College: College of Education
Category: building materials 060 1
Name: Tong Jianbin
Student number: 20062160011.
Instructor: Ying Debiao Qiu Qiong
Practice location: Ningbo kehuan new building materials co., ltd.
Internship time: July 2008 16-July 26, 2008.
1. Internship goal
The purpose of production practice is to make students understand the production process, production equipment and production organization of the factory, master the concrete production process of cement raw materials and the formation process of cement clinker, master the working principles and functions of various production equipment, lay a perceptual knowledge for subsequent professional courses, understand the society, cultivate the ability of independent thinking and work, and collect necessary information and data for future graduation design.
2. Company profile
Ningbo kehuan new building materials co., ltd (formerly Ningbo shunjiang cement co., ltd), located in the northern suburb of Yuyao city, Zhejiang province, was founded in 1975. Up to now, it is a large-scale cement enterprise covering an area of more than 400 mu and the backbone enterprise of Ningbo Fidelity Co., Ltd., a listed company. The company has 562 employees and fixed assets of 638 million yuan. It has passed ISO900 1 quality management system certification and ISO 1400 1 environmental management system certification, and won the title of Zhejiang famous trademark and Ningbo famous trademark. It is an advanced energy-saving enterprise in Zhejiang Province and one of the top ten benchmark enterprises for energy conservation and emission reduction in Zhejiang Province. Its "Shunjiang" brand cement is a national inspection-free product.
2. 1 corporate culture
Enterprise spirit: high efficiency, pragmatism, hard work and transcendence.
Quality policy: optimize procurement, optimize operation and provide quality ex-factory service.
2.2 Enterprise advantages
Production scale-The company newly built a dry-process cement production line with a design scale of 2,500 t/d and an actual production capacity of 3,000 t/d, which is the second batch of "double high and one excellent" projects in China. At present, it is the only new dry cement production line in Ningbo, with an annual output of 2 million tons of cement grinding and 400,000 tons of slag powder. The main sales place is Ningbo.
Product category-
■ General purpose cement: ordinary portland cement, composite portland cement, portland cement clinker, etc.
■ Special cement: marine cement, road cement, pipe pile cement, low alkali cement, emergency repair cement, medium and low heat cement, grouting cement, etc.
■ New building materials: slag powder and composite cementitious materials.
Main product features-
■ Ordinary cement: stable performance, small fluctuation, high strength, good workability and strong adaptability to additives.
■ Marine cement: high chloride ion penetration resistance, low hydration heat, impermeability, frost resistance and slight expansion.
■ Pipe pile cement: autoclaved, the strength of pipe pile reaches above C80, the bending resistance is good, the construction performance is excellent, the production cycle of pipe pile is shortened, and the production cost of pipe pile is greatly reduced.
■ High-performance concrete made of high-performance slag powder and ordinary cement has high fluidity, high strength, high wear resistance, high durability and excellent resistance to chloride ion penetration.
Cleaner production-The company is the first batch of comprehensive resource utilization enterprises in Ningbo and the first batch of cleaner production audit pilot enterprises in Zhejiang Province. In order to reduce pollutants from the source, all raw material storage and transportation equipment on the production line are closed. According to the monitoring by the environmental protection department, the emission concentration of waste gas under standard temperature and pressure is below 20mg/m3, which is far lower than the national standard 100mg/m3, and unorganized emission is effectively controlled. In the process of cement production, clean production is realized, and solid waste resources, including fly ash, slag, cinder and coal gangue, are actively utilized, with an annual profit of nearly 6,543,800 tons. The company has also been awarded the honorary titles of Zhejiang Green Enterprise and Zhejiang Advanced Typical Enterprise in Pollution Control.
Circular economy-The company is in a leading position in solid waste treatment in China. With the support of Ningbo Environmental Protection Department, the company cooperated with China Institute of Building Materials, Tsinghua University and other relevant units to carry out the experimental research on the project of "Harmless Comprehensive Utilization of Industrial Sludge Containing Heavy Metals", so that the industrial sludge from electroplating and stainless steel industries can be disposed at high temperature in the cement rotary kiln without causing secondary pollution to the environment. It is the only enterprise in Ningbo that uses a new dry cement kiln to treat industrial waste. It has become an important link for Ningbo to build an eco-city to transform the enterprise from a pure cement production enterprise into a solid waste (including hazardous solid waste) disposal unit. At present, it has been selected as a demonstration cement enterprise of Sino-Norwegian cooperation project "Environmentally sound management of hazardous waste and industrial waste disposal in China cement kiln".
Energy saving and consumption reduction—
■ In 2006, the company was listed by the National Development and Reform Commission as one of the "Energy Saving Thousand Talents Action" enterprises in China.
■ The first pure low-temperature waste heat power station in Ningbo was built by using the waste heat from the kiln head and kiln tail of the new dry cement rotary kiln, with an annual power generation of 28.08 million kWh and an annual saving of nearly 654.38+/kloc-0.0 million tons of standard coal.
■ Equipped with four sets of circulating water treatment systems, with a circulation rate of over 96%.
■ Equipped with lubricating oil filtration system to recover waste oil and dirty oil, saving more than 100 tons of lubricating oil every year.
■ Using the waste heat of clinker outside the kiln to dry slag, fly ash and other mixed materials, saving 2880 tons of standard coal every year.