Municipal sludge expanded ceramsite and preparation method thereof
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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
Inactive Publication Date: 2010-01-06
XIAN RES & DESIGN INST OF WALL & ROOF MATERIALS CO LTD
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[0002] At present, the ceramsite used in construction is mainly made of clay, shale, etc., and is produced through metering, aging, mixing, granulation, and back to brick kiln roasting. It has the characteristics of light weight, high strength, energy saving and heat preservation. However, Need to consume a lot of clay and shale resources, while destroying vegetation and destroying cultivated land
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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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Abstract
The invention provides municipal sludge expanded ceramsite and a preparation method thereof. The municipal sludge expanded ceramsite is prepared from the following materials by mass percentage: 20% to 45% of municipal sludge, 50% to 70% of shale, tailings or clay, 1% to 5% of organic matter and 1% to 5% of iron powder, wherein, the tailings is one of pyrite tailings, gold tailings, lead-zinc tailings and aluminum tailings; and the organic matter is sawdust. The preparation method comprises the following steps: feeding the shale, tailings or clay into a crusher, and carrying out the screening treatment; adding and mixing the municipal sludge, the organic matter and the iron powder, feeding into an ageing silo and stirring; then, feeding into a granulating machine, granulating and calcinating in a rotary kiln; and finally, cooling and stacking the calcinated ceramsite by classification. By using a great amount of municipal sludge, the invention is resource-saving and environment-friendly; compared with the original cost, the overall cost of a building is reduced by 5% to 10%; and the prepared expanded ceramsite has the advantages of light weight, fire resistance, sound absorption, good heat insulating and preserving performance, simple process and low cost, so that the invention is suitable for industrialized production.
Description
Technical field [0001] The invention belongs to the technical field of building materials, and relates to a city sludge expanded ceramsite and a manufacturing method thereof. Background technique [0002] At present, the ceramsite used in construction is mainly made of clay, shale, etc. as raw materials, and is produced through the process of measuring, aging, mixing, granulating, and returning to the brick kiln. It has the characteristics of light weight, high strength, energy saving and heat preservation, but, Need to consume a lot of clay and shale resources, destroy vegetation and destroy farmland at the same time. With the acceleration of urbanization, the sludge produced by urban sewage treatment throughout the country is as high as 12 million tons per year, and it is increasing at a rate of 15% per year. A large amount of sludge is mainly disposed of by landfill and other measures, which will cause secondary pollution to groundwater. . Therefore, exploring the treatment ...
Claims
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Application Information
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