Coal injection device for blast furnace ironmaking

Abstract

The invention relates to a blast furnace iron-smelting auxiliary device, in particular a coal spray apparatus for the two-stage type coal spray process for blast furnace iron-smelting, wherein the apparatus comprises a coal chute, a jujube shape ball valve, a spray gun, a check valve, a ball valve, a pressing annular tube, a pressure gas air inlet pipe, wherein the jujube shape ball valve is connected with the pressure gas air inlet pipe, a through-hole is arranged in the center of the spray gun cooling water jacket, a cooling water chamber is arranged on the side wall, the top end is provided with a cooling-water intake port, the cooling water outlet, the cooling-water chamber are connected with the cooling water intake port and the cooling water outlet, the head portion of the spray gun cooling water jacket is secured on the jacket of the blast furnace. The invention can meet the requirements of the two-stage blowing coal powder process and increase coal spray amount.

Description

1. Technical field [0001] The invention relates to an auxiliary equipment for blast furnace ironmaking, in particular to a coal injection device used in a two-stage coal injection process for blast furnace ironmaking. 2. Background technology [0002] The blast furnace ironmaking two-stage pulverized coal injection process (public number CN 00858A) is based on the existing blast furnace ironmaking tuyere coal injection process, and is set in the upper part of the blast furnace reflow zone, the furnace waist or the lower part of the furnace shaft. In the second section of pulverized coal injection gun hole, the pulverized coal is sprayed into the blast furnace with inert gas or compressed air as the carrier through the pipeline, spray gun and the second injection hole. This process can increase the amount of coal injection by 30-50kg / t-P without auxiliary conditions. , is a brand-new coal injection process, but the existing coal injection equipment cannot be applied. 3. Con...

AI Technical Summary

Problems solved by technology

[0002] The blast furnace ironmaking two-stage pulverized coal injection process (public number CN 00858A) is based on the existing blast furnace ironmaking tuyere coal injection process, and is set in the upper part of the blast furnace reflow zone, the furnace waist or the lower part of the furnace shaft. In the second section of pulverized coal injection gun hole, the pulverized coal is sprayed into the blast furnace with inert gas or compressed air as the carrier through the pipeline, spray gun and the second injection hole. This process can increase the amount of coal injection by 30-50kg / t-P without auxiliary conditions. , is a brand-new coal injection process, but the existing coal injection equipment cannot be applied

Images