年产3200吨锌白铜板带车间工艺设计总说明(2)
White Copper With an Annual Yield of 3.2 Thousand tons
This design is based on chinalco Shanghai copper co., LTD. 94 workshop as reference model, and carries on the design. The workshop area is 264000 * 6300 ,height about 5000mm, Labor personnel 50 people, the typical productions are stripe plate of white copper, stripe brand is BZn15-20,size is 0.8*200*718,390mm.the brand of white copper plate is BZn15-21-1.8,size of which is 2.0*400*2,500mm.The annual production of new workshop is predict to 3,647t.
Choose horizontal continuous casting and cold rolling production process, which is white copper production in the world at present the most advanced technology, Process for the production is ingredients — smelting — Composition analysis — Holding furnace — Horizontal continuous casting — curly — Double-sided milling — Advance finished product annealing — Surface cleaning — Two roller roughing — Intermediate annealing — Surface cleaning — Four roller rolling — Intermediate annealing — Surface cleaning — Twelve roll finishing — The finished product annealing — Surface cleaning — shear — Finished goods inspection — Packaging and storage. Main process , equipment and parameters as follows:
Smelting and Holding furnace: the equipment of smelting is 1.5t Low frequency has a core of electric furnace, the temperature of smelting is 1280～1350℃, Smelting in boiling degassing method is used to remove liquid hydrogen in the gas, etc, Using Bi, Sb, As, etc As modifier for refining grain size and improve the plastic. 4t Holding furnace to hold heat.
Horizontal continuous casting: temperature is 1230～1280℃. Water quality continuous casting using "back - pull - stop - back - - stop" program, add a back stepping procedure. Working backward level of continuous casting process is usually: 0 ~ 2 mm, out of 10 ~ 15 mm, stop 1 ~ 3 s, then push 0 ~ 2 mm. The strip temperature control in commonly 320 ~ 380 ℃.
Heat treatment: Heat treatment including Uniform annealing, intermediate annealing and finished products. The uniform annealing temperature is 630 ~ 700 ℃, Homogenization annealing and intermediate annealing by bell type annealing furnace, Finished product annealing using air cushion type continuous annealing furnace annealing.
Cold rolling: Argentan to cold work have good performance, the cold rolling working rate can reach more than 80%. But Chinese white copper plate with high strength, process rolling load is big, to some extent, the way of the material times working rate depends on the ability to mill. White copper strip in rolling, is the main quality problems encountered in various types of edge crack and crack in the middle. To prevent cracking of rolling, in addition to need the good quality of the strip casting, the performance of the mill and rolling winding way is also important factor.
Surface cleaning: White copper with 10% ~ 15% of dilute acid pickling is available, surface cleaning can promote the quality of white copper.
Finishing: Finishing mainly include straightening and scale, Straightening the stretch bending straightening method is adopted, Use camber of cutting strip and Plate using oblique camber of cutting blade.
Key Words: Horizontal continuous casting and cold-rolled; Strip Plant of White Copper; Workshop design
目 录
1 绪论 1
1.1 概述 1
1.2 国内外铜板带材生产现状 1
1.2.1 国内铜板带材生产现状 1
1.2.2 国外铜板带材生产现状 2
1.2.3 国内与国际铜板带材产品比较 2
1.3 设计项目提出背景 3
1.4 设计原则 3
2 市场分析 5
2.1 世界铜板带材的消费 5
2.2 未来铜板带需求预测 5