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Method for producing silica white and lead sulfide with waste lead glass tubes as raw material

A technology of waste lead-containing glass and white carbon black, which is applied in the direction of lead sulfide, silicon oxide, silicon dioxide, etc., can solve the problems of difficult industrialization, and achieve large waste consumption, easy large-scale industrial production, and reaction conditions mild effect

Inactive Publication Date: 2013-06-26
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some technical bottlenecks and environmental problems in the current lead extraction method, and it is difficult to realize industrialization. It is urgent to develop a high-efficiency, low-energy, and clean lead extraction process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Step (1). The waste lead-containing glass tube is added to the jaw crusher for coarse crushing to obtain a coarsely crushed waste lead-containing glass with a diameter of 0.2 mm; then the coarsely crushed waste lead-containing glass is added to a planetary ball mill for fine grinding, The ball-to-material ratio is 3:1, the ball mill speed is 600 r / min, and the ball milling time is 60 minutes, to obtain 100-mesh finely ground waste lead-containing glass;

[0017] Step (2). 1kg of finely ground waste lead-containing glass was added to 5L of potassium hydroxide solution with a concentration of 10 mol / L, reacted at 80°C for 210min, and filtered to obtain leaching residue and lead and silicon leaching solution;

[0018] Step (3). Determine the lead ion concentration in the lead-containing and silicon leaching solution, add sodium sulfide to the lead-containing and silicon leaching solution in a molar ratio of Pb / S=1, and react at 60 ° C for 120 min to make the lead-containing...

Embodiment 2

[0021] Step (1). The waste lead-containing glass tube is added to the jaw crusher for coarse crushing to obtain coarsely crushed waste lead-containing glass with a diameter of 0.4 mm; then the coarsely crushed waste lead-containing glass is added to the planetary ball mill for fine grinding, The ratio of ball to material is 10:1, the speed of the ball mill is 500r / min, and the ball milling time is 200min to obtain 110 mesh finely ground waste lead glass;

[0022] Step (2). 1kg of finely ground waste lead-containing glass was added to 6L of potassium hydroxide solution with a concentration of 9mol / L, reacted for 200min at 90°C, and filtered to obtain leaching residue and lead-containing and silicon-containing leachate;

[0023] Step (3). Measure the lead ion concentration in the lead-containing and silicon leaching solution, add sodium sulfide to the lead-containing and silicon leaching solution in a molar ratio of Pb / S=1, and react at 62 ° C for 110 min, so that the lead-contai...

Embodiment 3

[0026] Step (1). The waste lead-containing glass tube is added to the jaw crusher for coarse crushing to obtain coarsely crushed waste lead-containing glass with a diameter of 0.5 mm; then the coarsely crushed waste lead-containing glass is added to the planetary ball mill for fine grinding, The ball-to-material ratio is 15:1, the ball mill speed is 400r / min, and the ball milling time is 150min to obtain 120-mesh finely ground waste lead-containing glass;

[0027] Step (2). 1kg of finely ground waste lead-containing glass was added to 8L of potassium hydroxide solution with a concentration of 8.5mol / L, reacted for 180min at 100°C, and filtered to obtain leaching residue and lead and silicon leaching solution;

[0028] Step (3). Measure the lead ion concentration in the lead-containing and silicon leaching solution, add sodium sulfide to the lead-containing and silicon leaching solution in a molar ratio of Pb / S=1, and react at 64 ° C for 105min, so that the lead-containing and s...

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Abstract

The invention discloses a method for producing silica white and lead sulfide with waste with lead glass tubes as a raw material, and aims at solving the problems of complicated technology, high energy consumption and easy generation of secondary pollution in the existing lead glass tube lead-extraction technologies. According to the method, firstly waste lead glass tubes are coarsely broken and fine ground to obtain fine ground waste lead glass, and then are added with a potassium hydroxide solution to react for 60-210 minutes under 80-200 DEG C, and leaching residues and lead-silicone contained leaching solution are obtained by filtration; the lead ion concentration in the lead-silicone contained leaching solution is measured, sodium sulfide is added inside based on the mol ratio of Pb / S=1 to react for 30-120 minutes under 60-80 DEG C, and lead sulfide and filtrate are obtained by filtration; the pH value of the filtrate is adjusted to 7-9 by carbon dioxide decomposition or adding acid liquid, so that gel is obtained and then is aged for 60-180 minutes and filtered, and silica white is obtained by drying the filter cake. The method has the advantages of modest reaction conditions, simple process flow, large waste consumption and the like, and is easily suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment, disposal and resource utilization, and particularly relates to a method for preparing white carbon black and lead sulfide by using waste lead-containing glass tubes as raw materials. Background technique [0002] Lead-containing glass has good optical properties, electrical conductivity, radiation resistance and machinability, and is widely used in energy-saving lamp stems, neon light outer tubes, neon light electrodes, picture tube electron gun outer tubes, neon bulbs, rice bulbs, flat bulbs, and automotive wicks. column etc. The lead glass of electric light source products is divided into three types according to the PbO content: light red dan (lead content about 11%) glass, medium red dan (lead content about 20%) glass and heavy red dan (lead content above 28%) glass. Due to the needs of glass processing, lead glass is used for the stems of incandescent lamps and various flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C01G21/21
Inventor 姚志通席永清张春晓张素玲
Owner HANGZHOU DIANZI UNIV
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