Tungsten tailings cementing material and preparation method thereof

Abstract

The invention relates to the field of building materials, in particular to a tungsten tailings cementing material and a preparation method thereof. The tungsten tailings cementing material is characterized in that a mass ratio of the cementing material is as follows: 50%-70% of tungsten tailings, 5%-15% of hemihydrate gypsum, 10%-30% of slag, 1%-8% of steel slag, 1%-5% of an activator, and 0.1%-2%of a water reducing agent, wherein a mass ratio of the activator is 40%-80% of Portland cement, and 20%-60% of sulphoaluminate cement. The preparation method of the tungsten tailings cementing material comprises the following steps: (1) performing ball-milling on the tungsten tailings and performing drying to obtain tungsten tailings powder; (2) pouring the tungsten tailings powder, the slag, thesteel slag, the activator, the water reducing agent and water into a ball mill for ball-milling to obtain a mixed material; and (3) performing curing at room temperature. The cementing material usesthe tungsten tailings as the main raw material, the problem of tungsten tailings accumulation is effectively solved, and thereby secondary resource high-value utilization of the tungsten tailings is realized.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a tungsten tailings cementitious material and a preparation method thereof. Background technique [0002] Tungsten tailings is a solid material formed after fine-grained tailings slurry dehydration is discharged after tungsten ore is ground and finely selected for its tungsten-containing minerals. It is generally composed of ore minerals and surrounding rock minerals, mainly containing fluorite, quartz, and pomegranate. Minerals such as stone, often, mica, calcite, etc., some contain a small amount of polymetallic minerals such as molybdenum, bismuth, etc., the main chemical composition is: SiO 2 、Al 2 o 3 , CaO, CaF 2 , MgO, Fe 2 o 3 Wait. Tungsten tailings have stable chemical properties and poor reactivity. High hardness, lighter color, and finer particles have greater advantages in some applications that require finer particle size; some tungsten tailings contain heav...

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Problems solved by technology

[0003] At present, tungsten tailings are mainly stored in tailings ponds or backfilled like mines, which cause waste of resources, occupy land, pollute the environment, and endanger human health.

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