Micro carbon chromium iron furnace for ferroalloy are furnace

The structural form of the equipment is an arc-shaped tilting frame type, with hydraulic tilting method for steel tapping. When the furnace body is tilted back to the horizontal position, there are two horizontal supports behind the arc-shaped frame to ensure that the furnace body can always remain horizontal in case of hydraulic system failure, and no tipping accidents will occur.
The 2-electrode lifting hydraulic proportional valve speed automatic regulator adopts a control system composed of Siemens programmable controllers, which is easy to operate and reliable.
The 3-electrode lifting mechanism adopts a hydraulic cylinder transmission form, which is flexible, safe and reliable in transmission.
The tilting of the furnace body adopts hydraulic transmission form and integrates block type hydraulic valves. The hydraulic station is equipped with two plunger pumps, one in use and one as backup, and is also equipped with an energy storage tank with pressure holding function.
Five large cross-section water-cooled cables, conductive cross arms, flexible compensators, copper bars, and energy-saving short nets arranged in a triangular space. Short network impedance value ≤ 0.5+j 2.3m Ω, three-phase impedance imbalance ≤ 5%.
The 6 conductive cross arms are electrode arms made of a new type of copper steel composite plate, with good high temperature resistance. The electrode clamp is made of chrome copper forging, and the electrode clamping is clamped with stainless steel holding tape. The clamping force is high, easy to adjust, reliable in operation, and not prone to arcing, with a long service life.
The high voltage side meter (active and reactive electricity) for the electricity consumption of the 7 electric furnace smelting, as well as the primary overcurrent relay and secondary overcurrent relay, are separately led to the low voltage operation room for convenient measurement and monitoring. Install one set of secondary voltage indicator lights and voltage meters inside and outside the control room for easy on-site monitoring.
The cooling water system has pressure and water temperature monitoring, as well as an alarm. All welding seams connected to cooling water should avoid direct exposure to arc light. Low inlet and high outlet design for cooling water.
10. Adopting a semi closed smoke hood with a smoke exhaust outlet, connected to a dust removal system, the dust removal effect is good. The discharge port is equipped with a valve to control the amount of material added.

Working principle
Micro carbon chromium iron furnaces generally adopt the form of submerged arc furnaces. Its working principle is to use electrodes inserted into the furnace material, and heat the furnace material through the arc discharge generated between the electrodes and the furnace material, as well as the resistance heat generated when the current passes through the furnace material. Under high temperature, a series of complex physical and chemical reactions occur between chromium ore, reducing agents (such as ferrosilicon, aluminum, etc.), and fluxes in the furnace charge. The chromium oxide in chromium ore is reduced to metallic chromium by a reducing agent, and due to the use of specific processes and slag composition control, the carbon content in the final product is controlled at an extremely low level, thereby producing micro carbon ferrochrome.

Technical Parameter
Electric furnace power: The power of a micro carbon chromium iron furnace depends on the production scale and product requirements, generally ranging from several thousand kilowatts to tens of thousands of kilowatts. A larger electric furnace power can provide higher temperature and energy, which is beneficial for improving production efficiency and product quality, but it also requires corresponding power supply systems and equipment matching.
Working temperature: The working temperature inside the furnace is usually around 1600-1800 ℃. High temperature is one of the key factors to ensure the full reduction of chromium ore and effective control of carbon content. However, excessively high temperature will increase energy consumption and equipment heat load, so it is necessary to control it reasonably according to specific process requirements and furnace material characteristics.
Electrode current density: Electrode current density is one of the important parameters for measuring the operating status of micro carbon chromium iron furnace, generally controlled within the range of several amperes per square centimeter to tens of amperes. An appropriate current density can ensure the normal operation of the electrode and the heating effect inside the furnace, while avoiding problems such as electrode overheating and rapid consumption. The magnitude of current density is related to factors such as electric furnace power, electrode diameter, and charge resistance, and needs to be adjusted and optimized according to actual production conditions.

Advantages and Applications:
Advantages: Compared with other chromium iron production methods, micro carbon chromium iron furnaces have the advantages of high production efficiency, stable product quality, strong adaptability to raw materials, relatively low energy consumption, and low environmental pollution. It can precisely control the temperature, atmosphere, and reaction time inside the furnace, thereby achieving precise control of product composition and performance, and producing high-quality micro carbon ferrochrome products. In addition, the micro carbon chromium iron furnace also has the characteristics of high automation, easy operation, and easy maintenance, which is conducive to improving production efficiency and reducing labor intensity.
Application: Micro carbon ferrochrome is mainly used in the production of alloy steels such as stainless steel, heat-resistant steel, and acid resistant steel. Micro carbon ferrochrome is an indispensable alloy additive in stainless steel production, which can improve the corrosion resistance, strength, and heat resistance of stainless steel. Therefore, micro carbon chromium iron furnaces play an important role in the steel metallurgy industry, and the micro carbon chromium iron products they produce are widely used in fields such as construction, machinery manufacturing, automotive industry, aerospace, etc.