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Compatibility process of hazardous waste materials and treatment process of hazardous waste materials

A material and process technology, applied in the field of hazardous waste treatment, can solve the problems of non-compliance with waste management, cement kiln crusting, lack of efficient and accurate compatibility processes, etc.

Active Publication Date: 2021-10-01
ZHAOQING FEINAN METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of environmental risk control, co-processing of hazardous waste in cement kilns is not the best feasible solution
Because the co-processing of fly ash in cement kiln has the following defects: (1) When the content of chlorine, sulfur and other elements in hazardous waste is high, it will cause "skinning" of cement kiln, and strict pretreatment or compatibility must be carried out before entering the cement kiln
(2) Co-processing of hazardous waste in cement kilns. Most of the highly toxic heavy metals such as lead and cadmium volatilize into the flue gas during the cement calcination process. Most of the lead and cadmium in the flue gas are captured into the kiln dust, but the cement The kiln dust of the kiln is not managed as waste, but returned to the kiln for recalcination or directly mixed with cement clinker to become a part of the cement product, which essentially disperses and dilutes heavy metals into the cement product, increasing its slow growth rate. Environmental Release Risk
[0006] At present, the compatibility process of hazardous waste metallurgical furnace and kiln disposal is still largely based on the traditional pyrometallurgical process, but the composition of hazardous waste raw materials is complex. At present, it is mainly based on the experience and calculation of metallurgical engineers, and there is still a lack of efficient and accurate compatibility process

Method used

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  • Compatibility process of hazardous waste materials and treatment process of hazardous waste materials
  • Compatibility process of hazardous waste materials and treatment process of hazardous waste materials

Examples

Experimental program
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Effect test

Embodiment 1

[0055] This embodiment provides a compatibility process and treatment process for hazardous waste materials, including:

[0056] Obtain the known parameters of hazardous waste materials and auxiliary materials, known parameters include the physical and chemical properties and component content of hazardous waste materials and auxiliary materials.

[0057] According to the known parameters of hazardous waste materials and auxiliary materials and the preset alkalinity, alkali metal content, reducing agent dosage ratio, magnesium content, aluminum content, calorific value, halogen content, chromium content and phosphorus content of the target material to determine the hazardous waste materials and Compatibility of accessories.

[0058] Among them, the alkalinity is 0.7;

[0059] The alkali metal content is {m[in (Na 2 O) meter] / m[∑(basic oxide+acidic oxide)]}×100% is 5%;

[0060] The magnesium content is {m[(MgO)] / m[∑(basic oxide + acidic oxide)]}×100% is 3%;

[0061] The alu...

Embodiment 2

[0070] This embodiment provides a compatibility process and treatment process for hazardous waste materials, including:

[0071] Obtain the known parameters of hazardous waste materials and auxiliary materials, known parameters include the physical and chemical properties and component content of hazardous waste materials and auxiliary materials.

[0072] According to the known parameters of hazardous waste materials and auxiliary materials and the preset alkalinity, alkali metal content, reducing agent dosage ratio, magnesium content, aluminum content, calorific value, halogen content, chromium content and phosphorus content of the target material to determine the hazardous waste materials and Compatibility of accessories.

[0073] Among them, the alkalinity is 1.5;

[0074] The alkali metal content is {m[in (Na 2 O) meter] / m[∑(basic oxide+acidic oxide)]}×100% is 10%;

[0075] The magnesium content is {m[(MgO)] / m[∑(basic oxide + acidic oxide)]}×100% is 12%;

[0076] The a...

Embodiment 3

[0085] This example provides a compatibility process and treatment process for hazardous waste materials. The difference from Example 1 is that the halogen content of the target material is: the sum of the mass percentages of chlorine and bromine in the target material is 8.5%. First, lead and zinc are added to the compatible materials, and the amount of lead and zinc added is: n(Pb)+n(Zn)=0.75∑n(Cl+Br). And carry out dehalogenation pretreatment with special metallurgical kiln, the mass percentage sum of chlorine and bromine in the material after pretreatment is reduced to 1.5%, then carry out secondary compatibility with embodiment 1, add other auxiliary materials and carry out metallurgical kiln smelting , The temperature of metallurgical kiln smelting treatment is 1200 ℃ ~ 1400 ℃.

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Abstract

The application relates to a hazardous waste material compatibility process and a hazardous waste material treatment process, belonging to the technical field of hazardous waste treatment. The compatibility process of hazardous waste materials is based on the known parameters of hazardous waste materials and auxiliary materials, as well as the preset alkalinity, alkali metal content, reducing agent dosage ratio, magnesium content, aluminum content, calorific value, halogen content, chromium content and The phosphorus content is limited, so that after the compatible materials are processed, such as smelting in a metallurgical furnace, the harmless disposal and resource utilization of hazardous waste can be realized.

Description

technical field [0001] This application relates to the technical field of hazardous waste treatment, and in particular to a hazardous waste material compatibility process and a hazardous waste material treatment process. Background technique [0002] Hazardous waste comes from chemical, pharmaceutical, manufacturing, printing and dyeing, metallurgy and other industries, and its nature is complex and changeable. With the rapid economic development, the generation of hazardous waste has increased dramatically. Among the current hazardous waste disposal technologies, there are mainly many methods such as landfill, incineration disposal, and cement kiln co-processing. The specific introduction is as follows: [0003] There are applicable standards for hazardous waste landfills. First, the materials need to be solidified and stabilized to meet the entry standards. However, after a period of time, the leaching toxicity does not meet the requirements, and heavy metals ooze out. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B7/02C22B13/02C22B19/30C22B21/00C22B26/10C22B26/22C22B34/32C01B17/74
CPCC01B17/74C22B7/001C22B7/02C22B13/025C22B19/30C22B21/0069C22B26/10C22B26/22C22B34/32Y02P10/20
Inventor 毛谙章周兆安李俊刘小文俞挺李加兴
Owner ZHAOQING FEINAN METAL
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