A kind of recycling method of fine-grained tailings sand

Abstract

The invention provides a method for recycling fine-grained tailings sand. The tailings sand, clay, and limestone are used as raw materials to produce cement clinker for roads. According to the components of the raw materials, combined with the changes in the compounds produced before and after chemical reactions, an association rule is established. Based on this, accurately calculate the blending ratio of raw materials, and control the performance and quality of cement through parameter adjustment, select fine-grained tailings sand, reduce the grinding process, and have better compatibility between components. The invention makes full use of the advantages of iron tailings components, phosphogypsum retarding effect, and fly ash to enhance the later strength of cement to ensure better performance in road engineering use, and at the same time maximizes the use of solid waste tailings to promote the recovery of tailings sand Recycling and efficient utilization of resources make waste resourceful, resource efficient, and results environmentally friendly.

Description

Technical field [0001] The present invention relates to a recovery method of solid waste, in particular a recovery method of fine-grained tail mineral sand. [0002] technical background: [0003] Tailings sand is a solid waste that is discharged from the useful ingredients in the mining plant. According to statistics, the total amount of tailings in the country has more than 60 billion tons, and each year is also an amazing speed of 1.6 billion tons, current tailings. The main method is to prepare a sintered brick and steam tile, return the vacuum area, with an annual utilization rate of only 18.9%. A large number of main processing methods that have not been utilized are stacking, which not only forces enterprises to build tailings, bear high infrastructure costs, but also occupy precious land resources, causing huge challenges to the environment. [0004] Cement is the most commonly used consumables in the civil transport industry, almost every project construction is inseparab...

AI Technical Summary

Problems solved by technology

The main way to deal with a large amount of unutilized tailings is to pile them up, which not only forces enterprises to build tailings ponds and bear high infrastructure costs, but also takes up valuable land resources and poses a huge challenge to the environment

[0004] Cement is the most commonly used consumable in the civil engineering and transportation industry. Almost every project construction is inseparable from cement. Generally speaking, the raw materials for cement production generally include limestone, clay, stone powder, slag, etc. According to the composition of cement, the raw materials Cement clinker is obtained by calcination according to a certain proportion. In 2018, the national cement production volume reached 2.212 billion tons. Such a large-scale cement production consumes a huge amount of raw materials. When the amount of stone mining and land use is large, at present, it is in the most stringent Under the current environmental protection policy, the cost of sand and gravel mining and utilization is relatively high, and the damage to the environment is serious

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