Incineration bottom ash slagsorting treatment process and equipment configuration program

The purpose of this plan is to provide a set of efficient, stable and environmentally friendly whole-line solution for the domestic waste incineration bottom ash slag resourceization project, to achieve the efficient recovery of iron, copper, aluminum, stainless steel and precious metals, and to make the tailings reach the standard of raw materials for building materials.

First, the overall process overview

The whole process follows the "first crushed and then selected, multi-stage sorting, slag and water separation, the whole process of environmental protection" principle, specifically can be divided into the following five stages:

1. Pre-processing and crushing stage: uniform feed → screening in addition to impurities → crushing dissociation

2. Core sorting stage: magnetic separation (recovery of iron) → eddy current sorting (recovery of non-ferrous metals) → gravity sorting (recovery of heavy materials and precious metals)

3. Dewatering and environmental protection treatment stage: slag and water separation → water recycling

4. Finished product processing stage: metal packaging for sale → tailing resource utilization

Second, the detailed processing flow and core equipment configuration

The following step-by-step explanation of the purpose of each link of the process and the corresponding core equipment configuration.

Step 1: Pre-treatment and uniform feeding

• Purpose of the process: Receive the incineration bottom ash from the yard, and carry out uniform and controllable feeding to remove oversized debris and provide stable guarantee for the subsequent process.

• Core equipment configuration:

  • Plate feeder: forced uniform feeding, anti-impact, wear-resistant, to ensure the stability of the subsequent equipment load.

  • Vibrating feeder: as an auxiliary or alternative solution to achieve uniform material delivery.

Step 2: Screening and crushing dissociation

• Process Purpose: Preliminary screening of raw materials and crushing of large incineration bottom ash to the target particle size, so that the metals and non-metals wrapped in it are fully dissociated.

• Core equipment configuration:

  • Tumbler Screen: It carries out preliminary screening, separates materials of different grain sizes, and has the function of breaking bags. Its anti-clogging design is crucial for processing wet sticky slag.

  • Specialized crusher forincineration bottom ash slag: with high strength design, it crushes the material to a uniform particle size usually <50mm, which is a prerequisite for achieving high recovery rate.

Step 3: Multi-stage precision sorting (core of value)
This segment is the value creation center of the entire production line, which realizes the ultimate recovery of various types of metals through the combination of multiple physical sorting methods.

• A. Ferrous metal recovery

  • Process Purpose: Highly efficient separation and recovery of all ferromagnetic materials.

  • Core equipment configuration:

    • Permanent Magnetic Separator: Arranged after the crusher, it adopts strong magnetic design to efficiently suck out iron lumps and iron chips. It can be configured with multi-channel magnetic separation to ensure the recovery rate.

• B. Non-ferrous metal recovery

  • Process Purpose: Accurately sort out copper, aluminum, zinc and other non-ferrous metals.

  • Core equipment configuration:

    • Eddy current sorter: Using the eddy current effect, the fully dissociated copper, aluminum and other non-ferrous metals are effectively separated from the residue, which is the key equipment for the recovery benefit.

• C. Heavy material and precious metal enrichment

  • Purpose of process: further recover stainless steel, zinc alloy, etc., and enrich trace gold, silver and other precious metals.

  • Core equipment configuration:

    • Jigger: utilizing gravity and water flow to separate materials with larger specific gravity (such as stainless steel and zinc), saving water and energy.

    • Shaking table: fine sorting of jig concentrates or fine-grained materials, effectively enriching copper sand and precious metals such as gold and silver, greatly enhancing the added value of the project.

Step 4: Slag-water separation and environmental protection closed loop

• Process Purpose: Separate the slag-water mixture in the sorting process, realizing the recycling of water resources and the dry pile discharge of tailings.

• Core equipment configuration:

  • Dewatering screen: preliminary dewatering of medium and fine particulate materials.

  • Filter press: deep dewatering of fine slag slurry, the output of low moisture content of dry slag cake, easy to transport and resource utilization. The filtrate is returned to the recycling pool, realizing zero sewage discharge throughout the process.

Step 5: Finished product treatment and resource utilization

• Purpose of the process: to convert the sorted products into commodities.

• Output and destination:

  • Metal products: all kinds of metals (iron, copper and aluminum, stainless steel, precious metal concentrates) are packed separately and sold as renewable resources.

  • Tailings products: clean tailings after dehydration, in line with GB/T25032-2010 building materials standards, can be used for brick making, cement blending, road base materials, etc.

Third, the advantages of the program is summarized

• High recovery rate: Multi-stage sorting process combination ensures the industry-leading recovery rate of various types of metals.

• Fast return on investment: the cost can be recovered in 10-18 months, and the metal revenue is continuous and stable.

• Closed-loop environmental protection: the whole process of physical sorting, circulating water system, no chemical additives, no secondary pollution.

• Intelligent and reliable: PLC control system, high degree of automation, easy operation, stable operation.

• Flexible customization: personalized configuration plan can be provided according to the treatment scale (200-2000 tons/day), site and budget.

Suggestions for next steps:

If you have specific project requirements, welcome to leave a message for inquiry, we will issue you a customized proposal containing the following contents:

1. Precise process flow diagram.

2. Detailed equipment configuration list and quotation.

3. Preliminary site layout plan.

Let us use data and professional, for your investment decision to provide the most solid basis.