In order to solve the problem of thin layer, poor gas permeability, low output, poor quality and high energy consumption of fine concentrate in China, some experts at home and abroad have long tried to invent a good physical and chemical performance, high temperature performance and energy saving. A new method of building blocks. The "Pellet Sintering Method" absorbs the advanced part of the sintering process and the pelletizing process. Therefore, the pellet sintering method has the advantages of pellets and the advantages of sinter, saves energy, and improves the yield of sinter and quality. In addition, the process can not only produce alkaline pellet sinter, but also produce acidic pellet sinter, which can completely replace acidic pellets, and the indicators are not inferior to acidic pellets. Solving the problem of blast furnace charge structure in China has opened up a new way, namely high alkalinity sinter with acid pellets. The process of pellet production stations Chicago comparison, less investment, simple process operation, using a heat source is common to the coal powder. The process can be as popularized in our country, it will play an important role in development of China's steel industry. (1) Double-layered small pellets. There are two types of pellets, namely: Konica Minolata 1250,Konica Minolata 1050,Refacturing Konica Minolata,Konica Minolata C1085 Guangzhou Baiyin Co.,Ltd , https://www.machineprinter.com
In the sintering production, a mixed mixture is fed into a disc pelletizer or a cylindrical pelletizer to form a small ball. The small ball structure is divided into two parts, a core and a shell, and the specific structure thereof is as shown. Its characteristics are as follows: 
1) The core is rich ore and return to mine, the outer shell is fine concentrate, and a layer of fuel (pulverized coal or coke breeze) is adhered to the surface, as shown in Figure a;
2) The core is rich in ore and return to mine, the outer shell is fine concentrate, and the surface is adhered with a layer of fuel and quicklime, as shown in Figure b.
(2) The strength of the green ball is good (including the drop strength and compressive strength). The reason is that each ball has a core, and the core is rich ore particles or returned particles, so the strength is good.
(3) It is suitable for sintering fine fine powder, and all or part of the mixture causes small balls, which solves the problem of gas permeability of the mixture.