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Method for treating nickel-chromium-contained hazardous waste through rotary kiln electric furnace (RKEF) process

A nickel-chromium and process technology, which is applied in the field of nickel-chromium-containing hazardous waste treatment, can solve problems such as poor economy, long treatment process, environmental hazards, etc., to achieve sustainable development, solve solid waste treatment problems, The effect of protecting the environment

Inactive Publication Date: 2018-09-14
GUANGDONG GUANGQING METAL TECH
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  • Abstract
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Problems solved by technology

[0003] One of the purposes of the present invention is to address the above-mentioned deficiencies and provide a method for treating hazardous waste containing nickel and chromium using the RKEF process, in order to solve the problem that the hazardous waste produced by the electroplating industry and aluminum profile enterprises in the prior art is more harmful to the environment. And its processing method has long technical process, poor economy and other technical problems

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  • Method for treating nickel-chromium-contained hazardous waste through rotary kiln electric furnace (RKEF) process

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Embodiment Construction

[0023] The present invention is further described below.

[0024] The present invention provides a method for treating nickel-chromium-containing hazardous waste by using the RKEF process. Now, the process of the present invention is described by taking production in a φ5×40m drying kiln, a φ4.4×100m rotary kiln, and a 33000KVA submerged arc furnace as examples. step:

[0025] (1) Store the recycled nickel-chromium-containing hazardous waste in the indoor wet ore yard, make a hard bottom and store it separately, and set up a canopy. At present, there are two types of aluminum alloy solid waste, and the sample composition table after drying is as follows:

[0026]

[0027] (2) Wet ore batching: The aluminum alloy hazardous waste is mixed into the laterite-nickel ore wet ore at a proportion of 5% on a dry basis; the aforementioned percentage is the percentage of the hazardous waste in the total mass of the nickel-chromium-containing hazardous waste and the laterite-nickel or...

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Abstract

The invention discloses a method for treating nickel-chromium-contained hazardous waste through the rotary kiln electric furnace (RKEF) process, and belongs to a treatment method for the nickel-chromium-contained hazardous waste. According to the method, the nickel-chromium-contained hazardous waste is mixed into laterite nickel ore wet ore, and the method comprises the steps of wet ore batching,wet ore drying, dry material batching, pre-reduction of a rotary kiln, reduction of an electric furnace and the like. The nickel-chromium-contained hazardous waste is economically utilized without harming the natural environment, the nickel-chromium-contained hazardous waste serves as a smelting raw material to be batched into the RKEF smelting process, the nickel-chromium-contained hazardous waste is modified and subjected to recycling economy utilization, valuable metal elements in the nickel-chromium-contained hazardous waste are recycled to the largest limit, the environment is protected,resources are saved, meanwhile, the good economic benefits can be created, the solid waste treatment problem of the aluminum profile electrophoresis industry is effectively solved, and sustainable development is achieved.

Description

technical field [0001] The present invention relates to a method for treating nickel-chromium-containing hazardous waste, more specifically, the present invention mainly relates to a method for treating nickel-chromium-containing hazardous waste by utilizing RKEF process. Background technique [0002] Solid waste is divided into general industrial solid waste, hazardous waste and domestic waste. General industrial solid waste includes aluminum slag, aluminum ash, scraps, etc., hazardous solid waste includes waste tank liquid, waste sludge and waste activated carbon, etc., and domestic waste includes waste packaging materials, food residues and office waste. Most of the solid wastes produced in the electroplating industry and aluminum profile enterprises during the production process and in the treatment of wastewater are hazardous wastes. If they are not strictly managed, they may cause irreversible harm to the environment. The electroplating industry and aluminum profile ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B5/02C22B4/06C22B23/02
CPCC22B4/06C22B5/02C22B7/001C22B23/023Y02P10/20
Inventor 何丛珍梁国燊田伟光陈彦虎徐佳林
Owner GUANGDONG GUANGQING METAL TECH
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