Desulfurizing agent with red mud waste residues as active raw material as well as preparation method and application thereof

A technology of desulfurization agent and red mud, which is applied in the field of resource utilization of waste products and new environmental materials, can solve problems such as H2S pollution, achieve high value-added resource utilization, improve penetration sulfur capacity, and have a wide range of applications

Active Publication Date: 2020-05-08
南京环福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 successful application of the present invention will not only completely solve the problem of safe disposal of red mud waste residue, straw and walnu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] (1) Raw material crushing

[0029] After the red mud waste residue and zinc oxide powder are pulverized by a ball mill, pass through a 100-140-mesh standard sieve (0.106-0.150mm) and homogenize for later use; grind the walnut shell powder through a crusher, pass through a 40-60-mesh standard sieve ( 0.250-0.425mm) and homogenized for later use; the rice straw is pulverized by a crusher to obtain straw fibers with a length of less than 5mm;

[0030] (2) Ingredients and granulation

[0031] Weigh 55g red mud waste residue powder, 15g walnut shell powder, 10g rice straw fiber and 10g zinc oxide powder, then weigh 10g polyvinyl alcohol solution and 10g deionized water, mix and grind to granulate;

[0032] (3) Molding and calcination

[0033] Extrude the granulated mud to obtain a ceramic green body, place it in a muffle furnace, and calcinate it at 900°C for 4 hours in an air atmosphere to obtain a porous ceramic-based desulfurizer;

[0034] (4) Desul...

Example Embodiment

[0039] Example 2:

[0040] (1) Raw material crushing

[0041] After the red mud waste residue and zinc oxide powder are pulverized by a ball mill, pass through a 100-140-mesh standard sieve (0.106-0.150mm) and homogenize for later use; grind the walnut shell powder through a crusher, pass through a 40-60-mesh standard sieve ( 0.250-0.425mm) and homogenized for later use; the rice straw is pulverized by a crusher to obtain straw fibers with a length of less than 5mm;

[0042] (2) Ingredients and granulation

[0043] Weigh 65g red mud waste residue powder, 15g walnut shell powder, 5g rice straw fiber and 5g zinc oxide powder, then weigh 10g polyvinyl alcohol solution and 10g deionized water, mix and grind to granulate;

[0044] (3) Molding and calcination

[0045] The granulated mud is extruded to form a ceramic green body, which is placed in a muffle furnace and calcined at 1000°C for 6 hours in an air atmosphere to obtain a porous ceramic-based desulfurizer;

[0046] (4) D...

Example Embodiment

[0051] Example 3:

[0052] (1) Raw material crushing

[0053] After the red mud waste residue and zinc oxide powder are pulverized by a ball mill, pass through a 100-140-mesh standard sieve (0.106-0.150mm) and homogenize for later use; grind the walnut shell powder through a crusher, pass through a 40-60-mesh standard sieve ( 0.250-0.425mm) and homogenized for later use; the rice straw is pulverized by a crusher to obtain straw fibers with a length of less than 5mm;

[0054] (2) Ingredients and granulation

[0055] Weigh 55g red mud waste residue powder, 20g walnut shell powder, 5g rice straw fiber and 10g zinc oxide powder, then weigh 10g polyvinyl alcohol solution and 10g deionized water, mix and grind to granulate;

[0056] (3) Molding and calcination

[0057] The granulated mud is extruded to form a ceramic green body, which is then placed in a muffle furnace and calcined at 900°C for 6 hours in an air atmosphere to obtain a porous ceramic-based desulfurizer;

[0058] ...

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Abstract

The invention discloses a desulfurizing agent with red mud waste residues as an active raw material as well as a preparation method and application thereof. A porous ceramic-based desulfurizing agentis prepared from walnut shell powder, straw fibers, zinc oxide powder, a forming agent solution and polluted red mud waste residues discharged during extraction of aluminum oxide in the aluminum production industry. Red mud waste residues, walnut shell powder, straw fibers, zinc oxide powder and a forming agent solution are subjected to crushing, blending, granulation, forming, calcination and other processes to prepare the green porous ceramic-based desulfurizing agent with high sulfur capacity and low cost. The desulfurizing agent disclosed by the invention not only can achieve resource utilization of three wastes, namely the red mud, the walnut shells and the straw fibers and thoroughly solve heavy metal pollution in red mud waste residues, but also is high in precision of adsorbing andremoving low-concentration H2S, high in efficiency and wide in application range, and has a wide market application prospect.

Description

technical field [0001] The invention provides a porous ceramic-based desulfurizer using red mud waste residue as an active raw material and a preparation method thereof, belonging to the field of resource utilization of waste products and new environmental materials. Background technique [0002] As the world's largest producer of alumina, China discharges hundreds of millions of tons of red mud every year. The open-air stacking of red mud is currently the main disposal method for alumina production enterprises, and its disposal cost accounts for about 5% of the output value of alumina products. At the same time, red mud has not been effectively utilized. The main chemical elements of red mud are calcium, silicon, aluminum, iron, sodium, titanium, and a small amount of magnesium, potassium, and sulfur, as well as very small amounts of heavy metal elements such as manganese, zinc, copper, chromium, and lead. Entering groundwater, surface water and other water bodies can form...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/622B01D53/86B01D53/52
CPCC04B38/0675C04B35/62204C04B35/622B01D53/8612C04B2235/3284C04B2235/6021C04B2235/656C04B2235/6567
Inventor 沈岳松金奇杰
Owner 南京环福新材料科技有限公司
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