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High-activity composite ferronickel slag cementing material and preparation method thereof

A technology of cementitious material and ferronickel slag, which is applied in the field of highly active composite ferronickel slag cementitious material and its preparation, can solve the problems of low gelatinity and slow gelation, increase the strength of the system, and accelerate hydration , Improving the effect of the ability to resist chloride ion penetration

Inactive Publication Date: 2020-04-28
福建源鑫环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the gelling property of ferronickel slag needs to be treated by grinding and active activation, and the content of basic oxides in the ferronickel slag powder is low, so its gelling property is far lower than that of cement. very slowly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 20g of blast furnace ferronickel slag, 10g of submerged arc furnace ferronickel slag, 5g of steel slag, and 5g of quartz powder, stir and mix at 40-60°C for 50-60min to obtain functional particles;

[0031] Mix the functional granules with 0.3g of a composite activator, cure in high-pressure steam at 60-80°C for 12 hours, dry at 95°C for 2 hours, mix and grind, and sieve. The composite activator includes lithium hydroxide and sulfuric acid in equal parts by mass. calcium, aluminum sulfate;

[0032] The above mixture, 3g of gypsum admixture, and 0.1g of sodium lignosulfonate at normal temperature are used to obtain the composite nickel-iron slag thermal cementitious material, and the fineness standard of the composite nickel-iron slag thermal cementitious material is that the specific surface area is 450 -600m 2 / kg.

[0033] After the gel material is obtained, the performance test of the gel material is carried out, and its performance index conforms to the prov...

Embodiment 2

[0035] Weigh 50g of blast furnace nickel-iron slag, 30g of submerged arc furnace nickel-iron slag, 20g of steel slag, 10g of quartz powder and stir at 40-60°C for 50-60min to obtain functional particles;

[0036] Mix the functional granules with 0.8g of a composite activator, and after 12 hours of high-pressure steam curing at 60-80°C, dry at 95°C for 2 hours, mix and grind, and sieve. The composite activator includes sodium hydroxide, oxidized Calcium, sodium sulfate, water glass;

[0037] Above-mentioned mixture, 5g gypsum admixture, 0.2g sodium dodecylbenzene sulfonate under normal temperature, obtain described composite ferronickel slag thermal cementitious material, the fineness standard of described composite nickel-iron slag thermal cementitious material is The surface area is 450-600m 2 / kg.

[0038] After the gel material is obtained, the performance test of the gel material is carried out, and its performance index conforms to the provisions of GB / T18046-2017 "Gran...

Embodiment 3

[0040] Weigh 30g of blast furnace nickel-iron slag, 20g of submerged arc furnace nickel-iron slag, 10g of steel slag, 10g of quartz powder and stir and mix at 40-60°C for 50-60min to obtain functional particles;

[0041] Mix the functional granules with 0.5g of a composite activator, and after 12 hours of high-pressure steam curing at 60-80°C, dry at 95°C for 2 hours, mix and grind and sieve, wherein the composite activator includes potassium hydroxide, Calcium, Potassium Sulfate, Potassium Aluminum Sulfate, Water Glass;

[0042]The above mixture and 4g gypsum, 0.15g sodium dodecylbenzenesulfonate at normal temperature, obtain the composite nickel-iron slag thermal cementitious material, the fineness standard of the composite nickel-iron slag thermal cementitious material is that the specific surface area is 450 -600m 2 / kg.

[0043] After the gel material is obtained, the performance test of the gel material is carried out, and its performance index conforms to the provisio...

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Abstract

The invention discloses a high-activity composite ferronickel slag cementing material which comprises the following components in parts by mass: 3-5 parts of gypsum, 5-10 parts of quartz powder, 20-50parts of blast furnace ferronickel slag, 10-30 parts of submerged arc furnace ferronickel slag, 5-20 parts of steel slag, 0.3-0.8 part of composite excitant and 0.1-0.2 part of drag reducer. The composite excitant comprises at least three of alkali metal hydroxide, an alkali metal calcium source, sulfate and water glass. The utilization rate of ferronickel slag is increased, the gel performance is good and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of metallurgical slag treatment, in particular to a high-activity composite nickel-iron slag cementitious material and a preparation method thereof. Background technique [0002] Ferronickel slag is the granulated solid waste slag obtained by quenching and cooling the discharged molten slag after the reduction and extraction of metallic nickel and iron in the industrial ferronickel smelting process. There are two types of nickel-iron slag from electric furnace and blast furnace nickel-iron slag. It has become the smelting industrial waste with the fourth largest emission in our country. The effective utilization rate of this huge solid waste is very low, and most of it is still discarded or landfilled, which will not only waste resources and occupy land, but may also The pollution and destruction of the environment also restrict the development of the ferronickel industry to a certain extent. Therefore, the resource ...

Claims

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Application Information

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IPC IPC(8): C04B7/21C04B12/00
CPCC04B7/21C04B12/005Y02P40/10
Inventor 陈尚鸿胡宗辉郭汉彬张德长罗永斌
Owner 福建源鑫环保科技有限公司
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