Comprehensive benefit evaluation of zinc oxide enrichment regeneration for zinc smelting

Evaluation of the regeneration benefit of zinc oxide enrichment for zinc smelting is of great significance for promoting rational planning of the utilization of regenerated zinc resources and supporting scientific decision-making of environmental management. Based on the survey results of domestic enterprises, an evaluation index system for the comprehensive benefits of zinc oxide enrichment regeneration was established, considering economic, resource, environmental and social factors, where comprehensive weights were obtained by applying the analytic hierarchy process (AHP) and CRITIC method for weighting, and the standard cloud divided by the golden section method was modified. Then a comprehensive benefit evaluation model based on the combination weighting method and cloud model was constructed. After that, a lead-zinc metal company in Jiangxi Province was used as a case study. The results showed that the comprehensive benefit level of the company's zinc production from zinc oxide enrichment regeneration was at a high level. Regarding the first-level factors, the resource benefit was at the highest level; the environmental, social and economic benefits were at the second high level, and the evaluation results of environmental and social benefits were more uncertain. The fuzziness and randomness were considered in the process of evaluation, which provided more comprehensive evaluation information of the regeneration benefit of zinc oxide enrichment for zinc smelting.