Research progress in harmless treatment of chromium slag
Chromium slag is a dangerous solid waste,which mainly comes from the process of chromium and chromium salt production.It has the characteristics of complex composition and high toxicity,which needs to be treated harmlessly to alleviate the pollution to the surrounding environment.Introduced the present chromium salt production technology,analyzed the composition and related physicochemical char-acteristics of chromium slag produced by different chromium salt production processes in detail;combined with their mineral characteristics;listed the advantages and disadvantages of dry method,wet method,mi-crobial method,chromium slag curing/stabilizing detoxification treatment;summarized the advantages brought by the combination of process,like cost reduction,pharmaceutical utilization and other advanta-ges.This paper expounds the current key development direction of chromium slag——the optimization of reducing agent in the harmless treatment of chromium slag.Exploring the potential reducing capacity of waste in different industries realizes the new idea of"treating waste with waste".In order to explore an ef-ficient,green and inexpensive harmless treatment road of chromium slag.
calcination without calciumchromium saltharmless treatmentwaste treatment
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