Natural dihydrate gypsum (CaSO4 · 2H2O) is also called raw gypsum. After calcination and grinding, β-type hemihydrate gypsum (CaSO4 · ½ H2O) can be obtained, that is, building gypsum, also known as plaster and plaster.
Description of Natural Gypsum Production Process
The gypsum ore raw materials are piled from the raw materials to the receiving steel hopper with a loader. The large gypsum ore is crushed to the particle size required by the process through the crushing equipment, and the materials that meet the particle size requirements are stored in the raw material bin through the conveying equipment. Small pieces of materials are measured and transported to the mill for grinding, and the bulk materials in the mill will be ground into powdery materials to meet the fineness required by the process. The powder passes through the conveying equipment to the buffer bin for caching. Then the powder is evenly transported to the gypsum powder calcination equipment through the metering feeding equipment, where the gypsum powder will complete the conversion from dihydrate gypsum to hemihydrate gypsum. After calcination, it is ground and modified by ball mill, cooled by cooling equipment, and then transported to the finished warehouse for storage and aging by conveying equipment.
Introduction to Natural Gypsum
Natural dihydrate gypsum (CaSO4 · 2H2O) is also called raw gypsum. After calcination and grinding, β-type hemihydrate gypsum (CaSO4 · ½ H2O) can be obtained, that is, building gypsum, also known as plaster and plaster. Gypsum mines are mainly sedimentary deposits, with reserves accounting for more than 90% of the country's total, while epigenetic and hydrothermal metasomatic gypsum mines are not very important. Gypsum mines have been produced in all geological ages, with early Cretaceous and Tertiary sedimentary gypsum mines being the most important.
The most widely used natural gypsum is dihydrate gypsum. Its active ingredient is calcium sulfate dihydrate. Generally, gypsum is classified according to the content of calcium sulfate dihydrate in the ore. Gypsum has a wide range of applications and many types of products. Different uses have different requirements for the quality of gypsum raw materials. High-grade gypsum is mostly used as raw materials for the production of special gypsum products, such as food, medical, artwork, models and chemical Fillers, etc.; gypsum mines with calcium sulfate dihydrate content lower than 60% are rarely used; gypsum ores with higher than 60% are used according to their content, it is used in building materials, construction and other fields.
With the development of gypsum products industry, gypsum powder for various purposes has also been applied one after another, especially in the building materials industry. Therefore, with the increasing number of high-rise buildings and the gradual deepening of the national wall reform work, gypsum powder has become a tight product in the building materials market. Furthermore, gypsum powder production lines are also widely used.
Gypsum powder production line working principle
The working principle of gypsum powder production is to add raw gypsum and desulfurization gypsum from the feed port, effectively contact with the outer wall of the heat exchange tube in the cylinder, use the boiling furnace flue gas as the medium to heat and calcine the desulfurization gypsum, and the calcined product is collected from the discharge port. Because of indirect heat exchange, a higher local pressure of steam can be obtained in the cylinder, which has a positive impact on the product quality. In addition, gypsum has no direct contact with the heating medium, thus maintaining the purity of the product to a large extent. The indirect heat exchange rotary calcination machine technology can effectively control the removal of gypsum from dihydrate gypsum into hemihydrate gypsum by strictly controlling the calcination strength. The main technology used in this process uses a boiling furnace to provide a heat source, which can greatly reduce coal consumption and make full use of heat. The daily production is 100-1000 tons. It is an ideal equipment in the current industrial gypsum calcination process.
Structural composition
1、Crushing system:
The gypsum raw material enters the crusher through the feeder, and the crusher crushes the large-size gypsum ore into small particles less than 30mm for later use. According to the size of gypsum raw materials and different output requirements, you can choose crushers of corresponding specifications, usually Baidu PE jaw crusher, PC hammer crusher or PF impact crusher. In order to protect the environment and clean, dust removal equipment can be equipped to meet environmental protection emission requirements.
2、Raw material transportation:
The crushed gypsum raw materials are transported to the storage bin for standby through the hoist. The storage bin is designed according to the requirements for material storage time to ensure a stable supply of materials.
3、Grinding system:
The materials are uniformly and continuously fed into the mill by the electromagnetic vibrating feeder for grinding. The ground gypsum raw powder is blown out by the air flow from the mill blower and classified by the analyzer above the main machine. Powder with fineness in line with specifications enters the cyclone collector with the wind flow, and is discharged through the powder outlet pipe after collection as the finished product. The finished product falls into the screw conveyor and is transported to the next system for calcination. The entire air path system is closed and circulated. The bag filter is introduced from the pipe between the cyclone collector and the blower to remove dust in the air, and then discharged into the environment to ensure a clean environment. The particle size of the material passing through the grinding system is changed from 0~30mm to 80~120 mesh, which meets the fineness requirement of gypsum powder.
4、Calcination system:
The system mainly includes hoist, boiling furnace, electrostatic dust removal, Roots blower and other equipment. The boiling furnace used is currently a widely used building gypsum calcination equipment in my country. It has small equipment, large production capacity, simple structure, compact equipment, small footprint, low energy consumption, convenient operation, easy to achieve automatic control, and good product quality. The composition is relatively ideal, the physical performance is stable, the infrastructure investment is low, and the operating cost is low. It is widely used in the calcination process of natural gypsum and chemical gypsum.
5、Electrical control system:
The electrical control system adopts the current centralized control, DCS control or PLC control, and each control element is made of internationally renowned brand products.
The above is a specific introduction to the working principle and structure of the gypsum powder production line, hoping to be helpful for everyone to further understand.
FAQ:
Q1:Are you trading company or manufacturer ?
A1:We are a professional gypsum board producing line manufacturer for more than 12 years.
Q2:How long is the warranty of your equipment?
A2:1year
Q3:How long is your delivery time?
A3:Generally it is 5-10 days if the goods are in stock. or it is 15- 20 days if the goods are not in stock, it is according to quantity.
Q4:What is your terms of payment ?
A4:We can accept L/C or T/T. Payment< =1000USD, 100% in advance. Payment> =1000USD, 30% T/T in advance,balance before shippment.
Q5:Do you supply spare parts?
A5:Excellent easy broken parts support for buyers. Easy broken parts guarantee for one year.
Q6:How will you provide installation &commissioning ?
A6:Arrange practised techicians installing and training oversea as soon as you receive the machines .
Q7: Do you provide samples ? is it free or extra ?
A7: Yes, we could offer the sample for free charge but do not pay the cost of freight.
