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Preparation method of zinc alloy applied to pressure casting
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The technology of zinc alloy and zinc ash is applied in the field of zinc alloy preparation for die casting, which can solve the problems of cost loss of die casting processing plant, decrease in quality of zinc alloy, harm to human health, etc., and achieve the effects of environmental protection, cost saving and excellent performance.
Inactive Publication Date: 2014-10-01
梁永忠
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[0005] In view of this, the purpose of the present invention is to propose a method for preparing zinc alloy for die-casting in which iron and nickel are removed, which solves the problem of the overall decline in the quality of zinc alloy caused by excessive harmful impurities in the prior art, endangering human health, and causing environmental pollution. Pollution and huge cost losses to die-casting processing plants
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Embodiment 1
[0041] see figure 1 , a method for preparing zinc alloy for die casting, comprising the following steps:
[0043] S2: assay, to determine whether the assay is qualified, if yes, proceed to step S3 for raw material melting, if not, proceed to step S9 for slag-liquid separation;
[0047] S6: Slag liquid is separated for the second time;
[0048] S7: test, determine whether the test is qualified, if yes, go to step S8 to cool the melt, if not, go to step S10 for waste liquid treatment;
[0049] S8: Melt cooling;
[0050] S9: Slag liquid separation, the separated zinc ash enters the above step S3, and the separated melt enters step S10 for waste liquid treatment;
[0051]S10: waste liquid treatment.
[0052] in:
[0053] S1 Zincash preparation refers to: put the zinc alloy slag recovered from the die-casting facto...
Embodiment 2 and Embodiment 3
[0070] The difference between Example 2 and Example 3 and Example 1 is that the temperatures in steps S1, S3, S5, S10-1, S10-2, and S10-3 are replaced by the temperatures shown in Table 2, respectively.
[0073] In the process of step S5, since the melting point of the zinc alloy for die casting is 382-386 degrees, proper temperature control is an important factor in controlling the composition of the zinc alloy. In order to ensure good fluidity of the alloy liquid, the temperature of the molten metal in the melting pot is 380-410°C.
[0074] If the temperature is too high can cause:
[0075] (1) Burning loss of aluminum and magnesium elements;
[0076] (2) The metal oxidation speed is accelerated, the burning loss is increased, and the zinc slag is increased;
[0077] (3) The thermal expansion will cause the stuck hammer head to fail;
[0078] (4) More iron elements are melted into t...
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Abstract
The invention discloses a preparation method of a zincalloy applied to pressure casting. The raw materials for preparing the zincalloy utilize wastes recycled from pressure casting factories and hardware factories, so that the cost is saved and environment is protected; zinc ash residue is used for precipitating a zinc alloy solution and separating impuritymetal elements such as nickel, iron and the like, and a remarkable separation effect is achieved, so that the content of the impuritymetal elements such as nickel, iron and the like is effectively reduced; carbon is used for further adsorbing and separating the impuritymetal elements such as nickel, iron and the like, and a remarkable separation effect is achieved, so that the mass content of the impurity metal elements such as nickel, iron and the like is effectively reduced. In the zinc alloy prepared by the method, the mass content of iron is not greater than 0.1% and the mass content of nickel is not greater than 0.02%.
Description
technical field [0001] The invention relates to a method for preparing a die-casting alloy, in particular to a method for preparing a zinc alloy for die-casting. Background technique [0002] Zinc is an important non-ferrous metal raw material. At present, zinc is second only to copper and aluminum in the consumption of non-ferrous metals; the metal has good calenderability, wear resistance and corrosion resistance, and can be made into physical and chemical properties with a variety of metals A more excellent alloy; zinc alloy refers to an alloy composed of zinc as the base and other elements. Generally, the components of zinc alloys for die casting include zinc, aluminum, copper, magnesium, nickel, iron, lead, cadmium, and tin, among which the effective alloying elements are aluminum, copper, and magnesium, and the harmful impurity elements are lead, cadmium, tin, iron, and nickel. Compared with other non-ferrous metal alloys, die-casting zinc alloy has obvious advantage...
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