CN1059469C - Cold pressing flake iron ball cooling, slag melting agent and making method thereof - Google Patents

Abstract

The present invention relates to a special temperature decreasing and slag melting agent used for steel making and a preparing method thereof, which is characterized in that the temperature decreasing and slag melting agent comprises 77% of rolled iron oxide sheets, 7% of sensing agent, 5% of lime, 5% of calcium fluoride and 6% of adhesive. The preparing method comprises: the iron oxide sheets and the sensing agents as solid materials are ground into powder of 60 to 80 micrometers, and then, lime, calcium fluoride powder and the adhesives are added and mixed; the mixture is pressed into pellets with the specification of 20*30mm by a pelletizer, and the pellets are dried and solidified into the temperature decreasing and slag melting agent of cold compression iron scale pellets.

Description

The cold pressing cooling of iron scale pelletizing, dissolving agent and manufacture method thereof

The invention belongs to field of metallurgy, particularly be used the cold pressing cooling of iron scale pelletizing, dissolving agent and manufacture method thereof during steel-making converter smelt to be produced.

In steelmaking process, separate as early as possible in order to make slag, and can control suitable terminal temperature, need to add cooling (cooling), change slag (fluxing) agent.At present, each producer is with block iron ore, and as cooling, dissolving agent, still, natural ore iron content, ferric oxide amount are lower as natural ore, fluorite, steel scrap, and great majority be acid ore deposit, influences the work-ing life of converter, the consumption of increase Jiao, coal; Steel scrap, fluorite are because composition stone fixedly lacks accurate measurement, and the steel scrap proportioning can not science be controlled, and cause the liquid steel temperature fluctuation of tapping back big, and mid-term, slag returned dried serious; The fluorite consumption is big, causes disadvantageous effect for operation, furnace life, and result of use is all undesirable.

The object of the present invention is to provide a kind of reduction Jiao, consumption of coal amount, improve and smelt efficient, utilize Metallurgical Factory's " three wastes " product to reduce the cold pressing cooling of iron scale pelletizing, dissolving agent and the manufacture method thereof of pollution protection environment.

The object of the present invention is achieved like this, is described as follows:

A kind of iron scale pelletizing cooling of colding pressing, dissolving agent by following raw material by weight hundred scores than forming: iron scale 77% converter mud 7% lime 5% fluorite 5% tackiness agent 6%.

A kind of above-mentioned manufacture method of colding pressing the cooling of iron scale pelletizing, dissolving agent is:

1. according to prescription iron scale, converter mud are weighed up, grind to form the powder of 60-80 micron;

2. again lime, fluorite and iron scale, converter mud powder mixes are stirred the companion, fully digestion adds tackiness agent, is compressed to the solid pelletizing through nodulizer;

3. with the pelletizing oven dry, be consolidated into the pelletizing finished product of 70 kilograms/of ultimate compression strength.

Accompanying drawing 1 is a process flow sheet

Description of drawings and embodiment: the solid material in the accompanying drawing is meant iron scale and converter mud, and iron scale results from Steel Plant's continuous casting, rolls plate, the small-sized material operation of rolling, is a kind of callable dead meal; Converter mud results from converter gas purification system-settling tank, and promptly the mud in the pond is made converter mud through dehydration; Raw material commonly used in the promptly metallurgical industry of lime in the raw material, fluorite and adhesive glass water can have been bought; Grinding in the accompanying drawing promptly is to weigh up iron scale and converter mud by prescription to grind to form fine powder and mix; Add lime powder, the fluorite powder that weighs up according to process flow sheet then, add again, mix, stir, enter nodulizer again and be pressed into the solid pelletizing as tackiness agent bubble flower alkali; At last the pelletizing oven dry is the pelletizing that the iron scale pelletizing is lowered the temperature, dissolving agent is made of colding pressing.

The iron scale pelletizing of colding pressing cooling, dissolving agent manufacture method embodiment:

1., at first get the raw materials ready: iron scale, perceptual agent, fluorite and lime are ground to form the 60-80 micron respectively

Fine powder, standby;

Weigh up 77 tons of iron scale powder, 7 tons of converter muds, 5 tons of lime powders, 5 tons in fluorite powder, mix, stir, add 6 tons in tackiness agent again, stir, be pressed into the solid pelletizing of 20 * 30 millimeters of specifications with nodulizer 2., respectively;

3., again with pelletizing oven dry, be consolidated into the pelletizing finished product of 70 kilograms/of ultimate compression strength.

Advantage of the present invention be can clearly be seen that by this product characteristics, and existing Chemical Composition with this product is listed as follows:

Composition % title	TFe	?SiO	?CaO	?MgO	?S	?R	?FeO
								The iron scale pelletizing of colding pressing	70.15	?1.35	?2.75	?0.54	?0.038	?2.03	?58.15
Iron ore	63	?4.7	?0.3		?0.015		?4

Can find out by contrast in the last table, the product iron-holder that the present invention makes improves 7.15%, this has just improved recovery rate of iron, 1 ton of this product of every use can increase by 0.0715 ton of output, calcium oxide increases by 2.45%, this is the key that good fusing assistant can impel the morningization slag, changes slag as everyone knows well, and the morningization slag can shorten duration of blast, improve the output and the quality of sodium and protect and serve as a contrast the life-span, this product is the cooling dissolving agent of synthetic, and its composition is a fixed, and every adding accounts for 1% coal-pressing ball of metal Intake Quantity, can reduce furnace temperature 30-40 ℃, and the adding mode is flexible, is convenient to hit terminal temperature, improves the qualification rate of steel.More than contrasting the iron scale pelletizing of colding pressing as can be seen is more satisfactory cooling, dissolving agent.

The use-case result is as follows for iron main office of this product economy Nangang:

1. in the steel-making, use the Ore Imported fusing assistant, heat dissipation 1412172KJ per ton (290000 kilocalories), use per ton heat dissipation 481965KJ of product of the present invention (139000 kilocalories), minimum saving heat 632207KJ per ton (9151000 kilocalories), fall at the end burnt, consumption of coal amount, the time that the refining one heat steel was saved 2-2.5 minute, improved smelting efficient;

2. the present invention has made full use of metallurgical works " three wastes " product: steel rolling iron scale and converter mud, utilized existing resource, and reduced pollution, protected environment.

Claims (2)

1, a kind of iron scale pelletizing cooling of colding pressing, dissolving agent, it is characterized in that it by following raw material by weight hundred scores than forming: iron scale 77% converter mud 7% lime 5% fluorite 5% tackiness agent 6%.

2, a kind of manufacture method of above-mentioned the cold pressing cooling of iron scale pelletizing, dissolving agent is characterized in that:

1. according to prescription iron scale, converter mud are weighed up, grind to form the powder of 60-80 micron;

2. lime, fluorite and iron scale, converter mud powder mixes are stirred, thorough mixing adds tackiness agent, is compressed to the solid pelletizing through nodulizer again;

3. with the pelletizing oven dry, be consolidated into the pelletizing finished product of 70 kilograms/of ultimate compression strength.

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