Nipple pins for UHP graphite electrodes discussion
Nipple pins for UHP graphite electrodes discussionIn order to adjust the resistivity of the nipple pin, a mixture of coal-based needle coke and graphite powder are used. Due to the different surface properties of coal-based needle coke and graphite powder, the adsorption of asphalt is different, resulting in differences in the flow and expansion properties of the nipple pin at ... ...
Testing method graphite electrode chaser
Testing method graphite electrode chaser1 Measuring method of tooth profile half-angle(1) Adjust the angle of the rudder plate of the Universal Tool-Measuring Microscope eyepiece to 0°.(2) The operation of the Universal Tool-Measuring Microscope adopts the method of gradual approximation so that the two solid lines with an included angle of 60° of the double cross auxiliary lin... ...
Detection methods of graphite electrode chaser
Detection methods of graphite electrode chaser 1 Tooth top/tooth bottom straightness errorThe straightness error of the tooth top/tooth bottom is the connection line of the corresponding points of each tooth top and each tooth bottom of the chaser. Its direction has nothing to do with the taper angle of the thread. During the detection, the chaser is placed horizontally, and th... ...
Nipple pins for UHP graphite electrodes
1 Preparation processThe preparation process is shown in Figure 3.(1) GrindingGraphite, needle coke, and hard pitch are ground separately, and the purity is controlled above 70%.(2) MixingWeigh the pitch, graphite powder, and needle coke powder into the mixer according to the formula ratio. After mixing for 5 minutes, weigh the expanding agent according to the formula and pour ... ...
The study of nipple pins for UHP graphite electrode
Since the invention of EAF steel-making method in 1899, EAF steel-making has become the main process for smelting special steel after more than 100 years of development. Graphite electrode is an irreplaceable high-temperature conductive material for electric arc furnace steelmaking because of its excellent conductivity and heat conduction properties, good toughness, strong curr... ...
Graphite electrode processing technology
The straightness error of the tooth top/tooth bottom is the connection line of the corresponding points of each tooth top and each tooth bottom of the chaser. Its direction has nothing to do with the taper angle of the thread. During the detection, the chaser is placed horizontally, and the coordinates of each point are measured and recorded. The method evaluates the magnitude ... ...
Graphite electrode Control parameters and detection methods of chaser
Aiming at the influence on the processing quality of the graphite electrode thread, this paper analyzes and researches the parameters of the chaser one by one, proposes the control items of the chaser parameters as follows, and formulates the corresponding inspection and evaluation specifications.(1) Routine testing parameters, a total of 8 parameters: ①tooth top straightness e... ...
The Knowledge About Graphite electrode processing
The Knowledge About Graphite electrode processing In the use of graphite electrodes, the connection accuracy of the thread is very important. At present, graphite electrodes are commonly connected with conical joints, and the use of triangular threads (cone at the top) connection has the advantage of large contact area. Good thread processing can ensure the surface contact betw... ...
Needle Coke The Main Raw Material of Graphite Electrode Research
Needle coke is an important raw material for the preparation of high-power graphite electrodes (HP), ultra-high-power graphite electrodes (UHP) and other carbon products. It has the obvious advantages of low sulfur, low ash content, high density, good electrical conductivity, easy graphitization and low thermal expansion coefficient. The significant advantage is that with the d... ...
