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Blast furnace slag modification method

A blast furnace slag modification technology, applied in chemical instruments and methods, inorganic chemistry, water/sludge/sewage treatment, etc., can solve problems such as low utilization rate of blast furnace slag, environmental pollution, waste of resources, etc., and improve comprehensive utilization Level, convenient and cheap raw materials, and improved adsorption performance

Inactive Publication Date: 2017-08-01
INNER MONGOLIA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a blast furnace slag modification method, which solves the problems of low utilization rate of existing blast furnace slag, environmental pollution and waste of resources caused by a large amount of accumulation

Method used

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  • Blast furnace slag modification method

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Embodiment 1

[0018] Embodiment 1 of the present invention provides a modification method of blast furnace slag, comprising the following steps:

[0019] S1. Add dropwise hydrochloric acid with a concentration of 2 mol / L to the original blast furnace slag soil, and fully magnetically stir for 30 minutes to obtain a mixture, wherein the material-liquid ratio of the original blast furnace slag soil and hydrochloric acid is 1g:10mL;

[0020] S2. Add the templating agent CTBA (cetyltrimethylamine bromide) to the mixture obtained in S1 and fully magnetically stir for 30 minutes to dissolve, then place the CTBA-dissolved mixture in the reactor for hydrothermal reaction, hydrothermal The reaction temperature is 160°C, the reaction time is 16h, and the molar ratio of CTBA to blast furnace slag soil is 2:8;

[0021] S3. Cool the product after the hydrothermal reaction to room temperature, then filter, wash and dry to obtain modified blast furnace slag.

Embodiment 2

[0023] Embodiment 2 of the present invention provides a modification method of blast furnace slag, comprising the following steps:

[0024] S1. Add dropwise hydrochloric acid with a concentration of 1 mol / L to the original blast furnace slag soil, and fully magnetically stir for 20 minutes to obtain a mixture, wherein the material-liquid ratio of the original blast furnace slag soil and hydrochloric acid is 1g:5mL;

[0025] S2. Add template agent CTBA to the mixture obtained in S1 and fully magnetically stir for 20 minutes until dissolved, then place the dissolved CTBA mixture in a reactor for hydrothermal reaction. The hydrothermal reaction temperature is 140°C and the reaction time is 12h. , wherein, the molar ratio of CTBA and blast furnace slag raw soil is 2:6;

[0026] S3. Cool the product after the hydrothermal reaction to room temperature, then filter, wash and dry to obtain modified blast furnace slag.

Embodiment 3

[0028] Embodiment 3 of the present invention provides a modification method of blast furnace slag, comprising the following steps:

[0029] S1. Adding hydrochloric acid with a concentration of 5 mol / L dropwise to the blast furnace slag raw soil, and fully magnetically stirring for 20 minutes to obtain a mixture, wherein the solid-liquid ratio of the blast furnace slag raw soil and hydrochloric acid is 1g:15mL;

[0030] S2. Add the template agent CTBA to the mixture obtained in S1 and fully magnetically stir it for 40 minutes until it dissolves. After that, place the dissolved CTBA mixture in a reactor for hydrothermal reaction. The hydrothermal reaction temperature is 180°C and the reaction time is 20h. , wherein, the molar ratio of CTBA and blast furnace slag raw soil is 2:10;

[0031] S3. Cool the product after the hydrothermal reaction to room temperature, then filter, wash and dry to obtain modified blast furnace slag.

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Abstract

The invention discloses a blast furnace slag modification method, and relates to the technical field of material modification. According to the method, hydrochloric acid is dropwise added into blast furnace slag original soil; full stirring is performed; a mixture is obtained; a template agent CTBA is added into the obtained mixture and is fully stirred till the dissolution; then, the mixture dissolved with the CTBA is put into a reaction kettle for hydrothermal reaction; the mixture subjected to hydrothermal reaction is cooled; then, suction filtration, washing and drying are performed; modified blast furnace slag is obtained. The blast furnace slag modification method has the advantages that the method is simple; the raw materials are convenient and cheap; the blast furnace slag original soil can be modified at low temperature; the energy consumption is low; the absorption performance of the modified blast furnace slag is better improved.

Description

technical field [0001] The invention relates to the technical field of material modification, in particular to a method for modifying blast furnace slag. Background technique [0002] Blast furnace slag is the waste discharged from the blast furnace in the process of metallurgical pig iron, and it is one of the main metallurgical waste slags in my country at the present stage. Before the 1970s, it had been piled up as industrial waste, and with the rapid development of the iron and steel industry, the accumulation of blast furnace slag was increasing day by day. Industrial waste slag accounts for 14% of the total annual output. The accumulation of a large amount of blast furnace slag not only causes serious pollution to the environment, but also is a serious waste of resources. However, blast furnace slag is a very valuable secondary resource. Therefore, it has become a research hotspot at home and abroad to seek new ways to utilize blast furnace slag resources and to use b...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/30
CPCB01J20/103C02F1/281C02F2101/30
Inventor 赵斯琴娜米拉长山庄晓娟王海刘静温馨
Owner INNER MONGOLIA NORMAL UNIVERSITY
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