Introduction to the Desulfurized Gypsum Powder Production Line
Product Overview
I. Product Overview
The desulfurized gypsum powder production line is an advanced production system specifically designed to process and transform desulfurized gypsum, an industrial by-product, into high-value-added building materials. This production line takes the desulfurized gypsum generated by enterprises such as power plants as the main raw material. Through a series of scientific and rigorous technological processes, it converts the raw material into high-quality gypsum powder products that meet the needs of different industries. With the increasing environmental protection requirements and the growing popularity of the concept of comprehensive resource utilization, this production line is of great practical significance. It not only helps enterprises realize the resource utilization of waste but also provides high-performance basic materials for industries such as construction.
Product Description
II. Technical Principles
(I) Raw Material Characteristics
The main component of desulfurized gypsum is calcium sulfate dihydrate (CaSO4·2H2O), usually with a content of ≥93%. It has a certain moisture content, with the attached water content being around 10 - 12%. This characteristic needs to be specially considered during the production process to ensure the stability of the product quality. Compared with natural gypsum, the crystal morphology of desulfurized gypsum is more regular, and the impurity content is relatively low, which provides favorable conditions for the production of high-quality gypsum powder.
(II) Core Technologies
1.Drying Technology: A paddle dryer is used, which utilizes low-pressure steam (saturated steam at 1.0 - 1.5Mpa with a temperature above 220°C) from the thermal power plant as the heat source, and at the same time, supplementary heat from the calcining furnace is added to assist in the drying process. This equipment can efficiently reduce the moisture content of the desulfurized gypsum raw material to an appropriate range, preparing it for the subsequent calcining process. The paddle dryer has the advantages of high heat transfer efficiency, small floor space, and stable operation, ensuring the efficiency and stability of the drying process.
2.Calcining Technology: The fluidized calcining technology is applied, and the dried raw material is fed into the desulfurized gypsum calcining furnace for calcination. Fluidized calcination enables the materials to be fully fluidized in the furnace and come into uniform contact with the heat medium, ensuring the uniformity of calcination, thus making the phase composition of the product more ideal. By precisely controlling the calcination temperature and time, calcium sulfate dihydrate is converted into β-hemihydrate gypsum (CaSO4·1/2H2O), which is the main component of building gypsum, and its performance directly affects the quality of the final product.
Technical Parameters
| Item |
Index |
| Capacity |
200-500 tons/day |
| Raw Material Size |
≤30mm (after crushing) |
| Finished Product |
80-200 mesh (adjustable) |
| Energy Consumption |
≤36.76kg standard coal/ton |
| Equipment Lifespan |
Core components (rolls, rings) ≥5 years |
III. Production Process
1.Feeding Link: The feeding loader sends the raw materials into the feeding hopper, which is equipped with a vibrating motor and a belt scale. The belt scale will feed the materials according to the pre-input and designed parameters, with an error of no more than 0.5 tons per hour, ensuring the accuracy and stability of the raw material conveying.
2.Drying Link: The desulfurized gypsum raw material is conveyed by a belt conveyor into the paddle dryer for drying. During the drying process, steam indirectly heats the materials through the internal channels of the paddle blades, and the supplementary heat from the calcining furnace further improves the drying efficiency. After drying, the moisture content of the raw material is greatly reduced, meeting the requirements of the calcination process.
3.Calcining Link: The dried raw material is lifted by a hoist and fed into the desulfurized gypsum calcining furnace for calcination. In the high-temperature environment of the calcining furnace, the dehydration and decomposition reaction of the gypsum raw material occurs, converting it into hemihydrate gypsum. The fluidized calcination technology ensures the uniform heating of the materials in the furnace, improving the calcination quality.
4.Grinding and Modification Link: The semi-finished product after calcination enters the pin mill for modification and grinding. The pin mill can further refine the gypsum particles and modify their surface properties, making their physical properties more in line with the usage requirements of industries such as construction. After grinding and modification, the product is conveyed to the finished product silo by a hoist or pneumatic conveying.
5.Storage and Packaging Link: After aging in the finished product silo for 3 days, the automatic packaging machine completes the packaging. The aging process helps to stabilize the product performance and improve the consistency of the product. The automatic packaging machine adopts advanced metering and packaging technologies to ensure that the weight of each bag of product is accurate, and the packaging is exquisite and firm, facilitating storage and transportation.
Our Advantages
IV. Product Advantages
(I) Reliable Quality
1.Production is carried out in strict accordance with the national standard of "Building Gypsum" (GB/T9776 - 2008), and the product quality is stable and reliable, which can meet the high-standard requirements of gypsum powder for gypsum mortar, gypsum blocks, and other gypsum building products.
2.Through the advanced production process and strict quality control system, the stability and consistency of key indicators such as the fineness, setting time, and strength of the product are ensured, providing high-quality basic materials for downstream users.
(II) Energy Saving and Environmental Protection
1.There is no secondary pollution emission during the whole production process of the production line. Dust is treated by a pulse bag filter, and the emission is lower than the national emission standard (dust emission ≤20mg/m³), effectively reducing environmental pollution.
2.The waste heat of the power plant is fully utilized as the heat source, which greatly reduces energy consumption, realizes the efficient utilization of resources, and meets the national requirements for energy conservation and emission reduction.
(III) High Efficiency and Stability
1.The production line adopts an advanced automatic control system, and each device works in coordination, with stable and reliable operation and high production efficiency. The annual production capacity of β-hemihydrate gypsum powder is ≥27.8 tons per hour, which can meet the needs of large-scale production.
2.The equipment has been carefully selected and optimized in design, with a long service life and low maintenance cost, providing a strong guarantee for the long-term stable production of enterprises.
V. Application Fields
1.Construction Industry: It can be widely used in the production of building materials such as gypsum mortar, gypsum blocks, and gypsum boards. Gypsum mortar has good water retention, adhesion, and construction performance, which can improve the flatness and aesthetic degree of the wall surface; gypsum blocks have the advantages of light weight, sound insulation, heat insulation, and fire prevention, and are ideal new wall materials; gypsum boards are widely used in interior decoration for ceilings, partitions, and other parts, with the characteristics of convenient installation and good decorative effect.
2.Industrial Molds: Due to the good formability and dimensional stability of gypsum powder, it can be used to make industrial molds, such as ceramic molds and plastic molds. In ceramic production, gypsum molds can accurately replicate the shape of ceramic blanks, ensuring the quality and consistency of products; in the production of plastic molds, gypsum powder can be used as a prototype material, providing a basis for subsequent mold processing.
3.Artistic Models: In the field of artistic creation, gypsum powder is widely used to make various artistic models, such as sculptures and handicrafts. Its delicate texture and easy processing characteristics can meet the high requirements of artists for creative materials, making the works more vivid and lifelike.
After Sales Service
VI. Service Support
1.Pre-sales Service: The professional technical team will provide customers with personalized production line design schemes according to their actual needs and site conditions. From raw material analysis, process flow planning to equipment selection, we will provide comprehensive consultation and suggestions to ensure the rationality and effectiveness of customers' investment.
2.In-sales Service: In strict accordance with the contract requirements, the manufacturing, installation, and commissioning of the production line will be completed on time and with high quality. During the installation and commissioning process, we will provide on-site technical training for customers so that their operators can master the operation skills and maintenance points of the equipment proficiently.
3.After-sales Service: A perfect after-sales service system has been established to provide customers with 24-hour technical support and after-sales service. Regularly visit customers to understand the operation status of the equipment and promptly solve the problems encountered by customers during the use process. At the same time, we also have sufficient spare parts in stock to ensure the normal operation of the equipment.
In conclusion, this desulfurized gypsum powder production line has advanced technology, reliable quality, good environmental protection performance, and a wide range of application fields. We will wholeheartedly provide customers with high-quality products and perfect services and work hand in hand with customers to create a better future.
FAQ
Q1. What kind of enterprises is this desulfurization gypsum powder production line suitable for?
A:Our production line can be flexibly customized according to the needs of enterprises. Whether it's small businesses trying resource integration in their early stages or large enterprises expanding their production scale, we can find suitable solutions. From small-scale operations with hourly capacities of just a few tons to large-scale projects with annual capacities of hundreds of thousands of tons, we can meet the development plans of enterprises of all sizes.
Q2. How much area does the production line cover?
A:The footprint varies depending on the production line size and specific configuration. Generally, a small production line may occupy only a few hundred square meters, while a large complete production line, including raw material storage areas, production workshops, and finished product storage zones, could require several thousand square meters. We will optimize the layout based on your site conditions during the design phase to maximize land use efficiency.
Q3. What is the unique feature of the drying technology used in the production line?
A:Using a paddle dryer, low-pressure steam from a thermal power plant serves as the primary heat source, supplemented by additional heat from a calcination furnace. Compared to traditional drying methods, the paddle dryer boasts higher heat transfer efficiency, enabling rapid and uniform moisture removal from desulfurization gypsum materials. It has a small footprint, effectively saving space, and operates stably, reducing the risk of equipment failure and ensuring efficient operation throughout the drying process.
Q4. What are the improvements of product quality by fluidized calcination technology?
A:Fluidized calcination ensures that the material is fully fluidized within the furnace and comes into uniform contact with the heat medium, guaranteeing uniform calcination. This allows for precise control of calcination temperature and time, promoting more efficient and stable conversion of calcium sulfate dihydrate into β-type hemihydrate gypsum. The product phase composition is more ideal, with good crystalline morphology, which enhances key performance indicators such as strength and setting time, ensuring the stability and consistency of product quality.
Q5.What are the advantages of energy consumption compared to other similar production lines?
A:Our production line is designed with full consideration of energy efficiency. By utilizing the residual heat from power plants, we have reduced our reliance on traditional high-energy-consuming sources. For instance, in the drying process, paddle dryers efficiently use steam thermal energy, significantly lowering energy consumption compared to methods that rely on direct fuel combustion. Throughout the entire production process, through optimized equipment selection and automated control, unnecessary energy waste has been minimized. The overall energy consumption remains at a low level within the industry, helping to save operational costs for the company.
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