Calcium carbide black is primarily used as an electrolyte in dry batteries, and also in conductive, antistatic, and thermal conductive rubber products, as well as in conductive coatings and plastic products. The production process of calcium carbide black includes the preparation of acetylene gas, acetylene cracking, black carbon collection, compression and packaging, and nitrogen generation facilities.

Acetylene Carbon Black Performance Specifications:

1. Specific Gravity (ml/g): The volume of a substance per unit of mass. Unit: ml/g. Method of Experiment: Pour the item into a 50ml capacity bottle, gently shake, weigh 50ml of solid substance, and then remove to weigh its weight.

2. Iodine Adsorption Value g/kg: The iodine adsorption value determination of carbon black is a commonly used method to measure the specific surface area of carbon black. Method: Immerse a quantitative sample of carbon black in a standard iodine solution of specified concentration, mix it thoroughly, and wait until equilibrium is reached. Then, separate the carbon black from the iodine solution and titrate the concentration of the iodine solution. Calculate the ratio of the amount of iodine adsorbed to the amount of carbon black, which is the iodine adsorption value of the carbon black.

3. Hydrochloric Acid Absorption ml/g: Due to the well-developed structure, large volume, and strong liquid absorption capability of acetylene black, after adding an excess amount of hydrochloric acid to the sample and allowing it to fully absorb the acid, apply a certain pressure to squeeze out the remaining hydrochloric acid. The non-expressed portion is the amount of hydrochloric acid absorbed by the sample.

4. Resistivity Ω.cm: Resistivity is a physical quantity used to express the resistive characteristics of various materials. The resistance of a wire made of a certain material, with a length of 1 meter and a cross-sectional area of 1 square millimeter, at room temperature (20℃), is called the resistivity of that material. The unit of resistivity is Ohm-meters (Ω.cm or ohmm), with common units being Ohm-millimeters and Ohm-meters.

5. pH Value: The pH value is a measure of the ratio of the total number of hydrogen ions to the total amount of substance in a solution. It is commonly referred to as the "pH value." It represents a numerical scale indicating the acidity or alkalinity of a solution, which is the negative logarithm of the concentration of hydrogen ions.

6. Heating Loss (%): Some substances are not highly pure and are prone to absorb moisture. Upon heating, the effective components decrease, with the reduction amount referred to as the heating loss.

7. Coarse particle percentage: Take a certain amount of the sample into a beaker, add the dilute solution as a wetting agent, adjust to a paste-like consistency, then pour it into a 150μm (100 mesh) test sieve, and rinse with tap water. Dry and weigh the residue left on the sieve, which is the coarse particle fraction.