Compound pulverized fuel ash activator and application

Abstract

The invention relates to an activator, in particular to a compound pulverized fuel ash activator and application. The compound pulverized fuel ash activator is used for activating pulverized fuel ash,and 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. Sulfate is prepared from dicalcium silicate, tricalcium silicate and a C component, and the C component is prepared from at least one of sodium silicate, sodium metasilicate or potassium metasilicate. By means of the compound pulverized fuel ash activator and the application, the pulverized fuel ash is directly or indirectly subjected to chemical modification of the surface of the pulverized fuel ash and modification of substances among particles of the pulverized fuel ash, generation of gel substances and the generation of all structure crystals are promoted, and treated pulverized fuel ash shows stable physical and chemical performance. The invention further provides the application of the compound pulverized fuel ash activator in preparing partition slats, the prepared partition slats have stable quality, have the fireproof level of A1, and have the advantages of having low weight, heat insulation, high strength, fire resistance, water resistance and the like.

Description

technical field [0001] The invention relates to an activator, in particular to a composite fly ash activator and its application. 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 will enter the water body, which will greatly increase the turb...

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

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