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Thermal air tight treatment method of hot state steel slag
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A treatment method, hot steel slag technology, applied in the field of hot steel slag hot stuffy treatment, can solve the problems of reducing the quality of recycled steel slag, narrow temperature limit range, low product pulverization rate, etc., to prevent steam explosion and wide application range , the effect of speeding up the processing process
Active Publication Date: 2007-05-30
CHINA JINGYE ENG TECH CO LTD +3
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Abstract
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Problems solved by technology
[0005] 1. The temperature limit range before entering the hot stuffy tank is narrow, 400-600°C, which is not widely used
[0006] 2. When spraying water, the pulverization rate of the product is low due to uneven water volume, which reduces the quality of recycled steel slag, which wastes water resources and may cause the pool cover to explode due to excessive steam pressure in the pool, making production unsafe
[0007] 3. The processing time is longer and the production efficiency is lower
Method used
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Embodiment 1
[0022] The present embodiment comprises the following steps: spraying-stop spraying-digestion;
[0023] The spraying step includes: putting the steel slag with a temperature of 350°C into the hot stuffy tank, spraying it with water mist, spraying and pulverizing it for 3 hours, and stopping the spraying when the temperature reaches 80°C.
[0024] Digestion step: Including static cooling to 65°C for 4 hours to terminate, and obtain the product.
Embodiment 2
[0026] The present embodiment comprises the following steps: spraying-stop spraying-digestion;
[0027] The spraying step is as follows: put the steel slag with a temperature of 550°C into the hot stuffy tank, spray it with water mist, spray and pulverize it for 5 hours, and stop spraying when the temperature is 80°C; then carry out the digestion step,
[0028] The digestion step is to cool down for 4 hours and terminate at 65° C. to obtain the product.
Embodiment 3
[0030] The present embodiment comprises the following steps: spraying-stop spraying-digestion;
[0031] The spraying step is as follows: put the steel slag with a temperature of 750°C into the hot stuffy tank, spray it with water mist, carry out spraying and pulverization for 6.5 hours, and stop spraying when the temperature is 80°C; then carry out the digestion step,
[0032] The digestion step is to cool down for 4 hours and terminate at 62° C. to obtain the product.
[0033] By adopting the process method of the invention, the metal recovery rate is increased by 10%. 30% of water is saved, and the time required for the process cycle is reduced by about 5 hours compared with the original process method. The process does not add alkali oxides such as lime, carbon powder, coke powder and other state-modifying agents, so the cost is reduced.
[0034] In the above-mentioned embodiments, the nozzle used for spraying water mist is a YJ-H-04-01 type spray nozzle or a spiral spray...
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Abstract
The invention relates to thermal state steel slag heat stuff treatment method. Its feature includes the following steps: spray-stopping-counteraction; the spray includes: putting steel slag with 300-800 centigrade degree into heat stuff pool; sprinkling for 3-7 hours by water smoke; reaching 75-85 centigrade degree stop the sprinkling; the counteraction includes cooling the steel slag for 3.5-4.5 hours; reaching not more than 65 centigrade degree; stopping the cooling to gain the manufacture. The invention has the advantages of wide steel slag temperature restricted area, increasing its recovery, economizing water, high efficiency, and safe production.
Description
technical field [0001] The invention relates to a treatment method for steel slag, in particular to a hot stuffy treatment method for hot steel slag. Background technique [0002] In the metallurgical industry, a large amount of smelting steel slag needs to be processed and comprehensively utilized to help improve the environment and improve economic benefits. The smelted steel slag includes converter steel slag, electric furnace oxide slag and reduced slag. These steel slags boil and float on the molten steel during the smelting process. Due to the splashing of molten steel, the steel slag and iron particles are wrapped together and discharged outside the furnace. After cooling, they become lumps. Residual steel is not easy to recycle. [0003] Existing steel slag treatment methods include water quenching method hot splashing, air quenching method drum type wheel method disc splashing method and hot stuffing method. Wherein in hot stuffy method, the method that has can on...
Claims
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Application Information
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