CN107598072A

CN107598072A - A kind of sand formulation

Info

Publication number: CN107598072A
Application number: CN201710913107.9A
Authority: CN
Inventors: 施路明
Original assignee: Minjiang Jiangsu Mining Co Ltd
Current assignee: Minjiang Jiangsu Mining Co Ltd
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2018-01-19

Abstract

The present invention relates to one kind, it is characterised in that：It is made up of in parts by weight following component：15 ~ 25 parts of clay-bonded sand, 15 ~ 25 parts of quartz sand, white 20 ~ 25 parts of sand, 20 ~ 25 parts of magnesia, 8 ~ 15 parts of diatomite, 5 ~ 8 parts of pitchstone, 3 ~ 6 parts of rosin, 2 ~ 5 parts of titanium dioxide, 5 ~ 10 parts of coal dust, 25 ~ 35 parts of binding agent, 10 ~ 15 parts of curing agent, 5 ~ 10 parts of brown alundum powder, 10 ~ 13 parts of water；Protruded compared with prior art using clay-bonded sand as raw material, adhesive property, not only making is simple, cost is cheap but also suitable for the secondary use after sand formulation recovery, greatly reduces use cost by the present invention.The coefficient of expansion is smaller when white sand and magnesia are heated, mixes the roughing sand as casting sand formula using white sand and magnesia with quartz sand, reduces the coefficient of expansion of quartz sand so that casting condensation rate is uniform, and cast(ing) surface is not likely to produce crackle and shrinkage cavity after condensation；The viscosity enhancing of casting sand formula can be caused by adding coal dust and clay.

Description

A kind of sand formulation

Technical field

The present invention relates to ore in sand form field, more particularly to a kind of sand formulation.

Background technology

Molding sand is the material for being used for moulding in sand casting, and effect of the molding sand in Foundry Production is particularly important, because of type The poor quality of sand and caused by casting wasted product account for the 30~50% of the total waste product of casting.The cementitiousness of molding sand is to weigh Waterglass is made as binding agent in one important indicator of sand formulation quality, existing molding sand generally use waterglass Sand, although bond effect is relatively good, because waterglass price is somewhat expensive, so the manufacturing cost of molding sand is also higher, and And water-glass sand is in actual use, occur the problems such as knockout is difficult and old sand is not easy to regenerate.

A variety of casting flaws, such as sand holes, crackle, stomata, shrinkage cavity often occur in process of production for casting Deng, and the generation of crackle is relevant with the condensation rate of casting, in the prior art using quartz sand as casting sand formula come cold Solidifying casting, but quartz sand condensing capacity is weak, and the coefficient of expansion is big, occurs that casting is locally unexpected using quartz sand and clay merely Expansion status, so as to casting partial condensation occur, so that casting condensation rate is uneven, stress is produced, is easily cracked And shrinkage cavity.

The content of the invention

The technical problem to be solved in the present invention is to provide a kind of sand formulation, can solve the problem that in general sand cast condensation speed Degree is uneven and cracks and the problem of shrinkage cavity, and reuse effect difference the problem of.

In order to solve the above technical problems, the technical scheme is that：A kind of sand formulation, its innovative point are：By weight Amount number is made up of following component：15 ~ 25 parts of clay-bonded sand, 15 ~ 25 parts of quartz sand, white 20 ~ 25 parts of sand, magnesia 20 ~ 25 Part, 8 ~ 15 parts of diatomite, 5 ~ 8 parts of pitchstone, 3 ~ 6 parts of rosin, 2 ~ 5 parts of gypsum, 5 ~ 10 parts of coal dust, binding agent 25 ~ 35 Part, 10 ~ 15 parts of curing agent, 5 ~ 10 parts of brown alundum powder, 10 ~ 13 parts of water.

The advantage of the invention is that：

1）The present invention is compared with prior art using clay-bonded sand as raw material so that adhesive property of the invention protrudes, the present invention The secondary use that simple, cost is cheap but also is applied to after sand formulation recovery is not only made, greatly reduces use cost.It is white The coefficient of expansion is smaller when sand and heated magnesia, and the roughing sand as casting sand formula is mixed using white sand and magnesia with quartz sand, drops The coefficient of expansion of low quartz sand so that casting condensation rate is uniform, and cast(ing) surface is not likely to produce crackle and shrinkage cavity after condensation；Add Coal dust and clay can cause the viscosity enhancing of casting sand.

Embodiment

The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this It is bright to be limited among described scope of embodiments.

Embodiment 1：

A kind of sand formulation, it is made up of in parts by weight following component：15 parts of clay-bonded sand, 15 parts of quartz sand, white 20 parts of sand, 20 parts of magnesia, 8 parts of diatomite, 5 parts of pitchstone, 3 parts of rosin, 2 parts of titanium dioxide, 5 parts of coal dust, 25 parts of binding agent, firmly 10 parts of agent, 5 parts of brown alundum powder, 10 parts of water.

Above-mentioned material is mixed and stirred, then it is heated, persistently to it while heating It is stirred, is heated to temperature and reaches 220 DEG C, stop heating, sand formulation finished product is produced after being cooled to normal temperature.

Embodiment 2：

A kind of sand formulation, it is made up of in parts by weight following component：20 parts of clay-bonded sand, 20 parts of quartz sand, white 22 parts of sand, 22 parts of magnesia, 11 parts of diatomite, 7 parts of pitchstone, 5 parts of rosin, 4 parts of titanium dioxide, 7 parts of coal dust, 30 parts of binding agent, 13 parts of curing agent, 7 parts of brown alundum powder, 12 parts of water.

Embodiment 3：

A kind of sand formulation, it is made up of in parts by weight following component：25 parts of clay-bonded sand, 25 parts of quartz sand, white 25 parts of sand, 25 parts of magnesia, 15 parts of diatomite, 8 parts of pitchstone, 6 parts of rosin, 5 parts of titanium dioxide, 10 parts of coal dust, binding agent 35 Part, 15 parts of curing agent, 10 parts of brown alundum powder, 13 parts of water.

It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation Merely illustrating the principles of the invention described in book, without departing from the spirit and scope of the present invention, the present invention also have Various changes and modifications, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention By appended claims and its equivalent thereof.

Claims

A kind of 1. sand formulation, it is characterised in that：It is made up of in parts by weight following component：15 ~ 25 parts of clay-bonded sand, quartz 15 ~ 25 parts of sand, white 20 ~ 25 parts of sand, 20 ~ 25 parts of magnesia, 8 ~ 15 parts of diatomite, 5 ~ 8 parts of pitchstone, 3 ~ 6 parts of rosin, titanium 2 ~ 5 parts of white powder, 5 ~ 10 parts of coal dust, 25 ~ 35 parts of binding agent, 10 ~ 15 parts of curing agent, 5 ~ 10 parts of brown alundum powder, water 10 ~ 13 parts.