Dry transporting and dry stockpiling method of Bayer red mud

Abstract

The invention relates to the field of comprehensive utilization of red mud, and in particular relates to a dry transporting and dry stockpiling method of Bayer red mud for the low-cost, low-investment, safe and environment-friendly comprehensive utilization of waste generated in a producing process of aluminum oxide. In order to overcome the defects in the prior art, the invention provides a dry transporting and dry stockpiling method for Bayer red mud, which is high in the rate of multipurpose utilization, safe and environment-friendly. The method is characterized by comprising the following steps of: enabling the waste generated when the aluminum oxide is refined from bauxite to flow into a red mud mixing groove per se, transporting the red mud in the red mud mixing groove to a pressure filter by a slurry pump, transporting the red mud subjected to filter pressing to a red mud entrucking storage yard through a mud discharging belt, entrucking the red mud of the red mud entrucking storage yard, transporting to a red mud storehouse, and tedding, flattening and laminating the red mud in the red mud storehouse by engineering machinery. The building at different regions and different times and the reclamation of the red mud storehouse can be realized by virtue of dry process discharge, so that the problem of the insufficient periodical capital investment can be solved, and the soil renting time can be reduced.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of red mud, in particular to a Bayer red mud dry transportation and dry storage method for low-cost, low-input, safe and environmentally friendly comprehensive utilization of waste generated in the alumina production process. Background technique [0002] At present, red mud is produced as waste during the process of refining alumina from bauxite. The comprehensive utilization of red mud is still a worldwide problem. In recent years, the comprehensive utilization of red mud in my country has been highly valued by all parties, and interdisciplinary and multi-field comprehensive utilization technology research work has been carried out, such as the extraction of valuable metals from red mud and the production of cement with ingredients. , Building bricks, mine cemented filling cementitious materials, roadbed consolidation materials and high-performance concrete admixtures, chemically bonded c...

AI Technical Summary

Problems solved by technology

This method is mostly used for large-scale red mud reservoirs with a storage capacity of more than 10 million m3, which has a great impact on the surrounding environment and is not conducive to re-cultivation

The second method is the semi-dry method of vehicle stacking, which is to dry or filter the wet red mud with a high moisture content to reduce the moisture content from 55% to about 42%, and then use vehicles, etc. Transport vehicles are transported to the red mud reservoir for dumping. Since its physical state is viscous, the water precipitated from the red mud is used to wash away when dumping. This discharge method saves the construction investment of pipeline transportation facilities, but has little impact on the surrounding environment. Not reduced, not conducive to re-cultivation, can only be used in abandoned valleys and mountainous areas that do not need re-cultivation

The moisture content of the semi-dry stockpiled red mud slurry is about 42%, and it is transported by tank trucks. It is unloaded on a special unloading platform and diluted with backwater to increase the fluidity of the red mud. Recycle

Images