Ferronickel slag fiber stabilizer as well as preparation method and application thereof

A technology of fiber stabilizer and ferronickel slag, which is applied in the field of comprehensive utilization of non-ferrous metal smelting solid waste, can solve the problems of unsuitable fiber stabilizer for road use, poor interface compatibility, insufficient flexibility, etc., to improve high temperature anti-rutting ability, Improved low-temperature cracking resistance and widened the range of options

Inactive Publication Date: 2020-03-27
SHENYANG RES INST OF NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims at the ferronickel slag fiber used in heat preservation, noise reduction and light building materials. Due to the problems of insufficient flexibility and poor interface compatibility, it is not suitable to be used as a road fiber stabilizer. Process improvement and fiber surface modification, a preparation method of nickel-iron slag fiber stabilizer suitable for asphalt mastic macadam (SMA) asphalt pavement is proposed, which is a large-scale consumption of industrial solid waste (nickel-iron slag, fly ash) preparation method

Method used

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  • Ferronickel slag fiber stabilizer as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Firstly, mix ferronickel slag, de-ironized fly ash and lime according to 54%: 28%: 18%, grind until 100% pass through 0.6mm, 80% pass through 0.3mm square hole sieve; sampling raw material mixture for composition Laboratory analysis, according to the results, use KOH to adjust the alkalinity of the raw material mixture to 0.58; send the above-mentioned pretreated raw materials to the submerged arc furnace for melting, set the melting temperature at 1500°C to completely melt, put the slag into the electric heating In the holding furnace, keep warm at 1520°C for 6 hours, put the slag into the centrifugal fiber forming machine; finally, remove the slag balls, collect fibers, and chop through centrifugation, and then modify the surface, the activation index is 0.75, and the fiber produced is single The wire diameter is 6.4 μm, the single wire breaking strength is 1320 MPa, and the shot content is 4.8% (percentage by weight).

[0066] According to the industry standard of th...

Embodiment 2

[0068] Firstly, mix ferronickel slag, de-ironized fly ash and lime according to 62%: 22%: 16%, grind until 100% pass through 0.6mm, 80% pass through 0.3mm square hole sieve; sampling raw material mixture for composition Laboratory analysis, according to the results, use KOH to adjust the alkalinity of the raw material mixture to 0.55; send the above-mentioned pretreated raw materials to the submerged arc furnace for melting, and set the melting temperature to 1500 ° C to completely melt, and put the slag to Electric heat preservation furnace, heat preservation at 1520°C for 6 hours, put the slag into the centrifugal fiber machine; finally, remove the slag ball, collect the fiber, chop, and then modify the surface, the activation index is 0.71, and the fiber produced The diameter of the single filament is 8.2 μm, the breaking strength of the single filament is 1336 MPa, and the content of slag is 3.2% (percentage by weight).

[0069] According to the industry standard of the Pe...

Embodiment 3

[0071] Firstly, mix ferronickel slag, de-ironized fly ash and lime according to 46%: 32%: 22%, grind until 100% pass through 0.6mm, 80% pass through 0.3mm square hole sieve; sampling raw material mixture for composition Laboratory analysis, according to the results, use KOH to adjust the alkalinity of the raw material mixture to 0.62; send the above-mentioned pretreated raw materials to the submerged arc furnace for melting and send them to the submerged arc furnace for melting, and the melting temperature is set at 1400 ° C to fully melt , put the molten slag into the electric heat preservation furnace, heat it at 1480°C for 6 hours, put the molten slag into the centrifugal fiber forming machine; finally, remove the slag ball, collect the fiber, chop, and then modify the surface, the activation index is 0.71, the fiber monofilament diameter is 7.5 μm, the monofilament breaking strength is 1219 MPa, and the shot content is 4.8% (weight percentage).

[0072] According to the in...

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Abstract

The invention relates to a ferronickel slag fiber stabilizer and a preparation method and application thereof, and belongs to the field of non-ferrous metal smelting solid waste comprehensive utilization. The method comprises the following steps: (1) crushing 46-62% of nickel laterite ore ferronickel smelting slag, 22-32% of deironed fly ash and 16-22% of lime, and regulating the alkalinity to 0.55-0.62; (2) melting the raw materials treated in the step (1) at 1400-1500 DEG C, and keeping the temperature at 1480-1520 DEG C to obtain a melt; and (3) preparing fibers from the melt, removing slagballs, collecting the fibers, chopping, and carrying out surface modification. The monofilament diameter of the prepared ferronickel slag fibers is 6.2-9.5 mu m, the monofilament breaking strength is1219-1347 MPa, and the slag ball content is lower than 5%. After surface modification, the activation index of ferronickel slag fibers exceeds 0.7, the high-temperature rutting resistance and low-temperature cracking resistance of a SMA (Stone Mastic Asphalt) mixture can be remarkably improved, and the water stability of the SMA mixture is improved.

Description

technical field [0001] The invention relates to a ferronickel slag fiber stabilizer and a preparation method and application thereof, belonging to the field of comprehensive utilization of nonferrous metal smelting solid waste. Background technique [0002] The ferronickel smelting slag rate of low-grade lateritic nickel ore is as high as 98%, which is mainly disposed of by natural stockpiling. As the domestic demand for nickel-iron alloy continues to increase, nickel-iron slag continues to increase at a rate of 8 to 12 million tons per year. According to incomplete statistics, the cumulative stockpiles of laterite nickel ore smelting slag in my country exceed 100 million tons. A large amount of nickel-iron slag is piled up, seriously polluting the air and water sources, and destroying the natural ecological balance. If it cannot be consumed in large quantities, it will seriously restrict the development of my country's nickel resource industry and threaten the survival of n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/00C03C13/06
CPCC03B37/00C03C13/06
Inventor 田泽峰王奇黎孙伟兵
Owner SHENYANG RES INST OF NONFERROUS METALS
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