SU1479413A1 - Method of producing carbon articles - Google Patents

Abstract

The invention relates to the production of carbon products and can be used in the manufacture of burned or graphitized electrodes, blocks for laying electrolyzers and electric furnaces. The goal is to increase the yield of carbon products. According to the proposed method, carbon filler and coal tar pitch are mixed at a temperature above the pitch softening temperature, the resulting mass is cooled to a temperature, the lower limit of which corresponds to the softening temperature of the carbon mass measured at a specific load of 0.8-0.9 MPa, and It does not exceed the softening temperature of the mass, measured at a specific load of 0.2–0.3 MPa using the ring and rod method. The mass is loaded into a mouthpiece container heated before loading to the temperature of the carbon mass after cooling. At the same time, the mouthpiece of the press is heated to a temperature not higher than the mixing temperature of the filler and binder. After pressing, pressing and heat treatment, blanks with a density of 1.70-1.73 g / cm ₃ , bending strength of 7.2-8 MPa are obtained at a yield of 68-72%. 1 hp f-ly, 1 tab.

Description

(21) 4141719 / 23-26

(22) 08/25/86

(46) 05/15/89. Bul Number 18

(71) Dnieper Electrode Plant named after 50 years of Soviet Ukraine and Zaporozhye Machine Building Institute named after V.Ya. Chubar

(72) I.F.Sukhorukoe, V.V. Shcherbina, S.M. Zhukovin, Yu.L..Bolshakov, A.S.Korot, A.G.Sasin, N.N.Shipkov, A.N.Alshan and A.K. Sannikov

53) 661.666.1 (088.8)

(56) USSR Copyright Certificate No. 470493, cl. From 01 to 31/04, 1973.

Chalyh E.F. Technologists and equipment of electrode and electric carbon enterprises. - M .: Metallurgi, 1972, p. 114-162.

(54) METHOD OF MANUFACTURING CARBON PRODUCTS

(57) The invention relates to the production of carbon products and can be used in the manufacture of burned or graphitized electrodes, blocks for laying electrolyzers and electric furnaces. The goal is to increase the yield of carbon products. The proposed method mixes carbon filler and coal tar pitch at a temperature above the softening temperature of the pitch, the resulting mass is cooled to a temperature whose lower limit corresponds to the softening temperature of the carbon mass measured at a specific load of 0.8-0.9 MPa, and the upper limit is not higher than the softening temperature of the mass, measured at a specific load of 0.2-0.3 MPa according to the method of a ring and a rod. The cashier is loaded into a mouthpiece container heated before loading to the temperature of the carbon mass after cooling. At the same time, the press die is heated to a temperature not higher than the mixing temperature of the filler and binder. After pressing, pressing and heat treatment, blanks with a density of 1: 70-1, 73 g / cm3, bending strength of 7.2-8 MPa are obtained with a yield of 68- 72%. 1 hp f-ly, 1 tab.

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The invention relates to the production of carbon products and can be used in the manufacture of fired or graphite electrodes, blocks for laying electrolyzers and electric furnaces.

The aim of the invention is to increase the yield of carbon products.

For the manufacture of carbon products, carbon filler and coal tar pitch are mixed at a temperature above the melting temperature of the pitch, the resulting carbon mass is cooled, loaded into the container of a mouthpiece press, the mass is compressed, pressed further into billets and heat treated, the mass is cooled in the temperature range, the lower limit of which corresponds to the softening temperature of the carbon mass, measured at a specific load of 0.8-0.9 MPa, and the upper limit is not higher than the softest temperature Yeni mass measured at a specific load of 0.2-0.3 MPa. In this case, it is advisable that the press container is heated before loading to the carbon mass temperature after cooling, and the press mouthpiece is heated to a temperature not higher than the mixing temperature of the carbon filler and binder.

Example. For the implementation of the method, a mixture (1: 1) of oil cracking and shale coke, graphitized grains and coal tar pitch of grade B with softening temperature of 70 ° C (20-22%) are used. Coke taken in the form of fractions of 2-4 mm in the amount of 14%, 1-2 mm 13%, 0-1 mm 30%, 0.5 mm 28%, s graphitized grit - 0-2 mm 7%, 2-8 mm eight%.

The mass is mixed at 130 ° C, then cooled to temperatures measured at specific loads in the range from 0.2-0.3 to 0.8-0.9 MPa using the ring and rod method. The cooled mass is loaded into the container of the press, heated to 110-115 ° C. The temperature of the mouthpiece. 130-135 ° C. Pressing pressure 9-11 MPa. Before application of the final pressure, the mass is pressed.

The results of extrusion, strength characteristics, thermophysical properties of products and the yield of

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five

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five

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1 proposed and known methods are given in the table.

Claims (2)

1.Method of making carbon products, including mixing carbon filler and coal tar pitch at a temperature above the softening temperature of the pitch, cooling the resulting carbon mass, loading it into the container of the mouthpiece press, pressing the mass, pressing the billet and heat treating it, characterized in that increase the yield of products, cooling the carbon mass is carried out in the temperature range, the lower limit of which corresponds to the softening temperature of the carbon mass, measured at specific load of 0.8-0.9 MPa, and the upper limit is not higher than the softening temperature of the mass, measured at a specific load of 0.2-0.3 MPa. 2. A method according to claim 1, wherein the press container is heated to carbon temperature after cooling before loading and the press die is heated to a temperature not higher than the mixing temperature of the carbon filler and binder.