1. Industry Background and Challenges‌

In mining and metallurgical production processes, large volumes of corrosive media—such as acidic solutions, alkaline liquids, and organic solvents—must be handled. These substances are not only highly corrosive but may also contain solid particles or other impurities, imposing stringent demands on pump materials, sealing performance, and operational stability. Selecting the appropriate pump solutions is critical to ensuring continuous and safe production.

2. Overview of Anhui Changyu Pump & Valve Solutions‌

Anhui Changyu Pump & Valve Manufacturing Co., Ltd. has developed a range of specialized pump products tailored to the unique demands of the mining and metallurgical industries. Below are the key pump solutions offered:

‌2.1. Corrosion-Resistant Magnetic Drive Pumps‌

• ‌Working Principle‌: Utilizes magnetic coupling technology to eliminate mechanical seals, ensuring leak-free operation.
• ‌Materials & Applicable Media‌: Constructed with high-performance corrosion-resistant alloys (e.g., 304, 316, 316L stainless steel, Hastelloy), ideal for handling highly corrosive fluids.
• ‌Advantages‌: Compact design, smooth operation, and suitability for diverse corrosive media in mining and metallurgical processes.

‌2.2 Plastic-Lined Slurry Pumps‌

• ‌Applications‌: Designed for corrosive slurries such as phosphoric acid slurry and fluorosilicic acid slurry.
• ‌Features‌: Plastic-lined interior for enhanced corrosion resistance, combined with superior abrasion resistance for particle-laden media.
• ‌Advantages‌: Easy maintenance and reliable performance, making them ideal for slurry transportation in mining and metallurgy.

‌2.3 Stainless Steel Centrifugal Pumps‌

• ‌Materials‌: Premium stainless steel construction for excellent corrosion and high-temperature resistance.
• ‌Applications‌: Suitable for seawater, brine, organic solvents, and other corrosive media at varying concentrations.
• ‌Advantages‌: Compact structure, high efficiency, and versatility for diverse corrosive fluid handling needs in the industry.

3. Detailed Application Scenario Analysis‌

‌3.1. Ore Processing‌

• ‌Process Description‌: Involves crushing, grinding, and leaching of ores, requiring handling of large volumes of corrosive media.
• ‌Pump Selection‌: Corrosion-resistant magnetic drive pumps and stainless steel centrifugal pumps are ideal for ore processing, ensuring stable transportation and leak prevention.

‌3.2 Flotation Separation‌

• ‌Process Description‌: Separates valuable minerals from waste rock via flotation technology, involving corrosive reagents.
• ‌Pump Selection‌: Plastic-lined slurry pumps excel in flotation due to their corrosion and abrasion resistance.

‌3.3 Smelting & Extraction‌

• ‌Process Description‌: Operates in high-temperature, high-pressure environments with corrosive media.
• ‌Pump Requirements‌: Pumps must resist corrosion, high temperatures, and pressure. Magnetic drive pumps and stainless steel centrifugal pumps are preferred for their superior performance.

‌3.4 Tailings Treatment‌

• ‌Process Description‌: Handles slag and tailings containing solid particles and acidic waste liquids.
• ‌Pump Selection‌: Plastic-lined slurry pumps, balancing corrosion and abrasion resistance, are optimal for tailings processing.

3.5 Cooling Circulation‌

• ‌Process Description‌: Requires corrosion-resistant cooling media circulation in smelting.
• ‌Pump Requirements‌: Pumps must resist corrosion and ensure long-term stability. Stainless steel centrifugal pumps are well-suited for this application.

4. Conclusion‌

Leveraging extensive expertise and cutting-edge technology in pump and valve manufacturing, Anhui Changyu Pump & Valve Manufacturing Co., Ltd. delivers a comprehensive range of high-efficiency, reliable pumping solutions tailored for the mining and metallurgical industries. These solutions not only address the industry's specialized requirements for handling corrosive media but also enhance operational stability and safety in production processes.

Moving forward, as technology evolves and industry demands continue to shift, Anhui Changyu Pump & Valve remains committed to innovation and R&D, striving to provide the mining and metallurgical sectors with superior pump products and technical services.

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Overview

ICI pilling tester is a professional test equipment specially used to evaluate the anti-pilling performance of textile surface. The instrument provides objective data for textile quality control by simulating the friction effect of fabrics in daily use.

Main uses

1. Textile quality evaluation

(1) Used to determine the ability of various woven fabrics, knitted fabrics and non-woven fabrics to resist surface pilling during wearing and washing.

(2) Evaluate the anti-pilling performance of different fabrics (such as wool, cotton, chemical fiber and their blended fabrics).

(3) Provide objective basis for product quality control for textile manufacturers.

2. Product R&D support

(1) Help R&D personnel compare the anti-pilling properties of different fiber materials, yarn structures and fabric structures.

(2) Evaluate the effects of new textile materials or special finishing processes (such as anti-pilling treatment).

(3) Provide data support for product improvement and optimize production process parameters.

3. Standard compliance testing

(1) Implement pilling tests of international standards (such as ISO 12945), national standards (such as GB/T 4802.1) and industry standards.

(2) Provide compliance test reports for product certification.

(3) Ensure that exported textiles meet the quality requirements of the target market.

4. Consumer experience prediction

(1) Simulate the surface changes of fabrics under normal use conditions.

(2) Predict the appearance retention of products after actual wearing and washing.

(3) Provide consumers with product quality reference.

Application industries

(1) Garment manufacturing industry (especially high-end suits, sweaters and other products prone to pilling).

(2) Home textile industry (sheets, sofa fabrics, etc.).

(3) Industrial textiles.

(4) Quality inspection agencies and third-party testing laboratories.

(5) Textile colleges and research institutions.

ICI pilling tester provides the textile industry with an important tool for evaluating product durability and appearance retention through standardized testing methods, which plays an important role in improving product quality and consumer satisfaction.

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Tel: +86-596-7686689

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This article analyzes the available pump types for specific media to help you make a faster and more effective selection, and also provides some data for your reference.

 

1.Working condition characteristics analysis

 

Medium characteristics

Strong acidity: pH=2 is a strong acid environment, and the acid corrosion resistance of the material needs to be considered

 

Oxidation: The medium has oxidizing properties, and the material's antioxidant capacity needs to be evaluated

 

Containing solid particles: The presence of small sand particles will cause wear problems (it is recommended to confirm the particle size distribution and concentration)

 

2.Material selection

 

2.1 It is recommended to use PTFE (polytetrafluoroethylene) or F46 lined pump body, which has the following features:

 

✓ Strong acid resistance (applicable to the full range of pH 0-14)

✓ Excellent oxidation resistance

✓ Smooth surface and not easy to scale

2.2 Mechanical seals are recommended to use SiC/SiC pairing, which is more resistant to particle wear than graphite

 

2.3 Key selection parameters

 

Required notes Speed ≤ 2900rpm: reduce particle erosion and wear

Impeller type semi-open/open impeller: avoid blockage of closed impeller flow channel

Gap design is 0.3-0.5mm larger than standard pump to accommodate particle passage

Shaft seal type: double-end mechanical seal + flushing water (Plan53B external flushing solution is recommended)

 

 

3. Special design points

 

Wear-resistant structure

The impeller front cover is thickened by 2-3mm

A replaceable wear-resistant plate is set at the volute of the pump body

The surface of the flow-through parts can be hardened

 

4. Operation suggestions

 

It is recommended to install a Y-type filter at the inlet (the mesh size is determined by the particle size)

The minimum flow rate should be >30% Qn to prevent solid deposition

The flow channel should be flushed in time when the machine is shut down

 

5. Recommended typical models

 

Domestic: IHF80-65-160 fluoroplastic centrifugal pump (with wear-resistant modification kit)

Imported: CPK80-200F (with impeller for granular media)

If the budget is li mited, you can consider: FSB80-50-200 (need to confirm the actual particle parameters)

 

If you have better ideas, please leave a message. We are happy to learn new knowledge and provide better service.

Attached is the performance curve of our IHF chemical pump：

I. Instrument Introduction

ICI Mace Snag Tester is a test device used to evaluate the snagging tendency of fabrics when subjected to sharp objects. The instrument is widely used in the anti-snagging performance test of textiles, knitwear, woven fabrics and other materials, and is suitable for quality control, product development and standard testing.

II. Test Standards

ICI Mace Snag Tester is usually tested according to the following standards:

(1)ASTM D3939 (Standard Test Method for Snagging Resistance of Fabrics (Mace Test Method))

(2)ISO 16547 (Textiles — Determination of fabric propensity to snagging — Mace test)

(3)BS 5811 (British Standard)

III. Preparation before testing

1. Instrument inspection

(1) Make sure the instrument is placed horizontally to avoid vibration interference.

(2) Check whether the rotating arm and test pin (mace) are intact and free of wear or deformation.

(3) Ensure that the inside of the test box is clean and free of residual fibers or impurities.

2. Sample preparation

(1) Sample size: at least 200mm × 200mm (it is recommended to cut into a circle to fit the test box).

(2) Number of samples: usually 3-5 samples are tested to improve data accuracy.

(3) Sample status: should be humidified for at least 24 hours under standard atmospheric conditions (20±2℃, 65±4% RH).

3. Calibration (if necessary)

Use standard calibration fabric to calibrate the instrument to ensure consistency of test results.

Check whether the rotation speed meets the standard (usually 60±2 rpm).

IV. Test steps

1. Install the sample

(1) Fix the sample flatly on the sample clamp in the test box to ensure that there are no wrinkles.

(2) Adjust the sample tension so that it is close to the inner wall of the test box but not overstretched.

2. Set test parameters

(1) Test time: usually 600 revolutions (about 10 minutes), or adjust according to standard requirements.

(2) Rotation speed: 60 rpm (default value).

3. Start the test

(1) Close the test box door and ensure that it is securely locked.

(2) Press the start button and the instrument starts running.

(3) Avoid opening the door or interfering with the instrument operation during the test.

4. End of the test

(1) After the instrument stops automatically, remove the sample.

Inspect the surface of the sample for any snagging and record the number, length and severity of snagging.

V. Result Evaluation

1. Rating Method

Usually, visual rating method is used to judge by comparing with standard sample photos or rating cards:

Grade 1: Severe snagging (many long snagging)

Grade 2: Moderate snagging (obvious snagging)

Grade 3: Slight snagging (a few short snagging)

Grade 4: Almost no snagging (very slight)

Grade 5: No snagging (perfect)

2. Data Recording

(1) Record the snagging level of each sample.

Calculate the average value as the final test result.

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In modern manufacturing, hot melt adhesive is widely used in various industries, including packaging, woodworking, electronics, and automobiles. However, the traditional manual scraping gun method has some inconveniences in large-scale production, such as low production efficiency and high labor costs. In order to overcome these challenges, engineers have developed hot melt adhesive automatic scraping gun technology, providing companies with a tool to improve efficiency and reduce costs.

Limitations of traditional manual scraper guns

In traditional hot melt adhesive applications, workers need to manually bring the hot melt adhesive gun close to the target surface and manually control the spraying and scraping process of the hot melt adhesive. This method has several disadvantages. First, the manual scraper gun needs to be repeatedly positioned and controlled, and the errors caused by this are difficult to avoid, resulting in uneven coating and unstable quality. Second, long-term use of manual scrapers can easily cause worker fatigue and reduce worker work efficiency. In addition, manual scrapers also cause waste of hot melt adhesive because operators often find it difficult to accurately control the amount of hot melt adhesive used.

Advantages of hot melt adhesive automatic scraper

In order to solve the problems of traditional manual scraper, automation technology is gradually applied to the hot melt adhesive field. The hot melt adhesive automatic scraper system consists of a coater, a sensor and a control system. The coater can spray the hot melt adhesive evenly onto the target surface through precise control. At the same time, the sensor can monitor the shape and state of the target surface and automatically adjust the height and speed of the scraper to ensure the consistency and accuracy of the coating. The control system can realize the automated hot melt adhesive scraper process according to the preset parameters and process requirements.

Application fields of hot melt adhesive automatic scraper

Hot melt adhesive automatic scraper technology has been widely used in many industries. In the packaging field, it is used in carton sealing, bag sealing, tape bonding and other links to improve production speed and quality stability. In the woodworking industry, hot melt adhesive automatic scraper can be used in furniture manufacturing, board bonding and other processes to improve production efficiency and product quality. In the electronics industry, automatic scrapers can be used in circuit board assembly, component packaging and other processes to improve work efficiency and reliability. In the automotive manufacturing field, hot melt adhesive automatic scraper can be used in body sealing, interior bonding and other processes to improve bonding effect and product reliability.

The application of hot melt adhesive automatic scraper technology has brought great benefits to all walks of life. It can improve production efficiency, reduce labor costs, ensure the consistency of coating quality, and reduce the waste of hot melt adhesive. With the continuous development of automation technology, hot melt adhesive automatic scraper will be used in a wider range of fields and continue to create greater economic benefits and development opportunities for enterprises.

As an efficient and convenient bonding equipment, hot melt adhesive machine is widely used in packaging, textile, automobile manufacturing and other fields. However, in actual use, hot melt adhesive machine often encounters a thorny problem - carbonization. The generation of carbonization not only affects the normal operation of the equipment, but may also lead to product quality degradation or even equipment damage. Therefore, understanding how to effectively prevent carbonization, the impact of carbonization on use, and the correct treatment method after carbonization is crucial to ensure the stability of the hot melt adhesive machine and extend its service life.

Carbonization is mainly caused by the following factors:

· Too high temperature: Hot melt adhesive needs to melt at a certain temperature, but if the temperature is set too high or the equipment is in a high temperature state for a long time, it will cause the colloid to decompose.

· Too long residence time: The hot melt adhesive stays in the heating system for too long and fails to be discharged in time, which is prone to oxidation and decomposition.

· Air ingress: If the equipment is not well sealed, oxygen in the air enters the adhesive tank or pipe, which will accelerate the oxidation reaction of the colloid.

· Material problem: Some types of hot melt adhesives are sensitive to high temperatures and are more prone to carbonization.

· Equipment aging: Hot melt adhesive machines that have been used for a long time may have problems such as aging of heating elements and failure of temperature control systems, which may lead to abnormal temperature increases.

In order to reduce the occurrence of carbonization of hot melt adhesive machines, the following are some practical preventive measures:

1. Reasonable temperature control

· Set the appropriate heating temperature according to the type of hot melt adhesive used. It is generally recommended to control the temperature at the lower limit of the recommended range to reduce the risk of colloid decomposition.

· Regularly check whether the temperature control system is accurate to avoid abnormal temperature rise due to equipment failure.

2. Shorten the residence time of colloid

· During the production process, minimize the residence time of hot melt adhesive in the heating system. The production process can be optimized to speed up the flow rate of colloid and reduce the time the colloid is exposed to high temperature.

· If the equipment is out of use for a long time, the residual colloid in the glue tank and pipeline should be cleaned in time to avoid carbonization due to long-term standing.

3. Maintain the tightness of the equipment

· Ensure that the hot melt adhesive machine's adhesive tank, pipes, nozzles and other parts are well sealed to prevent air from entering and contacting the adhesive.

· For open-design equipment, consider installing a dust cover or using an inert gas (such as nitrogen) for protection to reduce the occurrence of oxidation reactions.

4. Regularly maintain the equipment

· Regularly check the heating elements, temperature control system and pipe connections of the hot melt adhesive machine to ensure that the equipment is operating normally.

· When cleaning the adhesive tank and pipes, the residual colloid should be thoroughly removed to avoid excessive accumulation and carbonization.

5. Choose high-quality hot melt adhesive

· Different types of hot melt adhesives have different tolerance to high temperatures. It is recommended to choose products with good stability and anti-aging properties.

· When changing the brand or model of hot melt adhesive, be sure to test it first to ensure that it is compatible with the existing equipment.

6. Pay attention to the frequency of adding glue

·During the production process, hot melt glue should be added in an appropriate amount according to actual needs to avoid adding too much glue at one time, which will cause some glue to be carbonized due to long-term non-use.

Once carbonization is found in the hot melt adhesive machine, the following steps should be taken in time to deal with it:

1. Stop the equipment immediately

·When carbonization is detected, the hot melt adhesive machine should be turned off immediately and the heating operation should be stopped to prevent further carbonization.

·Cut off the power supply and wait for the equipment to cool down completely before proceeding with the subsequent operation

2. Clean carbides

· Use special tools or chemical cleaning agents to remove carbides on the adhesive tank, pipes and nozzles.

Common cleaning methods include:

o Mechanical cleaning: Use scrapers, brushes and other tools to manually remove carbides, which is suitable for mild carbonization. o Chemical cleaning: Select a cleaning agent suitable for hot melt adhesive materials (such as professional adhesive remover), inject it into the equipment and soak it for a period of time, and rinse it with clean water after the carbides soften.

o High temperature burning: For stubborn carbides, high temperature burning can be used for cleaning, but it is necessary to control the temperature to avoid damaging equipment components.

3. Check the equipment condition

· After cleaning, carefully check whether there is wear or damage to the glue tank, pipes and nozzles. If necessary, replace damaged parts in time to ensure the normal operation of the equipment.

· Check the performance of the heating elements and temperature control system to ensure that they are working properly.

4. Recalibrate the temperature setting

· Before restarting the equipment, recalibrate the temperature setting to ensure that it meets the requirements for the use of hot melt adhesive.

· Perform a trial run to observe whether the equipment is operating normally and whether the glue flows out evenly.

5. Strengthen daily maintenance

· Analyze the causes of carbonization problems that have occurred and formulate improvement measures to avoid similar situations from happening again.

· Strengthen the daily maintenance of equipment, clean the rubber tank and pipelines regularly, and ensure that the equipment is always in good condition.

The elastic string glue gun is specially developed and designed for the rubber application of sanitary napkins and diaper products. It has the advantages of uniform, delicate and strong covering power. It adopts an air-on-air-off design, which is responsive and reliable. Built-in filter can reduce failures caused by clogged nozzles. Built-in imported high-quality sealed structural components ensure stable operation and long-lasting durability of the gun body. The solenoid valve of the gun body can be powered by DC24V or AC220V according to the user's requirements. Can be modified and applied to other brands of hot melt adhesive equipment according to user requirements.

1. Application of the latest design concepts and balancing technology: Adopting the most advanced design concepts and balancing technology may mean higher work efficiency and a better user experience.

2. Increase the service life of the gun body and reduce maintenance: By improving the design and using high-quality components, the service life of the gun body is increased and maintenance costs are reduced accordingly.

3. Imported core components: The use of imported core components can improve the overall quality and stability of the spray gun, thereby extending its life and improving performance.

4. The number of glue breaks is as high as 3600 times/minute: This shows that the spray gun is fast and reliable in operation and is suitable for mass production needs.

5. Winding glue spraying method: ensure that each rubber band is firmly fixed within 360 degrees, improving product quality and efficiency.

6. High-efficiency and powerful back-extraction module: it can cleanly disconnect the glue, avoid unnecessary impurities or tailing, and ensure production quality.

7. Dual guide function: ensures that each rubber band can be wound accurately, avoiding waste and errors, and improving production efficiency and quality.

Hot melt glue machine is a common industrial equipment, widely used in carton packaging, cardboard manufacturing and other industries. It heats the solid glue block to convert it into molten glue, and then applies the glue to the cardboard by spraying or coating to achieve the bonding effect. The following will introduce the application of hot melt glue machine on cardboard.

1. Cardboard packaging: Hot melt glue machine plays the role of bonding cardboard in cardboard packaging. When making cartons, the cardboards need to be firmly connected to ensure that the structure of the carton is strong and can withstand heavy objects and vibrations during transportation. The hot melt glue machine can spray hot melt glue on the seams of the cardboard or other locations that need to be bonded. The glue liquid quickly cools to form a strong bonding layer, which firmly connects the cardboards together.

2. Cardboard repair: During cardboard packaging or carton transportation, the cardboard may be damaged or cracked due to external impact or other reasons. The hot melt glue machine can glue the damaged parts together by spraying hot melt glue, repair the damage of the cardboard, and maintain the integrity and service life of the cardboard.

The application of hot melt glue machine on cardboard has the following advantages:

1. High efficiency: The hot melt glue machine can quickly melt the solid glue block into a molten liquid, and the glue liquid quickly cools down after contacting the cardboard to form a strong adhesive layer. This high efficiency can improve production efficiency and reduce downtime in the process.

2. Uniform coating: The hot melt glue machine can achieve uniform spraying or coating of the glue liquid, ensuring that all parts of the cardboard can be fully bonded. This is very important for quality control in the cardboard manufacturing and packaging process.

3. Environmental protection: The hot melt adhesive used in hot melt adhesive machines is usually made of environmentally friendly materials, does not contain organic solvents and volatile organic compounds, and does not pollute the environment.

Hot melt adhesive machine provides a reliable bonding solution and is widely used in carton packaging, cardboard manufacturing and other industries, providing reliable packaging materials for product transportation and protection.

Hot melt glue machines are versatile tools widely used in various industries and for numerous applications. These machines have found innovative applications that have revolutionized the way we approach tasks requiring adhesion and precise bonding.

One of the most notable innovations in the application of hot melt glue machines is in the realm of packaging. Traditionally, packaging processes relied on adhesives that required drying time, leading to inefficiencies in production lines. However, hot melt glue machines offer a faster alternative that bonds instantly upon contact, significantly speeding up packaging operations and improving overall efficiency.

Another area where hot melt glue machines have made a significant impact is in the field of woodworking. These machines are now commonly used in woodworking shops for tasks such as edge banding, furniture assembly, and veneer application. The precise application of hot melt adhesive ensures strong and durable bonds, making it an indispensable tool for carpenters and woodworkers.

Beyond traditional industries, hot melt glue machines have also found innovative applications in fields such as crafts and DIY projects. Crafting enthusiasts use these machines to create intricate designs, attach embellishments, and assemble various materials with ease. The precision and control offered by hot melt glue machines make them essential tools for artists and hobbyists looking to bring their creative visions to life.

Moreover, hot melt glue machines have found applications in the medical industry, particularly in the assembly of medical devices and equipment. The sterile nature of hot melt adhesives, coupled with the ability to create strong bonds quickly, makes them ideal for medical applications where precision and reliability are paramount.

In conclusion, hot melt glue machines have evolved beyond simple tools for basic adhesion tasks to become indispensable assets in a wide range of industries. Their ability to provide instant bonding, precision application, and versatility have led to innovative applications that continue to push the boundaries of what is possible. As technology advances and new materials are developed, the applications of hot melt glue machines are likely to expand even further, driving innovation across multiple sectors.