Solution for Sorting, Treatment and Resource Utilization of Antimony Slag

Antimony slag sorting treatment and resource utilization solutions

I. Background and value: mining "sleeping" treasure

Antimony smelting slag is a historical pile of waste produced in the process of pyrometallurgical smelting of antimony metal. Due to the backwardness of the early smelting technology, there is still a sizable amount of antimony metal (usually ≥1%) left in these slags. With the growth of global demand for strategic mineral resources and rising antimony prices, the recovery of antimony metal from these historical slags has become a high-quality project with high return on investment and significant economic benefits.

This antimony slag sorting treatment and resource utilization solution aims to maximize the recovery of valuable metals in antimony slag through efficient and environmentally friendly physical sorting technology, and actively explore ways to resource the tailing slag, creating a new profit growth point for the customer, and at the same time solving the environmental problems brought by the storage of historical solid waste.

Second, antimony dregs sorting and recovery of the core process: washing - gravity separation joint, efficient recovery

For the history of antimony slag composition is complex (often mixed with soil), antimony metal particle size distribution (from a few millimeters to a few centimeters) and dissociation of the characteristics of the better, we recommend the use of mature "washing - screening - jigging" core process route. The process is a fully physical method, without chemicals, environmentally friendly and with low operating costs.

1. Pre-treatment stage: ore washing and classification

• Purpose: Remove the soil and impurities mixed in antimony slag, to avoid them from wrapping antimony particles or adhering to the equipment, which will seriously affect the sorting efficiency. At the same time for the subsequent classification and sorting to prepare.

• Core equipment and process:

  • Rotary scrubber: powerfully scrub the original slag, break the mud mass, and at the same time the preliminary screening (such as into +10mm and -10mm two particle size).

  • Spiral scrubber: further scrubbing and dewatering of the fine-grained material of -10mm to enhance the cleanliness of the material.

2. Core separation stage: jigging gravity separation

• Principle: Utilizing the huge specific gravity difference between metallic antimony (specific gravity 6.68) and silicate veinstone (specific gravity about 2.5-3.0), in the aqueous medium, the antimony particles with high specific gravity sink under the action of pulsating water flow of jigger to become concentrates, and the low specific gravity waste residue will be separated as tailings.

• Core equipment and process:

  • Large Grain Jigger: treats +10mm coarse-grained material and directly recovers coarse-grained monomer antimony metal.

  • Fine-grained jigger: treating fine-grained material of -10mm, recovering fine-grained antimony metal.

• Process Advantages:

  • High efficiency: the recovery rate of antimony metal which is fully dissociated is extremely high.

  • Environmental protection: using water as medium, no chemical addition, no secondary pollution.

  • Stable: reliable operation and simple maintenance.

3. Product dewatering

• The antimony concentrate (antimony alloy) and tailings produced by jigging enter the dewatering screen (e.g. high-frequency linear vibrating screen) for dewatering respectively to get the final product and high dryness tailings.

Optional extension process: for the slag with poor dissociation degree, crushing or grinding process can be added before jigging to fully dissociate antimony and veinstone.

Third, the extension of value: tailings resource utilization

Antimony slag sorting after the tailing slag has been very low content of invaluable metals, but its main component is silicate, with the potential for resource utilization, can create additional revenue.

• Application in the field of building materials:

  • Cement mixing materials/additives: after grinding finely, it can be used as iron correction raw material or auxiliary cementitious material for cement production, and is consumed in large quantities.

  • Raw material for brick making: used in the production of no-burn bricks, paving bricks and other building materials with stable performance.

  • Roadbed/backfill material: used as foundation filler in engineering construction with low cost.

• Core Value:

  • 100% resource utilization: completely realize "zero discharge" of solid waste and solve the problem of stockpiling.

  • Value-added income generation: turning waste into treasure, opening up a second channel of income in addition to metal recycling.

  • Green and low-carbon: in line with the national circular economy and environmental policy.

Fourth, antimony slag treatment program features and advantages

1. Small investment, quick results: simple process, durable core equipment, short payback period.

2. High yield: directly from the waste slag recovery of high-value metal antimony, the economic benefits are immediately apparent.

3. Environmentally friendly: all physical process, no chemical pollution, water can be recycled.

4. Strong adaptability: according to the customer's specific slag (particle size, mud content, grade) to flexibly adjust the process and equipment configuration.

V. Service commitment

We can provide a full set of antimony slag treatment solutions and services from "slag sample testing - laboratory validation tests - process design - equipment supply - installation and commissioning - personnel training", to ensure that the project successfully landed and achieve production and efficiency.

Historical antimony smelting slag is no longer a burden on the environment, but the urgent need to develop the "city mine". This antimony slag sorting treatment and resource utilization solutions with mature, economic, environmentally friendly technology, help you to sleep on the resources into real gold and silver, to achieve a win-win situation of economic and environmental benefits. We look forward to cooperating with you to jointly develop this valuable land.