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Slag micro powder machining process

A technology of slag micro-powder and processing technology, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., to achieve the effects of reducing power consumption per unit production, significant economic efficiency, and small maintenance

Inactive Publication Date: 2013-01-23
遵义县华磊节能科技有限公司
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  • Application Information

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Problems solved by technology

However, the surface area of ​​slag powder is required to reach 600m 2 / kg or more, there are very few domestic manufacturers that can meet the requirements

Method used

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  • Slag micro powder machining process
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Embodiment Construction

[0013] Slag fine powder is a powdery product obtained by superfine grinding the slag discharged from the ironmaking blast furnace with a small amount of grinding aid. Its main component is SiO 2 、Al 2 o 3 , CaO, etc., all have high activity. Incorporate it into cement concrete as an admixture, these active SiO 2 、Al 2 o 3 C 2 S and C 2 The hydration products produced by S hydration are filled in the voids of cement concrete, which greatly increases the density of cement concrete, and at the same time, the lower strength Ca(OH) 2 The crystals are converted into calcium silicate hydrate gel with higher strength, so that a series of properties of cement concrete are significantly improved.

[0014] The invention provides a processing technology of slag micropowder. The processing flow is as follows: firstly, the slag is squeezed and pulverized by a roller press from a hopper, and then enters a dispersing classifier for sorting, and the fine material (particle size ≤ 2 mm)...

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Abstract

The invention relates to a slag micro powder machining process. The machining process comprises the following steps that: firstly slag is fed from a hopper, extruded and ground by a roller press, and then enters a grading machine for grading, and the slag with the grain diameter smaller than or equal to 2 mm is fed into a ball mill cement grinding system for grinding; the slag with the grain diameter bigger than or equal to 2 mm is returned to the roller press for re-extruding; and at one end of the outlet of the ball mill cement grinding system, dust is collected by a dust collector and discharged by an exhaust fan, the other end of the outlet of the ball mill cement grinding system is a ground slag micro powder discharge port, and slag micro powder enters a containing box through the discharge port so as to be packaged. The machining process provided by the invention has the great characteristics that the edge effect of the roller press is eliminated, and the requirements for supersaturated feeding of the roller press are met; and the yield is increased by over 60% compared with a primary closed-loop process of an ordinary ball mill, so that not only is the economic benefit remarkable, but also the operating cost is low and the maintenance quantity is small.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a processing technology of slag micropowder. [0002] Background technique [0003] With the continuous development of my country's national economic construction, the demand for building concrete is increasing, and slag powder as an admixture can not only reduce its production cost, but also has considerable economic value. At the same time, slag resources can be used to solve environmental protection problems, which fully conforms to the strategic guidelines and requirements of my country's sustainable development. Because the mixing of slag powder can make concrete have good mechanical properties and stability, it is widely used in large-volume water conservancy projects, high-strength and long-span bridges and high-rise buildings, and plays an indispensable role in economic construction. [0004] The comprehensive utilization of slag in the cement ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/12
CPCY02W30/91
Inventor 徐志斌
Owner 遵义县华磊节能科技有限公司
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