Non-fired and non-steamed tailing brick and preparation method thereof

Abstract

The invention provides a non-fired and non-steamed tailing brick and a preparation method thereof. The non-fired and non-steamed tailing brick comprises the following components in percentage by weight: 30-40% of bauxite tailings, 40-50% of iron tailings, 10-30% of cement and 0.5-3.0% of novel admixture. The preparation method comprises the following steps: uniformly mixing the raw materials, adding 11-14% of water, uniformly stirring, then enabling a mixture to enter a brick press, forming by pressing at the pressure of 20-50MPa, and naturally curing for 10-28 days to prepare the non-fired and non-steamed tailing brick. The tailing brick prepared by the preparation method provided by the invention has high unconfined compressive strength which can be up to 21MPa, and has volume density of 1681kg / m3-2099kg / m3 so as to completely meet the standard requirements of national standard 'Non-fired and non-steamed tailing brick', and the tailing bricks of MU10, MU15 and MU20 can be prepared according to different requirements. The invention provides an idea for reasonably and effectively utilizing the iron tailings and the bauxite tailings, provides reference for reasonable secondary utilization of the tailings, can obtain huge social benefits, environmental benefits and economic benefits, and provides an idea for economic transformation proposed by Chinese government at the present stage and adjustment of an industrial structure strategy.

Description

technical field [0001] The invention relates to the fields of tailings treatment and building materials, in particular to a non-burning and non-steaming tailings brick and a preparation method thereof. Background technique [0002] In my country, there is a large amount of tailings storage. The traditional method of dealing with tailings is to build a tailings dam for stockpiling, but this method has very strict requirements on the geological conditions of the on-site tailings dam at the construction site, and there is a risk of dam failure. It will bring huge hidden dangers, and will pollute and destroy the ecological environment where it is located. In short, traditional tailings disposal methods not only cause waste of resources, but also lead to environmental pollution. [0003] At the same time, in the field of building bricks, in order to protect cultivated land and clay resources, the country has banned the use of clay to make bricks. It is a good research direction...

AI Technical Summary

Problems solved by technology

[0004] Patent CN1727301A describes the use of iron tailings, fly ash and gravel to press non-burning and non-steaming bricks, the utilization rate of tailings is low, and the required solid waste components are many and difficult to realize

According to the patent CN102557533A, the use of hematite tailings to prepare non-burning and non-steaming bricks requires many types of additives, resulting in high costs, and its products can only have MU15 tailings bricks, which has low adaptability

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