Artificial reef preparation with metallurgy slag as principal raw material

Abstract

The invention relates to a method for preparing an artificial fishing rock by using metallurgy residues as main materials, which belongs to the technical field of metallurgy residues treatment. The method is characterized by comprising the following steps: firstly, sieving and grading sea sand or river sand; secondly, mixing and grinding 0 to 20 percent of the obtained sand with the particle diameter of less than 5 millimeters with 10 to 80 percent of steel slag, 0 to 80 percent of mine refuse and 10 to 70 percent of cement clinker until the specific surface area is more than 350 square meters per kilogram; thirdly, mixing 20 to 70 percent of the mixture with 20 to 50 percent of the sieved coarse sand with the particle diameter of more than 5 millimeters and 0 to 40 percent of stones; and fourthly, obtaining the concrete artificial fishing rock with high and strong performance after high temperature maintenance. The artificial fishing rock has the advantages that the artificial fishing rock with high and strong performance is prepared by using the metallurgy residues as the main materials to remarkably reduce the preparation cost of the fishing rock, and the living environment for the aquatic lives around the fishing rock is fundamentally improved because the pH value of the concrete pore solution of the prepared fishing rock is close to that of sea water.

Description

Technical field [0001] The invention relates to the technical field of metallurgical slag treatment, and in particular provides a method for preparing artificial reefs using metallurgical slag as the main raw material to prepare artificial reefs for aquatic resource protection and underwater ecological restoration. Background technique [0002] In recent years, the decline of fishery resources has become a worldwide problem. Countries around the world have generally recognized the threat of decline of fishery resources and have increased their protection of fishery resources. Japan put forward the idea of ​​marine ranching, and academician Zeng Chengkui of the Institute of Oceanology of the Chinese Academy of Sciences also put forward proposals for marine aquatic farming and pastoralization. At present, there are various measures for the protection and proliferation of fishery resources. Among them, the construction of artificial reefs is one of the effective measures: (1) Artifi...

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Problems solved by technology

[0005] The patent with the publication number CN 1775010A describes a production method of an artificial reef. First, a three-dimensional reef skeleton is made, and a hose mold filled with flowable material is put into the reef skeleton. After the concrete solidifies, the pipe mold Pour out the contents and pull out the pipe mold to form a porous fish reef. The ratio of cement, sand and stone in the concrete is 3-5:2-4:3-4, but the mechanical properties and durability of the obtained fish reef are poor.

[0006] The patent No. ZL 200620043883.5 describes a steel-concrete artificial fish reef. The upper and middle plate frame is a steel frame product, and the lower plate is a flat square body with a reinforced concrete structure. Slips or tumbles, but is more expensive to prepare and less durable due to the rusting effect of seawater

[0007] At present, at home and abroad, waste ships and tires are mainly used as fish reefs. Due to their high cost, their utilization is limited.

Concrete materials can be used to prepare artificial reefs with various shapes, specifications, and complex structures. However, due to the strong alkalinity of ordinary cement concrete, the pH value is usually greater than 13, while the pH value of seawater is about 8.3. Ca( Oh) 2 The continuous dissolution in seawater will lead to a significant increase in the pH value of the reef surface and nearby seawater. This strong alkaline condition is harmful to the growth of common marine organisms

In the past, in the preparation of concrete artificial fish reefs, the concrete used gravel or pebbles of 5-50 mm as coarse aggregate, river sand or mountain sand of 0-5 mm as fine aggregate, and ordinary silicon cement as cementing material. Minerals with coarse crystallization and poor cohesive force, such as calcium hydroxide and ettringite, will be enriched between the coarse aggregate and the matrix, resulting in poor strength of the fish reef. Reinforced concrete needs to be prepared

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