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我厂有一座台车室式退火炉,有效容积为4×2×2米,每炉装载铸件12～15吨,长期以来,一直燃烧轻柴油。1979年以后,由于柴油供应紧张,被迫改烧重油(即渣油),耗量不仅比轻柴油大,而且劳动条件恶劣,操作困难。我们学习各方面经验,将喷煤粉机用在铸件退火炉上,煤粉退火炉只用两个月时间就改造成功,收到了较好的效果。 一、喷煤粉机的结构及技术规格 我们采用的喷煤粉机是青岛市胶县洋河铸造机械厂生产的,其结构如图1所示。15毫米以下煤粒加入煤斗后,由蜗轮传动的螺旋给料器均匀送入机体内,经三级叶片的离心锤头撞击,破碎成粉状(100～200目),再由高速转动(1800转/分)的喷煤叶片将煤粉由出口经管道喷入炉内。喷煤粉机的主要技术规格如下:
I plant a trolley chamber annealing furnace, the effective volume of 4 × 2 × 2 meters, each casting furnace castings 12 to 15 tons, for a long time, has been burning light diesel oil. After 1979, due to the tight supply of diesel, it was forced to burn heavy oil (that is, residual oil). The consumption was not only greater than that of light diesel oil, but also its working conditions were poor and its operation was difficult. We learn from all aspects of experience, the pulverized coal injection machine used in the annealing furnace, pulverized coal annealing furnace only two months time to reform success, received good results. First, the structure and technical specifications of pulverized coal pulverizer We used pulverized coal injection machine Yanghe Casting Machinery Factory in Qingdao City, the production of plastic, the structure shown in Figure 1. Coal particles below 15 mm added to the coal hopper, the spiral feeder driven by the worm gear evenly into the body, the three-stage centrifugal impact hammer, crushed into powder (100 ~ 200 mesh), and then by high-speed rotation 1800 rev / min) of the coal-fired leaves from the outlet of coal injection pipe into the furnace. Pulverized coal injection machine main technical specifications are as follows: