Saint-Petersburg State Mining University (Russia):

V.B. Kuskov

A.V. Kornev

E-mail: opikvb@mail.ru; opiopi@bk.ru

Iron ore briquettes were made by the following technology: feeding ore was gone to preliminary screening directly before metallurgical processing for sifting of a particle with size more then 5 mm. he class with particle size less then 5 mm after dispensing is mixed up with a solution of carboxymethyl-cellulose and is gone to briquetting. Crude briquettes after sieving of ore fines (which are returned in mixing operation) are gone to drying. After drying briquettes are exposed to control screening and sifting of dry briquettes is returned to mixer. Briquettes were made with various concentration of solution of carboxymethyl-cellulose: 1.0; 2.5 and 4.0 %.

Concentration of 2.5 % is optimum when concentration of smaller briquettes turned out insufficiently durable, and when it is bigger, durability of a briquette practically didn't raise, and consumption carboxymethyl-cellulose increased. Pressing pressure is varied from 30 to 80 МPа. For receiving of rather durable briquettes, pressure of pressing 40 – 50 МPа is sufficient. The further increase of pressing pressure is inexpedient, because durability of briquettes grows insignificantly, and expenses increase.

The offered technology of briquetting allows to receive iron ore briquettes with high durability and practically without decreasing of iron content.

1. V.E. Lotosh, A.I. Okunev. Annealing-free clotting of ores and concentrates. –M.: Nauka, 1980.

2. Method of preparation of furnace-charge material for metallurgical processing. An application for RF patent. № 2011118712 10.05.2011.