CN1049616C

CN1049616C - Binder for casting core and synthesis technology

Info

Publication number: CN1049616C
Application number: CN94110607A
Authority: CN
Inventors: 王清泉
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-23
Filing date: 1994-05-23
Publication date: 2000-02-23
Anticipated expiration: 2014-05-23
Also published as: CN1113838A

Abstract

The present invention relates to a bonding agent for casting a core. Thick crude oil with high sulfur and colloid is used as the main raw material in the present invention. The raw material has the composition of 60 to 90% of thick crude oil with high sulfur and colloid, 0 to 30% of plant oil foot, 0 to 10% of rosin, 5 to 10% of ferrous sulfate (96%), 4 to 20% of ammonia water (25%), 0-10% of iron naphthenate (2%), 0 to 15% of diluting agent and 0.3 to 0.5% of demulsifying agent. The synthesis technology comprises the following steps that 1 the thick crude oil with high sulfur and colloid is processed; 2 a drier solution is prepared; 3 the thick crude oil with high sulfur and colloid is mixed and stirred with the drier solution, and subsequently, a mixture of the crude oil and the drier solution is filtered after lowering the temperature to remove slag. The present invention solves the problems that the synthetic fat bonding agent has insufficient raw material sources, low strength and easy degeneration. Furthermore, the present invention has low price, and simultaneously, the present invention has low temperature and energy saving in the process of casting the core. Additionally, the present invention has no creep deformation and less smog in the process of baking, and the fabricated forming core has less gas yield and good collapsibility.

Description

Adhesive for casting core and synthesis technique

The present invention relates to a kind of organic synthesis binding agent, particularly a kind of adhesive for casting core and synthesis technique.

The binding agent that tradition is made core mainly contains tung oil, linseed oil, rice bran wet goods, and these vegetable oil cost an arm and a leg, and are difficult in industrial a large amount of consumption.Novel binding agent mainly contains resinoid bond, closes the fatty oil binding agent, with regard to resinoid bond, China near or reach the level of each advanced country of the world, but this binding agent price is very expensive.The raw material that closes the fatty oil binding agent mainly is about 80% vegetable oil residue, about 20% residual oil, though its price is low, raw material sources shortage, intensity are low, perishable.Add the more allergic reaction that causes skin of diluent.In I, II level core, close the fatty oil binding agent and still can not substitute tung oil, flax wet goods vegetable oil binding agent.

The objective of the invention is to provides a kind of adhesive for casting core and synthesis technique at above-mentioned problems of the prior art.This binding agent raw material sources are wide, price is low, intensity is high, never degenerate.Be used for low, the energy savings of casting core baking temperature, not creep in the baking, smog are few, and the core gas forming amount that makes is little, collapsibility good.

The objective of the invention is to be achieved through the following technical solutions: the synthetic binder that this adhesive for casting core is is primary raw material with the high colloid consistency crude oil of high-sulfur, the high colloid consistency crude oil of high-sulfur is meant the crude oil of asphaltenes 8.1%, silica gel gum 28.4%, moisture 2.2%, salt content 120mg-Nacl/l, ash content 0.014%, C85.12%, H11.61%, N0.37%, S1.81%.Percentage is during this adhesive for casting core prescription heavy: the high colloid consistency crude oil of high-sulfur 60-90%, vegetable oil residue 0-30%, ferrous sulfate (96%) 5-10%, ammoniacal liquor (25%) 4-20%, rosin 0-10%, iron naphthenate (20%) 0-10%, demulsifier 0.3-0.5%.

The technical process of synthetic adhesive for casting core 40 times:

1, the processing of the high colloid consistency crude oil of high-sulfur pumps into the high colloid consistency crude oil of high-sulfur in the uncovered stirred autoclave, adds demulsifier, is heated to 150 ℃-180 ℃, and dehydration, filtration get final product;

2, the preparation of drier solution, add ferrous sulfate, ammoniacal liquor, water in stirred tank, at room temperature stirred 20 minutes, heating up to stir adds vegetable oil residue down, 80 ℃-100 ℃ of temperature controls, speed of agitator 70 minutes/minute, be reacted to clearly thin transparent till, bleed off the bottom water layer after leaving standstill, add the hot water washing more than 80 ℃, to PH be 6-7, heat to 130 ℃, dewater till the no suspended substance;

3, the high colloid consistency crude oil of the high-sulfur that will handle with make drier solution and mix mutually, stirred 30 minutes, cool to 80 ℃, filter waste.

The present invention compared with prior art has following advantage:

1, cost is low.The used binding agent synthesis material of the present invention mainly is the high colloid consistency crude oil of high-sulfur that lands, and the oil yield of this viscous crude is low, is unsuitable for oil refining.Sufficient raw, cheap.

2, the synthetic fat binder of using in the present invention and the casting core production at present compares, and the baked tensile strength height is not perishable.

3, the present invention is used for low, the energy savings of casting core baking temperature.

4, core not creep when toasting, the smog of the mixed system of binding agent of the present invention are few.

5, the core gas forming amount of the mixed system of binding agent of the present invention is little, collapsibility good.

6, in the present invention preparation diluent consumption few or need not, can prevent cutaneous anaphylaxis.

Embodiments of the invention are described in detail in detail below:

This adhesive for casting core is be primary raw material with the high colloid consistency crude oil of high-sulfur synthetic binder, the high colloid consistency crude oil 28.4% of high-sulfur, a moisture 2.2%, salt content 120mg-Nacl/l, ash content 0.014%, C85.12%, H11.6%, N0.37%, the crude oil of S1.81%.The formulation weight percentage of this adhesive for casting core is: the high colloid consistency crude oil of high-sulfur: 60-90%;

Vegetable oil residue: 0-30%;

Ferrous sulfate (96%): 5-10%;

Ammoniacal liquor (25%): 4-20%;

Rosin: 0-10%;

Iron naphthenate (2%): 0-10%;

Demulsifier 0.3-0.5%.

Vegetable oil residue in the said components can be preparation of soya-oil dregs or cotton oil pin, preparation of soya-oil dregs can be preparation of soya-oil dregs or cotton oil pin, preparation of soya-oil dregs, cotton oil pin are meant soybean, cottonseed respectively by hot moulding, and methods such as cold press or extraction are taken out the part of being left after soya-bean oil, the cotton oil.

The synthesis technique of this adhesive for casting core is:

1, the processing of the high colloid consistency crude oil of high-sulfur.The high colloid consistency crude oil of high-sulfur is pumped in the uncovered stirred autoclave, add demulsifier, be heated to 150 ℃-180 ℃, dehydration, filtration get final product.

2, the preparation of drier solution.In stirred tank, add ferrous sulfate (96%), ammoniacal liquor (25%), water, stirred 20 minutes under the room temperature.Heat up to stir and to add vegetable oil residue down, temperature control 80-100 ℃, 70 rev/mins of speeds of agitator, be reacted to transparent till, bleed off the bottom water layer after leaving standstill, adding hot water more than 80 ℃, to be washed to PH be 6-7, heats to 130 ℃, dewaters till the no suspended substance.

3, the high colloid consistency crude oil of the high-sulfur that will handle mixes mutually with the drier solution that makes, and stirs 30 minutes, cools to 80 ℃, filters waste.

In above-mentioned synthesis technique, during practical operation, ferrous sulfate should add water earlier and be made into 15% solution usefulness again, and general ferrous sulfate excess about 5% could guarantee that displacement fully.Vegetable oil residue is generally also wanted excess 10-25%, just easily forms the acid complex compound of fine solubility and stability.When preparation drier solution, also available caustic soda replaces ammoniacal liquor.Mix mutually with the drier solution that makes at the high colloid consistency crude oil of the high-sulfur that will handle, stirred 30 minutes, cool to 80 ℃, behind the filtration waste, can add the intensity that rosin is adjusted binding agent, add the drying time that iron naphthenate is adjusted binding agent.

The optimum formula of this adhesive for casting core is:

The high colloid consistency crude oil of high-sulfur: 65%

Drier solution: 24%

Rosin: 8%

Iron naphthenate (2%) 3%

Claims

1, a kind of adhesive for casting core, it is characterized in that it being the synthetic binder that is primary raw material with the high colloid consistency crude oil of high-sulfur, the high colloid consistency crude oil of high-sulfur is meant asphalitine 8.1%, silica gel gum 28.4%, moisture 2.2%, the crude oil of salt content 120mg-Nacl/l, ash content 0.014%, C85.12%, H11.61%, N0.37%, S1.81%.

2, adhesive for casting core according to claim 1 is characterized in that its formulation weight percentage is: the high colloid consistency crude oil of high-sulfur 60-90%

Vegetable oil residue 0-30% ferrous sulfate (96%) 5-10%

Ammoniacal liquor (25%) 4-20% rosin 0-10%

Iron naphthenate (2%) 0-10% demulsifier 0.3-0.5%

3, adhesive for casting core according to claim 2, it is characterized in that vegetable oil residue can be preparation of soya-oil dregs or cotton oil pin, preparation of soya-oil dregs, cotton oil pin are meant that respectively soybean, cottonseed take out the part of being left after soya-bean oil, the cotton oil by methods such as hot moulding, cold press or extractions.

4, a kind of synthesis technique of adhesive for casting core is characterized in that:

(1) processing of the high colloid consistency crude oil of high-sulfur pumps into the high colloid consistency crude oil of high-sulfur in the uncovered stirred autoclave, adds demulsifier, is heated to 150 ℃-180 ℃, and dewatering and filtering gets final product;

(2) preparation of drier solution, add ferrous sulfate, ammoniacal liquor, water in stirred tank, at room temperature stirred 20 minutes, heating up to stir adds vegetable oil residue down, temperature control 80-100 ℃, 70 rev/mins of speeds of agitator, be reacted to transparent till, bleed off the bottom water layer after leaving standstill, place the hot water washing more than 80 ℃, to PH be 6-7, heat to 130 ℃, dewater till the no suspended substance;

(3) the high colloid consistency crude oil of the high-sulfur that will handle mixes mutually with the drier solution that makes, and stirs 30 minutes, cools to 80 ℃, filters waste.

5, the synthesis technique of adhesive for casting core according to claim 4 is characterized in that adding the intensity that rosin is adjusted binding agent.

6, the synthesis technique of core-making by casting stick according to claim 4, it will be levied and be to add iron naphthenate to adjust the drying time of binding agent.