A steel slag filter material for sponge city construction and preparation method thereof

A sponge city and steel slag technology, applied in the field of solid waste resource utilization, to achieve the effects of controlling emptying time, saving social building material resources, and meeting water quality control requirements

Active Publication Date: 2020-01-14
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to use simple processing and process control means for the rainwater filter medium that needs to be used in the side drainage type bioretention tank and has controllable water permeability effect, certain pollutant removal function, and low cost. Steel slag The filter material used to meet the needs of side drainage bioretention tanks effectively solves the problem of resource utilization of industrial waste such as steel slag, reduces social resource consumption, and has important economic and environmental benefits

Method used

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  • A steel slag filter material for sponge city construction and preparation method thereof
  • A steel slag filter material for sponge city construction and preparation method thereof
  • A steel slag filter material for sponge city construction and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] A steel slag filter material used for sponge city construction, its process flow chart is shown in figure 1 , its preparation method comprises the following steps:

[0038] 1) The steel slag used as raw material is the converter steel slag treated by the hot pouring method. The converter steel slag is crushed, iron-selected and sieved to collect the part less than 5mm, and then add water according to the liquid-solid ratio (mass ratio) of 1:3 and place it in a high-pressure reactor inside, heated to 150°C for 12 hours for hydrothermal treatment, and then naturally cooled to room temperature;

[0039]2) Filter the reaction product obtained in the reaction kettle, and reuse the filtrate for the next hydrothermal treatment, and dry the obtained solid product at 105° C. for 4 hours, and set aside;

[0040] 3) using a ball mill to perform ball milling on the dried solid product, and the ball milling time is 8 hours;

[0041] 4) Sieve the steel slag after ball milling, and ...

Embodiment 2

[0051] A kind of steel slag filter material that is used for sponge city construction, its preparation method comprises the following steps:

[0052] 1) The steel slag used as the raw material is the converter steel slag treated by the drum method. The converter steel slag is crushed, iron-selected and sieved to collect the part less than 5mm, and then add water according to the liquid-solid ratio (mass ratio) of 1:3 and put it in the high-pressure reactor , heated to 180 ° C for 10 h for hydrothermal treatment, and then naturally cooled to room temperature;

[0053] 2) Filter the reaction product obtained in the reaction kettle, and reuse the filtrate for the next hydrothermal treatment, and dry the obtained solid product at 105° C. for 4 hours, and set aside;

[0054] 3) using a ball mill to perform ball milling on the dried solid product, and the ball milling time is 6 hours;

[0055] 4) Sieve the steel slag after ball milling, and separate four steel slags larger than 35 ...

Embodiment 3

[0065] A kind of steel slag filter material that is used for sponge city construction, its preparation method comprises the following steps:

[0066] 1) The steel slag used as the raw material is the converter steel slag treated by the drum method. The converter steel slag is crushed, iron-selected and sieved to collect the part less than 5mm, and then add water according to the liquid-solid ratio (mass ratio) of 1:3 and put it in the high-pressure reactor , heated to 160 ° C for 16 hours for hydrothermal treatment, and then naturally cooled to room temperature;

[0067] 2) Filter the reaction product obtained in the reaction kettle, and reuse the filtrate for the next hydrothermal treatment, and dry the obtained solid product at 105° C. for 4 hours, and set aside;

[0068] 3) using a ball mill to perform ball milling on the dried solid product, and the ball milling time is 10 hours;

[0069] 4) Sieve the steel slag after ball milling, and separate four steel slags larger tha...

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Abstract

The invention discloses a preparation method of a slag filter material for sponge city construction. Slag is processed into the metallurgical residue filter material for sponge city construction and subjected to hydrothermal, ball milling and grading design, rainwater infiltration can be decelerated so as to realize staggered discharging, and evacuation time of a biological retention system can becontrolled beneficially. The slag filter material with a porous particle structure is alkaline to some extent, great in removal effect on pollutants such as suspensions and heavy metals in rainwaterand beneficial to protection of a water environment in the biological retention system. By hydrothermal treatment of slag, subsequent ball milling for powdering is benefited, slag alkalinity is lowered, and the problem of hazards to surrounding soil environments due to high alkalinity of the slag filter material is avoided. The slag filter material is capable of meeting the requirement of water safety of the biological retention system in sponge city construction, recycling of current industrial wastes such as slag is effectively realized, and significant economic and environmental benefits are achieved.

Description

technical field [0001] The invention belongs to the resource utilization of solid waste, and in particular relates to a steel slag filter material used for sponge city construction and a preparation method thereof. Background technique [0002] Sponge city construction is an important development direction of national urban construction. The country invests a lot of money in sponge city construction every year. It plans to complete the construction and transformation of sponge cities in 20% of the national urban built-up areas by 2020, and complete 80% of the national urban built-up areas by 2030. . [0003] Bioretention is the main component of the sponge city construction green space system, and it is responsible for the important functions of rainwater storage and water purification. Flood-tolerant and drought-tolerant plants are often planted in bioretention ponds, such as calamus, reed, water onion, dry umbrella grass, rush grass, cattail, etc. The landscape effect of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/06
CPCB01D39/06B01D2239/10
Inventor 康凌晨王志雄曹利勇徐隆辉吴寅卢丽君刘瑛熊家剑周许林韩斌
Owner 武汉钢铁有限公司
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