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Composite water-treatment coagulant prepared from high-iron gibbsite and preparation method thereof

A high-speed rail trihydrate and coagulant technology, which is applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem that high-speed rail trihydrate bauxite has not been effectively developed and utilized , energy consumption, large dust and coal pollution, difficult separation of iron and aluminum, etc., to overcome the poor stability of iron salt coagulants, good turbidity removal effect, and small pH change in water treatment.

Inactive Publication Date: 2016-06-08
付春平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The typical chemical composition content (%) of Hainan high-speed iron bauxite is: Al 2 o 3 Fe content: 30-50%, Fe content: 10-40%. Due to the iron-aluminum intercalation and close symbiosis in high-iron bauxite, it is extremely difficult to separate iron and aluminum. So far, high-iron bauxite has not been effectively development and utilization of
The research on the comprehensive utilization of high-speed iron bauxite has been carried out for many years at home and abroad, and there have been iron-aluminum separation methods, aluminum-first-iron methods, and iron-after-aluminum methods. Alkali and Al 2 o 3 The characteristics of the reaction are carried out, that is, the iron in the high-iron bauxite is converted into iron ore through ore dressing to enter the steel plant, or through strong alkali and Al 2 o 3 The aluminum element in the high-iron bauxite is recycled by reaction, while the iron in the aluminum ore is discharged as red mud and cannot be used
In the traditional production process of water treatment agent, because the raw materials are clay ore and boehmite ore, which have poor reactivity with acid, they must be activated by roasting at 700-900°C before use, so energy consumption, dust and combustion Coal pollutes a lot, and another disadvantage is that only about 28% of light burnt materials such as clay ore and boehmite can be extracted, and the residue is about 68%. The overall cost is high

Method used

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  • Composite water-treatment coagulant prepared from high-iron gibbsite and preparation method thereof
  • Composite water-treatment coagulant prepared from high-iron gibbsite and preparation method thereof
  • Composite water-treatment coagulant prepared from high-iron gibbsite and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 Aluminum chloride hot metal treatment coagulant

[0040] Described aluminum chloride molten iron treatment coagulant is calculated by weight parts by following component:

[0041] 100 parts of high-speed iron bauxite;

[0042] 350 parts of industrial hydrochloric acid;

[0043] 45 parts of water;

[0044] The preparation of the aluminum chloride hot metal treatment coagulant comprises the following process steps:

[0045] The mined high-iron bauxite is washed with water or screened by a vibrating sieve to separate the laterite to obtain relatively pure high-iron bauxite, and its main component content is controlled: Al 2 o 3 ≥30%, Fe≥10%; grind and crush the above-mentioned high-iron bauxite through a 100-mesh sieve for later use, and take 100 parts of high-iron bauxite powder as the calculation basis, and first go to the normal room with a stirring and heating device Add 45 parts of water to the pressure reaction tank, then add 350 parts of industrial h...

Embodiment 2

[0046] Embodiment 2 Aluminum chloride hot metal treatment coagulant

[0047] Described aluminum chloride molten iron treatment coagulant is calculated by weight parts by following component:

[0048] 100 parts of high-speed iron bauxite;

[0049] 330 parts of industrial hydrochloric acid;

[0050] 50 parts of water;

[0051] The preparation of the aluminum chloride hot metal treatment coagulant comprises the following process steps:

[0052] The mined high-iron bauxite is washed with water or screened by a vibrating sieve to separate the laterite to obtain relatively pure high-iron bauxite, and its main component content is controlled: Al 2 o 3 ≥30%, Fe≥10%; grind and crush the above-mentioned high-iron bauxite through an 80-mesh sieve for later use; take the reaction of 100 parts of high-iron bauxite powder as the calculation basis, and first go to the normal room with a stirring and heating device Add 50 parts of water into the pressure reaction tank, then add 330 parts...

Embodiment 3

[0053] Embodiment 3 Aluminum chloride hot metal treatment coagulant

[0054] Described aluminum chloride molten iron treatment coagulant is calculated by weight parts by following component:

[0055] 100 parts of high-speed iron bauxite;

[0056] 340 parts of industrial hydrochloric acid;

[0057] 47 parts of water;

[0058] The preparation of the aluminum chloride hot metal treatment coagulant comprises the following process steps:

[0059] The mined high-iron bauxite is washed with water or screened by a vibrating sieve to separate the laterite to obtain relatively pure high-iron bauxite, and its main component content is controlled: Al 2 o 3 ≥30%, Fe≥10%; grind and crush the above-mentioned high-iron bauxite through a 120-mesh sieve for later use; take the reaction of 100 parts of high-iron bauxite powder as the accounting basis, and first go to the normal room with a stirring and heating device Add 47 parts of water into the pressure reaction tank, then add 340 parts ...

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Abstract

The invention discloses a composite water-treatment coagulant prepared from high-iron gibbsite and a preparation method thereof. The composite water-treatment coagulant is an aluminum chloride molten iron treatment coagulant, aluminum sulfate molten iron treatment coagulant or polyaluminum chloride molten iron treatment coagulant, which is respectively prepared from high-iron gibbsite, technical hydrochloric acid and water, or high-iron gibbsite, technical hydrochloric acid, water and calcium aluminate powder, or high-iron gibbsite, commercial sulfuric acid and water. The invention also discloses a preparation method of the composite water-treatment coagulant prepared from high-iron gibbsite. The composite water-treatment coagulant has the advantages of wide raw material sources, high iron content, high stability, wide water treatment range, favorable turbidity removal effect, simple preparation method, no need of roasting in the production process, no wastewater or waste gas emission and no environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and in particular relates to a composite water treatment coagulant prepared by using high-iron trihydrate bauxite and a preparation method thereof, which are applied to the purification treatment of domestic drinking water, domestic sewage and industrial waste water. Background technique [0002] At present, with the continuous development of my country's alumina industry, the demand for aluminum ore resources is increasing, especially the trihydrate bauxite with low iron and high aluminum-silicon ratio suitable for the Bayer process, basically all Rely on imports. The bauxite in my country is mainly insoluble diaspore type, and the trihydrate type bauxite that has been discovered is mainly distributed in Guangxi, Fujian, Hainan and other places in my country, and its national reserves exceed 100 million tons. Small scale, wide distribution, and many co-generated (associated) componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 付春平李润生
Owner 付春平
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