A kind of nickel-iron slag oxalate chemically bonded cementitious material

A technology of oxalate chemistry and nickel-iron slag, applied in the field of building materials, can solve the problems of unfavorable construction operation, fast solidification speed and high price, and achieve the effects of improving solidification speed, reducing preparation cost and reducing construction difficulty.

Active Publication Date: 2020-07-10
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnesium phosphate chemically bonded cementitious material solidifies too fast at high temperatures, which is not conducive to construction operations, and it is not fast enough at extremely low temperatures
In addition, the raw material used in the preparation process of magnesium phosphate chemical bonding materials is magnesium oxide, which is expensive as a chemical reagent.

Method used

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  • A kind of nickel-iron slag oxalate chemically bonded cementitious material
  • A kind of nickel-iron slag oxalate chemically bonded cementitious material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) The ferronickel slag oxalate chemically bonded cementitious material is composed of 1000g of ferronickel slag and 350g of acidic component (oxalic acid); the ferronickel slag is ground through an 80-mesh sieve, and the sieve residue is less than 5%;

[0020] (2) Sample preparation: Weigh the corresponding materials in step (1), add 330g of water, mix and stir for 3 minutes, quickly pour into a 20mm×20mm×20mm six-unit mold, and vibrate on a vibrating table to form nickel Iron slag oxalate chemically bonded material sample; the setting time of the test is 30 minutes, the sample is demoulded after 3 hours of molding, and the compressive strength is tested by natural curing to a certain age; the 3d compressive strength of the sample is 30.86MPa.

Embodiment 2

[0022] (1) The nickel-iron slag oxalate chemically bonded cementitious material is composed of nickel-iron slag 1000g, acid component (oxalic acid) 350g, retarder (boric acid) 60g; The amount is less than 5%.

[0023] (2) Preparation of the sample: Weigh the corresponding material in step (1), add 310g of water to mix and stir for 3 minutes, quickly pour it into a 20mm×20mm×20mm six-unit mold, and vibrate on a vibrating table to form nickel Iron slag oxalate chemically bonded material sample; test its coagulation time is 55min, demold the sample after 3 hours of molding, and use natural curing method to cure to a certain age to test its compressive strength; the 3d compressive strength of the sample is 33.45MPa, The SEM of this embodiment material sees figure 2 , it can be seen from the figure that the loose irregular particles of ferronickel slag ( figure 1 ) reacts with the acidic component and retarder, and connects with the product gel as a whole to form a hardened body...

Embodiment 3

[0025] (1) The nickel-iron slag oxalate chemically bonded cementitious material is composed of nickel-iron slag 1000g, acid component (oxalic acid) 400g, retarder (boric acid) 100g; The amount is less than 5%.

[0026] (2) Preparation of sample: Weigh the corresponding material in step (1), add 300g of water to mix and stir for 3 minutes, quickly pour it into a 20mm×20mm×20mm six-unit mold, and vibrate on a vibrating table to form nickel Iron slag oxalate chemically bonded material sample; the setting time of the test is 70min, the sample is demoulded after 3 hours of molding, and the compressive strength is tested by natural curing to a certain age; the 3d compressive strength of the sample is 31.68MPa.

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Abstract

The invention discloses a nickel-ferrite slag oxalate chemical bonding cementing material and belongs to the technical field of building materials. The chemical bonding cementing material is preparedfrom the ingredients in parts by weight: 100 parts of nickel-ferrite slag and 25 to 45 parts of acid ingredient. When being stirring and mixed with water, the cementing material has excellent performance of controllable coagulation speed, quickness in hardening, high early strength, quick low-temperature coagulation speed, wear resistance, good frost resistance, small dry shrinkage and the like. Compound metal oxide in the nickel-ferrite slag is utilized to prepare the oxalate chemical bonding cementing material, so that material preparation cost is reduced; meanwhile, a novel way for resourcefully utilizing the nickel-ferrite slag in high efficiency is provided; the method has certain environment-friendly and economical benefits.

Description

technical field [0001] The invention relates to a ferronickel slag oxalate chemically bonded cementitious material, which belongs to the technical field of building materials. Background technique [0002] Nickel-iron slag is a kind of granulated slag formed by water quenching of the waste discharged from laterite nickel ore during the smelting process of extracting metal nickel or nickel-iron alloy. Although it has similar active components of aluminum and silicon to blast furnace slag and fly ash, due to the difference in smelting raw materials and processes, the chemical composition of ferronickel slag produced is different from blast furnace slag and fly ash, resulting in comprehensive utilization rate Low, only 10%. According to statistics, the amount of ferronickel slag discharged in my country reaches more than 15 million tons every year, and the accumulated stockpiles over the years are nearly 100 million tons, accounting for about 1 / 5 of the total metallurgical sla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCC04B28/005C04B2201/50C04B18/144C04B24/04C04B22/0013
Inventor 罗中秋周新涛王敬冬王昊
Owner KUNMING UNIV OF SCI & TECH
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