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Method for preparing heavy metal soil remediation material from coal gangue

A technology for soil remediation and coal gangue, which is applied in the field of preparing heavy metal soil remediation materials by using coal gangue, can solve the problems of low calorific value of coal gangue, large consumption of amino acids, heavy metal discharge, etc., and achieves reduction in production cost, environmental protection in the preparation process, and cost reduction. reduced effect

Inactive Publication Date: 2019-07-16
珠海三豫环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional treatment methods of coal gangue are used to make bricks, generate electricity or build roads, and the calorific value of coal gangue in some areas is relatively low, which is not suitable for power generation, such as: Sichuan. Therefore, the problem of coal gangue has seriously affected the Normal operation of coal mine
[0004] With the development of national industrialization, heavy metal discharge inevitably occurs, which leads to soil heavy metal pollution. In heavy metal soil, heavy metals such as nickel and chromium are contained, and nickel and chromium can be chelated with amino acids to form amino acid chelates, but For heavy metal-contaminated soil, it is usually in pieces, so the direct application of amino acids will lead to a large consumption of amino acids, and it is difficult to distribute amino acids evenly, resulting in uneven soil remediation;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of method utilizing coal gangue to prepare heavy metal soil restoration material, it comprises the following steps:

[0044] S1: Raw material testing, chemical composition and phase analysis of coal gangue raw materials, limestone or phosphogypsum raw materials, to obtain the chemical composition and content of coal gangue, limestone or phosphogypsum;

[0045] S2: Raw material crushing, the raw material is crushed by a crusher to obtain powder; further, the raw material crushing is divided into two steps, that is, coarse crushing and fine grinding. Yes, the jaw crusher is used for coarse crushing to obtain granular raw materials. The main purpose of coarse crushing is to crush the large coal gangue raw materials into granular raw materials, so that the coal gangue can enter the fine grinding equipment Second, the granular raw materials are sent to the fine grinding equipment for grinding. The preferred fine grinding equipment is a ball mill to obtain powder. Usua...

Embodiment 2

[0057] A kind of method utilizing coal gangue to prepare heavy metal soil restoration material, it comprises the following steps:

[0058] S1: Raw material testing, chemical composition and phase analysis of coal gangue raw materials, limestone or phosphogypsum raw materials, to obtain the chemical composition and content of coal gangue, limestone or phosphogypsum;

[0059] S2: Raw material crushing, the raw material is crushed by a crusher to obtain powder; further, the raw material crushing is divided into two steps, that is, coarse crushing and fine grinding. Yes, the jaw crusher is used for coarse crushing to obtain granular raw materials. The main purpose of coarse crushing is to crush the large coal gangue raw materials into granular raw materials, so that the coal gangue can enter the fine grinding equipment Second, the granular raw materials are sent to the fine grinding equipment for grinding. The preferred fine grinding equipment is a ball mill to obtain powder. Usua...

Embodiment 3

[0071] A kind of method utilizing coal gangue to prepare heavy metal soil restoration material, it comprises the following steps:

[0072] S1: Raw material testing, chemical composition and phase analysis of coal gangue raw materials, limestone or phosphogypsum raw materials, to obtain the chemical composition and content of coal gangue, limestone or phosphogypsum;

[0073] S2: Raw material crushing, the raw material is crushed by a crusher to obtain powder; further, the raw material crushing is divided into two steps, that is, coarse crushing and fine grinding. Yes, the jaw crusher is used for coarse crushing to obtain granular raw materials. The main purpose of coarse crushing is to crush the large coal gangue raw materials into granular raw materials, so that the coal gangue can enter the fine grinding equipment Second, the granular raw materials are sent to the fine grinding equipment for grinding. The preferred fine grinding equipment is a ball mill to obtain powder. Usua...

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Abstract

The invention discloses a method for preparing a heavy metal soil remediation material from coal gangue. The method comprises the following steps: S1, raw material testing; S2, raw material crushing;S3, proportioning; S4, mixing; S5, molding; S6, thermal activation; S7, quenching; S8, drying; S9, crushing; S10, amino acid immobilization; and S11, secondary drying. According to the heavy metal soil remediation material, through thermal activation, the activity of powder is high, the powder can be replaced with heavy metal ions, and thus, the heavy metal ions in soil can be removed; active silicate can react with the heavy metal ions in the soil, so that the heavy metal ions are precipitated after being combined with silicate; mesopores and micropores which are generated by thermal activation can be used as carriers of amino acid or guanidinoacetic acid production mother liquor, after the remediation material is applied to the soil, amino acid is chelated with the heavy metal ions to form amino acid chelates, and the amino acid chelates are attached to the surface of the powder, so that the heavy metal ions in the soil are removed.

Description

technical field [0001] The invention relates to the technical field of heavy metal soil restoration, in particular to a method for preparing heavy metal soil restoration materials from coal gangue. Background technique [0002] Coal gangue is a solid industrial waste produced during coal mining and processing, which contains a variety of mineral components. Among them, the content of kaolin and quartz accounts for more than 50%, and may also contain illite, chlorite, muscovite, feldspar, pyrite, siderite, hematite, calcite and other crystal phase minerals. Among them, kaolinite, illite, chlorite, muscovite, and feldspar belong to aluminous clay minerals, all of which have good adsorption properties. The main chemical components of coal gangue include AL2O3, SiO2, CaO, MgO, Fe2O3, K2O and Na2O. The contents of these chemical components fluctuate greatly depending on the geological age and region of the coal seam. [0003] However, in my country, the coal gangue stockpiled ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08B09C1/00
CPCB09C1/00B09C1/08C09K17/40
Inventor 周建民
Owner 珠海三豫环保新材料科技有限公司
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