Preparation method of ferronickel residue sintered water-permeable bricks

Abstract

The invention provides a preparation method of ferronickel residue sintered water-permeable bricks, and belongs to the technical field of building materials. The preparation method is characterized by adopting the following steps that firstly, ferronickel residues are smashed and sieved, and particles with the particle size of 1 mm-3 mm are taken as ferronickel residue raw materials; secondly, 70%-80% of the ferronickel residue raw materials, 10%-15% of clay and 10%-15% of a bonding agent are weighed by mass for batching, mixed and then stirred to be uniform by adding water, and a uniformly-stirred mixture is subjected to pressurization molding under the pressure of 30 MPa-50 MPa in a brick press to prepare green bricks; finally, the green bricks are dried and then sintered at the temperature of 1,050 DEG C-1,200 DEG C, heat preservation is conducted for 3-6 h, and then the ferronickel residue sintered water-permeable bricks are prepared. According to the preparation method, the industrial waste residues-ferronickel residues are maximumly utilized, the waste materials are changed into things of value, environmental pollution is reduced, and the performances of the ferronickel residue sintered water-permeable bricks meet the relevant requirements of the national standard.

Description

technical field [0001] The invention relates to a preparation method of nickel-iron slag sintered permeable bricks, belonging to the technical field of building materials. Background technique [0002] Ferronickel slag is a solid by-product produced during pyrometallurgy of ferronickel with laterite nickel ore as raw material. For every ton of ferronickel alloy produced, 4 to 6 tons of ferronickel slag are produced. Compared with metallurgical slags such as slag and steel slag, ferronickel slag has high magnesium oxide content and low calcium oxide content; therefore, it has its particularity and difficulty in the preparation of building materials, and has not been fully utilized yet. [0003] Paving sidewalks, parking lots, and city squares with permeable bricks can quickly infiltrate rainwater into the ground, which can reduce urban drainage and flood control pressure, replenish soil water and groundwater, maintain soil moisture, improve urban microclimate, and alleviate u...

AI Technical Summary

Problems solved by technology

Chinese patent CN104193300A discloses steel slag sintered permeable bricks and their production methods, which are composed of base materials and fabrics. Both base materials and fabrics are added with high-temperature binders. The high-temperature binders are composed of 6 raw materials such as feldspar and porcelain stone powder. Permeable bricks are prepared by sintering process, which uses more raw materials and complicated process

Research on the use of ferronickel slag as raw material to prepare permeable bricks has also been carried out. Among them, Chinese patent CN105418140A discloses a self-cleaning permeable brick with ferronickel slag and its preparation method, that is, using 12 kinds of ferronickel slag, raw clay and cement. Raw materials, permeable bricks were prepared by sintering, the compressive strength of the product can reach 34.8MPa, the flexural strength can reach 3.48MPa, and the water permeability coefficient is 0.48cm / s. This method also uses too many raw materials and the process is too complicated; Chinese patent CN104163596A discloses a nickel-iron slag pavement permeable brick and its preparation method, that is, the nickel-iron slag, active micropowder and cement are used to prepare the permeable brick through standard maintenance for 28 days, and the compressive strength of the product can reach 34.6MPa. The water permeability coefficient is 0.005cm / s, the production cycle of this method is long, the active micro powder needs to be ground to 300-500 mesh, and the energy consumption of grinding process is relatively high