A kind of modification processing method of ferronickel slag aggregate

A treatment method, the technology of ferronickel slag, which is applied in the field of building materials, can solve the problems of high crushing value of ferronickel slag aggregate, accelerate cement, etc., and achieve the effects of reducing risk, accelerating hydration, and high activity

Active Publication Date: 2021-08-17
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a modification treatment method of nickel-iron slag aggregate, through the modification treatment of the present invention, the pores and active components on the surface of nickel-iron slag aggregate are destroyed, and the problem of nickel-iron slag aggregate is solved. Iron slag aggregate has a high crushing value and potential alkali-aggregate reaction problems. At the same time, the ferronickel slag aggregate treated by the invention is used as an admixture after being ground, which can accelerate the hydration of cement and improve the strength of cement concrete. strength

Method used

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  • A kind of modification processing method of ferronickel slag aggregate

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Effect test

Embodiment 1

[0023] Modification method of nickel-iron slag aggregate, including the following steps:

[0024] 1) Sieves> 5mm nickel-iron slag aggregate;

[0025] 2) Pouring the nickel iron slag aggregate of the above screen to cement, sodium hydroxide, and water; wherein the ratio of the total mass of the cement and sodium hydroxide and the ratio of the nickel iron slag aggregate is 4: 1, The water ash is 0.4; where the amount of sodium hydroxide is 5% of cement quality;

[0026] 3) Step 2) The test block is evaporated at 80 ° C;

[0027] 4) Steam 24 h under the pressure of 1.5 MPa under pressure.

[0028] 5) Step 4) Try the block, screen, sieved, sieved, bonegite greater than 5 mm, used as concrete aggregate, and less than 5 mm component grinding to a specific surface area greater than 400m 2 / kg is used as concrete blend.

Embodiment 2

[0030] Modification method of nickel-iron slag aggregate, including the following steps:

[0031] 1) Sieves> 5mm nickel-iron slag aggregate;

[0032] 2) Pouring the nickel iron slag aggregate from the above-mentioned sieve with cement, sodium hydroxide, and water; wherein the ratio of the total mass of the cement and sodium hydroxide and the mass of the nickel iron residue aggregate is 2: 3. The water ash ratio is 0.6; where the amount of sodium hydroxide is 1% of cement quality;

[0033] 3) Step 2) The test block is evaporated at 80 ° C;

[0034] 4) Steam 24 h under the pressure of 1.5 MPa under pressure.

[0035] 5) Step 4) Try the block, screen, sieved, sieved, bonegite greater than 5 mm, used as concrete aggregate, and less than 5 mm component grinding to a specific surface area greater than 400m 2 / kg is used as concrete blend.

Embodiment 3

[0037] Modification method of nickel-iron slag aggregate, including the following steps:

[0038] 1) Sieves> 5mm nickel-iron slag aggregate;

[0039] 2) Pouring the nickel iron slag aggregate of the above screen to cement, sodium hydroxide, potassium hydroxide, and water; in which cement and sodium hydroxide and total quality of potassium hydroxide are nickel with nickel The ratio of mass is 2: 3, the water as average ratio is 0.5; wherein the amount of sodium hydroxide and potassium hydroxide is 5% of cement quality, sodium hydroxide and potassium hydroxide is 3: 2;

[0040] 3) Step 2) The test block is evaporated at 80 ° C;

[0041] 4) Steam 12h under pressure of 3.0 MPa in pressure of 3.0 MPa;

[0042] 5) Step 4) Try the block, screen, sieved, sieved, bonegite greater than 5 mm, used as concrete aggregate, and less than 5 mm component grinding to a specific surface area greater than 400m 2 / kg is used as concrete blend.

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Abstract

The invention discloses a modification treatment method of ferronickel slag aggregate, which is characterized in that the processing steps are as follows: (1) mixing the ferronickel slag aggregate, cement, additives and water and then pouring into molding; (2) pressing Steam under steaming conditions for 6h~24h; (3) crush and sieve the test blocks obtained in step 2), and screen out the aggregates larger than 5mm to be used as concrete aggregates, and the ingredients smaller than 5mm to be finely ground for concrete blending material. Through the modification treatment of the present invention, the pores and active components on the surface of the ferronickel slag aggregate are destroyed, and the problems of high crushing value of the ferronickel slag aggregate and potential alkali-aggregate reaction are solved. The iron slag aggregate is ground and used as an admixture, which can accelerate the hydration of cement and improve the strength of cement concrete.

Description

Technical field [0001] The present invention relates to the technical field of building materials, and more particularly to a modified treatment method of nickel-iron slag aggregate. Background technique [0002] Nickel Iron Slag is a industrial by-product produced in the nickel mine process of 1000 ~ 1600 ° C, which can be divided into blast furnace nickel and electric arc nickel according to its production process. At present, most of my country's nickel-residue is the electric arc furnace nickel, some of the smelting temperatures of some manufacturers are 1000 ~ 1200 ° C. Due to the large amount of cultivation slag, each smelting a ton of red soil nickel mine produces 0.95 tons of nickel-sag, about 30 million tons per year, and its utilization is very low, only about 12%, currently applied more One of the two directions is used as concrete aggregates, one is used as concrete auxiliary gelation materials. [0003] However, due to nickel scrap, a large number of pores have been ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B40/02C04B18/16
CPCC04B18/16C04B28/02C04B40/024C04B18/144C04B22/062Y02W30/91
Inventor 李保亮刘宇翼黄昉陈亚东丁百湛刘洋陈胜
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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