SU1581691A1 - Method of thermal treatment of carbon-containing materials - Google Patents

Abstract

The invention relates to the production of carbon materials, in particular calcined, which can be used in the manufacture of electrodes and carbon-graphite structural materials. The purpose of the invention is to reduce the consumption of natural gas, increase the yield of calcined carbon material and increase its pycnometric density. The invention is a method of calcining carbon-containing materials in countercurrent rotary kilns by heating, heat treatment to remove volatile substances, calcining natural gas in the combustion products and cooling the resulting product, which is carried out with sprayed water in an amount of 65-200 kg / ton of finished product supplied directly to the material being discharged in the hot end of the furnace. Reduction in gas consumption by 22% with an asbolting value of 30-37m 3 / t, reduction of energy consumption by 8-17%

the yield of the product is 76.8-78.8%. The pycnometric density rises by 0.02-0.04 g / cm and is 2096-2120 kg / m 3. f-ly, 1 tab.

Description

The invention relates to the technology of manufacturing carbon-graphite materials, in particular the production of calcined carbon-containing materials, and can be used in the manufacture of electrodes and carbon-graphite structural materials.

The purpose of the invention is to reduce the consumption of natural gas, increase the yield of carbon-containing material and increase its pycnometric density.

Example 1. A rotary drum furnace with a length of 60 meters, a diameter of 3.5 meters and a tilt angle to the horizontal of 2 ° at a rotational speed of 1.05 rpm is continuously charged, and 17.25 t / h of uncalcined petroleum coke is loaded. . The total moisture content and volatile matter in the coke is 10.2 wt.%. The furnace is heated by burning natural gas in the amount of 457 m3 / h using a gas burner installed in the hot end of the furnace. Temperature in the zone

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the calcinations are set at 1200-1350 C at the indicated gas flow rate with a zone length of 12-16 m at a distance of 5-7 m from the hot end of the furnace.

The cooling of the material at the hot end of the furnace is carried out by spraying 133 kg / ton of water through a nozzle. At the exit from the refrigerator, 15.58 t / h of procaped product with a cyclometric density of 2120 kg / m3 is obtained.

Example 2. Similar to Example 1, but characterized in that the flow rate 9 for cooling is 65 kg / t, the gas flow is 446 me / h. The yield of the finished product is 76.78%, the pycnometric density is 2.096 g / cm3.

The table presents data on the output indicators of the process for the pH of the experiments of the invention and for the prototype.

The invention allows to reduce the gas flow rate at an absolute value of 30-37 mea / t, reduce energy consumption by 8-17%, increase the output of heat-treated carbon-containing material by 3-5%, increase by 0.02-0.04 g / cm1 non-metric density.

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25 3Q

5816914

Claims (3)

1. A method of heat treating carbon-containing materials in a countercurrent rotary kiln, including sequentially heating the starting material, heat treating to remove volatile substances, calcining natural gas in the combustion products, and cooling the calcined product, in order to reduce the gas consumption and increase the yield of the target product and increase its ionometric density, cooling the calcined product is carried out with sprayed water in the amount of 65-200 kg / ton of product fed directly to the unloaded product from the hot end of the furnace. 2. A method according to claim 1, in which it is calcined in that the calcination is carried out at 1200-1350 ° C. I 3. The method according to claim 1, about tl and h and u and with the fact that petroleum coke is used as carbon-containing material.