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Process method for treating solid waste containing copper and nickel

A technology of solid waste and process methods, applied in the direction of improving process efficiency, etc., can solve the problems of small furnace hearth area, large environmental pollution, environmental pollution, etc., to improve environmental pollution problems, reduce pollution such as flying dust, and improve regional environment Effect

Inactive Publication Date: 2009-12-09
杭州富阳申能固废环保再生有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in fact, because the source of the collected copper-containing and nickel-containing filter mud is very complicated, the composition is very different, and the metal grade is low. In the existing technical method, a small cupola smelting furnace and an open-air heap are used, and the disadvantage is the furnace hearth area. Smaller (0.5m 2 Left and right), without any dust collection device, the furnace gas is directly discharged from the furnace top, the output is low, the energy consumption is high, the recovery rate is low, the environmental pollution is large, and the smelting furnace charge is basically a high-grade charge, which is relatively simple
Open-air stacking results in large dust and dust, pollutes the environment, and causes serious heavy metal pollution in the region

Method used

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  • Process method for treating solid waste containing copper and nickel

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Embodiment 1

[0014] see figure 1 , because the solid waste has a high water content and a very fine particle size, in order to ensure the temperature in the environmental reduction smelting furnace, increase the gas permeability of the charge, and improve its bed energy rate, this part of the filter mud is input into the boiling heating furnace and the rotary kiln for drying. The drying temperature is 800°C, and then sent to the brick making machine through a belt conveyor to be pressed into a brick-shaped charge with a certain strength and particle size. The brick-shaped charge is a standard brick size of 240*115*53mm. Furnace charge. The heat source required for drying in the rotary kiln comes from the combustion of fine carbon powder produced during the crushing of fine carbon in the production process of the environmental protection reduction method. After drying, the moisture content of solid waste is reduced from 75 to 80% to below 25%. The smoke and dust generated in the rotary kil...

Embodiment 2

[0019] see figure 1 , because the solid waste has a high water content and a very fine particle size, in order to ensure the temperature in the environmental reduction smelting furnace, increase the gas permeability of the charge, and improve its bed energy rate, this part of the filter mud is input into the boiling heating furnace and the rotary kiln for drying. The drying temperature is 900°C, and then sent to the brick making machine by a belt conveyor to be pressed into a brick-shaped charge with a certain strength and particle size. Furnace charge. The heat source required for drying in the rotary kiln comes from the combustion of fine carbon powder produced during the crushing of fine carbon in the production process of the environmental protection reduction method. After drying, the moisture content of solid waste is reduced from 75 to 80% to below 25%. The smoke and dust generated in the rotary kiln are treated by bag filter and induced draft fan in turn and then empt...

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Abstract

The invention discloses a process method for treating solid waste containing copper and nickel, which is characterized in that: the solid waste is pretreated by a boiling rotary drying method to obtain a charging material; the charging material is subjected to reduction smelting by a reduction method; the reduction smelting comprises the following steps: adding carbon fuel into a reduction smelting furnace, melting the charging material by heat generated by combustion of the carbon fuel, and simultaneously forming carbon monoxide reduction atmosphere to reduce metallic oxides of copper or nickel; liquid copper or liquid nickel obtained by reduction melting passes through a casting ladle, and crude copper, crude nickel, copper matte or nickel matte is obtained; slag obtained by the reduction melting is subjected to water quenching treatment and then is recycled; and flue gas obtained by the reduction melting is recycled by an off-gas treating system. The process method changes the prior small cupola smelting furnace production technology which is out-dated for treating the solid waste, adopts harmless treatment technology, and greatly improves the problem of environmental pollution caused by small cupola furnace production; and the whole technological process is environment-friendly, and has low consumption and high recovery rate of the copper, the nickel and the like.

Description

technical field [0001] The present invention relates to a method for recovering valuable non-ferrous metals, in particular to a process for treating solid wastes containing copper and nickel. The solid wastes mainly come from filter mud etc. which are finally produced in the waste water treatment process of printed circuit board manufacturing enterprises. , The moisture content of the incoming plant is about 75-80%, and the main components are metals such as copper and nickel and inorganic substances such as quartz. Background technique [0002] With the rapid development of my country's national economy, the development of non-ferrous metal industry has provided support and greatly promoted the development of my country's electric power, transportation, construction, electronic information, national defense industry and other related industries as well as high-tech industries. Non-ferrous metal consumer countries occupy an important position in the international non-ferrous ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B5/10C22B15/00C22B23/02
CPCY02P10/20
Inventor 何庆仁孟军吴金宝
Owner 杭州富阳申能固废环保再生有限公司
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