Unlock instant, AI-driven research and patent intelligence for your innovation.

Lightweight high-strength ceramsite fired by nickel slag powder and its preparation process

A high-strength ceramsite and preparation technology, applied in the field of building materials, can solve the problems of high cost, high bulk density, low waste rate, etc., achieve significant social and economic benefits, and reduce the effect of firing temperature

Active Publication Date: 2018-05-04
FUJIAN BUILDING ENG QUALITY INSPECTION CENT
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing ceramsites mostly use single raw materials such as clay, silt, coal gangue, fly ash or shale as the main raw materials to fire ceramsites. Some of these ceramsites emphasize light weight, but their strength is extremely low, usually lower than 2.0MPa ; Some ceramsite products have extremely high strength (strength above 10MPa), but the bulk density is too high (above 1000g / cm3); some ceramsite products are mixed with chemical pure substances, and the waste rate is not high, resulting in high cost; The sintering temperature of the product is relatively high, usually above 1200°C

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lightweight high-strength ceramsite fired by nickel slag powder and its preparation process
  • Lightweight high-strength ceramsite fired by nickel slag powder and its preparation process
  • Lightweight high-strength ceramsite fired by nickel slag powder and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation technology of described lightweight high-strength ceramsite, comprises the following steps:

[0026] (1) Preparation of mixture: mix kaolin tailings, nickel slag powder and fly ash, grind and pass through a 0.16mm sieve;

[0027] (2) Add kaolin tailings, nickel slag powder and fly ash mixture with 10% to 20% of the total mass of activated carbon, mix evenly, add water to stir and form ceramsite raw meal with a predetermined size;

[0028] (3) Put the ceramsite raw material in a high-temperature furnace, set the temperature at 1000°C to 1100°C, and hold the heat for 10 to 20 minutes to complete sintering.

Embodiment 1

[0030] Mass ratio of nickel slag powder: kaolin tailings: aluminum plant sludge = 65:20:15, externally mixed with activated carbon, its quality is 10% of the total mass of nickel slag powder, kaolin tailings and aluminum plant sludge, and the firing temperature is 1050 ℃, the holding time is 15min, the compressive strength of the fired ceramsite cylinder is 8.7MPa, the water absorption rate is 1.4%, and the bulk density is 682kg / m 3 .

Embodiment 2

[0032] Mass ratio of nickel slag powder: kaolin tailings: aluminum plant sludge = 65:25:10, externally mixed with activated carbon is 10% of the total mass of nickel slag powder, kaolin tailings and aluminum plant sludge, firing temperature 1050 ° C, heat preservation After 20 minutes, the compressive strength of the fired ceramsite cylinder is 8.1MPa, the water absorption rate is 2.3%, and the bulk density is 758kg / m 3 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
cylinder compressive strengthaaaaaaaaaa
densityaaaaaaaaaa
cylinder compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a light-weight high-strength ceramsite sintered with a nickel slag powder and a preparation method thereof. The ceramsite includes, by weight, 55-65 parts of kaolin tailing, 20-30 parts of the nickel slag powder, 5-25 parts of sludge from an aluminum factory, and activated carbon. The mass of the activated carbon is 10-20% of the total mass of the kaolin tailing, the nickel slag powder and the sludge from the aluminum factory. The preparation method includes the steps of: mixing the kaolin tailing, the nickel slag powder and fly ash, grinding the mixture and sieving ground powder through a 0.16 mm sieve; adding the activated carbon accounting for 10-20% of the total mass of the kaolin tailing, the nickel slag powder and the fly ash, uniformly mixing the substances, adding water with stirring and moulding the mixture into a ceramsite raw material in preset size; and sintering the ceramsite raw material in a high-temperature furnace at 1000-1100 DEG C with temperature maintenance for 10-20 min. The preparation method can be used for prepare the light-weight high-strength ceramsite, greatly reduces sintering temperature, and utilizes wastes, saves energy and achieves environment protection.

Description

technical field [0001] The invention relates to a building material, in particular to a light-weight high-strength ceramsite fired from nickel slag powder and a preparation process thereof. Background technique [0002] Ceramsite is a kind of artificial lightweight coarse aggregate, which is usually processed at a certain temperature (generally high temperature), so that the raw materials undergo a chemical reaction to release gas, produce pores and expand, and form a light porous, spherical shape with a certain strength after cooling. or oval silicate spheres. The internal structure of ceramsite is characterized by fine and dense honeycomb micropores. Ceramsite has excellent properties, such as low density, high cylinder compressive strength, high porosity, high softening coefficient, good frost resistance, and excellent alkali-aggregate reactivity. Especially because of its low density, internal porosity, uniform shape and composition, and certain strength and firmness, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/132C04B33/138C04B38/00
CPCC04B33/132C04B38/009C04B2235/422Y02P40/60
Inventor 周敏黄金荣林美张琨健徐秀华徐国滨
Owner FUJIAN BUILDING ENG QUALITY INSPECTION CENT