New formula and process method for preparing electrolytic manganese slag brick

Abstract

The invention provides a new formula and a process method for preparing an electrolytic manganese slag brick, and belongs to the fields of the comprehensive utilization of industrial solid wastes and building materials. At present, the patent technology of preparing the building materials by using manganese slag has the common defect that before alkaline materials such as cement and the like are added, a large quantity of ammonium salts such as ammonium sulfate in the electrolytic manganese slag are not extracted, and the ammonium salts react with the alkaline materials to release a large amount of ammonia during operation, so environmental pollution and the loss of ammonia nitrogen are caused; and before being used, the electrolytic manganese slag is not modified, so the gelatinization activity of the electrolytic manganese slag cannot be well exerted. In order to solve the problem, programs for washing the slag and processing lime slurry and the operations of atomizing and adding a water glass dilute solution are added specially in the process, wherein by the program for washing the slag, the problem of the pollution of the electrolytic manganese slag is solved; and water glass is used as an active initiator for the electrolytic manganese slag serving as gelled materials and a reinforcer for reinforcing the strength of silicate concrete, so that the strength of the electrolytic manganese slag brick serving as a finished product can be reinforced greatly.

Description

technical field [0001] The invention provides a new formula and process method for preparing electrolytic manganese slag bricks, belonging to the field of comprehensive utilization of industrial solid waste and building materials. Background technique [0002] China is currently the world's largest producer of manganese, and the production of electrolytic manganese metal accounts for more than 90% of the world. The electrolytic manganese slag discharged during the production of electrolytic manganese metal belongs to the second type of industrial waste. The manganese sulfate and manganese in electrolytic manganese slag Ammonium sulfate, etc. are the main pollutants. The existing patented technology "a comprehensive utilization process of electrolytic manganese slag" has proposed a specific method of pollution control, but the remaining waste residue after the pollution has been eliminated has not been consumed in large quantities. As a result, nearly ten million tons of mang...

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Problems solved by technology

[0011] The "material" in the above formula refers to solid materials, and the electrolytic manganese slag needs to be processed in advance. The slag washing principle and operation process of "a small amount of times" mentioned above are used to wash slag, and more than 80% of manganese sulfate and ammonium sulfate in the slag are washed out, such as water-soluble sulfate, and the slag washing not only solves the pollution of electrolytic manganese slag The problem is that the slag washing solution can be reused for the production of electrolytic manganese metal or manganese compounds, making full use of manganese resources and ammonia nitrogen resources. Add the lime slurry after quickliming water into the slurry, and adjust the pH value of the slurry to 8-10, and stir for 0.5 hours to mix it evenly. Due to the occurrence of many chemical reactions, the addition of lime slurry has many functions. First, The ammonium sulfate remaining in the electrolytic manganese slag can be changed into free ammonia and dissolved in water for complete removal later; the second is to make the residual heavy metal ions in the electrolytic manganese slag form hydroxide and other precipitates, solidify them in the slag, and let The electrolytic manganese slag reaches the level of harmlessness; the third is to change the acidic electrolytic manganese slag to alkaline, activate the active ingredients such as aluminum and silicon in the electrolytic manganese slag, and completely activate the gelling activity of the electrolytic manganese slag so that it can be used to prepare building materials

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