Pulverized Coal Lance

Pulverized Coal Lance

The PQ-type pulverized coal lance is suitable for pulverized coal injection systems and is used in combination with a ball valve. It features a simple structure and convenient operation.

A type of pulverized coal injection device, suitable for blast furnace pulverized coal injection. It consists of a lance tube, lance head jacket, porous lance head, and lance head cover. The main feature of this device is that a porous lance head with uniformly distributed round holes is installed at the head of the pulverized coal lance tube. When this device is used, the pulverized coal airflow is divided into several fine pulverized coal streams through the porous lance head. These fine pulverized coal streams quickly achieve good mixing with the blast furnace hot air, enabling the coal

Stabilizing and increasing the coal injection rate is one of the effective ways to reduce costs in blast furnace ironmaking. The use of 2520 heat-resistant steel, wear-resistant, high-temperature blast furnace pulverized coal ceramic lances not only extends the service life of the lance itself but also creates conditions for protecting the tuyere and reducing blast furnace downtime. More importantly, it plays a crucial role in stabilizing and increasing the coal injection rate, achieving high blast furnace wind temperature and oxygen enrichment, and enabling large-volume injection.

I. Process characteristics of the pulverized coal lance:

1. The lance body is made of 2520 heat-resistant steel.

2. The lance adopts advanced technology; the inner wall of the steel tube is partially lined with ceramics.

II. Usage characteristics of the pulverized coal lance:

1. Long service life and low replacement rate, reducing the labor intensity of workers.

2. Stable lance position, reducing blast furnace downtime and improving productivity.

3. Stabilizes and increases the coal injection rate, enabling large-volume injection and reducing ironmaking costs.

4. Repairable, extending the overall service life of the lance.

The PQ-2000 blast furnace pulverized coal lance is a specialized injection device used for blast furnace pulverized coal injection. It consists of components such as the lance tube, lance head jacket, porous lance head, and lance head cover, featuring a simple structure and convenient operation. Its main characteristic is that a porous lance head with uniformly distributed round holes is installed at the head of the pulverized coal lance tube, allowing the pulverized coal airflow to be divided into several fine pulverized coal streams through the porous lance head. These fine pulverized coal streams can quickly achieve good mixing with the blast furnace hot air, thereby ensuring full combustion of the pulverized coal and improving coal utilization efficiency.

During use, the lance is inserted into the furnace body from the end with the bayonet to begin operation. When the blast furnace requires coal injection, the lance can quickly and accurately inject pulverized coal to meet the production needs of the blast furnace. When the blast furnace stops coal injection, the ball in the ball valve of the lance automatically resets, ensuring that high-temperature gas inside the furnace does not leak out, thereby ensuring production safety. Although the PQ-type pulverized coal lance has high reliability and stability, abnormal damage may still occur in emergency situations. Due to the complexity of the causes, regular inspection and maintenance are required to ensure its normal operation.