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Method and system for co-production of sulfoaluminate-potassium magnesium phosphate composite gel material and sulfur

A technology of potassium magnesium phosphate composite gel and composite gelling material, applied in chemical instruments and methods, preparation/purification of sulfur compounds and sulfur, etc.

Active Publication Date: 2022-04-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After research, the inventor found that in the prior art, sulfoaluminate cementitious materials have been used to modify magnesium phosphate cementitious materials to improve their water resistance, but the sulphoaluminate-potassium magnesium phosphate composites have not been prepared by calcination of industrial solid waste. The technical route of parallel co-production of sulfur from cementitious materials, if typical industrial solid waste is used as raw material for calcination to directly prepare sulphoaluminate-potassium magnesium phosphate composite cementitious material clinker co-production of sulfur, typical industrial solid waste can be scaled to scale, Intensive path development

Method used

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  • Method and system for co-production of sulfoaluminate-potassium magnesium phosphate composite gel material and sulfur

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Embodiment 1

[0063] Such as figure 1 As shown, the aluminum ash is first processed through an aluminum ash calcination kiln to convert the aluminum nitride inside into alumina. After the desulfurization magnesium slag and carbide slag are matched, they are sent to the rotary dryer. The heat source in the rotary dryer comes from The high-temperature flue gas produced by calcining aluminum ash, the dried calcium carbide slag and desulfurized magnesium slag are matched with the calcined aluminum ash to form the raw material of sulfoaluminate-potassium magnesium phosphate composite cementitious material, which is dried, Based on the calcined raw meal solid matter, desulfurization magnesium slag: 70%, aluminum ash: 10%, carbide slag: 20%. The matched raw materials are directly transported into the rotary kiln (clinker calcining kiln) for calcination after being pulverized by a pulverizer. The calcination temperature is 1280°C and the calcination time is 60 minutes. The high-temperature flue ga...

Embodiment 2

[0066] The aluminum ash is first processed by the aluminum ash calcining kiln to convert the aluminum nitride inside into alumina. After the desulfurization magnesium slag and carbide slag are matched, they are sent to the rotary dryer. The heat source in the rotary dryer comes from the calcined aluminum ash The generated high-temperature flue gas, dried calcium carbide slag, desulfurized magnesium slag and calcined aluminum ash are matched as raw materials to form a raw material of sulfoaluminate-potassium magnesium phosphate composite cementitious material, which is dried and calcined In terms of matching raw material solid matter, desulfurization magnesium slag: 60%, aluminum ash: 15%, carbide slag: 25%. The matched raw materials are directly sent to the rotary kiln (clinker calcining kiln) for calcination after being pulverized by a pulverizer. The calcination temperature is 1260°C and the calcination time is 90 minutes. The high-temperature flue gas generated is mixed wit...

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Abstract

The invention discloses a method and system for the co-production of sulfoaluminate-potassium magnesium phosphate composite gel material and sulfur, comprising the following steps: mixing calcium carbide slag and desulfurization magnesium slag and then drying to obtain a drying material; calcining aluminum ash, Convert aluminum nitride in aluminum ash to alumina to obtain calcined aluminum ash; grind and homogenize the dried material and calcined aluminum ash to obtain a raw meal mixture, and heat the raw meal mixture to 1250-1300°C for calcination to obtain Sulfoaluminate-potassium magnesium phosphate composite cement clinker and SO-containing 2 Flue gas; will contain SO 2 The flue gas undergoes catalytic reduction to obtain sulfur; the mass ratio of aluminum ash, desulfurized magnesium slag, and carbide slag is 10-15:60-70:20-25. The invention can not only solve the disadvantage of poor water resistance of magnesium phosphate gelling materials, but also use a large amount of industrial solid waste and reduce excessive emission of carbon dioxide, aggravate the greenhouse effect of the environment, and can produce a large amount of sulfur to reduce the production cost of sulfur.

Description

technical field [0001] The invention relates to the fields of chemical industry, building material technology, comprehensive utilization of magnesium-based desulfurization slag and aluminum ash resources, and environmental protection and treatment, and specifically relates to a method and system for co-production of sulfoaluminate-potassium magnesium phosphate composite gel material and sulfur. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the acceleration of the industrialization process, the industrial economic development model based on resource and energy consumption has also caused serious pollution and damage to the ecological environment. The implementation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/24C04B7/147C01B17/04
CPCC04B7/24C04B7/147C01B17/0473C01B17/0259Y02P20/129Y02P40/10
Inventor 任常在王文龙武双姚永刚宋垣波
Owner QILU UNIV OF TECH