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Zinc amalgam particle and preparing process and usage thereof

A preparation process, zinc amalgam technology, applied in the field of zinc amalgam particles and its preparation, can solve the problems that amalgam is easy to generate mercury vapor, endanger human health, pollute the production site, etc., to protect the production environment and workers' personal safety, Effect of saving mercury source, saving time and cost

Active Publication Date: 2012-08-08
上海亚尔精密零件制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome that the existing method of preparing amalgam by melting drop method is easy to generate mercury vapor, which is harmful to human health, pollutes the production site, and uses oil as cooling medium, which takes a long time and affects the purity of amalgam , Degreasing and other defects must be carried out, a new process for preparing zinc amalgam and the zinc amalgam particles obtained by the process and its use are provided

Method used

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  • Zinc amalgam particle and preparing process and usage thereof
  • Zinc amalgam particle and preparing process and usage thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The zinc amalgam is formulated according to the mass ratio Zn:Hg=65:35 to produce 8 mg of zinc amalgam particles.

[0033] Accurately weigh 6.5kg of zinc flakes and 3.5kg of liquid mercury, and add them to a closed stainless steel container. The vessel was evacuated using a vacuum pump and then filled with argon inert gas. Melting was then performed by electric heating, and the temperature was set to 500°C. After the zinc and mercury in the container are completely melted, keep the internal temperature of the container at 450°C and the pressure at 20psi for 2 hours to make it fully mixed. Then by applying pressure, the pressure is controlled at 70psi, the alloy solution is extruded, and alloy droplets (0.5-2.0mm in diameter) are formed through the vibrating nozzle, and the vibration frequency and amplitude are controlled at 600Hz and 0.3mm, respectively. Pass liquid nitrogen into the hollow area between the inner tube and the outer tube in the double-layer casing, pas...

Embodiment 2

[0035] The zinc amalgam is formulated according to the mass ratio Zn:Hg=70:30 to produce 25 mg of zinc amalgam particles.

[0036] Accurately weigh 7kg of zinc flakes and 3kg of liquid mercury, and add them to a closed stainless steel container. The vessel was evacuated using a vacuum pump and then filled with argon inert gas. Melting was then performed by electric heating, and the temperature was set to 500°C. After the zinc and mercury in the container are completely melted, keep the internal temperature of the container at 500°C and 30psi for 3 hours to make it fully mixed. Then by applying pressure, the pressure is controlled at 100psi, the alloy solution is extruded, and alloy droplets (0.5-2.0mm in diameter) are formed through the vibrating nozzle, and the frequency and amplitude of the vibrating nozzle are controlled at 200Hz and 1mm, respectively. Pass liquid nitrogen into the hollow area between the inner tube and the outer tube in the double-layer casing, pass the ...

Embodiment 3

[0038] The zinc amalgam is formulated according to the mass ratio Zn:Hg=30:70 to produce 1 mg of zinc amalgam particles.

[0039]Accurately weigh 3kg of zinc flakes and 7kg of liquid mercury, and add them to a closed stainless steel container. The vessel was evacuated using a vacuum pump and then filled with argon inert gas. Melting was then performed by electric heating, and the temperature was set to 480°C. After the zinc and mercury in the container are completely melted, keep the internal temperature of the container at 480°C and 1 psi for 1 hour to make it fully mixed. Then by applying pressure, the pressure is controlled at 50psi, the alloy solution is pressed out, and alloy droplets (0.5-2.0mm in diameter) are formed through the vibrating nozzle, and the frequency and amplitude of the vibrating nozzle are controlled at 1000Hz and 0.1mm, respectively. Pass liquid nitrogen into the hollow area between the inner tube and the outer tube in the double-layer casing, pass th...

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Abstract

The invention discloses a preparing process of a zinc amalgam particle, which is characterized by including the following steps: (1) heating and fusing 30-70 wt% of zinc and 30-70 wt% of mercury in a sealed container in atmosphere of inert gases until zinc and mercury are mixed evenly to obtain an alloy solution; (2) in atmosphere of inert gases, preparing the alloy solution into alloy drops with diameters of 0.5-2.0 mm; (3) indirectly cooling inert gas current through liquid and condensing the alloy drops by aid of the cooled inert gas current at temperature of -150 DEG C to -190 DEG C; and (4) conducting steady-state processing on the condensed alloy drops at temperature of 0 DEG C to 15 DEG C and humidity of 20-40% relative humidity (RH) in atmosphere of inert gases to obtain the zinc amalgam particle. The invention further discloses the zinc amalgam particle prepared through the preparing process and usage of the zinc amalgam particle. The preparing process reduces secondary pollution and simultaneously omits the subsequent degreasing step, the zinc amalgam particle effectively controls mercury vapor pressure, mercury pouring amount can be accurately controlled, and mercury resources can be saved to the maximum limit.

Description

technical field [0001] The invention relates to a solid amalgam material, in particular to a zinc amalgam particle, a preparation method and application thereof. Background technique [0002] Mercury is an indispensable working substance in fluorescent lamps. A lot of practice has shown that: only when mercury releases ultraviolet rays of a specific wavelength of 253.7nm, fluorescent lamps can obtain the highest luminous efficiency, and the optimum vapor pressure value for obtaining ultraviolet rays is Ph=0.8 Pa. As the temperature increases, the mercury vapor pressure also increases, and more UV radiation is self-absorbed by the mercury, thereby reducing lamp efficacy and reducing light output. [0003] The traditional fluorescent lamp manufacturing process is to introduce liquid mercury. Since the amount of mercury cannot be accurately controlled when injecting liquid mercury, the mercury content in the lamp is too much. cause more pollution. [0004] At present, it is ...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F1/00C22C7/00C22C18/00
Inventor 何健荣盛誉顾峰毅顾新颜
Owner 上海亚尔精密零件制造有限公司
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