Modified concrete brick containing sludge gasification dry distillation slag and preparation method thereof

Abstract

The invention belongs to the field of reuse of urban and industrial waste resources, and specifically relates to a modified concrete brick containing sludge gasification and retort slag and a preparation method thereof. 15-25% cement, 10-15% water, 0.01-0.05% accelerator, and the ratio of powder and slag in the gasification and retort slag is (1-2):3. The preparation method is: dry the gasified dry distillation slag until the water content is ≤10%, pass it through a roller crusher, control the coarse particle size to 5-15mm, and then sieve the powder through a 3mm sieve, weigh cement, gas Distillation slag, accelerator and water are mixed uniformly; the mixture is poured into a mold and then pressed into shape, and then naturally cured after demoulding. The invention obtains sludge gasification dry distillation slag by drying, granulating and gasifying urban sludge, and uses it as a raw material for preparing modified concrete bricks, which is beneficial to environmental protection and reduces the production cost of factories.

Description

technical field

[0001] The invention belongs to the field of reuse of urban and industrial waste resources, and in particular relates to a modified concrete brick containing sludge gasification and retort slag and a preparation method thereof. Background technique

[0002] With the increase of urban population and the development of industrial production, the discharge of urban wastewater and sewage is increasing, which also leads to a surge in the discharge of urban sludge. According to reports, my country's sewage discharge has reached 5.11×10 4 billion tons per year, and the amount of sludge accounts for about 0.3% to 0.5% of the treated water, and the annual discharge is huge. Sludge contains some heavy metals, pathogenic bacteria and toxic organic substances, which will cause environmental hazards such as land pollution, decay, odor, and groundwater pollution. However, municipal sludge is also rich in biological sources, organic matter and some inorganic components, w...

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