Harmless resource utilization method of zinc electrolysis acid leaching residue

An electrolytic zinc acid leaching, harmless technology, applied in sustainable waste treatment, cement production, solid waste management and other directions, can solve the problems of large investment and long process, achieve simple disposal methods, reduce environmental resources and energy consumption and environmental pollution, and the effect of eliminating heavy metal pollution and hidden dangers

Active Publication Date: 2016-01-13
湖南省小尹无忌环境能源科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0059] Other methods mainly include all-wet process and heap leaching, which have been applied in some domestic enterprises, but they have the disadvantages of long process and large investment, and have not yet been applied on a large scale.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] A method for recycling and harmless utilization of electrolytic zinc acid leaching slag: take fresh wet zinc acid leaching slag from a factory, use commercially available P.O42.5 Portland cement powder as the silicate powder, and change The active agent is selected from commercially available silica fume, sodium polyphosphate (a kind of polymeric phosphate), polymerized silica sol, and sodium rosinate microfoam. Zinc acid leaching slag, Portland cement powder, modifier by mass ratio zinc acid leaching slag 83%: silicate powder 12%: modifier (silica fume 3.75%+sodium polyphosphate 0.2%+polysilicon Sol 1% + Sodium Rosinate Microfoam 0.05%) 5% of the ingredients, mixed with a mixer to form a plastic microfoam slurry.

[0084] The plastic micro-foam slurry is poured into a 600×200×250mm block, cured by natural curing, the average compressive strength of 7 days is 7.9MPa, the average compressive strength of 28 days is 11.3MPa, the softening coefficient is 0.98, and the dry d...

Embodiment 2

[0086] A method for recycling and harmless utilization of electrolytic zinc acid leaching slag: take fresh wet zinc acid leaching slag from a factory, use commercially available P.C32.5 grade Portland cement powder as the silicate powder, and change The active agent is selected from commercially available diatomite powder, potassium polyphosphate (a kind of polymer phosphate), and polymerized silica sol. Zinc acid leaching slag, Portland cement powder, modifier by mass ratio zinc acid leaching slag 65%: silicate powder 25%: modifier (diatomite powder 8%+potassium polyphosphate 0.3%+ Polymerized silica sol 1.7%) and 10% of the ingredients are mixed evenly by a mixer to form a slurry-like cementing material.

[0087] Mix the paste-like cement and crushed stone sand evenly according to the mass ratio of paste-like cement 1: crushed stone-sand 3, and shape it into a block of 240×115×53mm, which is naturally cured and cured, with an average resistance of 7 days. Compressive streng...

Embodiment 3

[0090] A method for recycling and harmless utilization of electrolytic zinc acid leaching slag: take fresh wet zinc acid leaching slag from a factory, use commercially available aluminate cement powder as the aluminate powder, and use commercially available aluminate cement powder as the modifier Silica fume, sodium polyphosphate (polyphosphate), sodium metaaluminate, sodium rosinate microfoam. Zinc acid leaching slag, aluminate cement powder, modifier by mass ratio zinc acid leaching slag 70%: aluminate powder 20%: modifier (silica fume 8% + sodium polyphosphate 0.2% + partial aluminum Sodium acid sodium 1.75% + sodium rosin acid microfoam 0.05%) 10% of the ingredients, mixed with a mixer to form a plastic microfoam slurry.

[0091] The plastic micro-foam slurry is poured into a 600×200×250mm block, cured by natural curing, the average compressive strength of 7 days is 9.7MPa, the average compressive strength of 28 days is 13.4MPa, the softening coefficient is 0.96, and the d...

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Abstract

The invention discloses a harmless resource utilization method of zinc electrolysis acid leaching residue. The harmless resource utilization method comprises following steps: by mass, 60 to 92 parts of fresh zinc electrolysis acid leaching residue, 7 to 38 parts of a silicate powder material or an aluminate powder material, and 1 to 10 parts of a modifier are subjected to mixing, moulding, and curing so as to obtain water-resistant building material products. The harmless resource utilization method is simple and practical; no secondary pollution is caused; heavy metal pollution and hidden danger caused by zinc electrolysis acid leaching residue are eliminated permanently; the harmless resource utilization method is beneficial for water and soil environmental protection; a water-resistant salt corrosion-resistant cementing material and building material products can be produced via effective utilization of zinc electrolysis acid leaching residue; excellent materials are provided for construction work; and environmental source and energy consumption and environmental pollution caused by production process of conventional cementing materials and building material products are reduced greatly.

Description

technical field [0001] The invention relates to the field of environmental protection and waste utilization, in particular to a method for resourceful and harmless utilization of electrolytic zinc acid leaching residue. Background technique [0002] Electrolytic zinc is an indispensable metal material in modern economic construction. However, the pollution of environmental water and soil caused by the waste residue produced in the production process of electrolytic zinc—zinc acid leaching residue has been shocking. It has already triggered a large number of mass incidents and caused The government attaches great importance to it, and the effective treatment of zinc slag has become a major problem in many local environments. It has also been included in the national 863 key project research and has been accepted. However, the treatment of electrolytic zinc acid leaching slag in various places has so far been limited to building and filling Extraction of valuable metals from b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B7/153C04B18/14
CPCY02P40/10Y02W30/91
Inventor 尹小林
Owner 湖南省小尹无忌环境能源科技开发有限公司
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