Method for producing active admixture by treating electrolytic manganese slag through non-homogenization process

Abstract

The invention provides a method for producing an active admixture by treating electrolytic manganese slag through a non-homogenization process. The method comprises the following steps of (1) the electrolytic manganese slag is continuously fed into a kiln tail smoke chamber through an air locking feeding system; (2) mineral adjusting material powder is preheated through a preheater system and is fed into a decomposing furnace, and then the mineral adjusting material powder is continuously fed into the kiln tail smoke chamber to be mixed with electrolytic manganese slag; (3) an electrolytic manganese slag and mineral adjusting material powder mixture enters a rotary kiln through the kiln tail smoke chamber, is further mixed in the kiln tail smoke chamber and the rotary kiln, and is calcinedat the same time to obtain cooked slag; and (4) the obtained cooked slag is discharged into a grate cooler from a kiln head of the rotary kiln, and is cooled to obtain the active admixture. Accordingto the method, dry-process rotary kiln cement production line equipment provided with the air locking feeding system is utilized, the non-homogenization process is adopted to treat the electrolytic manganese slag to produce the active admixture, and the electrolytic manganese slag does not need to be dried and ground, so that a large amount of energy consumption can be saved; components such as silicon, aluminum, iron, calcium and calcium sulfate in the electrolytic manganese slag are effectively utilized; volatile pollutants are prevented from polluting the environment; and the production investment is low.

Description

technical field

[0001] The invention relates to a method for treating electrolytic manganese slag by a non-homogenization process, in particular to a method for processing electrolytic manganese slag by a non-homogenization process to produce admixture materials. Background technique

[0002] Electrolytic manganese slag is a neutral or weakly acidic waste residue produced by solid-liquid separation (press filtration) during the preparation of manganese electrolyte by acid leaching (combination) of manganese ore. At present, my country's electrolytic manganese production capacity has exceeded 2 million tons, and the amount of acid leaching waste slag discharged per ton of electrolytic manganese production is 5 to 7 tons. When using lower-grade manganese ore raw materials, the slag produced per ton of electrolytic manganese can reach 10 tons , the annual actual accumulation or burial amount reaches hundreds of millions of tons, and the annual new increment reaches tens of milli...