Owing to its advantages of large specific surface area, adjustable pore structure, excellent adsorption performance, surface acidity and good thermal stability, activated alumina is widely used as an adsorbent, water purifier, catalyst and catalyst support in fields such as pharmaceuticals, chemical engineering, metallurgy, water purification, chemical analysis and waste gas treatment. It plays a particularly important role in reaction processes including petroleum hydrocracking, hydrofining, hydroreforming, dehydrogenation and automobile exhaust purification.

1.Applications of Activated Alumina in the Adsorption Field

As an adsorbent constitutes one of the primary applications of activated alumina, which is mainly attributed to its numerous favorable properties such as large specific surface area, rational pore structure, excellent physical properties and good chemical stability. Its major industrial applications include gas drying, liquid drying, water purification treatment, and selective adsorption in the petroleum industry.

2.Applications in Water Purification

The application of activated alumina in the water purification field has been developing rapidly. Its water treatment applications mainly focus on fluoride removal, decolorization, odor elimination and phosphate removal.

3.Applications in Gas Drying

Owing to its strong affinity for water, activated alumina exhibits excellent performance in drying moisture from gases. It is capable of drying more than twenty types of gases, including acetylene, hydrogen, oxygen, air and nitrogen.

4.Applications in Liquid Drying

Liquid drying is far more complex than gas drying, and the requirements for desiccants are relatively higher. First, no chemical reactions shall occur between the components of the liquid, or between the liquid and the adsorbent during their contact. Second, the substances adsorbed during liquid drying must be removable via rinsing during the regeneration process. At present, the liquids proven to be dryable by activated alumina include aromatic hydrocarbons, high-molecular olefins, gasoline, kerosene and the like.

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Activated alumina ceramic balls feature a porous structure and large specific surface area, enabling them to effectively adsorb fluoride ions in water. Their fluoride removal mechanism mainly consists of the following two aspects:

1. Adsorption

The porous structure of activated alumina ceramic balls provides an extremely large specific surface area, which means that per unit mass of alumina ceramic balls has a vast surface area and can offer abundant adsorption sites for fluoride ions. During the water treatment process, when the water containing fluoride ions flows through the activated alumina ceramic ball layer, the fluoride ions are firmly adsorbed on the surface under the action of adsorption force from the alumina ceramic ball surface. This adsorption is not only rapid but also highly efficient, allowing activated alumina ceramic balls to quickly remove fluoride ions from water. In addition, the pore size distribution of activated alumina ceramic balls plays a crucial role in fluoride removal efficiency. A proper pore size can ensure that fluoride ions smoothly enter the interior of the pores, thereby enhancing the adsorption efficiency. Studies have shown that the optimal fluoride removal effect is achieved when the pore size of activated alumina ceramic balls ranges from 2 to 10 nanometers.

2. Chemical Reaction

In addition to adsorption, the active sites on the surface of activated alumina ceramic balls can also react chemically with fluoride ions to form stable compounds. Such chemical reactions include redox reactions, coordination reactions, etc. For instance, the aluminum ions on the surface of alumina ceramic balls can combine with fluoride ions to form stable aluminum fluoride complexes. These complexes are insoluble in water, thus realizing the removal of fluoride ions.

In practical applications, the fluoride removal efficiency of activated alumina ceramic balls is affected by various factors, such as water pH value, temperature, and fluoride ion concentration. Under appropriate conditions, activated alumina ceramic balls can efficiently remove fluoride ions from water, providing people with safe and healthy drinking water.

However, activated alumina ceramic balls also have certain limitations in the fluoride removal process. For example, when the fluoride ion concentration in water is excessively high, the adsorption capacity of activated alumina ceramic balls may become saturated rapidly, resulting in a decline in fluoride removal efficiency. In addition, the regeneration and recycling of activated alumina ceramic balls are also issues that need to be considered. In practical applications, to improve the fluoride removal efficiency of activated alumina ceramic balls, appropriate modifications are usually required, such as loading metal ions and preparing composite materials.

In conclusion, as a high-efficiency fluoride removal material, activated alumina ceramic balls have broad application prospects in water treatment and industrial fields. Through in-depth research and continuous optimization of the fluoride removal principle, we are expected to further improve the fluoride removal efficiency of activated alumina ceramic balls, making greater contributions to environmental protection and water resource utilization.

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Doing a good job in safety work in one's personal position is an important task that every employee must take seriously. By enhancing safety awareness, implementing safety measures, strengthening teamwork, and continuously improving safety performance, the level of safety production can be effectively enhanced, ensuring the safety of both individuals and the enterprise.

First of all, enhancing safety awareness is the foundation. We should learn safety knowledge by participating in safety training, reading safety manuals, and paying attention to safety news, so as to continuously improve our safety knowledge reserve and our ability to identify safety risks. At the same time, we must strictly abide by safety regulations, put an end to illegal operations, and actively participate in the construction of public safety culture. We should internalize the content of safety awareness in our minds and externalize it in our actions through forms such as publicizing slogans and sharing safety experiences.

Secondly, implementing safety measures is the most critical. In daily work, we should always pay attention to potential safety hazards around us and regularly inspect equipment and facilities to ensure they are in good operating condition. When operating, we must strictly follow the prescribed operating procedures, not be hasty, not take shortcuts, and not omit any necessary links. We should be familiar with the content of emergency plans, master basic emergency capabilities, and strengthen emergency response capabilities so that we can respond and deal with emergencies quickly.

Thirdly, strengthening team collaboration is also an important link. We should establish a good communication mechanism, share safety information, safety experience, and exchange safety work experiences in a timely manner, and remind of safety risks. When facing safety challenges, we should work together to ensure the overall safety and stability of the work environment.

Finally, continuously improving safety performance is the guarantee for sustainable development. This includes seriously learning safety knowledge, strictly abiding by safety operating procedures, doing a good job in personal safety protection measures, actively participating in safety management activities, continuously paying attention to safety dynamics, and being good at summarizing experience. Through these measures, we can continuously improve the performance of individuals and enterprises and contribute our own strength to the stable development of enterprises.

In short, how to do a good job in safety work at personal posts is a systematic project, which requires starting from many aspects, continuously improving safety awareness and skills, implementing safety measures, strengthening team collaboration, and continuously improving safety performance, so as to achieve the common safety development of individuals and enterprises.

——Production Department · Zhang Junmin

In the carbon molecular production field, tar, as a key raw material, faces great challenges in long-distance transportation in winter due to poor low-temperature fluidity. Traditional electric heat tracing is commonly used, but its energy consumption and safety shortcomings are obvious. After in-depth exploration, our company independently designed a hot water tracing system, which provides an excellent solution to the problem of tar transportation.

This hot water tracing system is an efficient, energy-saving, and safe choice for long-distance tar transportation. By utilizing the factory's heat source and with the optimized design of aluminum pipes and thermal insulation sleeves, it overcomes the problem of difficult low-temperature transportation of tar and has achieved remarkable results in terms of energy and safety. This achievement helps enterprises gain a competitive advantage and also provides valuable references for peers, promoting industrial technological progress and sustainable development. In the future, our company will continue to innovate, overcome more industrial technical difficulties, and make unremitting efforts for the progress of the industry.

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Safety is the cornerstone of a company's success and failure, the lifeline of an enterprise, and the prerequisite for benefits. Safety production is crucial to the lives of employees and the safety of corporate property, as well as to social stability. Therefore, as a grassroots safety production manager, it is essential to strengthen the learning of safety knowledge and professional skills, enhance one's own safety management awareness, and improve personal safety management capabilities.

Seriously implement the principle of 'safety first and prevention foremost'. In daily management, the safety state of objects is managed by improving people's safety awareness. Therefore, regular safety training and 'safety learning' for personnel are particularly important. Only by fundamentally enhancing people's safety awareness and their ability to prevent and respond to risks, and by strictly adhering to various rules and regulations, can we better manage the safety state of objects, control emergencies, and ensure that objects function normally and safely. For the management of the safety state of objects, effective maintenance, repair, and management of equipment can prevent it from being in a sub-healthy state. Personnel operating in accordance with regulations and the good condition of equipment ensure the normal operation of equipment, improve equipment utilization, guarantee normal production operations, and eliminate safety accidents.

Improving one's own quality is not only a requirement of safety production management but also a need for enterprise development. In team performance assessments, one's safety knowledge, safety technical level, and professional ability should be combined to equip oneself with high skills, strong analytical decision-making, and emergency handling capabilities. This facilitates a shift in employees' safety awareness from 'safety is imposed on me' to 'I want safety' and then to 'I know how to be safe.'

In summary, the transition from 'safety is imposed on me' to 'I know how to be safe' requires a significant shift in the mindset, psychology, and behavior of the employees, who are the main actors in safety production. Achieving this shift relies on extensive efforts in publicity, education, inspection, supervision, rewards, and penalties. By leveraging the external motivation of 'safety is imposed on me' to promote this transformation, our safety production management will undoubtedly reach new heights and levels.

This year marks the 23rd National Safety Production Month, with the theme 'Everyone Talks Safety, Everyone Knows Emergency Response—Clear Life Channels.' On June 5, the High-Tech Zone Management Committee and Niutoushan Government launched the Safety Production Month activities, organizing various forms of safety training and educational activities. During the Safety Production Month, the company also organized diverse safety production promotions, training, and emergency drills, reflecting the priority placed on safety production by government and enterprise departments at all levels. Only with safe production can enterprises develop healthily, society remain stable, and people's lives become increasingly happy and joyful!

——Comprehensive Department: Zhang Qixiang

1.Molecular sieving performance

Molecular sieves feature an extremely uniform pore size distribution. Only substances with molecular diameters smaller than the pore size can enter the internal cavities of the molecular sieve crystals. For instance, 3A molecular sieves have a pore size of approximately 0.3 nanometers, allowing only water molecules (about 0.27 nanometers in diameter) to pass through while repelling larger molecules (such as propane, around 0.43 nanometers). 5A molecular sieves, with a pore size of roughly 0.5 nanometers, are used for separating oxygen (0.34 nanometers) and nitrogen (0.36 nanometers). This precise "molecular screening" capability makes them key materials for separation and purification processes.

2.Adsorption performance

Even if molecules are smaller than the pore size, molecular sieves preferentially adsorb polar molecules (such as water and carbon dioxide) and unsaturated molecules (such as alkenes) through van der Waals forces or hydrogen bonds on the pore surface. This further enhances sieving precision. For example, nitrogen production using carbon molecular sieves achieves efficient nitrogen separation by preferentially adsorbing oxygen (which has slightly stronger polarity).

3.Catalytic performance

The pore structure of molecular sieves serves as "microreactors" for chemical reactions. The acidic sites on their surface (generated by the charge balance between the negative charge of aluminum-oxygen tetrahedra and cations) can catalyze carbocation-type reactions. For instance, Y-type molecular sieves, as petroleum cracking catalysts, can crack heavy oil into light fuels like gasoline. They are currently one of the most widely used catalysts in the petroleum refining industry.

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3A molecular sieve is a type of high-performance microporous adsorbent material with potassium-exchanged A-type zeolite as the core component. Its pore size is precisely controlled at 3Å (0.3 nanometers). Relying on its unique molecular sieving effect and excellent adsorption capacity, it has become a core material in the deep drying, purification, and separation processes of gases and liquids, widely adapting to the harsh working conditions of various industries.

Core Product Performance

1.Precise Selective Adsorption: The pore size is exclusively adapted for water molecules (kinetic diameter: 2.8Å) to enter the adsorption channels, enabling efficient interception of large molecules including CO₂, NH₃, and organic hydrocarbons, thus achieving targeted deep dehydration of the target system. The product boasts a static water adsorption capacity of up to 20%–22%, making it especially suitable for drying scenarios of humidity-sensitive media.

2.Excellent Environmental Resistance: The crystalline structure has superior thermal stability, maintaining structural integrity even under a high-temperature environment of 350℃. It also possesses good chemical inertness, resisting corrosion from strong polar solvents and acidic gases such as H₂S, and can operate stably under harsh working conditions to ensure long-term service reliability.

3.High-Efficiency Regeneration and Reusability: After adsorption saturation, the adsorption performance can be quickly restored through heating desorption at 200–350℃ or vacuum desorption, with extremely low loss during the regeneration process. After multiple regeneration cycles, the adsorption efficiency can still be maintained above 90%, significantly reducing the operational costs of industrial production.

4.Safety, Environmental Protection and Compliance: The product itself is non-toxic and free of pollutant emissions. It has obtained FDA food contact safety certification and complies with the EU RoHS environmental directive, allowing safe application in food, pharmaceutical, electronic and other fields with stringent requirements for purity and safety.

Typical Application Scenarios

1.Industrial Gas Drying: Conduct deep dehydration of cracked gas and natural gas to avoid pipeline ice blockage and equipment corrosion issues.

2.Petrochemical Industry: Realize dehydration of hydrocarbons such as liquefied petroleum gas (LPG) and olefins to prevent hydrate formation from affecting production.

3.Refrigeration Systems: Perform drying treatment on refrigerants such as R134a to improve the energy efficiency and operational stability of refrigeration systems.

4.Electronic Packaging: Purify inert gases such as nitrogen and argon to construct a clean environment required for semiconductor production.

5.Pharmaceutical Preparations: Complete solvent dehydration and drug packaging moisture control to effectively extend the shelf life of drugs.

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The Phase III expansion project of Shanli Technology is in full swing, which is not only a simple capacity enhancement project, but also an important leap in the company's development history. This project represents Shanli Technology's firm determination in technological innovation and industrial upgrading, and also symbolizes the company's relentless pursuit of high quality and high efficiency on the road to development.

In terms of technological innovation, Shanli Technology has always been at the forefront of the industry. During this expansion project, the company's leadership has demonstrated profound insight and swift adoption of new processes and technologies. Countless technical improvement meetings, personally chaired by the Chairman, involved meticulous refinement of project details. 

While pursuing technological innovation, the company places great emphasis on safety in production. Safety is the cornerstone of the company's development and its commitment to its employees, their families, and society. 

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1.Stable adsorption performance.

The carbon molecular sieve of a nitrogen generator must have excellent selective adsorption capacity, and its adsorption performance and selectivity must not undergo significant changes during long-term operation.

2.Uniform quality and consistent particle size.

The carbon molecular sieve of a nitrogen generator needs to ensure uniform particle size, so as to guarantee the uniform transmission of gas molecules in the molecular sieve channels and avoid phenomena such as "streamline effect" and "hot spot effect".

3.Large specific surface area and uniform pore size distribution.

The carbon molecular sieve of a nitrogen generator has a large specific surface area and reasonable pore size distribution, so as to increase adsorption capacity and improve adsorption rate.

4.Strong heat resistance and chemical resistance.

The carbon molecular sieve of a nitrogen generator needs to have certain heat resistance and chemical resistance, and be able to be used for a long time in environments with high temperature, high pressure and harmful gases.

5.Low cost and high stability.

The carbon molecular sieve of a nitrogen generator needs to be relatively low in price, high in durability and have long-term stability to meet the requirements of industrial applications.

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In the operation and development process of an enterprise, there are five mirrors that are like guiding lighthouses, reflecting the state of the enterprise from different angles, helping the enterprise to understand itself, adjust its direction, and make continuous progress. These five mirrors are the market mirror, customer mirror, employee mirror, competition mirror, and society mirror.

The market mirror reflects the overall environment in which an enterprise operates. It can reflect the fluctuations of the economic cycle. During periods of economic prosperity, market demand is booming，and enterprises may have more opportunities to expand production and investment. In times of economic recession, enterprises need to see the situation clearly from the market mirror, contract the front, and carry out refined management to cope with the market.

The customer mirror is the enterprise's most direct source of feedback. Through the customer mirror, enterprises can see the advantages and disadvantages of products or services. Enterprises need to adjust the functions and quality of products in a timely manner according to customer feedback, improve service attitude and process. Successful enterprises often tend to listen to the voice of customers and integrate customer needs into product research and development.

The employee mirror is a mirror within the enterprise. Employees are an important part of the enterprise, and they have a profound perception of the enterprise's culture, management, and development. From the employee mirror, enterprises with vitality often have enterprising and high-quality employees. Enterprises can find the advantages and disadvantages in human resource management from a positive perspective and then create an environment that is more conducive to employee growth and the exertion of potential.

The competition mirror enables enterprises to clearly recognize their position in the industry. By comparing with competitors' products, prices, market shares, and marketing strategies, enterprises can find their differentiated competitive advantages and also discover their own shortcomings. The competition mirror urges enterprises to constantly learn from the strengths of their competitors, make up for their own weaknesses, and thus gain an invincible position in the competition.

The society mirror reflects the enterprise's social responsibility and image. It reflects whether the enterprise abides by laws and regulations, pays attention to environmental protection, and actively participates in public welfare undertakings. Enterprises should actively review themselves from the society mirror, assume their due social responsibilities, and win social respect and support with a good social image.

These five mirrors of the enterprise—the market mirror, customer mirror, employee mirror, competition mirror, and society mirror—each provide a viewing perspective from different dimensions for the enterprise. Only by making good use of these five mirrors and constantly reflecting on and adjusting itself can an enterprise maintain healthy and stable development in the complex and changeable business environment and achieve sustainable prosperity.

——Production Department · Ma Le