Regulation 3.2 AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR AN INNOVATION PATENT ORIGINAL Name of Applicant: Chengdu Jinhui Technology Co., Ltd Actual Inventor: ZHANG Yifan Address for Service: Level 23, 367 Collins Street Melbourne VIC3000 AUSTRALIA Invention title: WEAR-RESISTANT NOZZLE FOR LANCE IN ROASTER The following statement is a full description of this invention, including the best method of performing it known to me.
2 FIELD OF THE INVENTION The present invention relates to an accessory in facilities for the regeneration of waste acid, in particular to a wear-resistant nozzle for lance in roaster. 5 GENERALBACKGROUND Acid regeneration device utilizing spray roasting method is preferable in treatment of waste acid in industry. Nozzle for lance in roaster is indispensable in the regeneration process of waste acid, and it is usually applied in the process of pulverization spray of waste acid being filtrated by filter that is used to concentrate waste acid in the roaster, in 10 order to make ferric oxide powders separated out of waste acid after roasting process. The quality of ferric oxide powders will be dependent on the nozzle absolutely. However, the existing nozzle is structured complicatedly with high cost, and could be damaged easily. For example, the Chinese patent publication CN201729882U, entitled "nozzle for lance in 15 roaster", with the patent application No. CN201020186665.3, discloses a nozzle for lance in roaster, characterized in that the nozzle for lance in roaster comprises a nozzle body and a nozzle core, the nozzle body sheathes the nozzle core which is made of metal and rotatable, and have a 120 degree spray angle. This patent has its own disadvantage that the nozzle core would suffer abrasion and corrosion in the long term, and it causes short 20 working life of the lance. SUMMARY It is an object of the invention to provide a wear-resistant nozzle for lance in roaster to alleviate the above-mentioned problems in the prior art. The invention provides a 25 protection layer on the inner wall of the nozzle core to overcome technical problems existed in the prior art that there is short life of nozzle core due to abrasion and corrosion for nozzle core in the long term. The present invention features low cost, simple structure, convenient use, excellent properties of abrasion and corrosion resistance, and long life. 30 To achieve the above object, the present invention employs the following technical 3 solutions: A wear-resistant nozzle for lance in roaster comprises a nozzle body and a nozzle core, the nozzle body is configured around the outer nozzle core, and the nozzle core is rotatable. A 5 protection layer is configured on inner wall of the nozzle core, and the nozzle core could spray the waste acid at an angle in the range of 30 degree to 150 degree, reciprocatively and rotatively. The protection layer is made of corundum ceramic, which is formed in the temperature 10 higher than 2300"C. The nozzle body is connected to the nozzle core in manner of male and female buckles. The nozzle body is connected to the nozzle core by a threaded connection. 15 The present invention has the following advantages as compared with the prior art: 1. The present invention provides a protection layer on the inner wall of the nozzle core, in order to overcome the technical problems in the prior art that there is short life of nozzle 20 due to abrasion and corrosion in the long term. The present invention features low cost, simple structure, convenient use, excellent properties of abrasion and corrosion resistance, and long life. 2. The protection layer used in the present invention is made of corundum ceramic, which 25 is formed in the temperature higher than 2300"C. Such protection layer features high hardness and intensity, excellent chemical inertness and ductility of alumina. 3. The nozzle body is connected to the nozzle core in manner of male and female buckles in the present invention; alternatively, the nozzle body can be connected to the nozzle core 30 by a threaded connection; the present invention features simple structure, and convenient 4 replacement, clean and maintenance. BRIEF DESCRIPTION OF THE DRAWING Figure 1 depicts a schematic view of the present invention; 5 List of reference characters: I nozzle body; 2 nozzle core. 10 DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Embodiment 1 A wear-resistant nozzle for lance in roaster comprises a nozzle body 1 and a nozzle core 2. the nozzle body 1 is configured around the outer nozzle core 2, the nozzle core 2 is rotatable, a protection layer is configured on the inner wall of the nozzle 2, and the nozzle 15 2 could spray the waste acid at an angle in the range of 30 degree to 150 degree, reciprocatively and rotatively. In the present invention, the protection layer is made of corundum ceramic, which is formed in the temperature higher than 2300'C; The nozzle body is connected to the nozzle 20 core in manner of male and female buckles. In the present invention, the nozzle core 2 could spray the waste acid at an angle in the range of 30 degree to 150 degree, reciprocatively and rotatively, and the protection layer is made of corundum ceramic, and prevents the nozzle from abrading and corroding in the 25 long term, thereby the life of the nozzle would be prolonged. Embodiment 2 A wear-resistant nozzle for lance in roaster comprises a nozzle body 1 and a nozzle core 2, the nozzle body I is configured around the outer nozzle core 2, the nozzle core 2 is 30 rotatable, a protection layer is configured on the inner wall of the nozzle 2, and the nozzle 5 2 could spray the waste acid at an angle in the range of 30 degree to 150 degree, reciprocatively and rotatively. In the present invention, the protection layer is made of corundum ceramic, which is 5 formed in the temperature higher than 2300"C; The nozzle body is connected to the nozzle core by a threaded connection.