Treatment method for sintering oil-bearing graphite sludge in ingredient ore

Abstract

The invention discloses a treatment method for sintering oil-bearing graphite sludge in ingredient ore. The percentages by weight of sintered return ore and the oil-bearing graphite sludge are as follows: 60-80% of sintered return ore and 20-40% of oil-bearing graphite sludge. The specific treatment process comprises the following steps of: selecting the end of a secondary material field as a uniform mixing place of the oil-bearing graphite sludge and the sintered return ore; firstly paving the sintered return ore on the end of the secondary material field; pouring the oil-bearing graphite sludge on the sintered return ore; then, uniformly mixing the sintered return ore and the oil-bearing graphite sludge by using a forklift truck; stacking for over three days; after the two materials are naturally permeated, taking the two materials on a hopper of a belt conveyer by using a loader; and stacking with other iron materials in neutralization materials, wherein the water content of the oil-bearing graphite sludge and the sintered return ore stacked in the neutralization materials is 8-10%.

Description

technical field [0001] The invention relates to the field of metallurgical industrial production, in particular to a treatment method for oily graphite sludge used in sintering ore blending. Background technique [0002] Oily graphite sludge is a kind of waste produced during the rolling process of seamless steel pipes. It is formed by the combination of graphite lubricants with extremely fine particle size and machine grease dropped during the steel pipe processing process. Graphite sludge contains high iron and carbon content (20-60% iron content and 30% carbon content). If it can be used in sintering ore blending, it can reduce the treatment cost of oily graphite sludge and reduce the cost of sintering blending. mine cost. However, oily graphite sludge has high viscosity, high oil content (20% oily volatile matter), and extremely fine particle size. High viscosity prevents oily graphite sludge from being transported on the belt to participate in pre-batching. High oil c...

AI Technical Summary

Problems solved by technology

High viscosity prevents oily graphite sludge from being transported on the belt to participate in pre-batching. High oil content and fine particle size will cause graphite to enter the large flue along with the exhaust gas during the sintering process, endangering the safety of the main electrostatic precipitator and affecting the normal operation of the main exhaust fan.

In addition, the oily graphite sludge has a high water content (up to 40-50%). When it is used, it will stick to the equipment, block the slot, and cannot be used. If it is allowed to dry naturally, it will agglomerate (the raw material for sintering requires powdery materials, and there should be no large lumps), cannot be properly dosed like other iron-containing raw materials

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