A kind of sulfoaluminate cement prepared by utilizing copper, lead and zinc smelting wastewater sludge and preparation method thereof

A technology for sulfoaluminate cement and wastewater sludge, applied in cement production and other directions, can solve the problems of pollution, large amount of wastewater treatment sludge, high cost of hazardous waste, good freeze resistance and harmless treatment , good corrosion resistance effect

Active Publication Date: 2022-07-12
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Description
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Problems solved by technology

[0006] The present invention provides a sulfoaluminate cement prepared by using copper, lead-zinc smelting waste water sludge, to completely or partially solve the problem of large amount of waste water treatment sludge in copper-lead-zinc smelting industry, serious pollution, and simple filling of hazardous waste. The high cost of burial, serious potential pollution, and the use of a large amount of land can not be used reasonably.

Method used

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  • A kind of sulfoaluminate cement prepared by utilizing copper, lead and zinc smelting wastewater sludge and preparation method thereof
  • A kind of sulfoaluminate cement prepared by utilizing copper, lead and zinc smelting wastewater sludge and preparation method thereof

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preparation example Construction

[0051] A method for preparing sulfoaluminate cement prepared by utilizing copper and lead-zinc smelting wastewater sludge, which comprises the steps of sludge drying, raw meal pulverization, calcined clinker pulverization, etc.

[0052] (a) Drying non-ferrous metal smelting waste;

[0053] Preferably, the drying temperature is 75-200°C, the drying temperature controls the calcium sulfate crystal water not to be dried, but becomes anhydrite, and the temperature is controlled so that the heavy metal components with low volatilization points in the sludge do not escape during the drying stage;

[0054] Preferably, the initial water content of the non-ferrous metal smelting waste is 10wt% to 50wt%;

[0055] (b) uniformly mixing the non-ferrous metal smelting waste after drying treatment in step (a) with pulverized limestone, bauxite and calibration raw materials to obtain a mixture and add water for granulation;

[0056] Preferably, the fineness of the crushed limestone and bauxi...

Embodiment 1

[0069] The preparation method of the sulfoaluminate cement provided by the present embodiment comprises the following steps:

[0070] (a) drying the non-ferrous metal smelting waste with an initial water content of 30wt% at 100°C;

[0071] (b) mixing the non-ferrous metal smelting waste after drying treatment in step (a) with pulverized limestone, bauxite and calibration raw materials, and it is 5 parts by weight of non-ferrous metal smelting waste and 45 parts of limestone. , 25 parts of bauxite and 25 parts of fly ash, obtain the mixture and add 6% water to carry out granulation;

[0072] Wherein, the fineness of the crushed limestone and bauxite is to pass through a 0.08mm square-hole sieve, and the sieve surplus is 8%;

[0073] (c) drying the pellets obtained in step (b) to a moisture content of less than 2%, then calcining at 1200° C. for 20 minutes, and in the process of calcining, adopting a flue gas collection system to collect copper, lead and zinc smelting wastewate...

Embodiment 2

[0078] The preparation method of the sulfoaluminate cement provided by the present embodiment comprises the following steps:

[0079] (a) drying the non-ferrous metal smelting waste with an initial water content of 10wt% at 75°C;

[0080] (b) mixing the non-ferrous metal smelting waste after drying treatment in step (a) with pulverized limestone, bauxite, and calibration raw materials, which are 8 parts of non-ferrous metal smelting waste and 42 parts of limestone by weight ratio. , 20 parts of bauxite and 32 parts of aluminum ash, obtain the mixture and add 15% water for granulation;

[0081] Wherein, the fineness of the crushed limestone and bauxite is to pass through a 0.08mm square-hole sieve, and the sieve surplus is 10%;

[0082] (c) drying the pellets obtained in step (b) to a moisture content of less than 2%, then calcining at 1400° C. for 45 minutes, and in the process of calcining, adopting a flue gas collection system to collect copper, lead and zinc smelting waste...

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Abstract

The invention provides a sulfoaluminate cement prepared by using copper, lead and zinc smelting wastewater sludge and a preparation method thereof, which are mainly prepared from the following raw materials by mass: 2-15% of non-ferrous metal smelting waste after drying treatment. parts, 30-60 parts of limestone, 15-30 parts of bauxite and 3-10 parts of calibration raw materials. The non-ferrous metal smelting waste includes one of the neutralization slag of the sewage acid treatment system in the copper pyro smelting process, and the treatment sludge of the wastewater formed after passing through the sewage acid system in the zinc and lead smelting process. The sulfoaluminate cement provided by the present invention is prepared from limestone, bauxite bauxite and non-ferrous metal smelting waste with gypsum as the main raw material in a predetermined proportion, and has low alkalinity, high early strength, slight expansion, The advantages of good corrosion resistance and frost resistance provide a reasonable solution for the treatment and resource utilization of hazardous wastes generated by the copper-lead-zinc smelting industry, and have good economic, environmental and social benefits.

Description

technical field [0001] The invention relates to the field of harmless disposal and resource utilization of non-ferrous metal smelting waste, in particular copper, lead and zinc smelting wastewater sludge, in particular to a sulfur-aluminum prepared by utilizing copper, lead and zinc smelting wastewater sludge Acid cement and preparation method thereof. Background technique [0002] Sulfoaluminate cement was invented and prepared in China. It began to be produced and used in the 1970s. Now the Portland cement series products are generally referred to as the first series cement, and the aluminate cement series products are generally referred to as the second series cement. Then sulfoaluminate cement and ferroaluminate cement and other cement varieties derived from them are generally referred to as the third series of cement. The mineral composition of this series of cement is characterized by a large amount of C 4 A 3 Minerals, which distinguish it from other series of ceme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/32C04B7/36
CPCC04B7/323C04B7/36Y02P40/10
Inventor 朱阳戈杨航赵庆朝李伟光申士富刘海营王金玲骆有发郑学杰
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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