As the main raw material for direct reduction of rotary hearth furnace, the cold consolidated carbon briqued coal needs to go through transportation, distribution, reduction, discharge and other processes in the production process of rotary hearth furnace, so its performance in all aspects affects the smooth production and efficiency of rotary hearth furnace. In this paper, syrup was used as binder, vanadium titanium magnetite and pulverized coal were used as raw materials to study the influence of different binder ratio, forming pressure and water content on the cold consolidation performance of carbon pellet.

There is a shortage of scrap in steelmaking around the world. Due to the small domestic self-sufficiency of scrap in China and the unstable quality of scrap available, it is necessary to find alternatives to scrap.

Rotary hearth furnace technology (RHF) was developed and built in the United States in 1978 by the International Metal Company affiliated to INCO Group of Canada in order to treat and utilize metallurgical wastes. It can not only be used to treat dust produced by metallurgical plants and other wastes containing iron, chromium， and zinc, but also be used to reduce iron ore.

Ore powder briquette machine can be used to press pulverized coal, iron powder, coking coal, aluminum powder, iron filings, iron scale, carbon powder, carbon powder, slag, gypsum, tailings, sludge, kaolin, activated carbon, coke powder, and other powders, powder materials, waste materials, and waste residues. It is widely used in refractory, power plant, metallurgy, chemical industry, energy, transportation, heating, and other industries. It is energy-saving, environment-friendly, convenient for transportation, improves the utilization rate of waste materials, and has good economic and social benefits.

Cold-solidified briquetting is the main method for steelmaking sludge treatment in metallurgical enterprises at present.

Metallurgical ore powder briquette is a new type of furnace charge introduced in recent years. Because of its environmental protection and energy-saving characteristics in the production and use process, it is widely used in iron and steel, and ferroalloy enterprises instead of lump ore for smelting. The preparation of metallurgical pellets is an important part of the metallurgical process, which can not only improve the metallurgical physical and chemical properties of materials but also realize the resource utilization of industrial solid waste and an important way of the circular economy. Therefore, pelletizing technology is an important way to realize energy saving, environmental protection, and utilization of waste resources. The cold-pressed pellets prepared by this technology are also used as a burden for blast furnaces, direct reduction furnaces, cupola furnaces, and submerged arc furnaces.

In order to make the large and medium-sized ferroalloy reduction electric furnace run better, it is required that the burden should have proper fragmentation and ensure good air permeability. At present, the supply of high-quality lumpy burdens which can be directly used in the furnace is becoming increasingly tight. In order to adapt to this situation, some manufacturers adopt various lumping technologies and use fine ore and concentrate to obtain better smelting indexes. Among them, high-pressure briquette machine pelletizing technology has become a new development direction of ferroalloy pelletizing technology in recent years because of its simple process, fuel-saving, applicability to fine ore, and a wide variety.

"Cold-solidified briquettes" made by high-pressure briquetting machine using sludge, dust removal ash, and iron scale produced by steelmaking as raw materials, adding lime, and using organic glue as a binder.

For briquetting equipment, roller skin is one of the key parts and plays an important role in the equipment performance. The life of the roller skin determines the service time of the briquette machine, and the roller skin is also a vulnerable part of the briquette machine. Therefore, before making a purchase, it is important to carefully check the roller skin of the briquette machine, which can not only ensure the quality of the briquetting equipment but also reduce the equipment cost and improve the economic benefits.

The compressive strength of different kinds of dried sludge briquette also has obvious differences with the different addition ratios. This product is generally used for the treatment of mine, wastewater sludge and medical sludge. The main reason is that the different composition of sludge itself will also cause the difference of its cohesiveness, which is generally manifested in the difference of water content, inorganic matter and component. Organic components in medical sewage sludge mainly include: Protein, sugar, lipid and a large number of reproductive bacteria and parasites, etc.The organic components of domestic wastewater sludge and brewery wastewater sludge contain not only proteins, sugars, bacteria and parasites, but also some fibrous organic compounds, among which brewery wastewater sludge has high content of fibrous organic compounds. The research on the preparation of biomass briquette​ in Tsinghua University found that for long fibrous biomass, biomass forms a network in the briquette forming process. In a certain range, with the increase of screening, the fiber length increases, the crosslinking between biomass increases, and its forming rate increases. However, for granular biomass, there is basically no crosslinking between biomass, and it is difficult to form a reticular connection.