Method for preparing slag steam-cured brick

Abstract

The invention discloses a method for preparing a slag steam-cured brick. The method comprises the following steps of adding quick lime to acid-leaching manganese slag according to a ratio, and carrying out pretreatment on the acid-leaching manganese slag; mixing the preprocessed acid-leaching manganese slag, cement and aggregate according to a certain ratio to obtain a mixture; adding water to the final mixture according to a certain water-solid ratio; agitating to obtain a slurry mixture; putting the slurry mixture into a home-made die to primarily mold; vertically pressurizing and molding the primarily molded brick by an electric oil press pressure head from top to bottom; obtaining a high-strength brick after pressurizing for a period of time; putting the high-strength brick into a constant-temperature water bath pan to carry out steam curing after a period of time; controlling the heating speed, and keeping the constant temperature for a period of time when certain temperature is achieved; taking out the steam-cured brick and putting in a room temperature environment; and naturally maintaining for 28 days by watering normal-temperature moisture measures to obtain the baking-free slag brick.

Description

technical field [0001] The invention relates to a method for preparing bricks, in particular to a method for preparing slag steam-cured bricks. Background technique [0002] At present, most countries in the world still use fired clay bricks as the main wall material. In developing countries, clay bricks account for more than 70% of wall materials. Global pressure on energy shortages in the construction industry and growing public awareness of environmental protection has put a lot of pressure on manufacturers of construction materials. This is because governments around the world continue to introduce new policies and legislation that set limits on energy use and carbon dioxide emissions in buildings. Red brick, the traditional wall building material in my country, uses a lot of soil, and firing one million pieces will destroy one mu of land. For a country with a large population and limited arable land resources, it is of great significance to protect and save every inch ...

AI Technical Summary

Problems solved by technology

At present, relevant personnel have used industrial waste such as steel slag as raw materials to produce unburned bricks, but the product effect is not very satisfactory, and the quality problems are relatively serious. The main manifestations are: 1. The problem of freeze-thaw test is the most prominent; 2. The problem of compressive strength is serious ; 3. The problem of water absorption cannot be ignored; 4. Poor durability and easy aging; 5. In the actual production process, many enterprises have reduced the pressure in the high-pressure process, so that the strength of the unburned bricks made will be reduced. It is difficult to make the strength of the bricks reach people's goals, and the bricks produced are also easily damaged; 6. In the selection of materials, although the burn-free bricks only use industrial waste, the ratio of control and management of raw materials is unreasonable, and then The strength of bricks cannot be improved; 7. In terms of maintenance, although the maintenance under normal pressure is better than the maintenance under natural conditions, it is difficult to really improve the quality of the products produced

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