Novel process for separating silver-zinc-bismuth materials

Abstract

The invention discloses a novel process for separating silver-zinc-bismuth materials, and relates to the technical field of nonferrous metallurgy. The novel process comprises the following steps: S1,gold and silver leaching; S2, sodium carbonate bismuth precipitation; S3, sodium carbonate zinc precipitation; and S4, alkali washing dechlorination. According to the novel process for separating thesilver-zinc-bismuth materials, silver-zinc-bismuth slag produced in the bismuth refining, zinc adding and silver removing process returns to a reverberatory furnace in a traditional process, zinc is not recycled in an open circuit mode, bismuth and silver enter a front-section system again, the production cost is increased, silver, bismuth and zinc are separated through a wet method, silver is made into silver chloride and enters a silver converter, bismuth is made into wet bismuth oxide, and zinc is made into zinc carbonate to achieve the purposes of separation and recovery; and the novel process for separating silver-zinc-bismuth materials is designed, zinc is made into zinc carbonate to be directly recycled in an open circuit mode, silver is made into silver chloride to be directly fedinto the silver converter, bismuth is made into wet bismuth oxide, and the purposes of separation and recovery and reducing production cost are achieved.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal metallurgy, in particular to a new process for separating silver, zinc and bismuth materials. Background technique [0002] Non-ferrous metals in the narrow sense are also called non-ferrous metals, which is a general term for all metals except iron, manganese and chromium. Non-ferrous metals in a broad sense also include non-ferrous alloys. A non-ferrous alloy is an alloy composed of a non-ferrous metal as a base (usually more than 50%) and adding one or several other elements. Non-ferrous metals generally refer to all metals except iron (and sometimes manganese and chromium) and iron-based alloys. Non-ferrous metals can be divided into heavy metals (such as copper, lead, zinc), light metals (such as aluminum, magnesium), precious metals (such as gold, silver, platinum) and rare metals (such as tungsten, molybdenum, germanium, lithium, lanthanum, uranium). Metallurgy is the process an...

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a new process for separating silver-zinc-bismuth materials, which solves the problem of silver-zinc-bismuth slag produced by adding zinc and removing silver in the bismuth refining production process proposed in the above-mentioned background technology. The traditional process is Return to the reverberatory furnace, so that the zinc is not directly recovered in an open circuit, and the silver and bismuth enter the front-end production system, which increases the problem of production costs

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