Technology for preparing baking-free bricks with iron tailings, secondary aluminum ash and acid leaching magnesium residues

Abstract

The invention discloses a technology for preparing baking-free bricks with iron tailing-secondary aluminum ash-acid leaching magnesium residues. The iron tailings, aggregate river sand and gel materials are mixed with the pretreatment secondary aluminum ash and quick lime pretreatment acid leaching magnesium residues, uniform stirring is conducted, mixing water is added for pre-activation, then anadditive is added, stirring is conducted in advance, wheel-grinding mixing is performed, final stirring is conducted, after ageing, the mixture is injected into a forming mold, forming pressure is set, by the adoption of staged pressurizing, the mixture is pressed to be formed under constant pressure, and after steam curing maintaining is conducted in an autoclave, the baking-free bricks are obtained through natural maintaining. Quick lime is adopted for pretreating acid leaching magnesium residues and added into the acid leaching magnesium residues to form an alkaline environment, under alkaline conditions, part of heavy metal ions precipitate, meanwhile, a good adsorption effect on ammonium radical ions is realized, pollution of ammonium radical degradation to air is prevented, and a good excitation effect on acid leaching spiegel residues is realized; the active performance of the magnesium residues is excited, and after gel substances and aggregate are added for uniform mixing andstirring, the baking-free bricks are prepared through the method of pressing forming.

Description

technical field [0001] The invention belongs to the technical field of non-burning bricks, and in particular relates to a process for preparing non-burning bricks by using iron tailings-secondary aluminum ash slag-acid leaching manganese slag. Background technique [0002] my country's iron tailings discharge and accumulation are huge. A large amount of iron tailings piled up not only caused serious damage to the environment, but also took up a lot of cultivated land and brought huge safety hazards to the people around the tailings pond. The use of iron tailings to prepare unburned bricks is not only conducive to the sustainable development of mining enterprises, but also can well implement the purpose of building a healthy, environmentally friendly, and resource-saving society in my country. [0003] Lead ash is the waste residue of lead smelting and secondary lead recovery. In industry, lead ash is mainly used to purify elemental lead, recover salt, and be used as deoxidi...

AI Technical Summary

Problems solved by technology

[0004] As an engineering fiber with excellent performance, polypropylene fiber has its main advantages: good mechanical properties, chemical corrosion resistance, and no insects, but it also has some fatal weaknesses: it does not absorb water, is easy to form a ball, and is difficult to mix with cement. Poor dispersion in concrete is not conducive to forming a good collective interface of fiber concrete