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Manufacturing method of lead brass extracted from valve waste copper

A manufacturing method and lead-brass technology, applied in the direction of improving process efficiency, can solve the problems of reducing recovery rate, complex structure and high recovery cost, and achieve the effects of large internal defects, high oxide content and high recycling cost.

Pending Publication Date: 2018-06-15
NINGBO HUACHENG VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, a large number of high-performance lead-brass valves in the prior art are small in size, complex in structure, and difficult to clean in the hole. Conventional methods have high recycling costs and low recovery rates. There are few related technologies specifically for their recycling.
The waste copper recovery in the prior art generally adopts mechanical means to clean the surface and then directly recycles it. On the one hand, the recovery rate is greatly reduced, and on the other hand, the performance of lead brass valves after long-term use decreases significantly, and the surface is corroded, oxidized and desquamated. , internal fatigue, micro-cracks, etc. a large number of accumulations, the reuse value is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of lead brass extracted from waste copper of valves, which has the same weight and chemical composition as the original valves when new.

[0029] The above-mentioned manufacturing method of the lead brass extracted from valve copper scrap comprises the following steps:

[0030] 1) Preparation before production

[0031] ①Preparation of raw materials for extraction: prepare a sufficient amount of aluminum powder with a diameter of 1 μm and a sufficient amount of metal zinc;

[0032] ②Equipment and tooling preparation: Prepare abrasive flow deburring equipment, acidity meter, recovery tank with built-in mechanical stirring device and inner surface protected by PVC film sealing, vacuum electroslag remelting equipment, set at the bottom of the recovery tank and cover the area Recover the tray with 2 / 3 of the bottom area of ​​the tank, which is made of tetrafluoroethylene;

[0033] ③ Auxiliary raw material preparation: a sufficient amount of Bacillus thuringiensis im...

Embodiment 2

[0049] The whole is consistent with Example 1, the difference is:

[0050] The above-mentioned manufacturing method of the lead brass extracted from valve copper scrap comprises the following steps:

[0051] 1) Preparation before production

[0052] ①Preparation of raw materials for extraction: prepare a sufficient amount of aluminum powder with a diameter of 2 μm and a sufficient amount of metal zinc;

[0053] ③Auxiliary raw material preparation: a sufficient amount of Bacillus thuringiensis implanted with a concentration of 5×10 in terms of sludge mass 5 cfu / g-8×10 5 cfu / g of Walter's halophilic bacteria, concentration 5×10 4 cfu / g-7×10 5 cfu / g of Halobacterium salina, total concentration 1×10 7 cfu / g-3×10 7 cfu / g of the Qingdao Lake deep bottom silt, 2216E agar medium, potassium permanganate solution with a solute mass fraction of 3% of the bacteria belonging to the genus Qingdao Lake;

[0054] 2) Cultivation of reducing microorganisms

[0055] ① Evenly brush the de...

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Abstract

The invention discloses a manufacturing method of lead brass extracted from valve waste copper. The lead brass extracted from the valve waste copper is equivalent in weight and chemical component in new manufacturing of an original valve; reduction and purification are performed mainly through microbial activities after surface cleaning; then, electric slag is remolten in vacuum; and finally, recovery is performed. The lead brass extracted from the valve waste copper is higher in recovery rate; and the recovered lead brass is high in quality, convenient to recover, low in cost and wide in application range.

Description

technical field [0001] The invention relates to the field of scrap metal recycling, in particular to lead brass extracted from valve scrap copper and a manufacturing method thereof. Background technique [0002] Metal recycling refers to the useful substances separated from scrap metals that are physically or mechanically processed into recycled products. It is an industrial chain from recycling, dismantling, and recycling. The metal recycling industry has formed a complete industrial chain and recycling ecosystem, which is of great significance to the effective utilization of resources. [0003] However, a large number of high-performance lead-brass valves in the prior art are small in size, complex in structure, and difficult to clean in the hole. Conventional recycling costs are high and the recovery rate is low. There are few related technologies specifically for recycling them. The waste copper recovery in the prior art generally adopts mechanical means to clean the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/18C22B15/00C22B13/00C22B13/02
CPCC22B3/18C22B7/003C22B7/006C22B13/025C22B13/045C22B15/0028C22B15/0065Y02P10/20
Inventor 王朝阳连超燕杨月红彭兴满汤法阳戴春光
Owner NINGBO HUACHENG VALVE
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