BG34Y1 - Moulding material for press-moulded articles (11) 35 - Google Patents

Abstract

The products are designed for metallurgy, metal casting and industry as energy fuel for industrial boilers and household needs. They have increased physico-mechanical indicators, and the components used in the press are not toxic. The press has a weight% of metal a powder of ferrous or non-ferrous metals from 50 to 95 and a hydrocarbon binder naphtholymer resin or polystyrene powder or hydrolytic lignin or waste wood chips from 5 to 50. Another composition of the press contains, in weight, % waste coke cast or waste rock coal from 50 to 95 and binders such as sawdust or hydrolytic lignin from 5 to 50. The particle size of all starting materials and of the the binders are from 0.01 to 5.00 mm at a moisture content of 8 to 16% by weight. from the press.

Description

TECHNICAL FIELD

The utility model refers to presses for molded articles that are used in metallurgy, metal casting and in the industry as energy fuel for industrial boilers and for domestic use.

BACKGROUND OF THE INVENTION

It is known from literature sources 1, 2, 3, 4 the use of bitumen, hydrocarbon resins and waste from the pulp and paper industry as binders of presses of metallic powder or carbon containing seals.

TECHNICAL NATURE

THE USEFUL MODEL

Molded press according to the utility model comprises ferrous or non-ferrous metal waste or coke, or coal, in an amount of 50 to 95% by weight. and binders hydrocarbon petroleum resin or powdered expanded polystyrene or hydrolysis lignin or sawdust, in an amount of 5-50% by weight, with particles having a size of 0.01 to 5.00 mm and a moisture content of 8 to 16 %. The scrap metal powder is zinc or iron or aluminum or copper and the binder in this case is hydrocarbon petroleum resin or styrofoam or hydrolysis lignin. The coke or coal binder is hydrolysis lignin or sawdust.

The starting materials are mixed with the binders and homogenized for 5-10 minutes until fully blended, then pressed into the desired shape and dimensions of the press at a working pressurization pressure up to 1000 kg / cm ² at the heating temperature of the press and heated matrix from 90 to 260 ° C for 1 to 5 minutes.

Molded articles according to the utility model are derived from non-toxic waste materials that have important practical applications in metallurgy, metal casting and can be used effectively as an energy fuel for industrial and domestic use, with good physical and mechanical properties, described as follows .

a / The compressive strength of the molded articles obtained from the press of metallic powder and binders of foam polystyrene, with a particle size of 0.25 mm, a heating temperature up to 260 ° C and working pressurization up to 1000 kg / cm ² is 182 kg / cm ² , and at a particle size of 2.00 mm, a heating temperature up to 260 ° C and a working pressurization up to 1000 kg / cm ^{2, the} compressive strength is 176.

(b) The density of molded articles obtained from a metal powder press at a particle size of 0.25 mm and a binder of hydrocarbon petroleum resin powder or foamed polystyrene powder at a preheating temperature up to 260 ° C and working pressures up to 1000 kg / cm ² is 11,300 kg / m ³ , and in the case of large particles of class 2 mm, the heating temperature is up to 250 ° C and the working pressurization pressure up to 1000 kg / cm ² is 10,100 kg / m ³ .

c / The compressive strength of molded articles depends on the particle size of the press, with coke or coal press and binder of sawdust or hydrolysis lignin having a particle size of 0.15 mm compression strength of 172 kg. / cm ² , and for a particle size of 2.20 mm, the compressive strength is 161 kg / cm ² , at a matrix preheating temperature up to 250 ° C and working pressurization up to 1000 kg / cm ² .

d / The water absorption of the molded articles depends on the pressing temperature, at 200 ° C the water absorption is 4.30%, with a mixture of coal grinder 70% by weight and a binder 30% by weight. and working pressures of 950 kg / cm ² , and at a heating temperature of 230 ° C, pressures of 950 ° kg / cm ² , the particle size of the class 0.15 mm -2 mm water absorption is 3.90%.

e / The water absorption of the molded articles depends on the compression pressure and at a preheating temperature of 250 ° C with a mixture of coconut press 70% by weight. and a binder of hydrolysis lignin of 30% by weight, a particle size of 0.20 mm-2.50 mm and a pressurized working pressure

MP absorption is 4.10%, and at pressurization 100 MP, particle size of 0.20 mm-2.5 mm and a heating temperature of 250 ° C, the absorption is 3.80%.

EXAMPLE IMPLEMENTATION

THE USEFUL MODEL.

Example 1. A sample of 50 g of metallic iron powder having a particle size of 0.10 mm-2.00 mm was taken, pre-heating the metal powder to 250 ° C. To the metal powder is added 15 g of sawdust or hydrolysis lignin with a particle size of 0.10 mm-2.00 mm and a moisture content of the press of 8-16%.

The mixture of metallic powder and sawdust is mixed thoroughly until completely homogenized, then poured into a cylindrical matrix preheated to 200 ° C. The heated matrix with the press placed therein is placed on the piston of the press. It is pressed at working pressures up to 1000 kg / cm ² for 3-4 minutes. The die is released from the press and the resulting article is removed, which is briefly called a metal powder briquette and has a compressive strength of 175 kg / cm ² and a drop to 5%.

Example 2. A sample of 80 g of metallic aluminum powder with a particle size of 0.10 mm-2.50 mm was taken. The metal powder is pre-heated to 120 ° C. To the metal powder is added 20 g of a binder of hydrocarbon petroleum resin or expanded polystyrene powder having a particle size of 0.10 mm-2.00 and a moisture content of the press of 8-16%. The mixture of metallic powder and binder was stirred well until complete homogenization, after which this press was poured into a matrix having a cylindrical shape and preheated to 130 ° C.

The heated matrix with the press placed therein is placed on the piston of the hydraulic press. It is pressed at working pressures up to 1000 kg / cm ² for 3 to 4 minutes. The die is released from the press and the resulting article is removed, which is briefly called a metal powder briquette and has a compressive strength of 182 kg / cm ² and a drop of 3%.

Example 3. Work as described in Example 1 with the metal powder being zinc.

Example 4. Work as described in Example 2 with the metallic powder made of copper.

EXAMPLE 5 A sample of 50 g of coal waste with a particle size of 0.1 mm-4.00 mm and a moisture content of 8-16% was taken and 50 g of sawdust with particle size of class 0.10 mm-2.00 mm and moisture of 8-16%.

The press thus prepared is stirred well until complete homogenization, after which this mixture is heated to 200 ° C and poured into a pre-heated matrix to 250 ° C. It is pressed at working pressures up to 1000 kg / cm ² for 3 to 4 minutes. The matrix is then removed from the hydraulic press and the resulting product is released, which is briefly called a coal briquette.

Example 6. A sample of 70% by weight of coke waste was taken. with a particle size of 0.10 mm-5.00 mm and a moisture content of 8-16% and a binder of 30% by weight was added to this sample. of lignin hydrolysis, with a particle size of 0.10 mm-2.00 mm and a moisture content of 8-16%.

The press thus prepared is stirred well until complete homogenization, after which this mixture is heated to 200 ° C and poured into a matrix having a cylindrical shape and pre-heated to 250 ° C. Compressed in a hydraulic press at a working pressurization of up to 1000 kg / cm ² for 3 to 5 minutes. Then the die is released from the hydraulic press and the resulting product is removed, which is briefly called a coke briquette.

Claims

Claims (3)

1. A press for molded articles of metallic powder or carbonaceous sintering and binders, characterized in that it contains scrap metal powder of ferrous or non-ferrous metals or coke or sintering, in an amount of from 50 to 95% by weight. and binders hydrocarbon petroleum resin or powdered expanded polystyrene or hydrolysis lignin or sawdust, in an amount of from 5 to 50% by weight, with particles having a particle size of 0.01 to 5.00 mm and moisture content of 8 to 16%. Molded press according to claim 1, characterized in that the scrap metal powder is zinc or iron or aluminum or copper and the binder is hydrocarbon petroleum resin or styrofoam or hydrolysis lignin, or wood starch. Molded press according to claim 1, characterized in that the binder for coke or charcoal grinding is hydrolysis lignin or sawdust.