panoramic view of silica sand industry chain for Artificial quartz sheet slab

Silica slab has the characteristics of pollution-free, wear-resistant, scratch-resistant, corrosion-resistant, durable, and rich in color. In the world, silica slab has become an emerging green tabletop material, which is widely used in public buildings and home building materials.

The industrial chain process for silica slab is:

The raw materials for silica slab are quartz stone, pulverized stone, quartz sandstone, feldspar quartz ore, argillaceous quartz sand ore. The quartz sand raw material is passed through the silica sand processing&sand washing plant to make silica sand, and then silica sand and resin are mixed and made into silica slab, which can be used for making countertops, sinks, floors, walls, furniture and commercial decoration.

Silica sand processing & sand washing plant

Upstream - silica sand processing plant

I. What are the raw materials for silica slab?

In theory, all quartz mines can be made into silica slab. However, at present, mainly in the case of artificial quartz stone plates, it is mainly composed of veins. Quartz sandstone and the like have also begun to enter the slab manufacturing, but the proportion is not high. With the improvement of production technology, it is believed that more and more quartz materials can be used to make silica slab.

II. What is the process of the silica sand processing plant for slab?

The slab sand processing for silica slab is sand washing and crushing. The process is: quartz ore-crushing (magnetic separation)-mineralization (artificial, radio and electric beneficiation)-fine crushing (magnetic separation)-washing-dehydration-drying-screening ( Magnetic separation)-Selection (artificial, radio and electric beneficiation) (magnetic separation) - finished product

1. Silica sand processing equiment is very important!

The silica sand processing equiment determines the grain morphology of quartz sand products. It is recommended to use iron crushing equipment for the crushing of quartz sand. This is because the iron produced by the iron equipment can be removed by magnetic separation and pickling, and the grinding caused by the high-aluminum lining brick becomes white spots, which affects the appearance of the sheet. The wear of the alloy is non-conductive and strong, and it is difficult to use strong. The magnetic magnetic separator is cleaned and finally affects the original color of the board.

In the process of silica slab processing, the use of plastic products or wear-resistant measures to reduce secondary pollution.

Screen for silica slab may be a nylon screen instead of a stainless steel mesh.

Quartz sand powder should adopt the secondary dust collection system, the first level dust collection for the product, and the secondary product degradation.

2. Quartz sand magnetic separation for silica slab

Magnetic separation is an indispensable process for the production of quartz sand. Iron oxide with high content in quartz sand will also produce mechanical iron during the crushing. Iron will remain in the product, which will cause rust spots on the board and affect the appearance. The magnetic force of the high gradient magnetic separator is above 15000 Gauss, and the effective magnetic separation efficiency is 10000 Gauss. Only part of the iron oxide can be removed. Therefore, the number of magnetic selection cannot be less than 3 times, usually 5 times.

Midstream - Manufacturing of silica slab

Silica slab, also known as artificial quartz stone plate, is a new type of stone synthesized by more than 80% quartz crystal plus resin and other trace elements. It is a certain physical and chemical process through quartz sand plate production equipment. Large gauge sheet pressed under conditions.

I. What materials are needed to make silica slab (artificial quartz stone sheets)?

The raw materials for silica slab are:

5-100 mesh quartz sand: 60-63%

320-2500 acres of quartz powder: 28-32%

Unsaturated resin: 7-9%

Colorant and coupling agent: 0.4-0.6%

UV absorber: (resin amount) 0.5-1%

Decomposing agent: (resin amount) 0.5-1%

Curing agent: (resin amount) 0.8-1%

What are the requirements for quartz/silica powder on silica slab?

Slab slab are strict on silica sand products. Slab slab produced by silica sand processing plants need to meet the following requirements:

1. Quartz sand particles are round and unequal.

2. Quartz sand is fine and fine.

3. The coarse quartz sand has the same color.

4. Quartz sand contains low iron

5. Quartz sand moisture <0.5%

6. Quartz sand contains more than 98% silicon

7. Quartz sand powder whiteness > 90 degrees

II. What is the process flow of silica sand slab processing?

Select silica slab raw materials and ingredients, add color paste coloring, mix and stir the above materials, then cloth, press into the press, solidify, solidify the semi-finished product, and finally polish the block.

The press is the key equipment for the production of quartz stone. A good machine has the following characteristics:

1. The equipment is running stably and the maintenance rate is low.

2. The vacuum seal is good.

3. The resin content in the formulation is low.

4. Easy operation and maintenance.

III. What are the common problems in the production of quartz stone sheets/slab?

In the production process of quartz stone plates, due to improper operation control, various defects will occur. How to avoid these defects is a hot spot for enterprises.

1. Quartz stone plate deformation

The reasons for the deformation of quartz stone plates are:

a. Formula composition.

b. curing method.

c. Whether the curing is sufficient.

d. Semi-finished and finished product storage methods.

The solutions for the deformation of quartz stone plates are:

a. Develop a reasonable formula structure.

b. Use a reasonable curing method.

c. Allow the plate to heat up and down during the movement and fully heat.

d. Choose a reasonable storage method according to the quality of the resin.

2. Quartz stone plate discoloration

The reasons for the discoloration of quartz stone plates are:

a. Resin properties

b. colorant

c. curing agent

The solution to the discoloration of quartz stone plates is:

a. Using a stable resin

b. Use a heat curing agent to ensure that the curing agent can fully react without residue during heating

c. Using inorganic pigments, good weather resistance

3. Quartz stone plate discoloration

The reasons for the discoloration of quartz stone plates are:

a. Resin properties

b. toner

c. curing agent

The solution to the discoloration of quartz stone plates is:

a. Using a stable resin

b. Use a heat curing agent to ensure that the curing agent can react fully without residue during heating.

c. Using inorganic pigments, good weather resistance

4.The reasons why quartz stone plates have pores are:

a. Small pinhole - the vacuum is less than -0.1MPa, the resin content in the formula is too high

b. Large irregular voids - the formula structure is unreasonable, the fabric is uneven, the press is not dense when pressed, and the cloth is not evenly stressed.

The solutions for the pores of quartz stone plates are:

a. Use good vacuuming equipment, special vacuum pump oil, and maintain

b. The sealing of the press and the pipeline should be good, and the vacuum chamber of the press should be small.

c. Develop a good formula structure

d. Good molding equipment and mature production processes and operating procedures.

5.The reasons why quartz stone plates have watermarks are:

Local pressurization and uneven motion during the pressing process result in uneven distribution of the toner used inside the sheet.

The solutions for watermarking quartz stone plates are:

Under the control of mature production processes, this problem can be well prevented.

In addition, quartz stone plates may also have wear marks. Special grinding blocks should be used to reduce or eliminate such dark marks. Select a reasonable polishing speed according to the color and particle size of the watermark.

Downstream - application of silica slab

How is the market for quartz slab?

In recent years, under the prevalence of low-carbon, environmental protection, green and other new life claims, artificial silica slab that are more in line with the circular economy and energy conservation and environmental protection appeal have gradually become the mainstream trend of stone industry product development.

At present, the internationally mature silica slab market has Australia, the United States, Canada, the United Kingdom, France, Germany and other countries. Among them, Australia's annual consumption of silica slab accounts for 35% of the world, the United States accounts for 22%, and Canada accounts for 14%. The international market for silica slab has broad prospects.

After nearly ten years of development, the international quartz stone industry has greatly improved in terms of industry scale, number of employees, production capacity, and technical level. The demand for silica slab is growing, and many landmark buildings, villas, and large hotels can see the application of quartz stone plates.

Where can the silica slab be applied?

Silica slab can be used for ordinary kitchen countertops, furniture countertops, commercial decoration, TV background walls, wall decoration, ground parquet decoration, floor tiles, sinks, special countertops, etc.