Low-carbon clinker doped with scattered metal oxygen-enriched smelting slag, road cement and preparation method of low-carbon clinker

Abstract

The invention provides a scattered metal doped oxygen-enriched smelting slag low-carbon clinker. The scattered metal doped oxygen-enriched smelting slag low-carbon clinker is prepared from 75-85 parts of limestone, 3-10 parts of fine-grained copper tail mud, 2-6 parts of sandstone and 6-15 parts of scattered metal oxygen-enriched smelting slag. The invention further provides road cement using the low-carbon clinker. The road cement is prepared from 50-70 parts of the low-carbon cement clinker, 5-25 parts of scattered metal oxygen-enriched smelting slag, 5-20 parts of lithium slag, 10-30 parts of water granulated slag, 1-5 parts of an inorganic exciting agent and 0.1 part of a functional grinding aid. The invention also provides a method for preparing the road cement. The low-carbon clinker disclosed by the invention is high in strength, wear-resistant and lower in firing temperature, and the production energy consumption is reduced; the prepared low-carbon road cement is low in clinker content, high in later strength, good in wear resistance and low in shrinkage; meanwhile, resource utilization of various industrial waste residues can be achieved, and the method has the important significance of being economical, low-carbon, environmentally friendly and the like.

Description

technical field [0001] The invention relates to the field of inorganic building materials, in particular to a low-carbon road cement mixed with scattered metal oxygen-enriched smelting slag, and a preparation method thereof. Background technique [0002] The annual output of solid waste in my country's non-ferrous smelting industry exceeds 10 million tons, leaving a large amount of scattered metals. Due to the scattered sources of non-ferrous solid waste, the content of scattered metals fluctuates greatly, and the comprehensive utilization rate is low. For lead-zinc smelting slag, based on the principle of similar compatibility, with copper, nickel, etc. as the carrier, the pyrotechnic oxygen-enriched smelting process is carried out at 1150 ℃ ~ 1250 ℃ in the smelting furnace to realize the valuable recovery of selenium / tellurium in solid waste , but also produced a large amount of slag. With the structural upgrading of the smelting industry, the output of oxygen-enriched sm...

AI Technical Summary

Problems solved by technology

At present, most of the discharged lithium slag is accumulated in the open air, occupying the site and polluting the environment

Patent application number CN111187012 A, replace part of water slag with lithium slag as cement admixture to produce ordinary Portland cement, the amount of lithium slag is only 3% of cement, and the overall utilization rate is low

[0004] The inventory of copper tailings in Jiangxi Province is nearly 500 million tons, and the annual increase of copper tailings is 44 million tons, and the comprehensive utilization rate of copper tailings resources is less than 20%. Difficult to use in building materials

Fine-grained copper tailings are mainly treated in the form of reservoir dams, which occupy a large amount of storage space, not only pollute the environment, but also pose a risk of dam failure

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