Method for preparing inorganic polymer composite aluminum iron zinc coagulant from aluminum plating zincilate

A technology of composite aluminum-iron and coagulant, which is applied in the field of water treatment to achieve excellent coagulation effect, low cost and good storage stability

Inactive Publication Date: 2009-08-05
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using industrial waste galvanized slag as the main raw material to prepare inorganic polymer composite aluminum-iron-zinc coagulant, there is no relevant literature report in the domestic and foreign literature databases.

Method used

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  • Method for preparing inorganic polymer composite aluminum iron zinc coagulant from aluminum plating zincilate
  • Method for preparing inorganic polymer composite aluminum iron zinc coagulant from aluminum plating zincilate
  • Method for preparing inorganic polymer composite aluminum iron zinc coagulant from aluminum plating zincilate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Break 3kg of galvanized slag into medium or fine slag samples. At a temperature of 70°C to 100°C and stirring conditions of 200 rpm to 600 rpm, add 27.8kg of hydrochloric acid solution (20% by mass fraction) and 2.3kg of sulfuric acid solution (40% by mass fraction) Leach into the above block sample, control the leaching time to 3h, and then filter at a temperature of 40°C to 100°C to obtain a filtrate for future use. Under the temperature condition of 20° C. to 60° C., 62.5 kg of sodium hydroxide (40% by mass) solution was added to the above filtrate, the pH value was controlled to 2.8, and the polymerization was carried out for 3 hours to obtain a milky white liquid product.

Embodiment 2

[0021] Break 3kg of galvanized slag into medium or fine slag samples. At a temperature of 70°C to 100°C and stirring conditions of 200 rpm to 600 rpm, 14.2kg of hydrochloric acid solution (10% by mass fraction) and 2.1kg of sulfuric acid solution (20% by mass fraction) were added Leach into the above block sample, control the leaching time to 15h, and then filter at a temperature of 40°C to 100°C to obtain a filtrate for future use. Under the temperature condition of 20° C. to 60° C., 41 kg of sodium hydroxide (20% by mass) solution was added to the above filtrate, the pH value was controlled to 1.5, and the polymerization was carried out for 3 hours to obtain a colorless liquid product.

Embodiment 3

[0023] Break 3kg of galvanized slag into medium or fine slag samples. At a temperature of 70°C to 100°C and stirring conditions of 200 rpm to 600 rpm, add 10.6kg of hydrochloric acid solution (20% by mass fraction) and 1.4kg of sulfuric acid solution (70% by mass fraction) Leach into the above block sample, control the leaching time to 7h, and then filter at a temperature of 40°C to 100°C to obtain the filtrate, which is set aside. Under the temperature condition of 20° C. to 60° C., 30.8 kg of sodium hydroxide (20% by mass) solution was added to the above filtrate, the pH value was controlled to 2.0, and the polymerization was carried out for 3 hours to obtain a colorless liquid product.

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Abstract

The invention relates to a method for preparing an inorganic macromolecular composite aluminum iron zinc coagulating agent by galvanized aluminum slag. The method uses industrial scrap of galvanized aluminum slag as a main raw material and adopts a method of mixed acid leaching and alkalifying copolymerization to produce and prepare the inorganic macromolecular composite aluminum iron zinc coagulating agent with good storage stability, excellent coagulating effect and low cost. The course of a preparation process is at normal atmosphere; the temperature of a reaction kettle is between 20 and 100 DEG C; and equipment and the process course are simple, economic and applicable. The prepared composite aluminum iron zinc coagulating agent is a multifunctional inorganic composite water treatment agent which has aluminum salt for removing a colloid substance, iron salt for removing an organic substance, heavy metal and other pollutants and zinc salt with strong flocculation capacity; and compared with a conventional coagulating agent, the coagulating effect is improved by 15 to 30 percent. The appearance of a liquid product is white or ivory-white liquid; and the appearance of a solid product is white or pale yellow solid. The composite aluminum iron zinc coagulating agent can be widely applied to urban water supply and sewage, industrial water supply, wastewater treatment and other fields.

Description

technical field [0001] The invention belongs to the technical field of water treatment and relates to a method for preparing an inorganic polymer composite aluminum-iron-zinc coagulant by using galvanized slag. Background technique [0002] In recent decades, with the rapid development of industry, agriculture and economy, the problem of water environment has become increasingly serious, and the shortage of water resources has become an important factor restricting the sustainable development of our country. In order to alleviate the crisis of water resources, improve water utilization rate and water treatment efficiency, and realize a good social cycle of water, it is necessary to strengthen research on water purification treatment. The coagulation process is a basic method for removing suspended solids and colloidal particles from water to achieve solid-liquid separation, and is one of the most commonly used unit operations in many water treatment technologies. To a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 付英冯岩张春菊张玉伟王珍
Owner UNIV OF JINAN
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