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Method for production of concrete from water quenched nickel-iron slag

A technology for nickel-iron slag and concrete is applied in the field of comprehensive utilization of non-ferrous metallurgical waste slag resources, which can solve the problems of complicated preparation process and long processing time, and achieve the effects of increasing the dosage, increasing the density and reducing the cost.

Active Publication Date: 2015-11-04
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of ferronickel slag in this method is large, but the ferronickel slag needs to be stabilized first, the preparation process is complicated, and the treatment time is long

Method used

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  • Method for production of concrete from water quenched nickel-iron slag
  • Method for production of concrete from water quenched nickel-iron slag
  • Method for production of concrete from water quenched nickel-iron slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The water-quenched ferronickel slag composition used in embodiment 1 is as shown in table 1:

[0021] Table 1 Composition of water-quenched ferronickel slag in Example 1

[0022] Element Al 2 o 3 SiO 2 MgO Fe 2 o 3 CaO NiO K 2 o Na 2 o content,% 5.30 46.31 24.83 14.48 1.46 0.09 0.12 0.10

[0023] A method for producing concrete by utilizing water-quenched ferronickel slag, comprising the following steps:

[0024] Dry the water-quenched ferronickel slag first, and use the second-stage grinding to finely grind the water-quenched ferronickel slag to less than 5mm, and classify it at 80μm to obtain fine slag with a particle size of less than 80μm and coarse slag with a particle size of more than 80μm. Add sodium carbonate equivalent to 7% of the fine slag mass and 3% gypsum as activators and mix thoroughly. After the fine slag is activated by the activator, it will be used as an auxiliary gel material instead of cement, ...

Embodiment 2

[0028] A kind of method that utilizes water-quenched ferronickel slag to produce concrete, adopts the water-quenched ferronickel slag of embodiment 1, comprises the following steps:

[0029] Dry the water-quenched ferronickel slag, use the second-stage grinding to finely grind the water-quenched ferronickel slag to less than 4mm, and classify it by 90μm to obtain fine slag with a particle size of less than 90μm and coarse slag with a particle size of more than 90μm. Sodium hydroxide with 0.1% of the mass of the fine slag is used as an activator and fully mixed. After the fine slag is activated by the activator, it is used as an auxiliary gel material instead of cement. The coarse slag is used as a fine aggregate instead of part of the sand for concrete preparation. Polycarboxylate-based high-performance water reducer; the ratio and properties of concrete are shown in Table 3:

[0030] Table 3 Example 2 Concrete Ratio and Properties

[0031]

Embodiment 3

[0033] The water-quenched ferronickel slag composition used in embodiment 3 is as shown in table 4:

[0034] Table 4 Composition of water-quenched ferronickel slag in Example 3

[0035] Element Al 2 o 3 SiO 2 MgO Fe 2 o 3 CaO NiO K 2 o Na 2 o content,% 5.89 51.85 32.71 7.26 1.92 0.13 0.08 0.08

[0036] A method for producing concrete by utilizing water-quenched ferronickel slag, comprising the following steps:

[0037] Dry the water-quenched ferronickel slag, grind it finely to less than 5mm, and classify it by 70μm to obtain fine slag with a particle size below 70μm and coarse slag with a particle size above 70μm. Add sodium hydroxide and 2% lime is used as an activator and fully mixed. After being activated by the activator, the fine slag is used as an auxiliary gel material to replace cement, and the coarse slag is used as fine aggregate instead of part of the sand for concrete preparation. ; The proportioning and perf...

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Abstract

The present invention provides a method for production of concrete from water quenched nickel-iron slag, the water quenched nickel-iron slag is dried, finely ground and graded to obtain fine slag and coarse slag, an activator is added into the fine slag and thoroughly mixed, and the fine slag activated by the activator is used as an auxiliary gelling material for replacement of part of cement, the coarse slag is used as a fine aggregate for replacement of part of sands for concrete preparation; per cubic meter of concrete nickel-iron slag comprises, by mass, 150 ~ 472kg of the cement, 30 ~ 260kg of the activated fine slag, 58 ~ 472kg of the coarse slag, 203 ~ 772kg of the sands, and 0 ~ 1250kg of stones; and superplasticizer mass is 0.4% to 2% of the total mass of the gelling material. The method can significantly improve the water quenched nickel-iron slag doping content in the concrete, improves concrete aggregate grading issues and workability, meanwhile increases strength and corrosion resistance of the concrete, and significantly reduces concrete costs.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of nonferrous metallurgical waste slag resources, and in particular relates to a treatment method for water-quenched ferronickel slag, in particular to a method for producing concrete from water-quenched ferronickel slag produced by smelting ferronickel by laterite nickel ore fire method. Background technique [0002] In recent years, with the gradual expansion of the scale of nickel-iron alloy smelting by laterite ore pyrometallurgy, the discharge of nickel-iron slag from laterite nickel ore smelting has gradually increased. In 2011, the annual nickel content of ferronickel alloy in my country reached 250,000 tons, and the accompanying solid waste slag produced exceeded 15 million tons. The total discharge of metallurgical slag accounts for about one-fifth of the total discharge of metallurgical slag, becoming the fourth largest solid waste. The utilization rate of ferronickel ...

Claims

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Application Information

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IPC IPC(8): C04B28/08C04B18/14
CPCY02W30/91
Inventor 吕清华朱纪念陈国举刘万超孔令军孙渊君杨鸿
Owner JINCHUAN GROUP LIMITED
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