Products Description
A method for producing calcium carbide belongs to the field of calcium carbide production. The traditional calcium carbide production process adopts a block raw material and arc heating method. Powdered carbon-containing raw materials and powdered calcium-containing raw materials are used, and part of the carbon-containing raw materials are burned with oxygen-containing gas to provide heat, and calcium carbide is prepared at 1700-2300°C. The carbon-containing raw material is coal or coke, and the calcium-containing raw material is calcium carbonate, calcium oxide, calcium hydroxide or calcium carbide slag. The particle size of the carbon-containing raw material and the calcium-containing raw material is below 1mm, and the mass ratio is 0.5-3:1. The oxygen-containing gas used for combustion is oxygen, oxygen-enriched air or air. This method solves the problems of high energy consumption and high pollution in calcium carbide production, and has the characteristics of wide raw material selection range, high energy utilization rate, continuous operation, large production capacity, etc. The process is also coupled with the coking process of carbon-containing raw materials and the calcination process of calcium-containing raw materials, and the raw materials are preheated to 500-1500°C by using the by-product CO of calcium carbide production and the combustion of auxiliary fuel, so as to further reduce the oxygen consumption and process energy consumption of calcium carbide production.
Products parameters
| ITEM | INDEX | |||||
| Gas Yield 20°C 101.3 Kpa L/kg ≥ |
Size | Gas Yield | Size percentage | Ash,% | ||
| Top | A Grade | Accept Grade | ||||
| 80-120mm | 300 | 295 | 280 | ≥90 | ≤1 | |
| 50-80mm | 300 | 295 | 280 | ≥90 | ≤1 | |
| 25-50mm | 300 | 295 | 280 | ≥90 | ≤1 | |
| 15-25mm | 300 | 285 | 260 | ≥90 | ≤1 | |
| 7-15mm | 290 | 270 | 250 | ≥90 | ≤1 | |
| 4-7mm | 280 | 260 | 240 | ≥90 | ≤1 | |
| 2-4mm | 260 | 240 | 220 | ≥90 | ≤1 | |
Products cooperation picture
1.The catalytic coal combustion characteristics of calcium carbide slag under different conditions were studied by thermogravimetry. It was found that carbide slag has a certain promoting effect on the ignition temperature and fixed carbon burnout rate of Jincheng coal, and the combustion-supporting effect increases with the increase of the added amount. The combustion-supporting effect of adding 0.5% carbide slag by dry mixing is very small, while the slurry mixing method has a more obvious combustion-supporting effect. Adding 0.5% carbide slag can reduce the ignition temperature of Jincheng anthracite from 582 ℃ to 576 ℃, and increase the fixed carbon burnout rate of Lu'an lean coal from 89.41% to 94.84%, while it has little effect on the ignition and burnout characteristics of Changguang high-ash bituminous coal.
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