Method for curing lead in fouling acid slag

A technology of polluted acid slag and magnesium slag, applied in the removal of solid waste and other directions, can solve the problems of waste of resources and water pollution of Xiangjiang River, and achieve the effects of low production cost, easy engineering implementation and simple solidification process.

Inactive Publication Date: 2014-11-12
BEIFANG UNIV OF NATITIES
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Problems solved by technology

This has led to serious pollution of the water body of the Xiangjiang River and a great waste of resources, especially the piled up solid waste such as heavy metal polluted acid waste residues. The storage yard covering an area of ​​nearly 100 acres is shocking. There are major safety hazards, and there is an urgent need to develop reduction and harmless treatment. use of industrial technology

Method used

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  • Method for curing lead in fouling acid slag
  • Method for curing lead in fouling acid slag
  • Method for curing lead in fouling acid slag

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Experimental program
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Effect test

Embodiment 1

[0022] The modified (metal) magnesium slag in the following raw materials is the magnesium smelting slag of Ningxia Huiye Magnesium Industry Group Co., Ltd., and the polluted acid slag is the slag of the lead-zinc smelting enterprise (Zhuzhou Smelting Group Co., Ltd.).

[0023] Chemical composition of polluted acid slag (%)

[0024]

[0025] Chemical composition of modified magnesium slag (%)

[0026]

[0027] First, use the jaw crusher model HF-ZY-EPX to crush the polluted acid slag and modified magnesium slag, put them into the sealed sample preparation grinder model HFZY-B3 for dry grinding, and grind them to a particle size of 40 Mesh, and then fully mixed the modified magnesium slag and the dirty acid slag in a weight ratio of 6:4 to obtain a mixture with a total mass of 5Kg.

[0028] Add Pb(NO 3 ) 2 Mix the saturated solution of Pb so that the mass fraction of Pb in the mixture reaches 1%.

[0029] Then bake at 105°C for 24 hours, and use a universal hydraulic ...

Embodiment 2

[0032] The dirty acid slag and magnesium slag are mechanically ground to a particle size below 40 mesh; the magnesium slag and the dirty acid slag are mixed in a weight ratio of 6:4, and a mixture with a total mass of 5Kg is prepared. A certain amount of Pb(NO 3 ) 2 The saturated solutions were mixed to achieve a Pb content of 0.48% in the mixed sample. Dry at 105°C and press into shape. Sinter at a temperature of 900°C, hold for 2 hours, and cool naturally. The solidified polluted acid slag can be processed as a resource.

[0033] According to GB5085.3-2007 and HJ / T299-2007, the leaching results are: before curing, the leaching result of Pb is ≥6.02 mg / L, and after curing, the Pb is 0.005 mg / L.

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Abstract

The method relates to a method for curing lead in fouling acid slag. The method is characterized by comprising the following steps that modified magnesium metal slag is added to the fouling acid slag after drying and grinding first, the modified magnesium metal slag and the fouling acid slag are mixed uniformly and then briquetted, and the obtained briquettes are placed in a sintering furnace for heat preservation under the temperature of 500-900 DEG C for 0.5-6 hours and are cooled and taken out. The method is a clean environmental protection treatment method for curing heavy metal Pb in the fouling acid slag, the modified magnesium slag of curing agents is magnesium metal smelting reducing slag, the purpose of waste control by waste is achieved, and therefore cost is low. The curing process for the fouling acid slag is simple, expensive materials are not used, and a project is easy to implement, so that industrialized operation is achieved; secondary waste slag, waste water and waste gas are not generated in the curing process, and the method can be implemented under safe and environment-friendly conditions.

Description

technical field [0001] The invention relates to a method for solidifying lead in polluted acid slag. Background technique [0002] Non-ferrous metal smelting is a heavily polluting industry that plays a pivotal role in my country's economic development. However, the long-term accumulation of waste residues in the non-ferrous metal smelting industry has led to serious pollution of groundwater, posing major safety hazards, and severely restricting the sustainable development of the non-ferrous metal industry. Two types of society" construction. [0003] The lead and zinc industry is an important representative of non-ferrous metal smelting in my country. The bulk industrial solid waste in my country's lead and zinc industry mainly comes from metallurgical slag and acidic water treatment slag (polluted acid slag), and the annual industrial waste slag is estimated to exceed 6 million tons. Taking Zhuzhou Qingshuitang Industrial Zone as an example, various industrial wastes disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
Inventor 吴澜尔韩凤兰陈玉洁
Owner BEIFANG UNIV OF NATITIES
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