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Treatment method of heavy-metal-containing river bottom mud

A technology for river sediment and treatment methods, which is applied in mineral processing, metallurgy, and environmental protection fields. It can solve problems such as hidden environmental pollution, waste of resources, and occupation of a large amount of land or other space, and achieve the effect of simple process and less dosage of chemicals.

Inactive Publication Date: 2017-12-26
云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment methods for river sediment include traditional treatment technology (concentration, digestion, natural drying, mechanical dehydration, disinfection, etc.), sanitary landfill disposal technology, ocean disposal, composting treatment technology, thermal drying and incineration treatment technology, etc. , these treatment technologies only store the sediment in different places, but do not reduce or recycle it. To a certain extent, they occupy a large amount of land or other space, and there are hidden dangers of environmental pollution. At the same time, heavy metals in the river sediment cannot being reused, resulting in a waste of resources

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  • Treatment method of heavy-metal-containing river bottom mud
  • Treatment method of heavy-metal-containing river bottom mud
  • Treatment method of heavy-metal-containing river bottom mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of processing method that contains heavy metal river channel bottom mud described in the present embodiment, such as figure 1 As shown, the specific steps are as follows:

[0021] (1) Take 500g of river bottom mud and place it in an ultrasonic oscillator for shock treatment to emulsify it for 2 minutes;

[0022] (2) Add the emulsified river bottom mud obtained in step (1) into the flotation tank, and stir for 3 minutes;

[0023] (3) The uniformly stirred system of step (2) is subjected to mixed flotation. The mixed flotation process is one roughing and one selection, and the dosage of one roughing agent is collector 20g / t, foaming agent 10g / t, fine No agent is selected, and a mixed concentrate is obtained by one-time selection. The mixed concentrate is subjected to acid leaching-electrolysis treatment to obtain a metal alloy. The acid leaching time is 16 hours. The content of heavy metals is tested and analyzed, and the tailings are used to make porous material...

Embodiment 2

[0028] A kind of treatment method that contains heavy metal river channel bottom mud described in the present embodiment, concrete steps are as follows:

[0029] (1) Take 500g of river bottom mud and place it in an ultrasonic oscillator for shock treatment to emulsify it for 2 minutes;

[0030] (2) Add the emulsified river bottom mud obtained in step (1) into the flotation tank, and stir for 3 minutes;

[0031] (3) The uniformly stirred system in step (2) is subjected to mixed flotation. The mixed flotation process is one roughing and one selection. No agent is selected, and a mixed concentrate is obtained by one-time selection. The mixed concentrate is subjected to acid leaching-electrolysis treatment to obtain a metal alloy. The acid leaching time is 24 hours. The content of heavy metals is tested and analyzed, and the tailings are used to make porous materials and ecological restoration materials to achieve the purpose of maximizing resource utilization.

[0032] The resu...

Embodiment 3

[0036] A kind of treatment method that contains heavy metal river channel bottom mud described in the present embodiment, concrete steps are as follows:

[0037] (1) Take 500g of river bottom mud and place it in an ultrasonic oscillator for shock treatment to emulsify it for 2 minutes;

[0038] (2) Add the emulsified river bottom mud obtained in step (1) into the flotation tank, and stir for 3 minutes;

[0039] (3) The uniformly stirred system of step (2) is subjected to mixed flotation. The mixed flotation process is one roughing and one selection. No agent is selected, and a mixed concentrate is obtained by one-time selection. The mixed concentrate is subjected to acid leaching-electrolysis treatment to obtain a metal alloy. The acid leaching time is 36 hours. The content of heavy metals is tested and analyzed, and the tailings are used to make porous materials and ecological restoration materials to achieve the purpose of maximizing resource utilization.

[0040] The resu...

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Abstract

The invention discloses a treatment method of heavy-metal-containing river bottom mud. The content of various kinds of heavy metal in bottom mud exceeds standard; the content of the heavy metal in the bottom mud is reduced, so that the environment protection standard is reached; valuable heavy metal with greater content (the Cu, Ni, Pb and Zn contents are 2632.59mg / kg, 132.86mg / kg, 1680.53mg / kg and 96.53mg / kg) are recovered and utilized again. Firstly, the river bottom mud is subjected to ultrasonic oscillation so that the bottom mud is emulsified; then, the valuable heavy metal is separated out by a mixed flotation method; the mixed flotation flow process includes once rough selection and once fine selection; a collecting agent selected by the rough selection is multiplex xanthate (HKY-1), and the consumption is 20g / t to 80 / t; a foaming agent is terpenic oil, and the consumption is 10g / t to 50 / t. Mixed flotation rough concentrate is subjected to once fine selection and purification to obtain mixed concentrate; the mixed concentrate is treated by an acid leaching-electrolysis method to obtain metal alloy; the acid leaching time is 16h to 36h. The content of heavy metal in mixed flotation tailings reaches the environment protection requirement; the tailings can be used for manufacturing porous materials, ecological restoration materials and the like; the goal of resource utilization maximization is reached.

Description

technical field [0001] The invention relates to a treatment method for river bottom mud containing heavy metals, and relates to the fields of environmental protection, ore dressing and metallurgy. Background technique [0002] With the large amount of industrial wastewater and domestic sewage discharged into the river, the sediment of the river is seriously polluted and the composition is complex. Generally, what is mainly composed of inorganic substances is called "sediment", which is in the form of large particles, is easy to dehydrate, does not corrode and has poor fluidity. The organic matter as the main component is called "sludge", such as the remaining sludge of sewage treatment plants. According to different treatment methods and stabilization degrees, sludge can also be divided into biological sludge, cooked sludge, chemical sludge, etc. Different types of sludge have quite different properties and characteristics, and the final treatment and disposal measures ado...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C22B7/00C25C1/24C02F101/20
CPCC02F11/00C02F11/006C02F2101/20C02F2103/007C22B7/007C25C1/24Y02P10/20
Inventor 吴文卫段怡君赵海光杨子轩于站良
Owner 云南省环境科学研究院(中国昆明高原湖泊国际研究中心)