Sand ilmenite tailing-selecting treatment system and treatment process

Abstract

The invention relates to a sand ilmenite tailing-selecting treatment system and a treatment process. The system comprises two mineral benefication parts, namely a vertical-ring pulsation high-gradient magnetic separator and a staged concentration tank as well as two tailing treatment assemblies, namely a tailing slurry concentration tank and a strong belt type dehydration press. The process comprises the following steps of: magnetic separation and graded concentration of the high-gradient magnetic separator, graded reselection, tailing concentration and strong belt type dehydration extrusion. According to the mineral benefication system and the mineral benefication process disclosed by the invention, technical indexes are greatly superior to those of a conventional process, a recovery rate of iron is increased by 20% or more, a recovery rate of titanium is increased by 25% or more, and grade of iron ore concentrates and titanium iron concentrates is separately improved by 2% or more. After tailing pulp is treated by equipment, moisture content is about 20%, and an emission process is free of dust, pollution, leakage and any harmful chemical element, and reaches the relevant national environment-friendly standards; and water can be continuously recycled, so that water can be saved by 20-30% relative to a conventional process.

Description

technical field [0001] The invention relates to the technical field of mining and beneficiation, in particular to a ilmenite beneficiation and tailings treatment system and process Background technique [0002] Titanium is a silver-white metal. There are many types of titanium ore. The current industrial use is mainly rutile and ilmenite, followed by anatase, brookite, white titanium and ilmenite. At present, the traditional process commonly used at home and abroad is: ore feeding-concentration-grinding-separation-ore extraction. In sorting, gravity separation-electric separation, gravity separation-magnetic separation-flotation and single flotation process are generally adopted. [0003] Among them, when magnetic separation is selected, since the media box of the existing vertical ring pulsating high gradient magnetic separator is φ1mm, φ1.5mmm, φ2mm, φ3mm, the magnetic medium box used by most vertical ring pulsating high gradient magnetic separators is φ2mm. In order to ...

AI Technical Summary

Problems solved by technology

In order to successfully enter the magnetic separation of the magnetic separator and improve the recovery rate, a large amount of raw ore is pulped and directly enters the ball mill for grinding. The pulp is ground to -0.075mm, accounting for 60%-90%. The particle size of the pulp is relatively fine. The result of this is High energy consumption, high water consumption, and fine-grained or particulate minerals enter the ball mill at the same time, resulting in the majority of fine-grained minerals in the pulp, which are difficult to recycle, and are lost with the tail water, and it is more difficult to treat the fine-grained tailings

[0004] Moreover, the titanium content of the existing sandy ilmenite raw ore is relatively low; the beneficiation process has been seldom updated for many years, and the original extensive gravity separation process has been used. Grinding is required, which first results in a large amount of grinding and serious loss of fine powder

[0005] In the traditional process, thickeners and plate-and-frame filter presses are used for wet discharge of tailings. Because of the simple process and short construction period, it has been used until now. Among them, thickeners are used, which occupy a large area. Adding chemicals to tailings slurry requires power stirring and sedimentation Poor effect, resulting in energy consumption and cost increase

When the plate and frame filter press is running, the solvent volatilizes a lot and causes great environmental pollution; after each filtration, it needs to be cleaned and the filter cloth replaced, which is labor-intensive, time-consuming, wasteful, and relatively expensive

Therefore, the traditional process has problems such as large capital investment, difficult safety maintenance, and great damage to the geological environment; and in the process of production and operation, many people are employed, backwater cannot be fully utilized, labor costs and mechanical maintenance costs are high, resulting in increased production costs; There are also potential safety hazards in anti-seepage, flood control, and pollution prevention.

Although some ilmenite ore enterprises have also tried to adopt the dry-drainage and dry-stacking process, the effect and efficiency are not good due to engineering practice experience, immature technology, and factors such as tailings properties and different topography and geology.

Images