CN201807698U

CN201807698U - System for reconditioning used sand in clay sand

Info

Publication number: CN201807698U
Application number: CN2010205714880U
Authority: CN
Inventors: 张文鹤
Original assignee: DANYANG WANLONG CASTING Co Ltd
Current assignee: DANYANG WANLONG CASTING Co Ltd
Priority date: 2010-10-22
Filing date: 2010-10-22
Publication date: 2011-04-27
Anticipated expiration: 2020-10-22

Abstract

The utility model relates to a system for reconditioning used sand in clay sand, comprising a first belt conveyor, a permanent magnet head wheel, a suspended magnetic separator, a first bucket type elevator, a hexagonal screen, a first belt type feeder, a boiling cooling bed, a second bucket type elevator, a second belt conveyor, a sand bin and a second belt type feeder, wherein the first belt conveyor is used for conveying the used sand to be treated; the permanent magnet head wheel and the suspended magnetic separator are arranged at the discharge end of the first belt conveyor; the first bucket type elevator is arranged at the discharge end of the suspended magnetic separator; the hexagonal screen is arranged at the discharge end at the top of the first bucket type elevator; the first belt type feeder is arranged below the hexagonal screen; the boiling cooling bed is arranged below the first belt type feeder; the second bucket type elevator is arranged at the discharge end of the bottom of the boiling cooling bed; the second belt type conveyor is arranged at the discharge end of the top of the second bucket type elevator; the sand bin is arranged below the second belt conveyor; and the second belt type feeder is arranged at an discharge opening of the bottom of the sand bin. The system for reconditioning the used sand in clay sand is suitable for sequentially carrying out magnetic separation, screening, sundry removal, cooling and dust removal on the used sand through the permanent magnet head wheel, the suspended magnetic separator, the hexagonal screen and the boiling cooling bed, thereby meeting the requirement for recycling and treating the used sand.

Description

Clay-bonded sand old sand treatment system

Technical field

The utility model relates to a kind of clay-bonded sand old sand treatment system.

Background technology

Current in the Foundry Production in the China and the world, the foundry goods of using sand mold production accounts for uses more than 80% of foundry goods total amount that various casting molds are produced, and the application percentage of clay-bonded sand technology in sand casting accounted for about 85%.Modeling Material occupies important status in Foundry Production, the quality of its quality directly has influence on quality (presentation quality and inherent quality), efficient and the cost of castings production, has finally had a strong impact on the quality of enterprise production and management benefit.

In the production process of using clay-bonded sand technology, molding sand is through after using repeatedly, because the cauterization effect of high temperature liquid iron, sand grains has stood thermal shock repeatedly, the clay mambrane meeting sex change on surface, crystal structure is subjected to destroying fully, becomes the dead clay that does not have the hygrometric state cohesive force, be present in the old sand with the micro mist state, become the part of old sand ash content.When the content of ashes in the old sand was too high, the slit that micro mist can stop up between the sand grains caused the gas permeability of molding sand poor.The water absorbing capacity of dead clay is stronger than active clay, can capture moisture from active clay, and therefore when dead clay content is too high, molding sand reaches to be mixed well needed amount of water and just need to increase, and causes the water content increase of molding sand.The gas permeability of molding sand is poor so on the one hand, and the water content of molding sand increases on the other hand, and the gas forming amount during cast increases, and the resistance that molten iron fills type increases, and has strengthened invasive pore, misrun, air bound and has boiled in water for a while, then dress with soy, vinegar, etc. the generation of casting flaws such as fire.Dead clay does not have the hygrometric state cohesive force, causes the tensile strength of molding sand poor, poor toughness, increases the fragility of casting mold, makes the easy crush of sand mold, drop, the sand grains casting flaw such as form sand holes, burr, burning into sand, scab that drops easily when cast.In production application, can only lean on quantitative adding fresh sand to eliminate old sand simultaneously and reduce the clay content of molding sand, though can deal with problems to a certain extent, production cost will inevitably raise, and eliminates old sand in a large number environmental protection is caused very big pressure.Therefore research is carried out Treatment for Reuse to old sand, to reduce eliminating and the adding of fresh sand of old sand, improves molding sand quality, reduce production costs, and be the technical problem that this area will solve.

The utility model content

The technical problems to be solved in the utility model provides a kind of simple in structure, clay-bonded sand old sand treatment system of being suitable for old sand is carried out Treatment for Reuse.

In order to solve the problems of the technologies described above, the utility model provides a kind of clay-bonded sand old sand treatment system, comprising: first belt feeder that is used to carry pending old sand, be located at the permanent magnetism great wheel (being permanent magnet pulley) of the first belt feeder discharge end and hang magnetic separator (promptly hanging belt-type permanentmagnet separator), be located at first bucket elevator that hangs the magnetic separator discharge end, be located at the hexagonal reel of the top discharge end of first bucket elevator, be located at first apron feeder of hexagonal reel below, the boiling of being located at first apron feeder below is cooling bed, be located at second bucket elevator of the cooling bed bottom discharge end of boiling, be located at second belt feeder of the top discharge end of second bucket elevator, be located at the sand storage and second apron feeder of being located at sand storage bottom discharge mouth of second belt feeder below.

Technique scheme of the present utility model has the following advantages compared to existing technology: clay-bonded sand old sand treatment system of the present utility model, be suitable for by hanging magnetic separator, hexagonal reel and boiling cooling bed, successively old sand is carried out magnetic separation, screening, removal of impurities and cooling and dedusting, thereby satisfy the requirement of old sand Treatment for Reuse.

Description of drawings

For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein

Fig. 1 is the structural representation of clay-bonded sand old sand treatment system of the present utility model;

Fig. 2 is the C-C cross-sectional view of Fig. 1;

Fig. 3 is the D-D cross-sectional view of Fig. 1;

Fig. 4 is the E-E cross-sectional view of Fig. 1.

The specific embodiment

See Fig. 1-4, the clay-bonded sand old sand treatment system of present embodiment comprises: first belt feeder 1 that is used to carry pending old sand, be located at the permanent magnetism great wheel 15 of first belt feeder, 1 discharge end and hang magnetic separator 2, be located at first bucket elevator 3 that hangs magnetic separator 2 discharge ends, be located at the hexagonal reel 4 of the top discharge end of first bucket elevator 3, be located at first apron feeder 5 of hexagonal reel 4 belows, be located at the boiling cooling bed 6 of first apron feeder, 5 belows, be located at second bucket elevator 7 of the cooling bed 6 bottom discharge ends of boiling, be located at second belt feeder 10 of the top discharge end of second bucket elevator 7, the old sand that is used for handling well of being located at the sand storage 8 of second belt feeder, 10 belows and being located at sand storage 8 bottom discharge mouths forwards second apron feeder 9 of mulling unit to.

Among Fig. 1,11 is that cyclone dust collectors, 12 are that electric-control system, 13 is that sack cleaner, 14 is air-introduced machine.

The magnetic separating apparatus that adopts is permanent magnetism great wheel 15 and hangs magnetic separator 2 that the purpose that magnetic separates is that the iron block magnetisable materials such as dead head, joint flash and splashings that are mingled in the old sand are removed.Magnetic separating apparatus commonly used can be divided into magnetic separation barrel, magnetic by version and separate three kinds of belt wheel and belt magnetic separators, can be divided into electromagnetism and permanent magnetism two big classes by magnetic force source difference.

Hexagonal reel 4 is used for getting rid of the foreign material of old sand and big sand group, also can get rid of part dust in the sand by dust pelletizing system simultaneously.Old sand sieves and generally carries out after magnetic separates and is broken, can sieve 1-2 time.

Seethe with excitement cooling bed 6 for cooling device, after casting-up, because the baking of high-temperature metal makes the increase in temperature of sand.As mixing the system molding sand with the higher old sand of temperature, because of moisture constantly evaporates, the moulding-sand property instability easily causes casting defect.For this reason, must force cooling to old sand.At present, generally adopt the humidification cooling means, promptly with atomizing type water is joined in the hot sand, through apparatus for supercooling, moisture is fully contacted with hot sand, the heat absorption vaporization is removed the heat in the sand by exhausting.Old sand cooling device commonly used has the double plate stirring to cool off, cooling is seethed with excitement in vibration and cool off lifting etc.; Vibration boiling cooling device production efficiency height, good cooling results.

Obviously, the foregoing description only is for the utility model example clearly is described, and is not to be qualification to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.

Claims

1. a clay-bonded sand old sand treatment system is characterized in that comprising: first belt feeder (1) that is used to carry pending old sand, be located at the permanent magnetism great wheel (15) of first belt feeder (1) discharge end and hang magnetic separator (2), be located at first bucket elevator (3) that hangs magnetic separator (2) discharge end, be located at the hexagonal reel (4) of the top discharge end of first bucket elevator (3), be located at first apron feeder (5) of hexagonal reel (4) below, be located at the boiling cooling bed (6) of first apron feeder (5) below, be located at second bucket elevator (7) of boiling cooling bed (6) bottom discharge end, be located at second belt feeder (10) of the top discharge end of second bucket elevator (7), be located at the sand storage (8) of second belt feeder (10) below and be located at second apron feeder (9) of sand storage (8) bottom discharge mouth.