Method for producing high performance structure lightweight aggregate by using copper slag

Abstract

The invention relates to a method for producing a high performance structure lightweight aggregate by using copper slag; the lightweight aggregate is prepared from the following raw materials in parts by weight: 30 to 50 parts of the copper slag, 2 to 10 parts of a stone material, 5 to 10 parts of shale, 30 to 70 parts of sandstone, and 1 to 5 parts of a mineral material. The preparation method includes the steps of selection of the raw materials, mixing of the raw materials, grinding, water addition, sintering and cooling. The method has the advantages of wide raw material sources, low price, simple preparation, and convenient implementation.

Description

Technical field [0001] The invention belongs to the technical field of building materials, and specifically relates to a method for producing high-performance structural lightweight aggregate by using copper slag. Background technique [0002] Copper slag is an insoluble inorganic non-metallic mineral residue, mainly composed of fine-grained mud and coarse-grained sand. It is a very fine-grained solid waste produced in the process of producing metallic copper from copper ore as a raw material. It is also a metallic copper production process. The largest pollution source in China, its main chemical components are iron oxide (56.8%), silicon dioxide (27.8%), aluminum oxide (3.81%), calcium oxide (3.4%), zinc oxide (3.1%) and magnesium oxide (1.5%), the main mineral is iron olivine (containing about 90% FeSiO 4 ), due to the difference in production methods and copper grades, for every ton of copper produced every ton of copper is smelted, the reverberatory furnace method will produ...

AI Technical Summary

Problems solved by technology

[0002] Copper slag is an insoluble inorganic non-metallic mineral residue, mainly composed of fine-grained mud and coarse-grained sand. It is a very fine-grained solid waste produced in the process of producing metallic copper from copper ore as raw material. The largest source of pollution in , its main chemical components are iron oxide (56.8%), silicon dioxide (27.8%), aluminum oxide (3.81%), calcium oxide (3.4%), zinc oxide (3.1%) and magnesium oxide (1.5%), the main mineral is fayalite (containing about 90% FeSiO 4 ), due to the difference in production methods and copper ore grades, for every ton of copper produced and 1 ton of copper smelted, the reverberatory furnace method will produce 10-20 tons of slag, and the blast furnace method will produce 50-100 tons of copper slag. At present, my country's copper slag The comprehensive utilization rate is very low, and the cumulative stockpiles exceed 100 million tons. With the annual increase of copper production in my country and the gradual decrease of copper ore grades, the annual production of copper slag will continue to increase. By 2015, the cumulative stockpiles of copper slag will It has reached 200 million tons, and a large amount of copper slag is piled up, which not only occupies land, wastes resources, but also easily causes environmental pollution and safety hazards. Therefore, it is imminent to develop new technologies and products for large-scale utilization of copper slag