A kind of preparation method of blast furnace slag-based composite material

A composite material and blast furnace slag technology, which is applied in the field of industrial waste slag recycling and reuse, can solve the problems of high development and utilization cost, low blast furnace slag recycling efficiency, etc., and achieve the effects of efficient preparation, reduction of reaction time and uniform crystal phase.

Active Publication Date: 2022-08-09
NANJING TECH UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing a blast furnace slag-based composite material, making full use of the effective components in the blast furnace slag to prepare a blast furnace slag-based hydroxyapatite-zeolite composite material. The method has strong adaptability and simple process , convenient operation, mild reaction conditions, and high product added value, which solve the problems of high development and utilization costs and low resource efficiency of blast furnace slag existing in the prior art

Method used

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  • A kind of preparation method of blast furnace slag-based composite material
  • A kind of preparation method of blast furnace slag-based composite material
  • A kind of preparation method of blast furnace slag-based composite material

Examples

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Effect test

Embodiment 1

[0034] The blast furnace slag was collected from an iron and steel company in Jiangsu, and its main component content is: SiO 2 29.13%, CaO47.08%, Al 2 O 3 20.59%, MgO 1.11%. The preparation steps of blast furnace slag-based hydroxyapatite-zeolite composite material are as follows:

[0035] (1) uniformly mixing blast furnace slag and sodium hydroxide in a mass ratio of 1:1.3, and melting at 600° C. for 60 min to obtain a molten product;

[0036](2) control reaction system Ca / P mol ratio is under the condition of 10:6, and the molten product of (1) step gained is transferred in there-necked flask and adds 30mL 2.0mol / L disodium hydrogen phosphate solution, stirs homogeneously Then, continue to add 50 mL of 2.0 mol / L NaOH solution, stir vigorously for 1 h at 100 °C, and then crystallize for 6 h;

[0037] (3) After the crystallization is completed in step (2), the product is taken out and filtered, the filter cake is washed with water until neutral, and dried at 80° C. for 3...

Embodiment 2

[0039] The blast furnace slag is the same as in Example 1, and the preparation steps of the blast furnace slag-based hydroxyapatite-zeolite composite material are as follows:

[0040] (1) uniformly mixing blast furnace slag and sodium hydroxide particles in a mass ratio of 1:1.3, and melting at 550 ° C for 60 min to obtain a molten product;

[0041] (2) control reaction system Ca / P mol ratio is under the condition of 10:6, and the molten product of (1) step gained is transferred in there-necked flask and adds 30mL 2.0mol / L sodium dihydrogen phosphate solution, stirs homogeneously Then, continue to add 50 mL of 2.0 mol / L NaOH solution, stir vigorously for 2 h at 100 °C, and then crystallize for 8 h;

[0042] (3) After the crystallization is completed in step (2), the product is taken out for filtration, the filter cake is washed with water until neutral, and dried at 80° C. for 3 hours to obtain a blast furnace slag-based hydroxyapatite-zeolite composite material. The microsco...

Embodiment 3

[0044] The blast furnace slag is the same as in Example 1, and the preparation steps of the blast furnace slag-based hydroxyapatite-zeolite composite material are as follows:

[0045] (1) uniformly mixing blast furnace slag and sodium hydroxide particles in a mass ratio of 1:1.2, and melting at 500° C. for 120 min to obtain a molten product;

[0046] (2) control reaction system Ca / P mol ratio is under the condition of 10:6, and the molten product of (1) step gained is transferred in there-necked flask and adds 30mL 2.0mol / L sodium dihydrogen phosphate solution, stirs homogeneously Then, continue to add 50 mL of 2.0 mol / L NaOH solution, stir vigorously for 2 h at 100 °C, and then crystallize for 6 h;

[0047] (3) After the crystallization is completed in step (2), the product is taken out for filtration, the filter cake is washed with water until neutral, and dried at 80° C. for 3 hours to obtain a blast furnace slag-based hydroxyapatite-zeolite composite material. The microsc...

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Abstract

The invention discloses a preparation method of a blast furnace slag-based composite material, which belongs to the technical field of industrial waste slag recycling and reuse. The present invention mainly comprises the following steps: (1) alkali melting of blast furnace slag, (2) reaction with phosphate, (3) hydrothermal aging to prepare blast furnace slag-based hydroxyapatite-zeolite composite material with high added value, The comprehensive utilization of useful components in blast furnace slag is realized. The method of the invention has the characteristics of strong adaptability, simple process, convenient operation, mild reaction conditions, and high added value of products; the method of the invention uses blast furnace slag as a cheap raw material, which can effectively alleviate the problems caused by the massive accumulation of blast furnace slag. Environmental problems can also reduce the construction and operation costs of the enterprise yard to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of industrial waste slag recycling and reuse, and mainly relates to a preparation method of a blast furnace slag-based composite material, in particular to a preparation method of a blast furnace slag-based hydroxyapatite-zeolite composite material. Background technique [0002] Blast furnace slag, as the main by-product of high furnace ironmaking, is mainly composed of gangue in iron ore, ash in coke, flux and other impurities that cannot enter into pig iron. With the development of my country's iron and steel industry, the discharge of blast furnace slag is increasing day by day, and a large amount of blast furnace slag is discharged and piled. Accumulation will inevitably lead to the occupation of a large number of land resources and environmental pollution and other problems. Therefore, the discharge of blast furnace slag has become a difficult problem for steel production enterprises and society. How to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/32C01B39/02B01J20/18B01J20/30C02F1/28
CPCC01B25/32C01B39/02B01J20/048B01J20/18C02F1/288C01P2004/80C01P2006/90Y02W30/50
Inventor 李昌新喻源张庆武陈婷婷
Owner NANJING TECH UNIV
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