Preparation method used for sintering of building ceramsite from electroplating sludge

A technology of electroplating sludge and ceramsite, which is applied in the field of recycling of hazardous waste, can solve the problems of destroying the ecological environment and not conforming to the sustainable development strategy, and achieve the effect of reducing the concentration of leaching, reducing the risk of environmental pollution, and low cost

Pending Publication Date: 2019-11-19
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, my country's ceramsite is mainly clay and shale ceramsite, and the source of clay raw materials is mostly from cultivated land, and shale ceramsite raw materials must be excavated from mountains to destroy the ecological environment, which is not in line with the sustainable development strategy

Method used

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  • Preparation method used for sintering of building ceramsite from electroplating sludge
  • Preparation method used for sintering of building ceramsite from electroplating sludge
  • Preparation method used for sintering of building ceramsite from electroplating sludge

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preparation example Construction

[0029] Such as figure 1 Shown, the preparation method of a kind of electroplating sludge sintered ceramsite of the present invention comprises the steps:

[0030] (1) Dry the electroplating sludge, mica sand, and aluminum sludge to constant weight respectively, grind them into powder and sieve through an 80-mesh sieve;

[0031] (2) mixing and stirring electroplating sludge, mica sand, and aluminum sludge evenly to obtain ceramsite raw materials;

[0032] (3) adding 3% to 5% sodium silicate solution as a ceramsite binder to the ceramsite raw material obtained in step (2), mixing and granulating to obtain raw ceramsite;

[0033] (4) Put the raw ceramsite obtained in step (3) into a muffle furnace at a heating rate of 10ºC / min, first raise the temperature to 105ºC for 1 hour, then raise the temperature to 500ºC for preheating for 15 minutes, and finally raise the temperature to 1200ºC Sintering for 25min;

[0034] (5) Let the sintered ceramsite slowly cool down to room tempera...

Embodiment 1

[0042] The invention discloses a preparation method of electroplating sludge sintered ceramsite. The raw material of the ceramsite is composed of 15% of electroplating sludge, 65% of mica sand and 20% of aluminum sludge.

[0043] (1) Place the electroplating sludge, mica sand, and aluminum sludge in an oven at 105°C to dry to constant weight, grind them into powder and sieve through an 80-mesh sieve for use;

[0044] (2) mixing and stirring electroplating sludge, mica sand, and aluminum sludge in proportion to obtain ceramsite raw materials;

[0045] (3) adding 3% to 5% sodium silicate solution as a ceramsite binder to the ceramsite raw material obtained in step (2), mixing and granulating to obtain raw ceramsite;

[0046](4) Put the raw ceramsite obtained in step (3) into a muffle furnace at a heating rate of 10ºC / min, first raise the temperature to 105ºC for 1 hour, then raise the temperature to 500ºC for preheating for 15 minutes, and finally raise the temperature to 1200ºC...

Embodiment 2

[0053] The invention discloses a method for preparing electroplating sludge sintered ceramsite. The raw materials of the ceramsite are composed of 20% of electroplating sludge, 60% of mica sand and 20% of aluminum sludge.

[0054] (1) Place the electroplating sludge, mica sand, and aluminum sludge in an oven at 105°C to dry to constant weight, grind them into powder and sieve through an 80-mesh sieve for use;

[0055] (2) mixing and stirring electroplating sludge, mica sand, and aluminum sludge in proportion to obtain ceramsite raw materials;

[0056] (3) adding 3% to 5% sodium silicate solution as a ceramsite binder to the ceramsite raw material obtained in step (2), mixing and granulating to obtain raw ceramsite;

[0057] (4) Put the raw ceramsite obtained in step (3) into a muffle furnace at a heating rate of 10ºC / min, first raise the temperature to 105ºC for 1 hour, then raise the temperature to 500ºC for preheating for 15 minutes, and finally raise the temperature to 1200...

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Abstract

The invention discloses a preparation method used for sintering of building ceramsite from electroplating sludge. The ceramsite raw materials comprise 50 to 70% of micaceous sand (gold mine separationtailing), 20% of water supply plant aluminium sludge, and 10 to 30% of electroplating industrial park electroplating sludge. The preparation method comprises following steps: the raw materials are dried, crushed, and grinded for pretreatment, and are mixed to be uniform, 3 to 5% of sodium silicate solution is added as a ceramsite binder, mixing granulation is carried out to obtain raw ceramsite;and then drying, pre-heating, sintering, and cooling are carried out to obtain the ceramsite. According to the preparation method, aluminium sludge and micaceous sand are adopted to replace clay to provide Al2O3 and SiO2, the electroplating sludge is adopted to provide a fluxing agent, so that ceramsite manufacturing cost is reduced obviously, the prepared ceramsite is high in compression strength, and low in leaching toxicity; large scale processing of electroplating sludge and water supply plant sludge can be realized; harmlessness treatment of harmful waste is realized; resource utilizationis realized; electroplating sludge and aluminium sludge processing cost is saved; and the obtained product can be taken as building material, and excellent economical benefit and social benefit are achieved.

Description

technical field [0001] The invention relates to the technical field of recycling hazardous waste and sludge waste utilization, in particular to a preparation method of electroplating sludge sintered ceramsite. Background technique [0002] Electroplating sludge refers to the by-products produced in the process of electroplating wastewater treatment. Since electroplating wastewater contains various strong acids, strong alkalis and metal solutions, and even toxic and harmful chemicals such as cyanide and chromic anhydride, electroplating sludge is copper, chromium, etc. , nickel and other heavy metal oxide-based precipitates. The annual output of electroplating sludge in my country is millions of tons, and its main pollutants are various heavy metals. If it is not disposed of properly, it will cause secondary pollution to the environment. Electroplating sludge is a very clear and toxic solid waste in the national hazardous waste list. Nowadays, the common disposal method of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B18/02
CPCC04B35/62204C04B35/622C04B18/027C04B2235/3418C04B2235/656C04B2235/5427C04B2235/606C04B2235/6562C04B2235/6567
Inventor 景奕鸣孙英杰赵建伟
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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