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The enamel desulfurization plate is similar to a corrugated flat plate, and its quality and thickness are not large compared with the water heater. In order to increase the loading capacity of the firing furnace, multiple pieces are hung on one hanger for firing, and each hanger generally hangs 4 to 5 pieces. The length of the product is long and the width is small, so the turning radius in the furnace is required to be large, but the small width in the parallel section of the firing chamber is beneficial to energy saving. The hanging pitch determines the turning radius. If the two cannot be approximately equal, the turning radius must be satisfied. At this time, the furnace shape is similar to a scoop shape (or polygon) on the U-shape basis.
The desulfurization board adopts one-time dipping and enamelling. After being glazed, it is directly hung on the firing chain and enters the heat exchange belt for drying. In particularly cold regions, the length of the heat exchange belt can be extended or the electric drying power can be increased. This kind of firing furnace has simple process and high production efficiency. According to the product shape and hourly heating capacity, the current power of the kiln can be as small as 375kW and as large as 1100kW.
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What are the advantages of a gas enamel firing furnace?
Gas radiant tube enamel firing furnace gas burns liquefied petroleum gas, etc. At present, the gas fuel of gas enamel firing furnace on the market is mainly natural gas and liquefied petroleum gas. The main components of the fuel are methane, propane, butane, and also contain a small amount of ethylene, propylene, butylene, etc.; as long as the fuel is fully burned, the gas enamel firing furnace will have little pollution to the environment, and the waste heat can be recycled. Higher, easy to realize automatic control. Due to the relatively sufficient supply of gas fuel, relatively low energy prices, high calorific value, and relatively low comprehensive cost of energy consumption, gas-fired enamel furnaces are widely used by major enamel manufacturers. As a clean energy source, gaseous fuel has been widely used in various industries. Gas enamel firing furnace, as an enamel firing furnace powered by gas fuel, has many advantages: ①Energy saving and low energy consumption. Due to the sufficient supply of gas fuel energy, high calorific value of fuel and low unit price, the overall energy cost of gas enamel firing furnace is relatively low. ② High utilization rate of heat energy. The gas is completely burned, and the tail gas produced has a lot of heat. As long as the waste heat of the tail gas is used well, the heat energy can be fully utilized, and the utilization rate of heat energy can be maximized. ③ The temperature in the furnace is uniform. As long as the burners can be arranged reasonably, the uniformity of the furnace temperature can be fully guaranteed. ④ Little pollution. As long as the fuel is fully combusted, the environmental pollution is small. Because the electric power of the gas enamel firing furnace is small, it will not have an impact on the transformer current; but the gas fuel is prone to insufficient combustion due to insufficient oxygen supply or gas leakage due to various reasons. Therefore, the gas enamel firing furnace puts forward high requirements for the safety control of the equipment.
How To Judge The Firing of Enamel Products?
The firing of enamel products is a very important part of the enamel process. During the firing process, the various firing technical parameters and operating points that the operators of the enamel factory must strictly follow, and strictly follow the reasonable process production and implementation, is conducive to improving the enamel production. product quality. So how to judge the time and firing effect of enamel products? The firing temperature of enamel products is set with a furnace temperature gauge, and the firing time is controlled by a stopwatch. After the firing, relevant instruments and equipment are used to detect the gloss or adhesion strength of enamel products to judge the firing quality of enamel products. If it is fired in a batch muffle furnace, it can generally be judged by visual inspection. Put the dry powder blank into the furnace, under the contrast of the bright red furnace wall, the powder blank shows a dark color, and when the temperature rises, it will turn into a light and color similar to the furnace wall, indicating that the temperature of the blank at this time is the same as the furnace wall. The temperature is close, but the internal temperature of the iron billet may not have reached it, and it will take a while to be fired. As for how long it takes to burn, it depends on the experience of the operator, which is related to the wall thickness and material of the enamel billet. If it is a continuous firing furnace, it is adjusted by setting the furnace temperature table and the linear speed of the transmission chain (or the speed of the driving wheel), and the temperature and speed are the product's adhesion, porcelain surface gloss and smoothness by the on-site technical supervisor. The casting adjustment is determined after multiple inspections such as the degree and so on.
What are the causes and solutions of the enamel orange peel defect?
The orange peel-like irregular wrinkles on the surface of the porcelain enamel layer are called orange peel wrinkles (orange peel wrinkles). Orange peel wrinkles are a kind of defects on the enamel surface, which directly affect the appearance quality of enamel products. Smooth and smooth, no defects such as pores, de-porcelain, line spots and so on. There are many reasons for orange peel wrinkles, generally enamel frit or enamel slurry. If your product has orange peel wrinkles, it can be analyzed from the following reasons: The enamel frit used has high surface tension and high viscosity; The enamel frit slurry is stored for too long, and the coarse grains sink; The enamel slurry particles are too coarse and the enamel is too thick; The temperature of the enamel firing furnace is too high; Uneven dissolution during firing; Excessive air pressure during enamel spraying. When encountering orange peel wrinkles, it should be noted that the enamel slurry should not be stored for too long and the furnace temperature for firing the enamel cover coat should not be too high. If it is daily enamel, pay attention to the lower surface tension in the choice of cover coat.
What Should I Do If Enamel Surface Is Boiling Or Grit Appears After Ground Coat Is Fired?
Enamel boiling refers to the accumulation of bubbles, pinholes, black spots, focal points, etc. on the surface of the cover coat layer due to excessive boiling of the ground coat layer during the firing of the ground coat, and the porcelain surface presents a boiling state of obvious loss of light. , usually caused by 5 reasons. The ground coat is too thick and the temperature of the firing furnace is too high. The enamel should not be too thick, and the furnace temperature for firing needs to be adjusted and controlled; Excessive amount of electrolyte added (for "electrolyte", please refer to the article "Application of Sodium Nitrite in Enamel"); The ground coat is not fully melted, and the ground coat should be fully melted; Air leakage from the firing kiln, high humidity or reducing atmosphere. Enamel manufacturers need to overhaul the kiln in time to maintain an oxidizing atmosphere in the kiln; Due to the temperature in summer, the temperature when grinding the ground coat is too high. When grinding the enamel slurry in summer, it can be cooled with water. To prevent boiling, potassium chlorate can be added to a small amount of general organic matter. Particle defects on the enamel surface, as the name suggests, are rough particles that can be seen on the enamel surface after the ground coat is fired. You can refer to the following 3 reasons: After grinding, if the sieving is not completely cleaned, or there are broken balls mixed in, the enamel slurry must be sieved strictly; During the aging or storage process of the enamel slurry, garbage sand is mixed in, and the enamel slurry must be kept clean; Enamel manufacturers need to overhaul the firing furnace due to slag loss from the firing kiln.
What is a low-temperature enamel coating?
For enamel manufacturers, temperature control has always been a key factor affecting product quality and production costs. Recently, Nolifrit launched a low-temperature, one-coat enamel coating designed specifically for porcelain enamel stove grates, successfully breaking the limitations of traditional high-temperature firing and bringing new production solutions to porcelain enamel manufacturers. This low-temperature enamel coating can be fired at 800℃, significantly reducing energy consumption and production costs compared to traditional high-temperature firing processes. At the same time, it can achieve a porcelain surface gloss of about 100, making the surface of the enamel stove grill smoother, more beautiful, and highly decorative and practical. More importantly, low-temperature firing does not compromise performance. On the contrary, this enamel coating maintains excellent gloss while demonstrating outstanding durability and corrosion resistance. It can maintain stable performance in the face of daily wear and high-temperature environments, ensuring the service life and safety of the enamel stove grill. For enamel product factories, the launch of this low-temperature enamel coating is undoubtedly a major benefit. Compared to traditional high-temperature enamel coating, low-temperature enamel coating reduces furnace energy consumption and reduces energy consumption during production, thus reducing production costs. Especially for new entrants to the enamel industry, the firing process of low-temperature enamel coating is simpler, reducing production processes. Furthermore, due to the low heat resistance requirements of low-temperature enamel coating for furnaces, enamel product factories do not need to invest heavily in high-performance furnaces, reducing equipment investment costs.
What are gas furnace energy saving ways for enamel manufacturers?
Coal-fired furnaces have been used for the longest time and have the largest number in the enamel industry. Due to serious pollution, they have been gradually phased out and replaced by electric furnaces, gas furnaces and oil furnaces that use clean energy. After years of introduction, digestion and absorption, Thermal efficiency is constantly improving. Today, NOLIFRIT focuses on the energy saving methods of enamel gas furnaces to help enamel manufacturers optimize production efficiency and save costs: The radiant tube furnace should pay attention to the layout, installation position and height of the radiant tube, the maximum angle coefficient that is conducive to radiation, and the uniform radiation heat transfer to the product, so that the upper and lower temperature differences tend to be consistent; Increase the length of the preheating zone, use high-temperature flue gas to increase the temperature of enamel products entering the furnace, and improve thermal efficiency to save energy; Using high-quality thermal insulation materials, the radiant tube furnace can use the lining of all fiber cotton, and the muffle furnace can use the composite furnace wall; Spray high-temperature energy-saving paint on the inner wall of the firing chamber to increase the blackness of the inner wall. According to the principle of thermal radiation, the furnace wall with large blackness absorbs more heat, the temperature is easy to increase, and the radiation and effective radiation of the furnace wall itself increase; Improve the tightness of the furnace body, especially in the muffle furnace. The loose furnace body not only wastes energy, but also brings hidden dangers to production safety; The automatic control system of the fuel proportional valve should be used to control the excess air coefficient, so as to avoid wasting fuel and losing heat; Use the waste heat of flue gas to increase the temperature of combustion air through the heat exchanger. Experience has shown that when the air is preheated to 200°C, the excess air volume can be reduced by 12% to 13%, the furnace temperature is significantly increased, and the emission of harmful gases is reduced, which is conducive to environmental protection.
What are the necessary equipments required for enamel production?
Enamel, also known as porcelain enamel, as a composite material of metal and glass inorganic high temperature firing, has the advantages of acid resistance, corrosion resistance, high temperature resistance, wear resistance (wear-resistant than coating materials), etc. It has been widely used in daily life, home appliances In the fields of , petroleum, chemical, construction and public facilities, there are many other fields that can be explored and developed. As we all know, the enamel industry is very promising. So, if you are going to open a new enamel factory, what basic equipment do you need to prepare? Pretreatment equipment Pretreatment is to remove grease, rust, oxides, etc. on the surface of the metal body, so as to obtain the surface quality that meets the requirements of enameling and improve product quality. Pretreatment requires the following basic equipment: cleaning tanks, cleaning baskets, trucks, partition nets and supports, heating systems (such as steam boilers), cranes, time controllers, pretreatment liquid inspection agents; Ball mill Generally, factories purchase enamel frit directly from enamel frit suppliers, and then apply enamel by grinding enamel powder or mixing with grinding additives, solvents, etc., and crushing into enamel slurry. Therefore, ball mills and enamel slurry storage equipment are required: Large grinder: 1000kg, 500kg, 300kg, 100~150kg, fast and small 500g ball mill (specific equipment quantity and equipment specifications are determined according to the scale or production capacity of the factory), high alumina balls for grinding: 2.0”, 1.5”, 1.25”, Electric sieve, reserve enamel slurry barrel, general sieve: 40, 60, 80, 100 mesh and various weighing tools. Enameling equipment For a general enamel factory, the glazing process requires the following equipment: Spray gun: 1.2~1.8mm, spray bucket, enamel bucket, various clamps, air compressor above 50HO, air storage and freezing filtration equipment, uranium spray table, vacuuming equipment. Drying equipment Conveyor belt (5T, large or medium), hanging basket, hook, drying furnace, if it is a factory with small production capacity, an electric oven can be used. Firing furnace Stainless steel 310 baskets, various hooks and spreaders. six. Testing equipment Film thickness gauge, magnifying glass (150x), impact tester, laboratory equipment and small firing furnace. Hydropower facilities: electrical equipment and piping works, transportation equipment: pull trucks, fork vehicles, etc.; environmental protection and wastewater treatment equipment, various raw materials in the initial stage, etc.
What is the difference between a furnace and a kiln?
A furnace is used for heating a space or building by producing hot air or steam, while a kiln is a type of oven or furnace used for firing ceramics or pottery to a specific temperature to harden or dry them. Furnaces are typically used for heating homes or buildings, while kilns are specifically designed for firing clay products.
How To Solve Enamel Chipping-Off And Fish-Scale？?
Enamel chipping-off and fish-scale are common defects of enamel products, which refer to the internal and external stress on the porcelain surface after the enamel products are fired. If the enamel finished product is de-ceramic, you can start to analyze it from the following reasons. (1) De-Porcelain: The enamel falls off Cause Analysis: Devitrification due to severe cracks; 2. The ground coat is too thin on the sides, handles, feet, and bottom, and the firing temperature is high; 3. The cover coat is too thick and the firing is insufficient. Solution: Appropriately increase the curvature radius of the side, handle, foot and bottom; 2. Adjust the bulk density of the enamel slurry to avoid local coating too thin or too thick. (2) Fish scale: The porcelain surface is scaly and loses the porcelain (some appear after firing, and some appear in a week or more) Reason analysis: 1. The content of C.S.P.Si in the thin steel plate is high; 2. The acid concentration is high, and the pickling time is long; 3. The clay is of poor quality and there are many impurities; 4. The furnace temperature is high, and the ground coat is partially scorched. Solution: 1. Choose a high-quality steel plate suitable for enamel; 2. The acid concentration should not be too high. The pickling time should be appropriate; 3. Choose high-quality clay; 4. Use hard and soft mixed primer. Grind and add about 10% calcined quartz, and the ground coat firing furnace temperature should not be too high to avoid local scorching.
What is the color matching in ball milling of enamel frit?
Enamel color matching is a technical work that needs to be done by professional technicians with the help of colorimeters. It not only needs to master the relevant knowledge of enamel pigment, enamel frit and enamel firing process, but also establishes a database of color and chromaticity values of various pigments in the basic enamel. To adjust the color of enamel, first determine which basic enamel to use according to the lightness value of the color sample, and then search and select the pigment with a similar chromaticity value in the database built according to the chromaticity value of the color sample. After repeated trial matching, proofing, comparison and adjustment, the final enamel slurry ratio, enamelling, firing, porcelain layer thickness and other related process parameters are recorded in detail as a basis for guiding production operations. The variety of enamel pigments is quite limited, and most enamel colors are formulated from two or more enamel pigments. Enamel production factories and enamel manufacturers can purchase or customize colors from enamel pigment suppliers according to their own needs. Common colors include light pink, golden yellow, lemon yellow, sky blue, fruit green, dark gray, etc.
How Should Enamel Factories Choose Furnace Based on Products?
In the intense market competition, enhancing professional knowledge is crucial for enterprises to win customer trust and expand their business reach. On March 7,Nolifrit conducted a highly valuable training session—a furnace knowledge seminar presented by experts from an enamel furnace factory, providing a "booster shot" for the business abilities of export trade salesmen. The training began with a comprehensive introduction to the fundamental framework of furnace knowledge. Starting with the critical factor of product material—steel & cast iron—the trainers guided the salesmen to consider how to match materials and furnace types based on the actual needs of customers. Next, regarding product dimensions, weight, and types, the trainers emphasized that understanding the customer's expected production volume and maximum product characteristics is key to developing a suitable furnace solution. It is particularly important to accurately grasp the specific dimensions, weight, and type of products in order to select the most suitable furnace. The process requirements of Enamel Factories also influence furnace selection. Factors such as the number of enamel layers, whether to use electrostatic or wet methods, and whether to apply porcelain through dipping or spraying determine whether drying is necessary. Choosing the type of energy source is equally critical. By comparing the advantages and disadvantages of electric heating versus natural gas heating.The trainers pointed out that electric heating allows for precise temperature control but incurs higher long-term costs, while natural gas requires substantial initial investment but is more economical for long-term use. Additionally, gas furnaces are better suited for large products, while electric furnaces are preferred for smaller items. This segment deepened participants' understanding of energy efficiency and cost control. Regarding production requirements, the lecturer stressed the need to clarify the customer's production count per hour and provided examples of how to calculate the output of composite products, such as "1 set of pot + lid = 1 nos," ensuring that the plan meets actual needs. In terms of furnace type selection, the application scenarios for hanging furnaces and roller furnaces vary: the former is primarily used for high-temperature rapid firing of steel enamel products, such as BBQ grills, while the latter is more suitable for low-temperature slow firing of cast iron pots. This distinction aids in providing highly customized furnace solutions for different customers.
Is there a homophone for kill?
Yes, a homophone for "kill" is "kiln," which is a type of furnace or oven used for firing ceramics.
