Metallurgical chemical solid waste recycling system and method thereof

Abstract

The invention discloses a metallurgical chemical solid waste recycling system and a method thereof. The metallurgical chemical solid waste recycling system comprises a drier, a separator, a proportioning machine, a mixer, a ball forming machine, pre-reduction equipment, a recycling electric furnace, a modulating electric furnace and an AOD refining furnace. The metallurgical chemical solid waste recycling system disclosed by the invention has the main beneficial effects that (1) the recycling electric furnace can recycle gas; materials are thermally charged into the furnace; molten iron is thermally mixed and refined; the equipment is high in mechanization degree and automation degree; the wastes are subjected to complete harmless treatment; the yield of each machine is high; the comprehensive energy consumption of production is low; and the metallurgical chemical solid waste recycling system is suitable for industrial production; (2) the produced products are alloy materials containing metal elements such as nickel, chromium and copper; the product quality can be regulated and controlled according to relevant standards and the customer requirements; high-quality products with different specifications can be produced; the products are widely applied; and the additional value is high; and (3) the recycle rate of the valuable metal elements in the wastes is high; resources are fully utilized; and good economical benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of environmental engineering treatment and comprehensive utilization of resources, and in particular relates to metallurgical and chemical solid wastes containing nickel, copper, chromium, zinc and other valuable metal element wastes produced in the production process of stainless steel production enterprises and electroplating, chemical and other industries Resource utilization system and method thereof. Background technique [0002] The environment is the basis for the survival of human society. In the past 10 years, with the development of resources, my country's economy has developed rapidly. At the same time, the natural environment has also been greatly damaged, especially the pollution of the environment by industrial solid waste Seriously restrict the sustainable development of the economy. [0003] In recent years, the state has put forward the goals of harmlessness, reduction, and recycling of industrial sol...

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Problems solved by technology

[0007] 1. The recovery rate of metal elements is low, especially the recovery rate of nickel and copper is only 70%, which is a big waste of resources;

[0008] 2. Due to the mixed treatment of electroplating sludge (containing copper and nickel) and stainless steel sludge to produce nickel-chromium-iron alloy products, the copper element does not meet the requirements of nickel-chromium-iron alloy products after entering the alloy, and the copper element cannot be valued, resulting in no copper element. Reasonable utilization, low added value of the product;

[0009] 3. Because waste is different from ore, it generally contains high levels of harmful substances such as sulfur and phosphorus, especially electroplating sludge and stainless steel sludge after smelting in submerged arc furnaces. Carbon refining facilities, therefore, cannot guarantee the quality of the produced Inconel products to meet the relevant standards and customer requirements

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