Partition wall ribbon plate prepared from pulverized fuel ash and desulfurized gypsum and preparing method of partition wall ribbon plate

Abstract

The invention relates to a partition wall ribbon plate, in particular to a partition wall ribbon plate prepared from pulverized fuel ash and desulfurized gypsum and a preparing method of the partitionwall ribbon plate. The partition wall ribbon plate is prepared from, by weight, 40-80% of the pulverized fuel ash, 5-20% of the desulfurized gypsum, 5-30% of aggregate and 5-20% of admixture, and theadmixture is prepared from, by weight, 30-35 parts of silicate, 3-5 parts of borate, 1-2 parts of sulfate, 3-5 parts of phosphate, 3-5 parts of hydroxide, 1-2 parts of haloid and 1-5 parts of lignosulfonate. Under the synergistic effect of all components of the admixture, all oxides in the pulverized fuel ash are subjected to a bonding reaction, a hardened framework like a mullite crystal structure and an ettringite crystal structure is generated, and the pulverized fuel ash treated by the admixture shows stable physical and chemical properties. The pulverized fuel ash difficult to treat is treated to obtain the partition wall ribbon plate, and the partition wall ribbon plate has the functions of being light, preserving heat and being high in strength and resistant to fire and water and the like.

Description

technical field [0001] The invention relates to a partition wall strip, in particular to a partition wall strip prepared from fly ash and desulfurized gypsum and a preparation method thereof. Background technique [0002] Fly ash is the fine ash collected from the flue gas after coal combustion. Fly ash is the main solid waste discharged from coal-fired power plants. [0003] The impact of fly ash in power plants on the environment is mainly manifested in: [0004] ① Ash storage needs to occupy a large amount of land or farmland, which wastes land resources and pollutes the soil; ② Dust pollutes the air. As long as there is a wind force above level 4, the surface ash particles can be stripped and discarded, and the ash height can reach 20-50m. Fly ash suspended in the atmosphere not only affects visibility, but also affects buildings and engineering facilities in humid environments. ③ Wet ash discharge will waste water resources and cause surface water pollution. Fly ash w...

AI Technical Summary

Problems solved by technology

[0004] ① Ash storage needs to occupy a large amount of land or farmland, which wastes land resources and pollutes the soil; ② Dust pollutes the air

As long as there is a wind force above level 4, the surface ash particles can be stripped and discarded, and the ash height can reach 20-50m. Fly ash suspended in the atmosphere not only affects visibility, but also affects buildings and engineering facilities in humid environments. ③ Wet ash discharge will waste water resources and cause surface water pollution. Fly ash will enter the water body, which will greatly increase the turbidity of the water, and the formed sediment will block the river bed and make the lake shallower. Soluble substances will deteriorate water quality

④ The fly ash stored in the ash yard floats in the atmosphere, and the fly ash falling to the ground will pollute the soil, causing soil alkalization and other impacts, affecting crops, plant growth, aquaculture, and animal husbandry production; ⑤ In the fly ash Contains heavy metal elements, toxic substances, radioactive substances and other harmful substances that pollute the environment and affect human health

[0007] There are mainly the following problems in the domestic comprehensive utilization of fly ash: (1) The comprehensive utilization rate of fly ash is low. According to relevant data reports, the comprehensive utilization rate of fly ash in my country is only about 30%, while that of foreign countries reaches 70%-80%

(2) The comprehensive utilization of fly ash is relatively narrow. The domestic comprehensive utilization of fly ash is mainly concentrated in the field of road construction and construction materials, and it is rarely used in other fields. The use of fly ash in the chemical industry and environmental protection is only in its infancy.

(3) In the process of comprehensive utilization, there are still some negative impacts on the environment, such as dust pollution from ash storage yards and transport vehicles, treatment of waste residues after extracting useful substances, accumulation of heavy metals in the process of agricultural use, and radioactive problems in building materials, etc.

(4) Policies are difficult to implement, and utilization work is unsatisfactory

[0009] The current problems of fly ash admixtures are that the admixtures at home and abroad are mainly made of inorganic materials or organic materials and inorganic materials through simple compounding, which have poor applicability and stability

Images