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Method for preparing aluminium iron polychloride floculant

A technology of polyaluminum chloride and iron floc, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effects of process innovation, product stability, and consumption saving

Inactive Publication Date: 2007-03-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing reports on the method of preparing composite inorganic flocculants, blast furnace gas ash is used as the main raw material to prepare polyaluminum ferric chloride flocculant (PAFC), and there is no relevant literature report in the domestic and foreign literature databases.

Method used

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  • Method for preparing aluminium iron polychloride floculant

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Effect test

Embodiment 1

[0028] As shown in Figure 1, the preparation of composite inorganic macromolecule flocculant polyaluminum ferric chloride liquid product by using steel mill waste blast furnace gas ash comprises the following steps:

[0029] (1) Raw material selection: the Fe 2 o 3 The content is 24.32%, Al 2 o 3 Steel plant waste blast furnace gas ash with a content of 8.42% is naturally air-dried and passed through a 60-mesh sieve for subsequent use;

[0030] (2) Laboratory preparation of blast furnace gas ash dissolution solution: take 50g blast furnace gas ash, put it into a 500mL four-neck flask with a stirrer, thermometer and reflux device, add 2gNaF, and add 6mL mass percentage concentration while stirring. 49% HNO 3 To oxidize the ferrous iron in the blast furnace gas ash, use a hydrochloric acid solution with a mass percent concentration of 18% at a gray-acid ratio of 1:3 and a reaction temperature of 100-105°C for 3 hours to make the iron in the material , aluminum is dissolved ...

Embodiment 2

[0034] The method for preparing polyaluminum ferric chloride liquid flocculant by using steel mill waste blast furnace gas ash comprises the following steps:

[0035] (1) Raw material selection: the Fe 2 o 3 The content is 21.2%, Al 2 o 3Steel plant waste blast furnace gas ash with a content of 7.8% is passed through a 60-mesh sieve after natural air-drying, and is set aside;

[0036] (2) Laboratory preparation of blast furnace gas ash dissolution solution: take 50g blast furnace gas ash, put it into a 500mL four-neck flask with a stirrer, thermometer and reflux device, add 2gNaF, and add 6mL mass percentage concentration while stirring. 49% HNO 3 To oxidize the ferrous iron in the blast furnace gas ash, use a hydrochloric acid solution with a mass percent concentration of 18% at a gray-acid ratio of 1:4 and a reaction temperature of 70 to 85°C for 2 hours to make the iron in the material , aluminum is dissolved in the liquid phase to the greatest extent, and then suction...

Embodiment 3

[0040] The method for preparing polyaluminum ferric chloride liquid flocculant by using steel mill waste blast furnace gas ash comprises the following steps:

[0041] (1) Raw material selection: the Fe 2 o 3 The content is 25.2%, Al 2 o 3 Steel plant waste blast furnace gas ash with a content of 8.8% is passed through a 60-mesh sieve after natural air-drying, and is set aside;

[0042] (2) Laboratory preparation of blast furnace gas ash dissolution solution: take 50g blast furnace gas ash, put it into a 500mL four-neck flask with a stirrer, thermometer and reflux device, add 2gNaF, and add 6mL mass percentage concentration while stirring. 49% HNO 3 To oxidize the ferrous iron in the blast furnace gas ash, use a hydrochloric acid solution with a mass percent concentration of 18% at a gray-acid ratio of 1:2 and a reaction temperature of 50 to 65°C, and stir for 4 hours to make the iron in the material , aluminum is dissolved in the liquid phase to the greatest extent, and t...

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PUM

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Abstract

The invention discloses a polyaluminium iron chloride flocculant preparing method, comprising the steps of: selecting raw materials, preparing blast furnace gas dust solution, preparing Al(OH)3 sol, and preparing polyaluminium iron chloride flocculant; and the prepared product is a compound organic high molecular flocculant and has characters of aluminum and iron salts, and has excellent water purifying performance and wide application range. And it provides a feasible way of synthetically utilizing the wastes of the steel mills and provides a process route with cheap raw materials for flocculant production, achieving the purpose of processing wastes with wastes, and obtaining good economic, social and environmental benefits.

Description

technical field [0001] The invention relates to a production method of an inorganic macromolecule flocculant, in particular to a method for preparing a composite inorganic macromolecule flocculant—polyaluminum ferric chloride—using steel mill waste blast furnace gas ash as a main raw material. Background technique [0002] Blast furnace gas ash is the particle produced by the dust of the raw fuel brought out by the blast furnace gas (also known as gas) and the intense reaction in the high temperature zone during the ironmaking process of the ironmaking blast furnace. Its main components are carbon particles, elemental iron and its oxides. , in addition to SiO 2 、Al 2 o 3 etc., is one of the main solid emissions from iron and steel enterprises. In recent years, my country's iron and steel output has leapt to the first place in the world. The total amount of blast furnace gas ash produced by ironmaking blast furnaces is quite large. Calculated as 1.7% of iron production, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 李善评范思思
Owner SHANDONG UNIV
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