Sintered brick prepared from manganese slag and preparation method of sintered brick

The invention discloses a sintered brick prepared from manganese slag and a preparation method of the sintered brick. The sintered brick is prepared from, by weight, 100-150 parts of manganese slag, 60-80 parts of paper mill sludge, 5-10 parts of redispersible powder, 4-6 parts of rosin resin and 5-8 parts of boric oxide. According to the sintered brick, manganese slag and paper mill sludge serve as the main raw materials, an effective approach is provided for comprehensively utilizing solid waste, environment pollution is reduced, clay resources are protected, sustainable development is facilitated for human, and high economic value is achieved. The sintered brick has the advantages of being high in strength, low in water absorption rate, low in density, good in heat preservation and thermal insulation effect, wide in raw material source, low in cost, simple in preparation process, low in energy consumption and the like and has quite good market prospects.