Metallurgical rotary kiln rotary kiln occupies a key position in the consumption of some rare metals and is used for heating emergency disposal such as terminating calcination and roasting of iron ore, titanium concentrate and positive intermediate materials.

Jianxin recommends analyzing the effect of rotary kiln on Metallurgical Industry:

The first step in aluminum smelting of blast furnace equipment is the consumption of aluminum oxide. In the step of consuming aluminum oxide by calcination method, the dry materials made of raw materials such as aluminum ore, lime powder and alkali should be calcined first. The whole calcination process is terminated in the rotary kiln, and the firing temperature is about 1300 ℃. One process for consumption of aluminum trioxide is to burn aluminum chloride into aluminum trioxide. At this stage, some processing plants still use rotary kilns with a burning temperature of 1200-1250 ℃. (embodied temperature refers to the temperature of raw materials, and the temperature of kiln gas used for heating is also higher than it by 200 ~ 300 ℃).

In the consumption of carbon plant products of mining equipment, the calcination of raw materials (such as petroleum coke, foundry coke, delayed time coke, asphalt coke and long flame coal) shall be terminated at 1100 ~ 1300 ℃ and without CO2, so as to clean the moisture content and volatile matter, make its structure more dense and solid, increase the true proportion, and improve heat resistance, oxidation resistance, impact toughness, conductivity and heat transfer. This whole process can be carried out in the rotary kiln.

Mining equipment

The consumption of bismuth oxide salt first uses hydrochloric acid and fluorite (CaF2) as raw materials to produce hydrogen fluoride, which is also terminated in the rotary kiln. For a variety of bismuth oxide products and coal ash and gypsum, the boring is also carried out in a boring (rotary) kiln.

Calcined alumina plant is often attached to a large category of tailings chemical plant. Rotary kiln is the key machinery and equipment for calcining cement clinker.

In the one-stage concrete separation method of consuming copper with refractory copper chloride iron ore, the iron ore is dry and broken, mixed with ~ 2% sodium oxide and 3.5 ~ 4% smoke fly ash to sign up for the rotary kiln.

In the ammonia leaching method for emergency disposal of copper containing tailings pond, the rotary kiln is first used to terminate the reduction and burning of the boring tailings pond.

During zinc hydrometallurgy, the leaching filter residue with output rate contains 20% zinc and some valuable metal materials. Generally, rotary kiln evaporation is selected for emergency treatment. For the low-grade active zinc oxide iron ore that cannot be immediately flotation reagent, the rotary kiln can also be used for evaporation and burning emergency treatment.

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