Min Yue Carbon: Repairing the Damage Problem of Tank Calciner by Using Ceramic Welding Repair Technology

Henan Yueyue Carbon Co., Ltd. tank calciner production operation has been more than ten years (Note: normal service life of about 8 years) over-run the internal wall of the tank calciner at 1300 °C high temperature impact, the internal wall of the calciner gradually thinning In addition, there is a large area of ​​caverns damaged. After the material tank is damaged, the raw materials enter the fire channel and cause serious leakage and blockage. This wastes material and wastes gas. The output is not up to the standard and directly affects the production process. A single can can only produce 50% of the product. In order to solve this major problem of restricting production capacity, in late April this year, the company decided to use advanced high-temperature ceramic welding repair technology to repair the internal damage of the tank calciner successfully. The traditional repair method is to stop the furnace cold repair. Take only the 16-tank overhaul of the 2# calciner as an example. From the time of demolition to the end of the oven, it takes 10 months. The capital required is 5 million yuan, and the single can input is 300,000 yuan. There are altogether 16 fire paths in 1-6# calciners in the calcining workshop. It takes huge funds to maintain this major project. It is unrealistic and undesirable from the current economic difficult situation of the enterprise, but there are urgent problems that restrict the production capacity and quality of the process and cannot but be solved. . How to do? Company leaders repeatedly searched relevant information and learned that: The use of high-temperature ceramic repair welding technology to repair the internal damage of the tank calcining furnace is currently the best repair program in the field of thermal repair, while the use of ceramic welding repair technology, single pot investment only funds 1.2 million yuan, and the short time, effective, but also to stop production and maintenance, the impact on production capacity is small. After the company decided to contact the relevant construction unit, the mission issued a calcining workshop. On April 25, the construction unit entered the factory. After a detailed formulation of the construction plan, under the active coordination and communication between the company and the workshop, it began to repair the 1-6# calciner vessel. During the construction repair, the company’s technicians and workshop staff actively participated in it. They care about the technical personnel of the external construction unit from the life, actively cooperate with the active cooperation and cooperation from the work, and weld the processed ceramic raw material from the top of the furnace. Into the tank, so that the combustion of raw materials and additives, and then under the adjustment of the sprayer, by the oxygen carrier flow to be repaired parts, when the combustion of raw materials and oxygen in the mixture of intense oxidation reaction, this time oxygen double As a result, a large amount of heat of reaction is generated. First, as the transmission medium with the mixture sprayed into the kiln damage; Second, when the mixture is sprayed to the kiln on the surface to be repaired, oxygen as a combustion aid burning material in the mixture, the surface of the ceramic refractory particles thawed, It is adhered to the damaged part of the furnace to form a weld complement, so as to achieve the purpose of repairing the hot state of the furnace. After three months of fighting, the 1-6# calciner tank was repaired and put into use. The use of advanced ceramic welding repair technology to repair the broken tank of the calcinator compared with the traditional repair method can save the company a capital of 10,000 yuan. Henan Yueyue Carbon Co., Ltd realized from the practice of using ceramic welding repair to repair the damage of tank calciner: Advanced technology is productivity. It shortens the overhaul cycle, reduces the overhaul cost, prolongs the life of the tank, increases the company's production capacity, and more importantly, it learns a set of how to use ceramic welding repair to repair the internal damage of the tank calciner. It also laid a good foundation for the company's future technological innovation.