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A method for high-temperature solidification of lead-containing sludge

A high-temperature solidification and sludge technology, applied in chemical instruments and methods, sludge treatment, fixed/solidified sludge treatment, etc., can solve problems such as the difficulty of solidification of lead-containing sludge

Active Publication Date: 2021-11-23
德兴市益丰再生有色金属有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of difficult solidification of lead-containing sludge in the high-temperature solidification process, and provide a method for high-temperature solidification of lead-containing sludge

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  • A method for high-temperature solidification of lead-containing sludge

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Embodiment 1

[0031] In this embodiment, lead-containing sludge is treated as the treatment object, and waste disposal is carried out through dual solidification treatment of mechanochemical reaction and high-temperature solidification in an oxygen-enriched atmosphere to strengthen the solidification effect of lead. Such as figure 1 As shown, the specific method is as follows:

[0032] Dry lead-containing sludge, iron-containing sludge and diatomite waste residue to reduce the moisture content of lead-containing sludge, iron-containing sludge and diatomite waste residue from 72%, 70% and 42% to 10% respectively Below; and use a ball mill to grind the dried lead-containing sludge, iron-containing sludge and diatomite waste residue to -38μm.

[0033] A portion of fine-grained lead-containing sludge and iron-containing sludge were uniformly mixed in a mass percentage of 10%:90% on a dry basis, and the mixed material was added to a vertical planetary ball mill for grinding for 5 hours at a spe...

Embodiment 2

[0041] In this embodiment, lead-containing sludge is treated as the treatment object, and waste disposal is carried out through dual solidification treatment of mechanochemical reaction and high-temperature solidification in an oxygen-enriched atmosphere to strengthen the solidification effect of lead. The specific method is as follows:

[0042] Dry lead-containing sludge, iron-containing sludge and diatomite waste residue to reduce the moisture content of lead-containing sludge, iron-containing sludge and diatomite waste residue from 72%, 70% and 42% to 10% respectively Below; and use a ball mill to grind the dried lead-containing sludge, iron-containing sludge and diatomite waste residue to -38 μm; the fine-grained lead-containing sludge and iron-containing sludge are mixed at a dry basis mass percentage of 19%:81% uniform, and the mixed material was added to a vertical planetary ball mill for grinding for 5.5 hours at a speed of 620 rpm. Dry the obtained fine-grained grind...

Embodiment 3

[0045] In this embodiment, lead-containing sludge is treated as the treatment object, and waste disposal is carried out through dual solidification treatment of mechanochemical reaction and high-temperature solidification in an oxygen-enriched atmosphere to strengthen the solidification effect of lead. The specific method is as follows:

[0046] Dry lead-containing sludge, iron-containing sludge and diatomite waste residue to reduce the moisture content of lead-containing sludge, iron-containing sludge and diatomite waste residue from 72%, 70% and 42% to 10% respectively Below; and use a ball mill to grind the dried lead-containing sludge, iron-containing sludge and diatomite waste residue to -38 μm; the fine-grained lead-containing sludge and iron-containing sludge are mixed at a dry basis mass percentage of 22%:78% uniform, and the mixed material was added to a vertical planetary ball mill for grinding for 7 hours at a speed of 550 rpm. Dry the obtained fine-grained grindin...

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Abstract

The invention discloses a method for high-temperature solidification of lead-containing sludge. The method includes: (1) drying and grinding lead-containing sludge, iron-containing sludge and diatomite waste residue; (2) uniformly mixing fine-grained lead-containing sludge and iron-containing sludge according to the ratio, and mixing the mixture material for grinding. (3) Dry the obtained fine-grained grinding product, and mix it with diatomite waste slag according to the ratio to obtain the secondary mixed material; (4) Sinter the secondary mixed material under the condition of oxygen-enriched atmosphere, and obtain a solidified body after cooling . The present invention reacts the lead component in the lead-containing sludge with the iron oxide component in the iron-containing sludge to form an iron-lead solid solution through mechanochemical action, so that the volatile lead component is fixed in the hard-volatile iron-lead solid solution; Oxygen-enriched sintering with diatomite waste slag to form a glass body, and secondary solidification of lead in the iron-lead solid solution to achieve high-temperature solidification of lead-containing sludge, and at the same time obtain a variety of solid waste harmless and resourceful co-processing. Effect.

Description

technical field [0001] The invention relates to the field of harmless disposal of heavy metal waste, in particular to a method for high-temperature solidification of lead-containing sludge. Background technique [0002] With the rapid development of lead processing enterprises such as lead smelting, electrolysis and lead (acid) batteries, a large amount of lead-containing wastewater is continuously produced, and a large amount of lead-containing sludge is produced after wastewater treatment. Lead-containing sludge contains a certain amount of lead, and there are also a small amount of other heavy metal ions such as Zn, Cu, Ni and Cr. It is a hazardous waste. If it is not treated, it will easily cause serious pollution to the environment. How to safely dispose of lead-containing sludge has always been a hot spot in the field of environmental engineering. [0003] At present, the harmless disposal process of heavy metal sludge mainly includes chemical stabilization, co-proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/12C02F11/13
CPCC02F11/00C02F11/008C02F11/12
Inventor 章叶飞
Owner 德兴市益丰再生有色金属有限责任公司
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