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Method for extracting metal lead and coproducing cement raw material from high-lead-content glass

A technology for extracting metal and cement raw materials, which is applied in the field of extracting metal lead and co-producing cement raw materials, can solve the problems of difficult industrialization, etc., and achieve the effects of large waste consumption, easy large-scale industrial application, and simple process flow

Active Publication Date: 2014-06-25
湖南良田水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many technical bottlenecks and environmental problems in the current lead extraction method, and it is difficult to realize industrialization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 40g of crystal glass to 800mL of sodium hydroxide solution with a concentration of 4mol / L, then add 113.09g of calcium chloride according to the molar ratio of Si:Ca=1:3, and react at 300°C for 5h; after the reaction, filter and separate, A solid residue and filtrate were obtained. The filtrate uses stainless steel as the cathode and anode materials, and the control voltage is 1.7V. Metal lead with a purity of 90.5% can be obtained on the cathode. SiO in crystal glass 2 The content is 51.02% and the particle size is 350 mesh.

Embodiment 2

[0015] Add 50g of anti-radiation glass to 200mL of sodium hydroxide solution with a concentration of 6mol / L, then add 44.89g of calcium carbonate according to the molar ratio of Si:Ca=1:1, and react at 140°C for 18h; after the reaction, filter and separate, A solid residue and filtrate were obtained. The filtrate uses stainless steel as the cathode and anode materials, and the control voltage is 1.5V. Metal lead with a purity of 97% can be obtained on the cathode. SiO in radiation-proof glass 2 The content is 53.90% and the particle size is 400 mesh.

Embodiment 3

[0017] Add 60g of lead-containing sealing glass to 360mL of sodium hydroxide solution with a concentration of 8mol / L, then add 103.27g of calcium sulfate according to the molar ratio of Si:Ca=1:1.5, and react at 160°C for 16h; filter after the reaction Separation gave a solid residue and filtrate. The filtrate uses stainless steel as the cathode and anode materials, and the control voltage is 1.5V. Metal lead with a purity of 95.5% can be obtained on the cathode. SiO in leaded sealing glass 2 The content is 50.64%, and the particle size is 500 mesh.

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Abstract

The invention discloses a method for extracting metal lead and coproducing a cement raw material from high-lead-content glass. The method comprises the following steps: adding high-lead-content glass into a 4-15 mol / L sodium hydroxide solution, adding an impurity remover so that the mole ratio of the Si ions in the high-lead-content glass to the metal ions in the impurity remover is 1:(0.9-3.0), and reacting at 120-300 DEG C for 5-20 hours; after the reaction is finished, filtering, and separating to obtain a solid residue and a filtrate; and by using stainless steel as the cathode and anode materials, electrolyzing at controlled voltage of 1.4-1.7V to obtain the metal lead with the purity of higher than 90% at the cathode. The method overcomes the defects of complex technique, high energy consumption and high tendency to generating secondary pollution in the existing lead extraction technique. The method has the advantages of high waste consumption, simple technical process, high lead extraction rate and the like, can coproduce the cement raw material, changes wastes into valuable substances, and can easily implement large-scale industrial application.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment and resource utilization, and in particular relates to a method for extracting metal lead from high lead-containing glass to co-produce cement raw materials. Background technique [0002] Leaded glass refers to glass containing glass formers such as silica and a relatively high content of lead oxide. Due to its good optical performance, electrical conductivity, radiation protection performance and processability, etc., it is widely used in the manufacture of electric vacuum glass, low temperature sealing glass, radiation protection glass, optical glass, high refraction bead glass and art vessel glass, etc. product. As an important leaded glass product, cathode ray tube (CRT) is widely used in electrical and electronic equipment such as televisions, computer monitors, and oscilloscopes. The CRT glass bulb is an important part of the display, accounting for about 60% of the total...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B13/00C04B7/24
CPCY02P10/20Y02P40/10
Inventor 姚志通黄进刚张素玲张春晓
Owner 湖南良田水泥有限公司
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