Jan,06,2020
facebook twitter LinkedIn

Technology process of foundry sand


This paper describes in detail the production process of foundry sand by using natural quartz stone.
 
Natural foundry sand is a kind of natural quartz sand, which is suitable for all kinds of casting sand. The silica content is required to reach 97% - 99%. According to the needs of casting products, the specifications are 1-2 mesh, 2-4 mesh, 4-6 mesh, 6-8 mesh, 8-10 mesh, 10-20 mesh, 20-40 mesh, 40-70 mesh, 70-100 mesh, 100-140 mesh and above 140 mesh to 400mesh. The appearance of natural quartz sand for casting is polyhedral, spherical and pure white, which is characterized by high hardness, low iron content, high fire resistance, strong pollution resistance, good acid resistance, etc. in addition, the quartz sand size is determined according to the casting types used, such as resin sand casting, sodium silicate sand casting, lost foam casting and the requirements of casting material, casting size and surface finish, etc., the particle size requirements are generally selected within 40-90 mesh, so as to ensure the casting's quality Smooth and flat, greatly reducing the rework rate of castings.

foundry sand

Sinonine provides a method for industrial production of natural foundry sand. The method takes natural quartz stone as the main raw material, and produces foundry sand by cleaning, peeling, crushing, pickling, washing, drying, magnetic separation, gclassifing and other processes of natural quartz stone. The method has the advantages of using general equipment, less investment, low cost, no pollution and mass production The raw materials used to produce foundry sand are natural quartz stone, dilute hydrochloric acid with concentration of 14% - 16%, and water.

foundry sand

The production process of natural foundry sand consists of the following steps:
 
1.Send the selected large natural quartzite into the water washer, wash it with high-pressure water, remove the attachment on the outer surface of quartzite, and then send the cleaned large quartzite into the peeling machine to remove the yellow skin on the outer surface of the large quartzite.
 
2.Send the peeled large quartz stone to the crusher to be crushed into granular quartz sand, then send the quartz sand to the acid tank, and soak it in dilute hydrochloric acid with concentration of 14% - 16% for 24-30 hours.
 
3.After the acid pickling, the natural quartz sand in the acid tank shall be fished out, immediately sent to the sand washing machine for washing with high-pressure water, washed away the hydrochloric acid on the surface of quartz sand particles, and sent to the sand dryer for drying. The drying temperature is 70 ℃ - 80 ℃, and the drying time is 2.5-3.0 hours.
sand dryer

4.Send the dried natural quartz sand to the dry magnetic separator, remove the quartz sand containing magnetism, metal and metal oxide through the magnetic separator, and then send it to the vibrating screen for classification. The quartz sand is divided into 1-2 mesh, 2-4 mesh, 4-6 mesh, 6-8 mesh, 8-10 mesh, 10-20 mesh, 20-40 mesh, 40-70 mesh, 70-90 mesh, 90-140 mesh and 140-400 mesh, and is packaged for final foundry sand products.

foundry sand plant

The method has the advantages of simple process, convenient operation, less equipment investment, low cost, no pollution and mass production, and can produce high-quality natural foundry sand.

Remarks: the production of foundry sand requires the use of appropriate quartz stone raw materials. First, the composition of the raw materials is analyzed, and then the test is carried out. After the test is successful, it can be put into large scal production.

Lasted news & technology
Nov,16,2021

In this paper, the processing of photovoltaic glass ultra silica sand is introduced in detail. The Fe2O3 in silica sand is reduced to less than 90ppm by flotation with common quartz sand as raw material to meet the quality requirements of ph

Nov,13,2021

The most direct index to measure the purity of high purity quartz sand is the content of alkali metals, key transition elements, aluminum and boron in raw materials.

Oct,31,2021

How to reasonably design the water circuit and how to reuse the water produced in each section of the sand washing plant after treatment are very important issues.

Jun,26,2021

This article describes a sand washing plant for low expansion foundry sand.

Jun,24,2021

The sinonine team has invented sand washing plant of removing iron from quartz sand through continuous exploration.

Jun,15,2021

The season of continuous spring rain will still have a serious impact on the production of quartz sand.

Jun,10,2021

In the sand washing plant, if we want to produce high-purity quartz sand, we need to choose the right raw materials, so how to determine the raw materials of high-purity quartz sand?

Jun,07,2021

Due to its superior properties, spherical quartz powder is widely used in high-tech fields such as integrated circuit copper clad laminate, epoxy plastic sealant, aerospace, fine chemical industry and daily cosmetics.

Contact us

Thank you for your interests in Sinonine, Please feel free to submit your inquiry information to us, our expert will contact with you as soon as possible.

Name
Email
Tel
Country
Message
sinonine@9silica.com
+86-25-58875679
+86-18118821087