A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for removing free calcium oxide and free magnesium oxide through steel slag immobilization, product and application of product
The invention provides a method for removing free calcium oxide and free magnesium oxide through steel slag immobilization, a product and application of the product. The method specifically comprises the following steps: adding a calcium-magnesium immobilization auxiliary agent accounting for 0.5-3% of the mass of the steel slag into the steel slag, mixing, crushing, carrying out ball milling, and levigating to 10-50 meshes; adding the treated steel slag into a hydrothermal reaction kettle, introducing water vapor at 150-200 DEG C for 30-60 minutes, and hydrating the steel slag powder until the water content is 5-20%; and introducing CO2 gas to adjust the pressure in the reaction kettle to 0.2-1.0 MPa, and fully reacting for 30-180 minutes to obtain the steel slag powder with stable performance. According to the method provided by the invention, free calcium oxide and free magnesium oxide in the steel slag powder are further converted into calcium carbonate, magnesium carbonate, calcium silicate, magnesium silicate and other mineral phases under the combined action of CO2 gas and the calcium-magnesium immobilization auxiliary agent, so that the steel slag powder with stable performance is obtained. The whole process is simple and efficient, a large amount of steel slag solid waste can be treated, all performance indexes of the obtained solidified steel slag powder are superior to the quality standard of machine-made sand, and the method has wide application prospects.
本发明提供了一种钢渣固定化去除游离氧化钙和游离氧化镁的方法、产品及其应用。具体包括：在钢渣中加入钢渣质量0.5～3％的钙镁固定化助剂，经混合、粉碎、球磨，磨细至10～50目；将处理后的钢渣加入水热反应釜中，通入150～200℃水蒸气30～60min，将钢渣粉末水化至含水率5～20％；再通入CO2气体将反应釜内压力调整到0.2～1.0MPa，充分反应30～180min，即可得到性能稳定的钢渣粉。本发明提供的方法在CO2气体与钙镁固定化助剂的共同作用下，将钢渣粉末中游离氧化钙和游离氧化镁进一步转化为碳酸钙、碳酸镁、硅酸钙、硅酸镁等矿物相，从而得到性能稳定的钢渣粉。整体工艺简单、高效，能大量处理钢渣固废，得到的固化钢渣粉各项性能指标均优于机制砂质量标准，具有广阔的应用前景。
Method for removing free calcium oxide and free magnesium oxide through steel slag immobilization, product and application of product
The invention provides a method for removing free calcium oxide and free magnesium oxide through steel slag immobilization, a product and application of the product. The method specifically comprises the following steps: adding a calcium-magnesium immobilization auxiliary agent accounting for 0.5-3% of the mass of the steel slag into the steel slag, mixing, crushing, carrying out ball milling, and levigating to 10-50 meshes; adding the treated steel slag into a hydrothermal reaction kettle, introducing water vapor at 150-200 DEG C for 30-60 minutes, and hydrating the steel slag powder until the water content is 5-20%; and introducing CO2 gas to adjust the pressure in the reaction kettle to 0.2-1.0 MPa, and fully reacting for 30-180 minutes to obtain the steel slag powder with stable performance. According to the method provided by the invention, free calcium oxide and free magnesium oxide in the steel slag powder are further converted into calcium carbonate, magnesium carbonate, calcium silicate, magnesium silicate and other mineral phases under the combined action of CO2 gas and the calcium-magnesium immobilization auxiliary agent, so that the steel slag powder with stable performance is obtained. The whole process is simple and efficient, a large amount of steel slag solid waste can be treated, all performance indexes of the obtained solidified steel slag powder are superior to the quality standard of machine-made sand, and the method has wide application prospects.
本发明提供了一种钢渣固定化去除游离氧化钙和游离氧化镁的方法、产品及其应用。具体包括：在钢渣中加入钢渣质量0.5～3％的钙镁固定化助剂，经混合、粉碎、球磨，磨细至10～50目；将处理后的钢渣加入水热反应釜中，通入150～200℃水蒸气30～60min，将钢渣粉末水化至含水率5～20％；再通入CO2气体将反应釜内压力调整到0.2～1.0MPa，充分反应30～180min，即可得到性能稳定的钢渣粉。本发明提供的方法在CO2气体与钙镁固定化助剂的共同作用下，将钢渣粉末中游离氧化钙和游离氧化镁进一步转化为碳酸钙、碳酸镁、硅酸钙、硅酸镁等矿物相，从而得到性能稳定的钢渣粉。整体工艺简单、高效，能大量处理钢渣固废，得到的固化钢渣粉各项性能指标均优于机制砂质量标准，具有广阔的应用前景。
Method for removing free calcium oxide and free magnesium oxide through steel slag immobilization, product and application of product
一种钢渣固定化去除游离氧化钙和游离氧化镁的方法、产品及其应用
LIU YANGSHENG (author) / YI JING (author)
2024-08-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2022
| European Patent Office | 2023
Method for reducing content of free calcium oxide in steel slag and steel slag powder
| European Patent Office | 2024
Device and method for reducing content of free calcium oxide in steel slag
| European Patent Office | 2024