Design of Sintering Workshop for Lead and Zinc Concentrate
1 Introduction
Lead and zinc concentrates are important secondary ore materials. After being smelted, they can become important raw materials for many industrial fields including chemical, machinery, electronics and communications. Sintering is an important processing link in the smelting of lead and zinc concentrates. This paper aims to analyze the design of sintering workshop for lead and zinc concentrates.
2 Design Requirements
2.1 Production capacity requirements
The hourly output of the sintering workshop for lead and zinc concentrate should meet the production requirements of 200-400 tons/hour. Taking into account the length of shutdown and maintenance operations and the safety requirements, the design of the workshop should refer to the continuous production of 180-200 tons/hour.
2.2 Technology Requirements
For the design of sintering workshop for lead and zinc concentrate, the process should adopt the advanced circulating fluidized bed sintering technology, which can not only improve the sintering quality, but also maintain stabilizing in material sintering, the indicators of which can reach the following standard: particle size not exceeding 0.5mm, Fe content not less than 64.5%, S content not exceeding 0.5%, Zn content not less than 59.5%, Pb content not less than 60%. Furthermore, the product should meet the requirements of mixing granules after sintering.
3 Process Design
3.1 Sintering cycle
The sintering cycle of lead and zinc concentrate is composed of storage silo, dry material hopper, sinter machine, sintering cooler, finished product storage bin, conveying system and other equipment. The whole cycle should adopt continuous and automatic production.
3.2 Technology parameters
The process technology parameters of sintering workshop for lead and zinc concentrate are determined by batch and continuous tests. The main process parameters include material particle size, sintering temperature, sintering time, sintering chamber size, sintering speed, particle distribution and other parameters, which should be controlled during the sintering process to ensure that sintering conditions meet the requirements of sorting granules after sintering.
4 Equipment Design
4.1 The sintering machine
Sintering machine is the key equipment for sintering workshop. The model of sintering machine determines the production capacity and effect of sintering quality. Taking into account such factors as production capacity, sintering quality, energy consumption and maintenance safety, FL-17.1 model sintering machine is selected to equip sintering workshop for lead and zinc concentrate.
4.2 Dedusting equipment
In order to control dust emission and improve the working environment, a dry type electrostatic precipitator is needed in the sintering workshop for lead and zinc concentrate. Due to the small amount of dust emission, an S-17 type wet type electrostatic precipitator can be selected.
4.3 Cooling water system
In order to effectively control the temperature of the sintering workshop, a cooling tower is required, and in order to ensure the cooling effect of the cooling tower, a sufficient heat exchange area should be taken into account in the design of the cooling tower, which is preferably selected as GZ-7 type cooling tower.
4.4 Material handling equipment
Material handling equipment should be adopted in the workshop to improve production efficiency. For this sintering workshop, the belt type bucket elevator, GF-6 belt conveyor, GFS-20 belt feeder, ZL-20 electromagnetic vibrating feeder and Gf-10 Batch Mill feeder can be selected, which can meet the storage and transportation of materials required in the workshop.
5 Conclusion
Lead and zinc concentrates are important secondary ore materials, and sintering is an important link of smelting. The design of sintering workshop learns the advanced continuous circulating fluidized bed sintering technology, referring to the principle of continuous production of 180-200 tons/hour. In terms of technology parameters, particle size, sintering temperature, sintering time, sintering chamber size, sintering speed, particle distribution and other parameters are determined by batch and continuous tests. FL-17.1 model sintering machine is chosen with the selection of S-17 type wet type electrostatic precipitator and GZ-7 type cooling tower. Belt type bucket elevator, GF-6 belt conveyor, GFS-20 belt feeder, ZL-20 electromagnetic vibrating feeder, and Gf-10 Batch Mill feeder are selected to assist in material handling, making the production process in the workshop efficient and stable.
