Kiln quality appraisal

A kiln is a thermal equipment used for firing ceramic objects, sculptures or fusing enamel to the surface of metal objects.
Kiln is usually built with refractory materials such as bricks and stones, and can be made into different specifications and sizes according to needs. It can use flammable gas, oil or electricity as the heat source. Electric kilns make it easier to control temperature than kilns that use flammable gases and oils, but potters and sculptors may feel that temperatures in electric kilns rise too quickly. The temperature inside the kiln is usually measured with a pyrometer or temperature cone, and the conditions inside the furnace can be observed through a peephole.
In the case of kiln quality appraisal, Zhongke Testing can provide kiln quality appraisal services.

Kilns are roughly divided into box type, pit type, shuttle type, mesh belt type, rotary type, kiln car type, push plate tunnel resistance furnace, vacuum furnace, gas protective furnace, ultra-high temperature tubular push plate furnace (carbon tube furnace), tungsten and molybdenum powder roasting furnace, reduction furnace and other high, medium and low temperature industrial kilns. The operating temperature is 200~2500℃.

QB/T 5640-2021 General requirements for all-electric fused glass furnaces
QB/T 2129-2019 Thermal balance, thermal efficiency measurement and calculation methods for daily ceramic industrial batch kilns
B/T 13389-2018 Technical specifications for infrared scanning temperature monitoring systems for industrial rotary kilns
JC/T 982-2005 Brick and tile baking kiln
JC 497-1991 Directly bonded magnesia-chromium bricks for building materials industrial kilns
GB/T 25328-2010 Glass kiln energy saving monitoring
GB/T 32037-2015 Industrial kiln combustion energy saving evaluation method
GB/T 39809-2021 Method for determination of energy consumption of flat glass kilns
GB/T 32283-2015 Test method for gas corrosion resistance of refractory materials used in the upper part of the kiln
GB/T 33301-2016 Calculation method for energy saving of coal-fired industrial boilers and kilns
0GB/T 23459-2009 Ceramic industrial kiln thermal balance, thermal efficiency measurement and calculation method
1GB/T 33018.2-2016 Carbon enterprise energy saving technical specifications Part 2: Baking kiln
2

quality product dispute situation:
According to the situation reported by the client and the information provided, the "coal flushing" phenomenon occurred during the use of the client's cement kiln. After inspection, there were no casualties on site. The main reasons were the explosion of the air duct and soft joints of the air inlet and outlet of the electric dust collector at the end of the kiln, the deformation of the air inlet and part of the distribution plate, the deformation of the fifth electric field plate of the air outlet electric dust collector, and the deformation of some columns of the side wall of the electric dust collector. .
In order to further clarify the cause of the accident, the client hopes to conduct a quality analysis on whether there are quality problems in the "kiln" involved that led to the accident.

quality analysis results:
The quality analysis expert group discussed the relevant information and on-site investigation and inspection of the "kiln" involved and conducted a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
After the rotor scale at the kiln head tripped due to overload, the pneumatic gate valve of the rotor scale was not closed tightly. When the rotor scale gap was adjusted on site and the scale was turned forward and reverse, a large amount of pulverized coal continued to be sprayed into the kiln (about 3.5 tons of pulverized coal), causing the system to generate excessive CO gas. The CO concentration reached more than 2.0% (gas analyzer full scale), and the electric dust collector interlock at the end of the kiln tripped.
This accident was caused by operational errors, and the non-cement kiln itself had quality problems.