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Process for the preparation of agglomerates for blast furnace feed from fine metal oxide-containing materials

A technology of fine materials and blast furnace feeding, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of weak bonding of sintered materials, poor gas permeability of sintered materials, and limited proportion of fine ore, and achieve high cohesion. , to avoid heat loss, the effect of good gas permeability

Active Publication Date: 2015-12-16
PHEINKALK GMBH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Furthermore, the proportion of fine ores that are difficult to agglomerate is limited, since a high proportion of such particle sizes weakens the cohesion of the sinter mass and can also result in a strong dedusting from the sinter belt
Furthermore, a high fraction of intermediate particle sizes makes the gas permeability of the sinter charge worse and leads to a high fraction of residues during the sintering process

Method used

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  • Process for the preparation of agglomerates for blast furnace feed from fine metal oxide-containing materials

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Embodiment Construction

[0065] In the following, the invention is further elucidated by means of examples.

[0066] Five different sintered ribbon mixes (mixtures 1, 2, 3, 3a, 3b) were prepared. To prepare the mixed materials 3a and 3b, the fine material with a defined proportion of intermediate particles is mixed with the respective binders and customary sintering auxiliary materials and the mass moisture is adjusted. For the mixture 3b according to the invention mineral raw materials are used as binders, which have a silicon oxide fraction of at least 40% by weight, a fraction of ultrafine particles with a particle size of less than 4 μm of at least 20% by weight, and a particle size of at least 10% by weight Particle fraction smaller than 1 μm.

[0067] Mixtures 1, 2 and 3 were prepared without the addition of binder. Next, the mixture is mixed with water and coated on the sintered belt. Mixed materials have a special gas permeability, which can be measured by means of the pressure loss of the ...

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Abstract

The invention relates to a method for the preparation of agglomerates for use as a blast furnace charge by making a fine material containing metals and / or metal oxides, a mineral binder with mineral raw materials and lime-like materials, and If necessary, the usual additives are mixed into agglomerates and the agglomerates are solidified into agglomerates, wherein a raw material is used as mineral raw material which has a silicon oxide fraction of at least 40% by weight and at least 20% by weight of particle sizes smaller than A fraction of ultrafine particles of 4 μm, and a fraction of particles with a particle size of less than 1 μm of 10% by weight. The invention also relates to a blast furnace charge, which can be prepared by the method according to the invention, and to a premix for preparing the blast furnace charge.

Description

technical field [0001] The invention relates to a process for the preparation of agglomerates comprising metal and / or metal oxide-containing fines and mineral binders. The invention further relates to a blast furnace charge, which can be prepared by the method according to the invention, and to a premix for preparing the blast furnace charge. Background technique [0002] It is known that, in addition to lump ore, materials containing fine iron ore can also be used to prepare blast furnace charges. Material containing fine iron ore is produced, for example, by sieving lumpy ore or by other processing methods. The advantage of using fine iron ore is that such ore is readily available and inexpensive. It is common practice to agglomerate fine iron ore prior to use. In this way, dust formation in the blast furnace can be kept as low as possible. In addition, the advantage of coagulation treatment is that the formed coagulation can be easily melted and has good gas permeabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/20C22B1/24C22B1/243C22B1/16
CPCC22B1/20C22B1/205C22B1/24C22B1/2406C22B1/243C21B5/00C21B5/008C21B5/02C22B1/16
Inventor 特奥·京特马蒂亚斯·布洛泽丹尼丝·阿尔费娜·莫雷拉阿恩德·皮克布雷内克里斯托弗·普斯特沃尔夫冈·吕克特
Owner PHEINKALK GMBH
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