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Porous self-loading zeolite material prepared from acid-process lithium slag as well as preparation method and application of porous self-loading zeolite material

A technology of zeolite material and lithium slag, applied in the field of porous self-supported zeolite material and its preparation, can solve the problems of high porosity, low bulk density, solid waste accumulation of lithium slag by acid method, etc., achieve excellent adsorption performance, protect the environment, protect the environment The effect of mechanical properties

Active Publication Date: 2020-04-17
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method provided by the present invention prepares acid-process lithium slag into a porous self-loaded zeolite material with low bulk density, high porosity and loaded analcime, which has excellent adsorption performance and can be applied to the adsorption of heavy metal ions, effectively solving the problem of acid-process lithium slag waste accumulation problem

Method used

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  • Porous self-loading zeolite material prepared from acid-process lithium slag as well as preparation method and application of porous self-loading zeolite material
  • Porous self-loading zeolite material prepared from acid-process lithium slag as well as preparation method and application of porous self-loading zeolite material
  • Porous self-loading zeolite material prepared from acid-process lithium slag as well as preparation method and application of porous self-loading zeolite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The preparation steps are shown in 1:

[0040] (1) Acid-process lithium slag powder (LS) is a finely ground powder obtained from the residue obtained after lithium carbonate is extracted from spodumene by sulfuric acid method. ) calcining at calcination temperature for 2h to obtain modified lithium slag powder, marked as MLS;

[0041] (2) Add 347g of alkaline activator (AA) to 400g of modified lithium slag powder and stir and mix for 2min, then add 10g of foaming agent and 2g of foam stabilizer to it, stir and mix well, then cast the mold, and then place the mold Curing in a concrete accelerated curing box at 70°C for 24 hours, the lithium slag-based geopolymer foam material was obtained, marked as FMn1.4; among them, the alkaline activator was composed of sodium hydroxide, water and water glass, and the modulus was 1.4; foaming agent is 35% mass concentration of hydrogen peroxide; foam stabilizer is analytically pure calcium stearate (Cs); the molar ratio of Na elemen...

Embodiment 2

[0044] (1) Acid-process lithium slag powder is a finely ground powder obtained by extracting lithium carbonate from spodumene by sulfuric acid method. The acid-process lithium slag powder is calcined at 700°C (heating rate 10°C / min). Calcined at lower temperature for 2 hours to obtain modified lithium slag powder, marked as MLS;

[0045] (2) Add 311g of alkaline activator to 400g of modified lithium slag powder and stir and mix for 2min, then add 15g of foaming agent and 3g of foam stabilizer to it, stir and mix well and cast the mold, then place the mold on the concrete to accelerate Curing at 70°C for 24 hours in a curing box, the lithium slag-based geopolymer foam material was obtained, which was marked as FMn1.2; among them, the alkaline activator was composed of sodium hydroxide, water and water glass, and the modulus was 1.2; The foaming agent is hydrogen peroxide with a mass concentration of 35%; the foam stabilizer is analytically pure calcium stearate; the molar ratio...

Embodiment 3

[0048] (1) Acid-process lithium slag powder is a finely ground powder obtained by extracting lithium carbonate from spodumene by sulfuric acid method. The acid-process lithium slag powder is calcined at 700°C (heating rate 10°C / min). Calcined at lower temperature for 2 hours to obtain modified lithium slag powder, marked as MLS;

[0049] (2) Add 275g of alkaline activator to 400g of modified lithium slag powder and stir and mix for 2min, then add 20g of foaming agent and 4g of foam stabilizer to it, stir and mix well and cast the mold, then place the mold on concrete to accelerate Curing in the curing box at 70°C for 24 hours, the lithium slag-based geopolymer foam material was obtained, which was marked as FMn1.0; among them, the alkaline activator was composed of sodium hydroxide, water and water glass, and the modulus was 1.0; The foaming agent is hydrogen peroxide with a mass concentration of 35%; the foam stabilizer is analytically pure calcium stearate; the molar ratio o...

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Abstract

The invention provides a porous self-loading zeolite material prepared from acid-process lithium slag as well as a preparation method and application of the porous self-loading zeolite material, and relates to the technical field of zeolite materials. The method comprises the steps: calcining the acid-process lithium slag to obtain modified lithium slag; mixing the modified lithium slag with an alkaline activator, a foaming agent and a foam stabilizer, and sequentially carrying out molding and accelerated maintenance to obtain a lithium slag-based geopolymer foaming material; and carrying outsaturated steam curing on the lithium slag based geopolymer foaming material to obtain the porous self-loaded zeolite material. The prepared porous self-loaded zeolite material is low in volume weightand high in porosity and is loaded with analcime; meanwhile, the porous self-loaded zeolite material has a solid blocky adsorbent having certain compressive strength; the porous self-loaded zeolite material has more excellent adsorption performance than fly ash-based geopolymer, kaolin-based geopolymer and lithium slag-based geopolymer materials, can be applied to adsorption of heavy metal ions,solves the problem of accumulation of lithium slag solid wastes, protects the environment and saves resources.

Description

technical field [0001] The invention relates to the technical field of zeolite materials, in particular to a porous self-carrying zeolite material prepared from acid lithium slag and its preparation method and application. Background technique [0002] In recent years, people are increasingly interested in lithium products obtained from lithium sources. At present, the main method for industrial lithium extraction is the concentrated sulfuric acid-calcium carbonate method, and lithium slag (LS) is its by-product. As a kind of solid waste, lithium slag from acid process is used in building materials industry as concrete admixture, and most of it is piled up and landfilled, which leads to serious waste of resources, pollutes the environment, and brings geological environmental risks. Therefore, it will be of great significance to realize the comprehensive utilization of acid lithium slag and reduce the environmental problems caused by accumulation or landfill. Contents of th...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B12/00C04B7/24C04B40/02C04B20/04C04B18/04B01J20/02
CPCB01J20/02C04B7/243C04B12/005C04B18/0481C04B20/04C04B28/006C04B40/0277C04B2111/00017C04B22/068C04B38/02Y02W30/91Y02P40/10
Inventor 刘泽韩乐张延博王吉祥
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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