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A kind of magnetic flocculant using steel mill red dust as material and its application and usage method

A magnetic flocculant and red dust technology, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, magnetic field/electric field water/sewage treatment, etc., can solve problems such as patent publications that have not yet been found, achieve toxicity reduction, produce Fast speed and efficiency-enhancing effects

Active Publication Date: 2022-02-11
博易环境科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Through the search, no patent publications related to the patent application of the present invention have been found

Method used

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  • A kind of magnetic flocculant using steel mill red dust as material and its application and usage method
  • A kind of magnetic flocculant using steel mill red dust as material and its application and usage method
  • A kind of magnetic flocculant using steel mill red dust as material and its application and usage method

Examples

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Effect test

Embodiment 1

[0035] A kind of magnetic flocculant utilizing red dust from steel mills as material, the preparation steps of said magnetic flocculant are as follows:

[0036] (1) Evenly mix 5g steelmaking red dust with 30ml hydrochloric acid solution with a mass concentration of 6%, and put it on a shaker at 30°C for 8 hours to obtain a preliminary solid-liquid mixed magnetic flocculant.

[0037] (2) Dry the solid-liquid mixed magnetic flocculant obtained in step (1) at 105° C. for 10 h until the liquid disappears, and grind and pulverize the remaining solid to obtain a powdery magnetic flocculant.

[0038] The magnetic flocculant of the present invention is added at a dosage of 0.5 / L, and the turbidity is 200NTU, the phosphorus concentration is 3.5mg / L, and the conductivity is greater than 350μs / cm, using milk, tap water and potassium dihydrogen phosphate to prepare a simulated In the waste water, adjust the pH value to 10 by dilute sulfuric acid and sodium hydroxide solution, and stir rap...

Embodiment 2

[0041] A kind of magnetic flocculant utilizing red dust from steel mills as material, the preparation steps of said magnetic flocculant are as follows:

[0042] (1) Evenly mix 5g of steelmaking red dust with 20ml of sulfuric acid solution with a mass concentration of 15%, and put it on a shaker at 30°C for 6 hours to obtain a preliminary solid-liquid mixed magnetic flocculant.

[0043] (2) Dry the solid-liquid mixed magnetic flocculant obtained in step (1) at 105° C. for 10 h until the liquid disappears, and grind and pulverize the remaining solid to obtain a powdery magnetic flocculant.

[0044]The magnetic flocculant of the present invention is added at a dosage of 0.2 / L, and the turbidity is 200NTU, the phosphorus concentration is 3.5mg / L, and the electrical conductivity is greater than 350μs / cm, using milk, tap water and potassium dihydrogen phosphate to prepare a simulated In the waste water, adjust the pH value to 12 by dilute sulfuric acid and sodium hydroxide solution,...

Embodiment 3

[0047] A kind of magnetic flocculant utilizing red dust from steel mills as material, the preparation steps of said magnetic flocculant are as follows:

[0048] (1) Evenly mix 5g steelmaking red dust with 20ml nitric acid solution with a mass concentration of 30%, and put it on a shaker at 30°C for 8 hours to obtain a preliminary solid-liquid mixed magnetic flocculant.

[0049] (2) Dry the solid-liquid mixed magnetic flocculant obtained in step (1) at 105° C. for 10 h until the liquid disappears, and grind and pulverize the remaining solid to obtain a powdery magnetic flocculant.

[0050] Add the magnetic flocculant of the present invention at a dosage of 0.3 / L to a turbidity of 200 NTU, a phosphorus concentration of 3.5 mg / L, and a conductivity greater than 350 μs / cm, using milk, tap water and potassium dihydrogen phosphate to prepare a simulated In the waste water, adjust the pH value to 5 by dilute sulfuric acid and sodium hydroxide solution, and stir rapidly at a speed of ...

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Abstract

The invention relates to a magnetic flocculant using red dust from steel mills as a material, characterized in that: the preparation steps of the magnetic flocculant are as follows: (1) uniformly mix red dust from steelmaking with acid solution, and put it on a shaker at 20-50°C After reacting for 1-8 hours, the preliminary solid-liquid mixed magnetic flocculant can be obtained; (2) Dry the solid-liquid mixed magnetic flocculant obtained in step (1) at 105°C for 10 hours until the liquid disappears, and grind the remaining solid to obtain powder magnetic flocculant. This magnetic flocculant not only has a good flocculation effect, but also has soft magnetic properties. Through the intervention of an external magnetic field, the flocs produced can quickly settle to the bottom of the liquid, and because the main component is iron, there will be no toxic aluminum salts. Problem, at the same time, the raw material is steelmaking waste, which also greatly reduces the preparation cost of the magnetic flocculant, so that the present invention has dual benefits of environmental protection and economy.

Description

technical field [0001] The invention belongs to the technical field of using industrial waste to treat wastewater, and relates to the secondary utilization of red dust from steelmaking waste and the reduction of sewage turbidity and total phosphorus content, in particular to an inorganic mineral magnetic flocculation material and its application and use method. Background technique [0002] As we all know, with the growing power of China and the rapid development of social economy, people's demand for steel has also greatly increased. The high investment, high return and extensive correlation of upstream and downstream industries in the steel industry have also become the mainstay of my country's economic construction. column. However, the huge annual steel production not only brings huge benefits, but also produces a large number of by-products of steelmaking. Among them, the open hearth furnace dust, that is, the red dust of the steel mill, is a powder collected by the ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/48
CPCC02F1/5236C02F1/488
Inventor 李桂菊王思远郝林林何迎春
Owner 博易环境科技(苏州)有限公司