Non-ferrous smelting sewage treatment neutralization slag concrete brick and preparation method thereof

Abstract

The invention discloses a non-ferrous smelting sewage treatment neutralization slag concrete brick and a preparation method thereof. The concrete brick comprises the following raw materials in percentage by mass: 25 to 35% of neutralization slag, 3 to 6% of cement, 8 to 12% of mineral slag, 35 to 45% of furnace slag, 0 to 15% of fly ash, and 1 to 2% of admixture. The invention also discloses a preparation method of the non-ferrous smelting sewage treatment neutralization slag concrete brick. The prepared neutralization slag concrete brick has excellent performance, the leaching toxicity meetsthe environmental protection requirement, and many problems such as environmental pollution, waste of land resources and high disposal cost caused by the non-ferrous smelting sewage treatment neutralization slag are solved, and the non-ferrous smelting sewage treatment neutralization slag is used as a resource and is harmless, and other raw materials are conventional industrial solid waste which are cheap and easy to obtain, therefore, waste is used to treat waste, the cost of non-ferrous smelting wastewater treatment neutralization slag is greatly reduced, and a broad market prospect is provided.

Description

Technical field [0001] The invention relates to the technical field of new environmental protection building materials, in particular to a neutralized slag concrete brick for non-ferrous smelting sewage treatment and a preparation method thereof. Background technique [0002] my country is a major producer of non-ferrous metals. According to statistics, the amount of non-ferrous smelting waste in my country has reached 7438×10 4 t, covering an area of ​​865×10 4 m 2 , And the annual emissions are about 920×10 4 The speed of t increases year by year. The treatment of nonferrous smelting slag in my country is mainly open-air storage. The comprehensive utilization rate is low, with an average utilization rate of about 45%. The increase in stockpiles increases environmental sanitation pollution and safety risks. Lead and zinc contained in smelting slag , Copper, chromium, cadmium, arsenic, mercury and other heavy metal elements that flow into nearby rivers with water or infiltrate int...

AI Technical Summary

Problems solved by technology

With the development of the hydrometallurgy process, the discharge of neutralized slag is increasing year by year, and it is mainly stockpiled or landfilled. In the process of stockpiling or landfilling, it not only has the disadvantages of occupying too much land and high costs, There is also an environmental risk of neutralization slag accumulation. First, the "running, leaking, dripping, and leakage" during the transportation process will have a negative impact on the environment along the way; water body poses a potential threat

At present, in China, the neutralization slag is generally processed by washing→drying→grinding→calcination, which consumes a lot of energy and is likely to cause secondary pollution. The products produced have narrow adaptability, poor water resistance, low strength, and no economic value. , cannot be recognized by the market

Therefore, a concrete brick based on conventional industrial solid waste such as neutralization slag in the treatment of non-ferrous smelting sewage is developed to solve many problems such as environmental pollution, waste of land resources, and high disposal costs caused by neutralization slag in the treatment of non-ferrous smelting sewage. Making it resourceful and harmless has become an urgent problem to be solved

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