Ore furnace quality appraisal

Submerged arc furnace is a kind of metallurgical equipment, mainly used for smelting metals and minerals, especially for reducing iron ore. The working principle of the submerged arc furnace is to reduce iron ore into metallic iron through fuel and heat energy, and at the same time reduce other substances such as silicon, sulfur, phosphorus, etc. into gaseous products.
submerged arc furnace is widely used in metallurgy and mineral processing industries, especially in the steel industry. With the acceleration of the industrialization process, submerged arc furnace technology has been continuously improved and developed, and its efficiency, safety and environmental protection have been continuously improved. In the future, it is expected to develop more applications in the field of mineral processing.
Zhongke Testing and Appraisal Institute can provide submerged arc furnace quality appraisal services and make accurate appraisals in terms of product design analysis, product load analysis and product quality analysis.

submersible furnaces can be divided into static furnaces and dynamic furnaces according to the movement of materials inside.
static furnace means that the material does not move in the furnace and the smelting process is completed by heating;
dynamic furnace means that the material flows in the furnace and the reaction rate is controlled by adding air or other oxidants to complete the smelting process.

GB/T 32973-2016 Technical specifications for hot charging and hot delivery of semi-closed submersible furnace materials
JB/T 14091-2020 Technical specifications for acceptance of complete sets of waste heat recovery and utilization devices for ferrosilicon ore furnaces
YB/T 4268-2020 Technical specifications for low-voltage reactive power compensation of submersible furnaces
YB/T 4820-2020 Cold ramming paste
YB/T for integral construction of submerged arc furnaces 4666-2018 Silicon carbide carbon bricks
YB/T for submerged arc furnaces 2807-2018 Coarse joint paste

The plaintiff and the defendant signed a general contracting contract. The contract stipulated that the defendant would be the general contractor of the project. The defendant's contract scope included engineering design and necessary calibration of the submerged arc furnace (before design and acceptance). After the contract was signed, the plaintiff and the defendant began to perform the general contract contract in accordance with the agreement. However, the project has had serious quality problems since its completion. Later, due to disagreements in negotiations, the plaintiff went to court as mentioned above.
Our company was entrusted by the court to undertake the quality analysis of the "submerged arc furnace" involved in this case.
identification and analysis results: The
quality analysis expert group discussed and comprehensively technical analyzed the relevant information, on-site investigation and inspection conditions, and inspection and testing data of the "submerged arc furnace" involved in the case, and made the following quality analysis opinions:
1, on-site smoke The actual temperature of the duct exceeds the designed temperature range, and the flue design and material selection do not reach the designed temperature range, causing the flue to be unable to withstand the influence of high temperature and collapse. At the same time, it is proposed that the excessive smoke temperature is due to insufficient wind power of the fan;
2, the fan does not need to be expanded and modified, and the fan modification method cannot be used to reduce the flue temperature.