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High-activity metallurgical slag composite micro powder and preparation method thereof

A metallurgical slag, high activity technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor stability, poor performance, coarse fineness, etc., achieve good stability and improve physical properties , the effect of less impurities

Pending Publication Date: 2021-11-19
GUANGXI YUFENG CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such artificial ash and fly ash have shortcomings such as coarse fineness, low activity, poor performance, and poor stability. Therefore, many cement companies and concrete mixing plants stop after only a period of time.

Method used

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  • High-activity metallurgical slag composite micro powder and preparation method thereof
  • High-activity metallurgical slag composite micro powder and preparation method thereof
  • High-activity metallurgical slag composite micro powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing the above-mentioned high-activity metallurgical slag composite micropowder, comprising the following steps:

[0033] (1) Pulverized coal preparation: crush the bulk coal into pulverized coal below 5mm;

[0034] (2) Material drying: transport the pulverized coal to the fluidized fluidized furnace for combustion. The temperature of the hot air provided by the fluidized fluidized furnace is 250°C. The heat generated by the pulverized coal in the fluidized fluidized furnace dries Liugang slag, Bayi slag and converter slag;

[0035] (3) Raw material grinding: in terms of weight percentage, the main material and additive are mixed according to a certain weight ratio. Powder activator, the addition of mineral powder activator is 0.1% of the weight of the main material, and the mineral powder activator consists of diethylene glycol, triethanolamine, polycarboxylate water reducer and calcium hydroxide according to the mass ratio of 3:4:2: 1 Mixed composit...

Embodiment 2

[0037] A method for preparing the above-mentioned high-activity metallurgical slag composite micropowder, comprising the following steps:

[0038] (1) Pulverized coal preparation: crush the bulk coal into pulverized coal below 5mm;

[0039] (2) Material drying: transport the pulverized coal to the fluidized fluidized furnace for combustion. The temperature of the hot air provided by the fluidized fluidized furnace is 255°C. The heat generated by the pulverized coal in the fluidized fluidized furnace dries Liugang slag, Bayi slag and converter slag;

[0040] (3) Raw material grinding: in terms of weight percentage, the main material and additive are mixed according to a certain weight ratio. Powder activator, the addition of mineral powder activator is 0.08% of the weight of the main material, and the mineral powder activator consists of diethylene glycol, triethanolamine, polycarboxylate water reducer and calcium hydroxide according to the mass ratio of 2:5:1: 1 Mixing compos...

Embodiment 3

[0042] A method for preparing the above-mentioned high-activity metallurgical slag composite micropowder, comprising the following steps:

[0043] (1) Pulverized coal preparation: crush the bulk coal into pulverized coal below 5mm;

[0044] (2) Material drying: transport the pulverized coal to the fluidized fluidized furnace for combustion. The temperature of the hot air provided by the fluidized fluidized furnace is 260°C. The heat generated by the pulverized coal in the fluidized fluidized furnace dries Liugang slag, Bayi slag and converter slag;

[0045] (3) Raw material grinding: in terms of weight percentage, the main material and additive are mixed according to a certain weight ratio. Powder activator, the addition of mineral powder activator is 0.09% of the weight of the main material, and the mineral powder activator consists of diethylene glycol, triethanolamine, polycarboxylate water reducer and calcium hydroxide according to the mass ratio of 4:3:3: 1 Mixing compos...

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Abstract

The invention provides high-activity metallurgical slag composite micro powder and a preparation method thereof, and belongs to the technical field of building materials. The high-activity metallurgical slag composite micro powder is prepared from a main body material and an additive. The preparation method of the high-activity metallurgical slag composite micro powder comprises the following technical steps: (1) preparing coal powder; (2) drying materials; and (3) grinding the raw materials. The high-activity metallurgical slag composite micro powder has high activity, good stability and excellent performance, can be used as an admixture of cement or concrete to form a good hydraulic cementing material with the cement or concrete, improves the physical properties of the cementing material, reduces the hydration heat, enables the cementing material to be tightly combined, improves the compactness of the cementing material, achieves the effect of improving the performance of cement or concrete, reduces the production cost of cement or concrete, and reduces the environmental pollution of steelmaking enterprises. The preparation method is simple, low in cost and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-activity metallurgical slag composite micropowder and a preparation method thereof. Background technique [0002] Steel slag is the waste slag produced in the metallurgical industry, and its production rate is 8-15% of the crude steel output. With the rapid development of my country's iron and steel industry, the amount of steel slag produced is increasing rapidly. Steel slag occupies land and pollutes the environment. Today, our country advocates saving resources, developing a circular economy, protecting the ecological environment, strengthening the comprehensive utilization of resources, realizing zero emissions in steelmaking enterprises, and turning waste slag from steelmaking into treasure. [0003] The main mineral composition of steel slag is tricalcium silicate, dicalcium silicate, calcium magnesium olivine, free lime (f-CaO), etc. Low valu...

Claims

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Application Information

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IPC IPC(8): C04B20/04C04B20/02C04B18/14
CPCC04B20/04C04B20/023C04B18/141C04B18/142C04B20/02Y02W30/91
Inventor 隆盛康覃金英邓玉莲蒋杉平刘骥杨义唐小春陆金海古巧燕韦显文韦宏常
Owner GUANGXI YUFENG CEMENT
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