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Porous self-supporting zeolite material prepared by acid lithium slag and its preparation method and application

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

Active Publication Date: 2021-05-25
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-supporting zeolite material prepared by acid lithium slag and its preparation method and application
  • Porous self-supporting zeolite material prepared by acid lithium slag and its preparation method and application
  • Porous self-supporting zeolite material prepared by acid lithium slag and its preparation method and application

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Experimental program
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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-carrying zeolite material prepared by an acid method lithium slag, a preparation method and application thereof, and relates to the technical field of zeolite materials. In the present invention, acid-process lithium slag is calcined to obtain modified lithium slag; the modified lithium slag is mixed with an alkaline activator, a foaming agent and a foam stabilizer, and sequentially formed and accelerated maintenance is performed to obtain a lithium slag-based substrate Polymer foaming material; the lithium slag-based geopolymer foaming material is cured with saturated steam to obtain a porous self-carrying zeolite material. The porous self-carrying zeolite material prepared by the present invention is a solid block adsorbent with low bulk density, high porosity and loading analcime, and has a certain compressive strength at the same time. Geopolymers, kaolin-based geopolymers, and lithium slag-based geopolymer materials have better adsorption properties, which can be applied to the adsorption of heavy metal ions, and solve the problem of lithium slag solid waste accumulation, protect the environment and save 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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Patent Type & Authority Patents(China)
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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