A kind of preparation method of Portland cement of iron tailings

Abstract

The invention provides a method for preparing Portland cement with iron tailings, comprising the following steps: raw materials at least include the following components: calcium oxide, silicon oxide, iron tailings and alumina, and the mass percentage of each component is: Calcium 60-70%, silicon oxide 12-20%, iron tailings 5-20%, aluminum oxide 3-6%, weigh the raw materials according to the above mass ratio, mix them evenly and finely grind them; put the finely ground raw materials at high temperature After calcination in the furnace, it is quenched out of the kiln to obtain clinker; iron tailings are added to the clinker and mixed evenly. The mass of the added iron tailings accounts for 1-8% of the total mass of the clinker, and it is obtained after fine grinding Iron tailings portland cement. This method can effectively use iron tailings as raw materials for production, and prepare high-quality Portland cement, so as to overcome the deficiencies of the existing technology, maximize the utilization of iron tailings, and achieve the goals of saving resources, reducing production costs and protecting the environment. .

Description

technical field

[0001] The invention provides a preparation method of Portland cement, in particular relates to a preparation method of Portland cement added with iron tailings, belonging to the technical field of building materials. Background technique

[0002] The raw materials for traditional cement clinker production mainly include calcareous raw materials, clay raw materials, correction materials, mineralizers, etc. Cement clinker is mixed with gypsum and mixed materials to make cement. The vast majority of cement raw materials are non-renewable resources, and the mass production of cement will inevitably lead to resource depletion.

[0003] Iron tailings are the wastes discharged after the ore concentrator grinds iron ore and selects useful components. The stockpiling of iron tailings not only takes up a lot of land resources, but also causes serious environmental pollution. Some old tailings ponds also have potential safety hazards. Since the main chemical composit...

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