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Method and system for preparing sulfoaluminate cement from all solid wastes pretreated by aluminum ash

A sulphoaluminate cement and pretreatment technology, which is applied in building materials technology, comprehensive utilization of bulk industrial solid waste resources, environmental protection and treatment, and aluminum processing fields, can solve problems such as long-term operation, condenser blockage, and easy knot of rotary kiln Circle and other issues to achieve the effect of increasing energy utilization and reducing energy consumption

Active Publication Date: 2020-06-05
SHANDONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors of the present invention have found that when aluminum ash is used to replace part of the bauxite, the tail of the rotary kiln is more likely to form rings, the condenser is blocked, it is difficult to run for a long time, and it is impossible to completely replace aluminum ash with aluminum ash. Bauxite

Method used

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  • Method and system for preparing sulfoaluminate cement from all solid wastes pretreated by aluminum ash
  • Method and system for preparing sulfoaluminate cement from all solid wastes pretreated by aluminum ash
  • Method and system for preparing sulfoaluminate cement from all solid wastes pretreated by aluminum ash

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Embodiment approach

[0057] In order to realize the preparation of sulphoaluminate cement from the above-mentioned aluminum ash pretreatment of all solid waste, the third embodiment of the present invention provides a method for realizing the above-mentioned aluminum ash pretreatment of all solid waste to prepare sulphoaluminate cement System, including indirect rotary drum heating furnace, cyclone condenser, dryer, raw material pulverizer, rotary kiln, the inlet of indirect rotary drum heating furnace is set to connect aluminum ash source, the solid phase outlet of indirect rotary drum heating furnace is connected The material inlet of the dryer, the gas phase outlet of the indirect rotary drum heating furnace is connected to the inlet of the cyclone condenser, the gas phase outlet of the cyclone condenser is connected to the heat exchange gas inlet of the dryer, and the material inlet of the dryer is also set to be used to connect the red mud source , desulfurization gypsum source, calcium carbid...

Embodiment 1

[0066] A system for preparing sulphoaluminate cement from all solid waste pretreated with aluminum ash, such as figure 1 As shown, hopper 1, automatic weighing scale 2, indirect drum heating furnace 3, burner nozzle 5, red mud storage bin 6, desulfurized gypsum storage bin 7, carbide slag storage bin 8, belt conveyor 9, feeding pipe Road 10, air extractor 11, cyclone condenser 12, cooling fan 13, salt storage bin 14, rotary drying cylinder 15, raw material grinding machine 16, dry raw material bin 17, rotary kiln 18, material grinding machine 19.

[0067]The aluminum ash is first fed into the automatic weighing scale 2 through the hopper 1, and sent into the indirect rotary drum heating furnace 3 through the belt conveyor, and the natural gas 4 is heated to the indirect rotary drum heating furnace 3 through the burner nozzle 5 to realize the indirect transfer The aluminum ash in the drum heating furnace 3 is denitrified and desalted by high-temperature calcination, and the alu...

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Abstract

The invention discloses a method and a system for preparing sulfoaluminate cement from all solid wastes pretreated by aluminum ash. The method comprises the following steps of: heating aluminum ash tocarry out a heat treatment on aluminum ash at a temperature of not lower than 900 DEG C; homogenizing and mixing processed aluminum ash with red mud, desulfurized gypsum and carbide slag, drying themixed materials by using hot gas generated by the heat treatment, carrying out raw powder proportioning and grinding on the dried materials, and calcining the materials after raw powder proportioningand grinding to obtain sulfoaluminate cement clinker; wherein the aluminum ash comprises secondary aluminum ash or the aluminum ash is secondary aluminum ash. The tail of the rotary kiln is not proneto ring formation, the condenser is prevented from being blocked, long-time operation is guaranteed, and bauxite can be completely replaced.

Description

technical field [0001] The invention relates to the fields of aluminum processing, building material technology and comprehensive utilization of bulk industrial solid waste resources and environmental protection treatment, and relates to a method and system for preparing sulphoaluminate cement from all solid waste pretreated with aluminum ash. 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] Industrial solid waste refers to various waste residues, dust and other wastes discharged into the environment during the industrial production process, which can be divided into general industrial wastes (such as blast furnace slag, steel slag, red mud, tailings, fly ash, desulfurizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/32C04B7/147
CPCC04B7/147C04B7/32Y02P40/10
Inventor 王文龙任常在成望海王旭江武双姚永刚刘全勋
Owner SHANDONG UNIV
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