A method for preparing high-activity slag micropowder using citric acid slag

Abstract

The invention discloses a method for preparing highly active slag micropowder using citric acid slag, which belongs to the field of slag micropowder preparation, and is characterized in that 92-98wt% of blast furnace granulated slag and 2-8wt% of citric acid slag are placed in a vertical mill Grinded by the CCP. Compared with the prior art, it has the characteristics of simple process and easy mass production, low material cost and labor cost, and less loss of grinding equipment.

Description

technical field [0001] The invention relates to a method for preparing slag micropowder, in particular to a method suitable for preparing highly active slag micropowder using citric acid slag. Background technique [0002] Slag is waste slag mainly composed of silicates and aluminosilicates produced when iron and steel plants smelt pig iron. For every ton of pig iron produced, 0.3 to 1 ton of slag should be discharged. With the rapid development of my country's industry, smelting waste piles occupy land, pollute and poison soil, water and the atmosphere, seriously affect the ecological environment, and cause obvious or potential economic losses and waste of resources. It is estimated that based on the economic loss of 14.25 yuan per ton of smelting waste piled up, the annual economic loss is 2.85 billion yuan. Therefore, the harmless and resourceful treatment of smelting waste residues is the focus that our country and even countries in the world attach great importance to...

AI Technical Summary

Problems solved by technology

Although this kind of method has increased micropowder specific surface area, and then has improved activity, there are following defects: 1. admixture ratio is as high as 10~30% of slag; 2. admixture formula is complicated, and production cost is high; 3. formula is complicated, Weighing is complicated, so the technical process is not suitable for industrial mass production

[0005] Moreover, slag has poor grindability, high abrasiveness, and complex powder characteristics. During the grinding process, the specific surface area of ​​slag increases very slowly. When the specific surface area is greater than 450m 2 / kg, the output is greatly reduced, and the power consumption is greatly increased

The purpose of the above technology is to "increase the wear resistance of slag", so the conclusion is that the specific surface area is 450-600m 2 Activity index under / kg, for 400~450m 2 The effect of economical slag micropowder within / kg is not obvious

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