Method for recycling metal resources from dangerous solid wastes

The invention provides a method for recycling metal resources from dangerous solid wastes. The method comprises following steps: the dangerous solid wastes are subject to sulfuric acid dissolving, and after solid-liquid separation, calcium sulfate is obtained; a first solution obtained during sulfuric acid dissolving is subject to electrolysis, and electrolytic copper is obtained; iron powder is added into a second solution obtained during electrolysis to replace residual copper to make sponge copper, a third solution obtained during replacement is sufficiently aerated, and nickel carbonate is used for adjusting pH to make Fe(OH)3; a fourth solution obtained during Fe(OH)3 making is concentrated and cooled to obtain nickel sulfate; the Fe(OH)3 is subject to multistage washing, sulfuric acid is added, heating is carried out, and ferric trichloride is made; a fifth solution obtained in the process of ferric trichloride making returns to the sulfuric acid dissolving link to be circularly used; the treatment technology for recycling the dangerous solid wastes is simple, free of pollution, multiple in metal, high in value and environment-friendly.