wolframite beneficiation solutions

Wolframite Beneficiation Solutions

I. Program Overview

This solution is designed for wolframite (tungsten-manganese iron ore, Fe/MnWO₄), which is characterized by high density, weak magnetism, and often coexists with quartz and sulfide ores, and a set of "multi-stage crushing - classification - gravity beneficiation" is designed as the core, and supplemented by a combination of " flotation, magnetic separation, electrostatic beneficiation " process. Flotation, magnetic separation and electrostatic separation". This wolframite beneficiation scheme is especially suitable for quartz large-vein type or fine-vein type deposits, which can efficiently recover coarse and fine-grained wolframite, and comprehensively recover the associated tin, molybdenum, bismuth, sulfur and other valuable metals, so as to realize the maximization of resource utilization. The program has the core advantages of mature process, high recovery rate, economic cost and environmental friendliness.

II. Detailed Explanation of Core Process

The core of wolframite beneficiation is to utilize the density difference between wolframite and veinstone, and the process design should follow the principles of " collect as early as possible, throw away as early as possible " and stage grinding, stage sorting, in order to prevent over-crushing.

1. Crushing and pre-enrichment stage

   • Purpose: Crush the raw ore to a size range suitable for gravity separation (usually-30mm), and discard some of the waste rock in advance to reduce the amount of grinding and save energy.

   • Process: Raw ore is roughly crushed and medium crushed by jaw crusher and cone crusher. After crushing, the product can enter jigger or heavy media cyclone for pre-sorting, which can produce some coarse-grained rich blocks and discard a large number of low-grade tailings in advance.

2. Grinding and Classifying Stage

   • Purpose: To dissociate wolframite and chalcopyrite monomers, and to provide feed material with uniform particle size for subsequent gravity separation through classification.

   • Flow: The pre-enriched product enters rod mill or ball mill for stage grinding. Ground product and spiral classifier or hydrocyclone form a closed circuit to control the classification overflow size, to ensure adequate dissociation while avoiding over-grinding.

3. Gravity Roughing Stage

   • Purpose: This is the core part of recovering wolframite, utilizing jigger and shaking table to throw tail on a large scale to obtain rough concentrate (gross sand).

   • Process:

     • Jigging sorting: The graded material is fed into different types of jigger (e.g. trapezoidal jigger, downward moving jigger) according to the grain level (e.g. +2mm, 2-0.5mm). Jigger has large processing capacity, can efficiently recover medium and fine-grained wolframite, and produce high-grade heavy products (gross sand).

     • Shaking table sorting: Jigging tailings and finer-grained materials (e.g. -0.5mm) enter the shaking table for sorting. The shaking table has high sorting precision and can further recover fine-grained wolframite and produce gross sand. The middle ore of shaking table returns to regrinding and re-selection, forming a closed loop.

4. Selection and Separation Stage

   • Purpose: To purify the gross sand of gravity separation, separate qualified wolframite concentrate and comprehensively recover other valuable minerals.

   • Process:

     • Desulfurization operation: The rough concentrate usually contains sulfide minerals such as pyrite and poisonous sand. The flotation machine is used to carry out tungsten flotation and sulfur suppression to get the sulfur concentrate, and at the same time eliminate the influence of sulfur on the subsequent operations.

     • Combined Concentration: The product after desulfurization selects the combined process according to the mineral composition.

       • Table flotation (combined flotation shaking table): traditional and efficient method for separating wolframite from cassiterite and scheelite.

       • Magnetic Separation: Separate wolframite from cassiterite and scheelite (non-magnetic) by utilizing the weak magnetism of wolframite, commonly used strong magnetic separator.

       • Electrostatic separation: Used for the purification of the final concentrate, separating the residual cassiterite and other non-conductive minerals.

     • Finally get the national standard first-grade wolframite concentrate (WO₃ ≥ 65%).

5. Fine mud treatment stage

   • Purpose: Specialized in the treatment of -0.074mm fine-grained slime produced in the process of grinding and classification, recovering the fine-grained wolframite therein, which is the key to improve the total recovery rate.

   • Flow: Fine sludge is first concentrated and deslimed, followed by roughing by centrifugal concentrator, belt chute and other high-efficiency gravity separation equipment, and the enriched products are then selected and recovered by flotation (such as benzohydroxamic acid flotation) or high-gradient strong magnetic separator.

III. Configuration list of core equipment

Advantages and Features

• High recovery rate and economy: High-efficiency and low-cost gravity separation is the leading method, and the recovery rate of the whole process can reach 90%-92%, which is significantly better than the single flotation process.

• Comprehensive utilization of resources: through the joint process, not only wolframite can be recovered, but also tin, molybdenum, bismuth, sulfur and other associated valuable elements can be comprehensively recovered, which greatly improves the economic benefits of the mine.

• Specialized Recovery of Fine Mud: The targeted fine mud treatment process solves the worldwide problem of recovery of fine-grained minerals, increasing the recovery rate of the fine mud part by more than 20% and eliminating the waste of resources.

• Environmental protection and stability: the main medium of gravity separation process is water, without the need for a large number of chemicals, environmental pollution is small. The process equipment is mature and reliable, with stable operation and easy operation and maintenance.

V. Typical technical and economic indicators

Sixth, the whole cycle of technical service support

We provide a full range of turnkey engineering services from "ore" to "concentrate":

• Test research: provide detailed ore selectivity test and process test, which provide scientific basis for program design.

• Customized design: According to the test report and site conditions, we can design the process flow and equipment selection and configuration of "one mine, one strategy".

• Equipment Supply and Integration: Provide a full set of high-quality, high-performance main and auxiliary equipment manufacturing, procurement and integration.

• Construction and commissioning: guide the installation, responsible for equipment commissioning and process optimization, to ensure that the design indicators.

• Training and after-sales service: Provide comprehensive operation and maintenance training, as well as long-term technical support and spare parts supply.

This wolframite beneficiation program is the most classic, reliable and economical beneficiation route for processing wolframite. We firmly believe that through scientific tests and customized design, this wolframite solution can bring you the best return on investment and resource efficiency.