Pickling process and device for hot-rolled silicon steel strip using residual temperature
A silicon steel strip and pickling technology, applied in the field of steel processing and manufacturing, can solve the problems of environmental pollution, high cost, large acid consumption, etc., and achieve the effects of good effect, reduction of concentration and temperature, and energy saving.
Inactive Publication Date: 2016-06-29
武汉钢铁有限公司
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the defects of large energy consumption, high acid consumption, high cost and environmental pollution in the existing technology for removing iron scale on the surface of steel strips, and provide a simpler, low energy consumption, and effective hot-rolled silicon steel strip residue Warm Utilization Pickling Process and Its Equipment
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[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] Such as figure 1 As shown, the residual temperature of the hot-rolled silicon steel strip uses the pickling process, and the special device for realizing the process includes the cooling section 1 of the normalizing furnace, the thermometer 2, the shot blasting machine 3, the pickling tank 4, the hot air dryer 5, Coiler 6.
[0023] The process steps are as follows:
[0024] 1) The 120-500°C steel strip coming out of the cooling section 1 of the normalizing furnace directly enters the shot blasting machine 3 for shot blasting. A thermometer 2 is installed in front of the shot blasting machine 3 to detect the temperature of the steel strip coming out of the furnace. Whether it is within the specified range, according to the temperature requirements of the steel strip, reduce the flow rate of the cooling water pipe in the coolin...
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The invention discloses pickling process and device utilizing residual heat of a hot rolled silicon steel strip. According to the pickling process, a 120-500 DEG C steel strip which is taken out from a cooling section of a normalizing furnace enters a shot blasting machine to carry out shot blasting and then directly enters the bottom of a pickling tank to carry out pickling, and the steel strip after pickling enters a reeling machine to carry out reeling to obtain a steel strip to be rolled, wherein an oxide scale of the steel strip to be rolled is removed. With the adoption of the pickling process and device, as the residual heat of the silicon steel strip after normalizing is utilized to carry out pickling, the reaction speed of the oxide scale and acid at high temperature is increased, the effect is better, the concentration and the temperature of the acid can be lowered, the warming is not needed, and the energy is saved; in addition, as the high-temperature steel strip is arranged at the bottom of the pickling tank after entering the pickling tank, the heated acid liquor is difficult to volatilize, and the environment pollution is avoided. Compared with the existing descaling process, according to the pickling process, the adopted equipment is less, a flame heating device can not be needed, the energy, the equipment cost and the production cost are saved, and the pickling process is economic and feasible.
Description
technical field [0001] The invention relates to the field of steel processing and manufacturing, in particular to a hot-rolled silicon steel strip residual temperature pickling process and its device. Background technique [0002] The oxide scale on the surface of the hot-rolled steel strip is the secondary oxide scale formed at high temperature when the steel strip is rolled on a hot continuous rolling mill. Due to the difference in the chemical composition of steel, rolling temperature, finish rolling temperature, post-rolling cooling rate and coiling temperature, the organization and structure of surface oxide scale are also different. The iron oxide scale on the surface of the steel strip must be removed before cold rolling. [0003] Removing the oxide scale on the surface of the steel strip is commonly known as descaling. The descaling methods are generally divided into three types: mechanical descaling, chemical descaling and mixed mechanical and chemical descaling. ...
Claims
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IPC IPC(8): C23G1/08C23G3/02
Inventor 张凤泉严开勇曾春毛一民陈燕才
Owner 武汉钢铁有限公司