Process for mixing materials and making external-rolled coal through sintering machine

Abstract

The invention relates to a process for mixing materials and making external-rolled coal through a sintering machine, wherein the process includes the steps of preparing materials, conducting mixing and making balls. The process is characterized in that a mixing and ball making technology combining internal matched solid fuel with externally-rolled fuel is adopted, the internal matched solid fuel which is 25wt% to 35wt% of the amount of the solid fuel added to the mixed raw material is added to the mixed raw material in a material preparing chamber fuel mine tank, mixing and ball making are conducted to make small balls which contain the internal matched solid fuel accounting for 50wt% to 60wt% of the total weight of balls and have the particle size ranging from 1mm to 3mm, the solid fuel which is 65wt% to 75wt% of the amount of the solid fuel added to the mixed raw material is used as externally-rolled fuel and added into the fuel material preparing tank, the mixture along with the made small balls are fed to a three-time feed belt machine through a constant weight feeder, then, the mixture and the small balls are sent to a coal rolling machine so that sinter of the externally-rolled fuel can be obtained, and the sinter is conveyed to a sintering chamber through a sealing-tape machine so that sintering can be conducted. The process for mixing the materials and making the external-rolled coal through the sintering machine has the advantages that the fuel is evenly distributed, the combustion condition of the fuel is improved, the sintering quality is improved, and meanwhile consumption of the solid fuel can be lowered.

Description

technical field [0001] The invention belongs to the field of pelletizing sintered ore as a raw material for ironmaking, and in particular relates to a process of rolling coal outside a sintering machine mixture. Background technique [0002] The existing sintering technology adopts the process of directly mixing fuel into the batching chamber. Since the fuel consumption is about 50kg / t-s, compared with the mixture consumption of about 1.8t / t-s, it is negligible, and it is easy to cause fuel segregation. The material melts very badly, and the air in the part where the fuel is scarce is not used, the material cannot be sintered well, the output of sintered ore decreases and the quality of sintered ore is affected. [0003] Therefore, there is a need for a sintering machine mixture rolling coal process to improve fuel combustion conditions, save solid fuel consumption, reduce toxic gas CO emissions, increase yield and output, reduce pulverization rate, and improve sinter qualit...

AI Technical Summary

Problems solved by technology

[0002] The existing sintering technology adopts the process of directly mixing fuel into the batching chamber. Since the fuel consumption is about 50kg / t-s, compared with the mixture consumption of about 1.8t / t-s, it is negligible, and it is easy to cause fuel segregation. The material melts very badly, and the air in the part where the fuel is scarce is not used, the material cannot be sintered well, the output of sintered ore decreases and the quality of sintered ore is affected

Images