Municipal sludge expanded ceramsite and preparation method thereof
A technology of urban sludge and expanded ceramsite, applied in the field of building materials, can solve the problems of consuming large clay and shale resources, destroying cultivated land, destroying vegetation, etc., achieving good economic and social benefits, saving resources, and low cost Effect
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Embodiment 1
[0018] This embodiment is made of the following mass percentages of raw materials: 35% of municipal sludge, 60% of shale or tailings or clay, 2% of organic matter, and 3% of iron powder; the tailings are pyrite tailings and gold tailings. One of ore, lead-zinc tailings and bauxite tailings, the organic matter is wood chips.
[0019] The manufacturing method of this embodiment is:
[0020] (1) The shale or tailings or clay is sent to the crusher for crushing, and then sent to the vibrating screen for screening with a fineness of 0.2~0.8mm;
[0021] (2) Add shale or tailings or clay with a sieving fineness of 0.2-0.8mm to municipal sludge, organic matter and iron powder according to mass percentage, and then send them to the aging warehouse for aging;
[0022] (3) Stir after aging for 72 hours;
[0023] (4) The agitated mixture in step (3) is sent to the granulation machine for granulation, and then sent to the rotary kiln for roasting. The firing temperature is 900~1250℃, and the fuel c...
Embodiment 2
[0026] This embodiment is made from the following mass percentages of raw materials: 40% municipal sludge, 55% shale or tailings or clay, 3% organic matter, 2% iron powder; the tailings are pyrite tailings, gold tailings One of ore, lead-zinc tailings and bauxite tailings, the organic matter is wood chips.
[0027] The manufacturing method of this embodiment is the same as that of embodiment 1.
Embodiment 3
[0029] This embodiment is made of the following mass percentages of raw materials: 45% of urban sludge, 50% of shale or tailings or clay, 3% of organic matter, 2% of iron powder; the tailings are pyrite tailings, gold tailings One of ore, lead-zinc tailings and bauxite tailings, the organic matter is wood chips.
[0030] The manufacturing method of this embodiment is the same as that of embodiment 1.
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