Magnetic separation steel slag recycling method
A steel slag recovery and magnetic separation technology, which is applied in the direction of recycling technology, manufacturing converters, process efficiency improvement, etc., can solve problems such as environmental pollution, reduce costs, reduce steel slag emissions, and reduce steelmaking solid waste emissions Effect
Pending Publication Date: 2022-07-08
SHANDONG LAIGANG YONGFENG STEEL & IRON
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Problems solved by technology
It contains a certain amount of iron, CaO, MgO, SiO 2 Etc., the discharge amount is about 50-70kg / t. Since the steel slag has a certain alkalinity and contains harmful elements such as sulfur and phosphorus, long-term stacking will cause environmental pollution.
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[0020] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict. It should also be understood that the terms used in the embodiments of the present invention are for describing specific specific embodiments, rather than for limiting the protection scope of the present invention. In the following examples, the test methods without specific conditions are usuall...
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The invention provides a magnetic separation steel slag recycling method which comprises the following steps: when a first batch of flux is completely melted and the temperature of molten steel is greater than or equal to a first threshold value, on the basis of a temperature drop coefficient of magnetic separation steel slag, obtaining a first dosage value of the magnetic separation steel slag, and adding the magnetic separation steel slag with the first dosage value into a converter; when the content of CO in the converter is larger than or equal to a second threshold value, a second dosage value of the magnetic separation steel slag is obtained on the basis of the temperature drop coefficient of the magnetic separation steel slag, and the magnetic separation steel slag with the second dosage value is added into the converter; when the slag approaches and is about to be dried, raising the robbing position, obtaining a third dosage value of the magnetic separation steel slag on the basis of the temperature drop coefficient of the magnetic separation steel slag, and adding the magnetic separation steel slag with the third dosage value into the converter; and when the converter is turned down for temperature measurement, if the temperature of the molten steel is greater than a third threshold value, a fourth dosage value of the magnetic separation steel slag is obtained on the basis of the temperature drop coefficient of the magnetic separation steel slag, and the magnetic separation steel slag with the fourth dosage value is added into the converter.
Description
technical field [0001] The invention relates to the field of steel slag recycling, in particular to a magnetic separation steel slag recycling method. Background technique [0002] Steel slag is an industrial waste slag produced in the process of converter steelmaking. It mainly comes from oxides produced by redox reactions in the converter smelting process, impurities brought in by scrap steel, slag-forming agents, and charge that erodes the furnace lining. It contains certain iron elements, CaO, MgO, SiO 2 Etc., the discharge is about 50-70kg / t. Because the steel slag has a certain basicity and contains harmful elements such as sulfur and phosphorus, long-term stacking will cause environmental pollution. [0003] After being processed by the slag stewing process and the magnetic separation process, the part of the steel slag with higher iron content is the magnetic separation steel slag. Due to the high iron content in the magnetic separation slag, it needs to be recycle...
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Login to View More IPC IPC(8): C21C5/28C21B3/04
CPCC21C5/28C21B3/04Y02W30/50
Inventor 于生鹏苏庆林王秋坤徐洪磊吴长亮王兴中
Owner SHANDONG LAIGANG YONGFENG STEEL & IRON