According to statistics, in the metallurgical industry, the secondary iron resources of iron ore alone are more than 10 million tons per year; These secondary iron containing resources are mainly solid wastes after dry dedusting, wet dedusting and waste water treatment of the discharged dust in the smelting process of blast furnace, converter and electric furnace. The total iron content is generally 30-70%. According to the classification of sources, these iron ore slag wastes can come from: sintering dust sludge, pellet dust sludge, blast furnace gas ash, blast furnace gas sludge, steel-making dust sludge, converter sludge, electric furnace dust dust, raw material yard dust and tapping yard dust. These dust slurries have high iron content and fine particles. The moisture content of the wet dust collection dust slurries is high, reaching 20-50%; In iron and steel production, there is a large amount of iron containing dust and mud. According to the situation of domestic metallurgical enterprises, the average iron content is 100kg / T.

How can the slime produced by various channels and various metal slimes be further refined? The early practice was to make these slimes into pellets, and the production of pellets was divided into sintered pellets and cold fixed pellets. The sintering pellet is the concentrate powder that enters the sintering process after granulation. The cold solid pellet is the ore powder, dust mud and other materials plus the metallurgical pellet binder, which can be used after drying through the mixing and molding process. The cold solid pellet is to mix the mineral powder, dust dust and other powder materials with binders in proportion, produce the cold solid pellets through the ball press, and then dry or air dry them in the drying kiln to form a cold pressed pellet with uniform composition, uniform particle size and good strength.

There are obvious disadvantages in the early pellet refining methods, no matter whether it is the cold-set pellet method or the hot-set pellet method! In the cold setting pellet process, bentonite, cement, tar, starch, polyvinyl alcohol, etc. are mostly used as pellet binder in the pressing process; However, these binders will lead to serious grade reduction, poor high temperature resistance, high pulverization rate, and affect the quality of pellets; If tar is used as pellet binder, the pellet performance is good, but the production and application process is complex and the output is low. If the thermosetting pellet method is adopted, I believe everyone will understand when they see this name. It needs to be pressed first and then sintered; And it will cause secondary pollution!

In order to solve this problem in the metallurgical industry, Quanzhou Yihong brick machine has specially designed a pelletizing machine for the metallurgical refining industry from the perspective of brick machine, with Mr. Liu of Quanzhou Yihong brick machine as the market research director, in order to solve the problem of users conveniently, effectively and at low cost. The equipment shape and manufacturing process of the pelletizing machine developed by our company are basically the same as the brick making equipment and brick making process; However, it comes from the transformation of special places in the smelting industry; According to its forming principle, it still belongs to the cold solid pellet method.

We have mentioned earlier that the early cold consolidation pellet process needs to apply various mixed adhesives, but these adhesives will affect the grade of products. Quanzhou Yihong brick machine takes the forming principle of hydraulic brick press as the starting point. By adjusting the pressure, the dry humidity of the powder and the specifications of the pressed blocks, the powder can be pressed by the hydraulic brick press and dried to meet the hardness requirements of refining; So as to reduce the various sequelae caused by the cold solid ball method in the past! In addition, for some mineral powders with certain viscosity or long coagulation time, there are also users who press them through the non pallet brick machine; If we can use the non pallet brick machine to form, the cost in the process of pressing and forming mineral powder will be less. At present, some users refine nickel powder again, and some use the non pallet brick machine to press nickel powder.

At present, the experiments of Quanzhou Yihong hydraulic brick machine and pallet free brick machine have been conducted for hundreds of times, and good results have been achieved in the treatment of copper, iron, aluminum, nickel and other mineral powders and slag; Moreover, many domestic smelters have reached friendly cooperation agreements with our company. If the hydraulic brick machine and the plate-free brick machine are used as the dough making machine, the pressed mud cake is either strip like or the same as the bricks; Or it is pie shaped and cannot be pressed into a ball. Since the briquette is not spherical, it also facilitates the molding, clamping and transportation of the briquette, which is much higher than the previous cold solid pellet method!

Based on our experiments and the production experience of existing users, we can clearly conclude that the pelletizing machine specially designed by Quanzhou Yihong brick machine has the following advantages:

1. High production efficiency, low cost, flexible production, no need for adhesive; Avoiding the sequelae caused by the use of adhesive.

2. The pressing process is more environmentally friendly and will not produce more dust or energy consumption or secondary pollution like sintering.

3. According to the actual needs, the degree of mechanization of the suppression process can be adjusted, and the more suitable investment mode can be selected from the personal interests.

4. The equipment is simple to operate and can be produced sustainably without being affected by external factors.

Change the traditional cold solid pelletizing method and choose the newly improved pelletizing machine of Quanzhou Yihong brick machine to easily solve the problem of slag and mineral powder briquetting in the smelter, making it easy to recycle scattered resources again! If you have equipment consulting needs or are interested in cooperating with our company, please contact Mr. Liu of Quanzhou Yihong brick machine Co., Ltd. to provide one-stop service!

Tel: 15060809956