Foam concrete produced by electrolytic manganese residue at normal temperature and preparation method thereof

Abstract

The invention relates to a foam concrete produced by electrolytic manganese residue at normal temperature and a preparation method thereof. The foam concrete is prepared by electrolytic manganese residue, lime, cement, water glass, concrete foaming agent and the like with water under normal temperature. The preparation method comprises the following steps of extracting main pollutants in the electrolytic manganese residue through an inventive technology of a comprehensive utilizing process of electrolytic manganese residue to manufacture chemical products; placing the rest residue slurry in a large-scale preprocessing pool, adding lime with corresponding amount, agitating uniformly to digest and solidify the residual harmful components; treating the electrolytic manganese residue in a harmless way; activating the effective components in the electrolytic manganese residue; discontinuously agitating, and preprocessing for more than 48 hours for later use; getting the slurry with a certain amount when necessary, adding cement with corresponding amount, agitating uniformly as a material A; dissolving and diluting the concrete foaming agent with water in proper amount, placing the concrete foaming agent in a special cement foaming machine to produce foams; adding water glass at the middle and later periods of shaping foams to disperse in the foams as a material B; mixing the material A and the material B in a foam concrete machine to form into foam concrete so as to directly perform pouring construction on the building site; or pouring the foam concrete mixed by the material A and the material B in a die, shaping by cutting in required dimension, and curing at a normal temperature to manufacture building materials of light foam concrete wall blocks.

Description

Technical field: [0001] The invention relates to a normal-temperature production of foamed concrete by electrolytic manganese slag and a preparation method thereof, belonging to the technical field of comprehensive utilization of industrial solid waste. Background technique: [0002] China is currently the world's largest producer of manganese, which accounts for more than 90% of the world's electrolytic manganese metal. Electrolytic manganese slag is the solid waste left after manganese carbonate ore powder is treated with sulfuric acid solution to produce electrolytic manganese metal. It belongs to the second type of industry. Solid waste, manganese sulfate, ammonium sulfate, etc. are the main pollutants. There is a patented technology "a process for comprehensive utilization of electrolytic manganese slag" to treat it, but the waste residue left after the pollution has been eliminated has not been able to be consumed in large quantities. As a result, nearly 10 million ton...

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Problems solved by technology

[0002] China is currently the world's largest producer of manganese, which accounts for more than 90% of the world's electrolytic manganese metal. Electrolytic manganese slag is the solid waste left after manganese carbonate ore powder is treated with sulfuric acid solution to produce electrolytic manganese metal. It belongs to the second type of industry. Solid waste, manganese sulfate, ammonium sulfate, etc. are the main pollutants. There is a patented technology "a process for comprehensive utilization of electrolytic manganese slag" to treat it, but the waste residue left after the pollution has been eliminated has not been able to be consumed in large quantities. As a result, nearly ten million tons of electrolytic manganese slag discharged by the national manganese industry every year not only takes up a lot of land to be piled up, but also brings many related problems

[0003] The currently published patent technologies for preparing building materials using electrolytic manganese slag mainly include: "200910085791.1 A method for preparing building materials using electrolytic manganese slag", "200910304666.5 An electrolytic manganese slag brick and its preparation method", "200910091888.3- A preparation method of electrolytic manganese slag autoclaved bricks" and "200910309410.3 an aerated concrete produced by using electrolytic manganese slag and its preparation method", etc., all have a common deficiency that a large amount of electrolytic manganese slag is not added before lime The extraction of ammonium sulfate will inevitably cause a large amount of ammonia gas to escape when adding alkaline substances such as lime and cement, thereby causing serious pollution to the environment and loss of ammonia nitrogen; in addition, most of the above operations require considerable energy consumption-use high temperature It is not only not suitable for the development model of low-carbon economy, but also the output of products and the consumption of electrolytic manganese slag are greatly limited.

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