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Method for preparing ultralight ceramsite by utilizing heavy organic contaminated soil and non-ferrous metal smelting slag

A technology of organic pollution and non-ferrous metals, which is applied in the field of soil remediation and can solve problems such as residues

Active Publication Date: 2021-02-12
HEBEI YUHUAN ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation of ceramsite with organic polluted soil as raw material mainly uses fly ash and sludge as ingredients, but there are few reports on the preparation of ceramsite with non-ferrous metal smelting slag as ingredients. The ceramsite prepared with organic polluted soil as raw materials can meet the requirements for the use of building light aggregates, and the risk of heavy metals, dioxins and other pollutants released during the process of ceramsite preparation is controllable

Method used

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  • Method for preparing ultralight ceramsite by utilizing heavy organic contaminated soil and non-ferrous metal smelting slag
  • Method for preparing ultralight ceramsite by utilizing heavy organic contaminated soil and non-ferrous metal smelting slag

Examples

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Effect test

Embodiment 1

[0080] A method for preparing ultra-light ceramsite by using heavy organic polluted soil and non-ferrous metal smelting slag comprises the following steps:

[0081] The inorganic composition (inorganic matter is calculated as oxide) and the content of organic pollutants of the heavily organically polluted soil used in this embodiment are as follows: SiO 2 The content is 59.23wt%, Al 2 o 3 The content is 14.36wt%, Fe 2 o 3 content of 0.76wt%, CaO content of 10.86wt%, MgO content of 7.15wt%, K 2 O content is 0.68wt%, Na 2 The O content is 1.22wt%, the organic pesticide content is 9850mg / kg, the petroleum hydrocarbon content is 48901mg / kg, the polycyclic aromatic hydrocarbon content is 8964mg / kg, and the polychlorinated biphenyl content is 483mg / kg. The inorganic components of copper smelting tailings (both calculated as oxides) are as follows: SiO 2 The content is 51.26wt%, Al 2 o 3 The content is 24.18wt%, Fe 2 o 3 content of 8.85wt%, CaO content of 13.74wt%, MgO cont...

Embodiment 2

[0088] A method for preparing ultra-light ceramsite by using heavy organic polluted soil and non-ferrous metal smelting slag comprises the following steps:

[0089] The inorganic composition (inorganic matter is calculated as oxide) and the content of organic pollutants of the heavily organically polluted soil used in this embodiment are as follows: SiO 2 The content is 32.46wt%, Al 2 o 3 The content is 6.48wt%, Fe 2 o 3 content of 4.59wt%, CaO content of 5.97wt%, MgO content of 2.64wt%, K 2 O content is 0.78wt%, Na 2 The O content is 1.67wt%, the organic pesticide content is 4951 mg / kg, the petroleum hydrocarbon content is 38942 mg / kg, the polycyclic aromatic hydrocarbon content is 7968 mg / kg, and the polychlorinated biphenyl content is 408 mg / kg. The inorganic components of lead smelting tailings (both calculated as oxides) are as follows: SiO 2 The content is 67.48wt%, Al 2 o 3 The content is 24.58wt%, Fe 2 o 3 content of 8.64wt%, CaO content of 14.58wt%, MgO cont...

Embodiment 3

[0096] A method for preparing ultra-light ceramsite by using heavy organic polluted soil and non-ferrous metal smelting slag comprises the following steps:

[0097] The inorganic composition (inorganic matter is calculated as oxide) and the content of organic pollutants of the heavily organically polluted soil used in this embodiment are as follows: SiO 2 The content is 45.89wt%, Al 2 o 3 The content is 8.45wt%, Fe 2 o 3 content of 9.45wt%, CaO content of 14.15wt%, MgO content of 10.46wt%, K 2 O content is 1.05wt%, Na 2 The O content is 1.46wt%, the organic pesticide content is 8912mg / kg, the petroleum hydrocarbon content is 41320mg / kg, the polycyclic aromatic hydrocarbon content is 8612mg / kg, and the polychlorinated biphenyl content is 316mg / kg. The inorganic components of zinc smelting tailings (both calculated as oxides) are as follows: SiO 2 The content is 61.46wt%, Al 2 o 3 The content is 21.46wt%, Fe 2 o 3 content of 10.46wt%, CaO content of 4.75wt%, MgO conten...

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Abstract

The invention relates to a method for preparing ultralight ceramsite from heavy organic contaminated soil and non-ferrous metal smelting slag. The preparation method of the ultralight ceramsite comprises the following steps: (1) proportionally mixing the heavy organic contaminated soil and the non-ferrous metal smelting slag to obtain a mixed material, and (2) granulating and roasting the mixed material obtained in the step (1) to obtain the ultralight ceramsite. According to the method, heavy organic contaminated soil and non-ferrous metal smelting slag can be used as raw materials, the stepsof mixing, granulating, drying, roasting, cooling and the like are carried out, and the ultralight ceramsite with low stacking density, low water absorption rate and leachate organic matter content and heavy metal content meeting requirements is prepared by controlling the ratio of raw materials to auxiliary materials and roasting process parameters, and harmlessness and recycling of the two wastes are realized.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for preparing ultra-light ceramsite by using heavy organic polluted soil and non-ferrous metal smelting slag. Background technique [0002] With the transformation and upgrading of economic development in recent years, the optimization and adjustment of industrial structure and layout, the economic structure "retreating from two to three", and industrial enterprises "entering parks and entering areas", especially the vigorous promotion of supply-side structural reforms, a large number of outdated production capacity has been eliminated. Due to the relocation or closure of some traditional polluting enterprises such as chemical industry and metallurgy, industrial polluted sites continue to emerge. There is a large amount of polluted soil in our country that urgently needs to be repaired, and the soil pollution problem in some areas is serious. Organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/138C04B33/32
CPCC04B33/132C04B33/138C04B33/32C04B2235/6562C04B2235/6567C04B2235/6565C04B2235/77C04B2235/96Y02P40/60
Inventor 陈辉霞佟雪娇王源胡大海黄涛宋庆赟徐红彬张奇
Owner HEBEI YUHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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