Industrial Silicon Submerged Arc Furnace What Is This?

The Role & Characteristics of Industrial Silicon Ore-heating Furnace

The Role of Industrial Silicon

Industrial silicon is also called metallic silicon, and its products belong to the upstream products of photovoltaic industry (new energy) and electronic industry.

At present, the global demand for solar photovoltaic products is growing continuously. The market demand and product prices of industrial silicon products are stable and favored by the industry.

The industrial silicon smelting industry belongs to the field of high energy consumption, and the consumption of electric energy accounts for a considerable proportion of the comprehensive production cost. In recent years, with the influence of factors such as the macro policies of various countries and the increase in enterprise production capacity, the equipment of industrial silicon electric furnace ore-heating furnace has developed in the direction of large-scale, automation and environmental protection.

Industrial Silicon Submerged Arc Furnace

Industrial silicon production is a high energy consumption industry. On average, each ton of industrial silicon consumes more than 13,000 KWh of electricity. Taking China as an example, an annual production of 1 million tons of industrial silicon requires more than 1.3 billion KWh.

The consumption of one ton of silicon in advanced foreign countries is 11,000 KWh. The power consumption of industrial silicon in my country is 10-20% higher than that of advanced foreign countries, and the potential for energy saving is still great. Therefore, in recent years, customers from all over the world have been buying SAF from us with advantages in quality and price.

The silicon refining process mainly involves continuous submerged arc slag-free smelting in an industrial silicon ore-fired furnace. During the entire smelting process, carbonaceous reducing agents (lignite, metallurgical coke, etc.) and silica are mixed in a certain ratio to form the charge. The electrodes in the furnace are deeply and steadily inserted into the charge, and industrial silicon is produced through arc heating chemical reaction.

Particle Size Requirements For Carbonaceous Reducing Agents For Industrial Silicon Smelting

Energy-saving Features of Industrial Silicon Submerged Arc Furnace

From the perspective of professional furnace design and manufacturing, Sanrui Furnace, combined with customer project cases and feedback in recent years, currently considers and improves the energy saving methods in industrial silicon production as follows:

1. Large-scale furnace type;

2. Sealed SAF furnace type;

3. Waste heat utilization;

4. Measures to improve the electrical efficiency of submerged arc furnace, such as improving short-net structure design, improving transformer performance, improving electrical parameters, and using low-frequency power supply;

5. Improving the thermal efficiency of submerged arc furnaces;

6. Changing the reaction mechanism in the smelting furnace;

7. Changing the direction of raw material performance;

8. Adopting automatic control;

9. Management system construction direction.

   
   

Through years of exploration and discussion, Xi'an Sanrui has concluded that the average electrical efficiency of China's industrial silicon submerged arc furnace is above 92%.

Sanrui Furnace is also relatively mature in various technologies or measures to improve electrical efficiency, such as improving short-net structure design, using high-quality conductive materials, using low-voltage compensation technology, and improving electrical parameters.

At present, our factory's technical department has more experience and greater advantages in researching the direction of large-scale furnace type, the direction of closed furnace type, the direction of waste heat utilization, and thermal insulation design technology.

If you have any questions or needs about the electric furnace plan or project, please feel free to contact us.