Its technical features are as follows:
The cold air cupola is a traditional cupola produced by our company according to the national mechanical standards, which is used for single-shift production. In terms of furnace structure, configuration, parameter selection, etc., we have absorbed foreign advanced technology and our company's patented technology to ensure the excellent performance of the furnace. Performance indicators exceed industry standards. The cold air cupola adopts two rows of tuyeres with large spacing to supply air at room temperature, and the new pressure equalizing bellows ensures uniform tuyere pressure, uniform inlet air and stable furnace condition. The cold air furnace has a simple structure, and is suitable for medium-batch production workshops. High-grade castings can be produced by double melting of heat preservation electric furnace.
Li Qing's cold air cupola has thousands of users in China, and some large enterprises, such as Shifeng Group, Shenji Group and Weichai Power Group, all use more than 5 cold air cupolas of our company, and the product quality has been recognized by the majority of users.
Self-heating blast cupola
Self-heating cupola is a temperature difference cupola developed by Qingdao Li Qing Environmental Protection Equipment Co., Ltd. on 1988. After years of manufacturing debugging experience and user feedback, the design has been optimized and improved. After adjusting the design, the equipment runs more stably and reliably, which improves the overall benefit of the foundry and adapts to the furnace type required by domestic foundry. The cupola with self-heating air supply is the only high-quality equipment with self-heating exchange air supply, high technical and economic index, excellent performance, low melting loss, low emission, less pollution, simple operation, long service life, less investment and quick effect. It is the first choice for producing high-quality, high-grade thin-walled castings and high-grade cast iron exported from Germany.
Technical features:
1, the heat exchanger adopts patented technology, and the lower flange adopts stamped flange, which effectively prolongs the service life of the heat exchanger. Multi-speed load test shall be carried out before the heat exchanger leaves the factory to ensure that the factory qualification rate is 100%.
2. The tuyere is externally arranged to prevent iron slag from pouring into the bellows under unexpected circumstances.
3. Save coke 10%-20% compared with common cupola.
Two-shift water-cooled cupola with thin lining
The design scheme of two-shift water-cooled cupola with thin lining is a kind of cupola developed by Qingdao Li Qing Environmental Protection Equipment Co., Ltd. in 2000 according to the production and manufacturing standards of cupola in China's former Ministry of Machinery and Electricity, fully absorbing the successful technology of German and Japanese advanced cupola types, and combining the mature experience of our company in manufacturing and debugging long-term water-cooled cupola this year. After years of promotion, more than 70 users at home and abroad have purchased and used nearly 100 sets of 5- 15t/h water-cooled two-shift cupola, which is an excellent furnace type for large and medium-sized casting enterprises to smelt for a long time, improve casting quality and reduce casting cost. Advanced technology, leading in China, passed the scientific appraisal of Qingdao Science and Technology Bureau.
Long-life water-cooled cupola
Long-life water-cooled cupola is a new type of cupola developed and manufactured by Qingdao Li Qing Environmental Protection Equipment Co., Ltd. in 1990, and declared a new national patent in 1993, integrating some advantages of external hot air cupola. After nearly 20 years of promotion, more than 50 domestic and foreign customers have purchased and used the 5- 15t/h water-cooled long-life cupola made in Li Qing. This furnace type is an excellent furnace type for continuous smelting, improving casting quality and reducing casting cost in large casting enterprises.
Product technical features:
1, the thickness of slag layer on furnace wall is uniform and stable. The melting zone path is unchanged, the furnace condition is stable, and it can be continuously melted for more than 30 days.
2. The oxidation atmosphere in the furnace is weak and the element loss is less.
3. The workload of road construction is small, the amount of refractory is small, and the amount of slag only accounts for 1%-3% of the amount of iron water, so the heat loss is small.
4. The copper water-cooled tuyere is well made and has a long service life.
Brief introduction of RC-W-N external hot air water-cooled cupola system without furnace lining
Qingdao Li Qing Environmental Protection Equipment Co., Ltd. adopts the advanced structure of foreign equipment and combines the situation of raw materials in China to develop a series of RC-W-N external hot air cupola products suitable for the national conditions. Under the condition of using China raw materials, it overcomes the problems existing in the use of imported equipment, and has the properties of increasing the temperature of molten iron, reducing carbon monoxide emission, reducing coke consumption, reducing burning loss, stabilizing the chemical composition of molten iron, improving the quality rate of castings, producing high-grade and high-quality castings and reducing production costs. It has reached the international level of cupola melting and laid a solid technical foundation for the quality of machinery and castings in China to meet the competition after China's entry into WTO.
Product structure features:
1. External heating air supply: adopt the hot air structure of preheating air (causing waste gas combustion) by external heating, adopt high-quality optimized hot air technology, make full use of chemical and physical heat of cupola waste gas, and adopt advanced technology for heat exchanger.
2. Water-cooling structure: the furnace shell is cooled by evaporation or conventional rain, and it is operated without furnace lining or thin furnace lining.
3. Plug-in tuyere: copper plug-in tuyere is adopted.
Main economic and technical indicators:
Tapping temperature: > 1500℃
Gas supply temperature: 400C-600C.
Coke consumption ratio: 1: 8- 1: 10.
The chemical composition of molten iron is stable, the carburizing, siliconizing and desulfurization effects are remarkable, the composition of molten iron is stable, and the Feo content in slag is reduced. Compared with the common cupola, the qualified rate of castings can be increased by 20-30%, the continuous production can be more than 30 days, and the productivity is 5-50 tons/hour.
The birth of steel slag furnace system
According to the announcement recommended by the three ministries and commissions of the country, and according to the application characteristics of foreign hot blast cupola, aiming at the application of low-quality burden, the company developed an overhead combustion outdoor hot blast cupola, which was successfully used in Zaozhuang Foundry and Benxi Iron and Steel Plant Industrial Development Company to smelt iron filings and steelmaking slag! In 2006, it applied for a national patent and was recognized as a national high-tech product and a national high-tech enterprise!