warm. Then stir and react for 30 minutes under the condition of stirring at 300r / min. After the reaction is complete, filter, collect the filtrate and filter residue respectively, dry the filter residue at 110°C, and analyze the chemical composition. The test results are shown in Table 3;

[0037] 2), preparation concentration is 200mL of sodium chloride solution of 180g / L, adds 12g industrial calcium chloride in the prepared sodium chloride solution, it is mixed with sodium chloride and calcium chloride mixed solution, will prepare Put the mixed solu...

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