CN106830236A - A kind of preparation method of modified Polyaluminium iron diatomite flocculant - Google Patents

A kind of preparation method of modified Polyaluminium iron diatomite flocculant Download PDF

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Publication number
CN106830236A
CN106830236A CN201510890978.4A CN201510890978A CN106830236A CN 106830236 A CN106830236 A CN 106830236A CN 201510890978 A CN201510890978 A CN 201510890978A CN 106830236 A CN106830236 A CN 106830236A
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China
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modified
diatomite
iron
polyaluminium iron
acid
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Pending
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CN201510890978.4A
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Chinese (zh)
Inventor
牟连春
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Qingdao Macro Composite Weaving Co Ltd
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Qingdao Macro Composite Weaving Co Ltd
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Priority to CN201510890978.4A priority Critical patent/CN106830236A/en
Publication of CN106830236A publication Critical patent/CN106830236A/en
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Abstract

A kind of preparation method of modified Polyaluminium iron diatomite flocculant, belongs to technical field of sewage.The present invention is from the pureed dregs containing ferro-aluminum composition, acid pickle, acid sludge by-product solid waste, acidic waste mixture, obtain Polyaluminium iron diatomite, modified by manganese sulfate, iron chloride, filtering, dry, roasting obtain modified Polyaluminium iron diatomite flocculant.Raw material of the present invention refines the pureed dregs containing ferro-aluminum composition, acid pickle, acid sludge by-product solid waste, the acidic waste produced in the production technology for extracting diatom using diatom original soil, improves material utilization, reduces waste water, waste sludge discharge;It is modified by manganese sulfate, iron chloride, effectively improves the diatomaceous specific surface area of Polyaluminium iron and pore volume, improves water treatment effect.

Description

A kind of preparation method of modified Polyaluminium iron diatomite flocculant
Technical field
The present invention relates to a kind of preparation method of modified Polyaluminium iron diatomite flocculant, belong to technical field of sewage.
Background technology
In the terra silicea purificata production process of traditional diatom original soil, mechanical admixture, clay, all kinds of organic-inorganics are usually removed Compound.Main method is cleaned for the stirring that first adds water, and suspend precipitation, separates all impurity beyond removal diatomite.In water washing In process treatment process, after being extracted diatomite, substantial amounts of waste water and silt particle shape impurity can be produced, while also separating major part The metal oxide such as aluminium, iron for going out matter is discharged with silt particle;Then, the diatomite for extracting is activated with acid or alkali washing by soaking again Refined, removal washes the metal oxides such as the ferro-aluminum that is difficult to remove with water, obtains purer activation diatom shell.Pickling refined raw During product, sulfuric acid and hydrochloric acid (easily producing yellow) are generally used, consumption is the diatomite after washing:Sour (sulfuric acid)=1: 1 cooperation, then add suitable water immersion fine purifiation.The acidic metal oxide and highly concentrated spent acid for adding total acid content can be produced in theory, Then by acid waste liquid, acid sludge alkali and after dump.The bronsted lowry acids and bases bronsted lowry added in production turns into slaine, it is impossible to withdraw, no It is disposable, all waste, cause serious environmental pollution.Both increase production and waste processing cost, added value of product is influenceed again The raising of benefit.Using the diatomite refined production technology of washing pickling, after extracting 60% or so diatom shell, can retain down Carry out nearly 1/3 waste residue;The elemental composition amount such as ferro-aluminum that the waste residue is concentrated, gathers than diatom original soil on theoretical value and increased nearly 3 Times or so, ferro-aluminum content will be the fine raw material for producing flocculant up to 30%-60% or so in waste residue.
By rational method of modifying, above-mentioned diatomite modified is processed, increasing specific surface area and pore volume can be applied effectively To in field of waste water treatment, material utilization is improved, reduce waste water, waste sludge discharge.
The content of the invention
It is an object of the invention to provide a kind of preparation method of modified Polyaluminium iron diatomite flocculant.
Technical scheme includes as follows:
The preparation method of the modified Polyaluminium iron diatomite flocculant of the present invention is comprised the following steps:
(1) the pureed dregs containing ferro-aluminum composition, acid pickle, acid sludge by-product solid waste are separately added into enamel reaction still Thing, acidic waste, obtain mol ratio for ferro-aluminum:Acid:Water=10:33:300 mixed solution, in 50-150 DEG C of temperature Insulated and stirred synthetic reaction under the conditions of degree, reaction time 4-10 hours, adds CaO to neutralize, and adjustment pH value cures 3-10 in 2-5.5 Hour, it is filtrated to get Polyaluminium iron diatomite;
(2) by manganese sulfate, both iron chloride according to mol ratio 1-3:3-1 mixes, and a certain amount of distilled water is added in mixture simultaneously Stir, obtain the modifier solution that concentration is 0.6-1.2mol/L;
(3) it is 4-5 according to solid-liquid weight ratio in the case of stirring:A certain amount of Polyaluminium iron diatomite is added modifying agent molten by 100 In liquid, to be filtered after 100-300rpm stirrings 2-6h under normal temperature, modified Polyaluminium iron diatomite filter cake is obtained;
(4) dried under the conditions of modified Polyaluminium iron diatomite filter cake being placed in into 110-130 DEG C 1-1.5 days, then by modified Polyaluminium iron silicon Diatomaceous earth is placed in heater, with 5-25 DEG C of min-1Heating rate be heated to 300-600 DEG C and be incubated 3-8h after, Temperature fall Cooling, obtains final product modified Polyaluminium iron diatomite flocculant.
The beneficial effects of the invention are as follows:
Raw material of the present invention using diatom original soil refine extract diatom production technology in produce the pureed dregs containing ferro-aluminum composition, Acid pickle, acid sludge by-product solid waste, acidic waste, improve material utilization, reduce waste water, waste sludge discharge; It is modified by manganese sulfate, iron chloride, effectively improves the diatomaceous specific surface area of Polyaluminium iron and pore volume, improves water treatment effect.
Specific embodiment
Describe specific embodiment of the invention in detail below in conjunction with technical scheme.
(1) the pureed dregs containing ferro-aluminum composition, acid pickle, acid sludge by-product solid waste are separately added into enamel reaction still Thing, acidic waste, obtain mol ratio for ferro-aluminum:Acid:Water=10:33:300 mixed solution, in 90 DEG C of temperature strips Insulated and stirred synthetic reaction under part, in 6 hours reaction time, adds CaO to neutralize, and adjustment pH value is cured 7 hours in 3-4, filtering Obtain Polyaluminium iron diatomite;
(2) by manganese sulfate, both iron chloride according to mol ratio 2:1 mixing, adds a certain amount of distilled water and stirs in mixture Uniformly, the modifier solution that concentration is 0.9mol/L is obtained;
(3) it is 5 according to solid-liquid weight ratio in the case of stirring:A certain amount of Polyaluminium iron diatomite is added modifier solution by 100 In, to be filtered after 200rpm stirrings 5h under normal temperature, obtain modified Polyaluminium iron diatomite filter cake;
(4) dried 1 day under the conditions of modified Polyaluminium iron diatomite filter cake being placed in into 110 DEG C, be then placed in modified Polyaluminium iron diatomite In heater, after being heated to 450 DEG C and insulation 5 with the heating rate of 15 DEG C of min-1, Temperature fall cooling is obtained final product modified poly- Ferro-aluminum diatomite flocculant.

Claims (1)

1. a kind of preparation method of modified Polyaluminium iron diatomite flocculant, it is characterised in that described modified Polyaluminium iron diatomite wadding The preparation method of solidifying agent is comprised the following steps:
(1) the pureed dregs containing ferro-aluminum composition, acid pickle, acid sludge by-product solid waste are separately added into enamel reaction still Thing, acidic waste, obtain mol ratio for ferro-aluminum:Acid:Water=10:33:300 mixed solution, in 50-150 DEG C of temperature Insulated and stirred synthetic reaction under the conditions of degree, reaction time 4-10 hours, adds CaO to neutralize, and adjustment pH value cures 3-10 in 2-5.5 Hour, it is filtrated to get Polyaluminium iron diatomite;
(2) by manganese sulfate, both iron chloride according to mol ratio 1-3:3-1 mixes, and a certain amount of distilled water is added in mixture simultaneously Stir, obtain the modifier solution that concentration is 0.6-1.2mol/L;
(3) it is 4-5 according to solid-liquid weight ratio in the case of stirring:A certain amount of Polyaluminium iron diatomite is added modifying agent molten by 100 In liquid, to be filtered after 100-300rpm stirrings 2-6h under normal temperature, modified Polyaluminium iron diatomite filter cake is obtained;
(4) dried under the conditions of modified Polyaluminium iron diatomite filter cake being placed in into 110-130 DEG C 1-1.5 days, then by modified Polyaluminium iron silicon Diatomaceous earth is placed in heater, with 5-25 DEG C of min-1Heating rate be heated to 300-600 DEG C and be incubated 3-8h after, Temperature fall Cooling, obtains final product modified Polyaluminium iron diatomite flocculant.
CN201510890978.4A 2015-12-04 2015-12-04 A kind of preparation method of modified Polyaluminium iron diatomite flocculant Pending CN106830236A (en)

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CN201510890978.4A CN106830236A (en) 2015-12-04 2015-12-04 A kind of preparation method of modified Polyaluminium iron diatomite flocculant

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108609671A (en) * 2018-01-12 2018-10-02 常州华禹环保科技有限公司 Diatomite modified PSAF-CPAM composite flocculation agents and preparation method thereof
CN108975474A (en) * 2018-09-25 2018-12-11 湖南烯富环保科技有限公司 Shield muddy water solid-liquid quick separating modified inorganic flocculant and method of modifying and application

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108609671A (en) * 2018-01-12 2018-10-02 常州华禹环保科技有限公司 Diatomite modified PSAF-CPAM composite flocculation agents and preparation method thereof
CN108975474A (en) * 2018-09-25 2018-12-11 湖南烯富环保科技有限公司 Shield muddy water solid-liquid quick separating modified inorganic flocculant and method of modifying and application

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Application publication date: 20170613