Hot melt Slag Granulation Electric Holding Furnace with Energy-saving and environmental protection

Hot melt Slag Granulation Electric Holding Furnace

Application of equipment:

  This equipment is used to receive hot melt slag from ironmaking blast furnace, through a small amount of tempering (adjusting the mass of 10-15%), adjust the current and voltage to make the temperature of the flow port is stable, and use the patented equipment copper gate to control the flow of slag port, and continuously transport to the centrifuge to prepare mineral wool.

Process description:

  The slag bag containing industrial waste slag is transported to the electric furnace workshop with a slag truck or rail car, poured into the furnace, began to raise the temperature and adjust the composition, and determined by temperature measurement and sampling to meet the production requirements of mineral wool, and transported to the centrifuge and subsequent mineral wool production line to provide raw materials for the mineral wool production line.

Structural features:

1. Less smoke emissions and obvious environmental benefits;
2. High efficiency: the melting efficiency of electric furnace is twice that of coke cupola;
3. Electric furnace flow control is stable; Ensure the stability of the stock flow from the following aspects:
① The volume design and electrode design of electric furnace are reasonable;
② Precision design of water cooling outlet control;
③ Mobile chute with free movement.
4. Low energy consumption: the main power consumption of hot slag in electric furnace: 350-400 degrees/ton of cotton, graphite electrode consumption is 2-3kg/ ton of cotton.
5. High degree of electrical automation;

Under the process diagram:

1. Core Definition & Key Functions

1.1 Definition

1.2 Key Functions

• Temperature Stabilization: Maintains molten slag at 1300-1500℃ through intelligent electric heating control, ensuring fluidity for continuous granulation.
• Efficient Granulation: Adopts advanced atomization granulation technology to produce slag particles with particle size ranging from 0.1-5mm (adjustable according to needs), with high sphericity and good particle size distribution.
• Waste Heat Recovery: Recovers waste heat from molten slag through heat exchangers, converting it into steam or hot water for production and heating, reducing energy consumption by 30-50% compared with traditional processes.
• Harmless Treatment: Completely solidifies heavy metals in slag through rapid cooling, avoiding environmental pollution caused by leaching; meanwhile, eliminates dust and harmful gas emissions during slag treatment.
• Resource Utilization: The granulated slag products can be directly used as high-grade building aggregates, cement admixtures, or raw materials for new materials, realizing the recycling of industrial solid waste.

2. Core Structure & Technical Principles

2.1 Core Components

2.2 Technical Principles

1. Feeding Stage: High-temperature molten slag from smelting equipment (such as electric arc furnace, converter) is transported to the holding furnace through a sealed chute.
2. Temperature Holding Stage: The electric heating element heats the furnace body to maintain the slag temperature at the set value (1300-1500℃), ensuring the slag remains in a fluid state without solidification.
3. Granulation Stage: The molten slag flows out through the bottom nozzle, and is atomized into fine droplets by high-pressure air or water flow; the droplets are rapidly cooled to form solid particles in the collection bin.
4. Heat Recovery Stage: The high-temperature flue gas generated during granulation and the heat from the furnace body are recovered by the heat exchanger, converting water into steam for recycling.
5. Collection & Storage: The granulated slag particles are transported to the storage bin through a conveyor belt, and can be packaged or directly sent to the downstream production line.

3. Key Technical Parameters

4. Product Features

• Energy-Saving & Environmental Protection: Recovers waste heat from molten slag, reducing fossil energy consumption; no waste water, waste gas, or solid waste emissions during operation, meeting international environmental standards (such as EU CE, ISO 14001).
• High Resource Utilization Rate: The granulated slag products have high activity and good mechanical properties, which can replace natural sand and gravel, realizing "waste into treasure" and reducing resource waste.
• Stable & Reliable Operation: The electric heating system has stable heat output, and the refractory material has high temperature resistance and corrosion resistance; the automatic control system realizes real-time monitoring and fault early warning, ensuring continuous operation for 24 hours.
• Strong Adaptability: Suitable for various molten slags (such as steelmaking slag, non-ferrous metal smelting slag, industrial solid waste incineration slag) with different compositions and viscosities; can be customized according to the user's slag composition and treatment capacity.
• Low Operation Cost: The electric heating system has high thermal efficiency, and the maintenance cost of components is low; the granulation process is simple, reducing labor input.

5. Application Scenarios

• Metallurgical Industry: Steelmaking slag, ironmaking slag, and non-ferrous metal (copper, aluminum, nickel) smelting slag treatment; recovery of waste heat and production of building aggregates.
• Industrial Solid Waste Treatment: Treatment of incineration slag from municipal solid waste, hazardous waste, and industrial waste; harmless treatment and resource utilization of slag.
• Building Materials Industry: Production of high-grade concrete aggregates, cement admixtures, and lightweight building materials from granulated slag.
• New Energy & Environmental Protection Projects: Supporting equipment for waste-to-energy plants, industrial waste heat recovery projects, and circular economy industrial parks.

6. Competitive Advantages

• Advanced Technology: Integrates electric heating holding, efficient granulation, and waste heat recovery technologies, leading the industry in technical maturity.
• Customized Solutions: Provides tailor-made equipment design and process optimization according to the user's slag characteristics, treatment capacity, and product requirements.
• International Certification: The product has passed CE, ISO 9001, and other international certifications, complying with the technical and environmental standards of global markets (such as Europe, Southeast Asia, Africa).
• Comprehensive After-Sales Service: Provides one-stop services including equipment installation, commissioning, operation training, and maintenance; overseas service centers ensure timely technical support.