Treatment method of stainless steel pickling sludge
A technology of pickling sludge and treatment method, applied in the direction of improving process efficiency, can solve problems such as hidden dangers, environmental pollution, occupation of land resources, etc., and achieve the effect of harmless treatment
Active Publication Date: 2016-09-28
ZHANGJIAGANG POHANG STAINLESS STEEL
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Problems solved by technology
[0002] Because stainless steel pickling mud contains heavy metals, pouring it directly on the ground will pollute the groundwater
At present, the usual method is anti-seepage landfill treatment, but this passive treatment method does not fundamentally solve the problem, and there are still hidden dangers of environmental pollution. At the same time, landfill needs to occupy land resources
Method used
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Embodiment 1-4
[0029] Embodiment 1-4, take electric furnace one-time loading 100 tons of main raw materials as an example.
[0030] The following table 1 Be the main component and content (mass percentage) of stainless steel pickling sludge:
[0031]
[0032] The following table 2 To load the raw materials and content into the electric furnace, the mixture is mixed at a weight ratio of 1:9 (unit: ton):
[0033]
[0034] The following table 3 Main composition and content (mass percentage) of the obtained ferronickel alloy finished product for smelting:
[0035]
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Abstract
The invention discloses a treatment method of stainless steel pickling sludge. The treatment method can prevent land resources from being occupied and is harmless. The treatment method of the stainless steel pickling sludge comprises the steps that a, the sludge is dried through a drying machine, wherein the moisture of the sludge is dried to be below 20%; b, the dried sludge and waste steel are mixed according to the weight ratio of 0.8:9.2-2:8, wherein the relevant elements in the waste steel comprise, by weight percentage, 2.5-3.5% of C, 2.0-3.0% of Si, 3.0-4.0% of Cr and 7.0-9.0% of Ni; c, 2-5 parts of powdered lime is arranged at the bottom of an electric furnace; d, 16-20 parts of the sludge and the waste steel which are mixed are arranged in the middle of the electric furnace; e, 76-80 parts of waste steel are arranged on the upper portion of the electric furnace, wherein the relevant elements in the waste steel comprise, by weight percentage, 2.5-3.5% of C, 2.0-3.0% of Si, 3.0-4.0% of Cr and 7.0-9.0 parts of Ni; and f, the electric furnace is electrified to conduct smelting, most of high-valence heavy metal ions are smelted at high temperature to become the components of ferro-nickel alloy, and a small part of high-valence heavy metal ions are turned into insoluble metallic oxides to enter slag.
Description
technical field [0001] The invention relates to a treatment method for stainless steel pickling sludge. Background technique [0002] Because stainless steel pickling mud contains heavy metals, pouring it directly on the ground will pollute the groundwater. At present, the usual method is anti-seepage landfill treatment, but this passive treatment method does not fundamentally solve the problem, and there are still hidden dangers of environmental pollution, and landfill needs to occupy land resources. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a harmless stainless steel pickling sludge treatment method that avoids occupying land resources. [0004] For solving the problems of the technologies described above, the technical scheme adopted in the present invention is: a kind of processing method of stainless steel pickling sludge, and its steps are: [0005] a. Dry the sludge through a dryer, and dry the wat...
Claims
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IPC IPC(8): C22B7/00C22B4/06C22B23/02
CPCC22B4/06C22B7/001C22B23/02Y02P10/20
Inventor 肖锋卢万海
Owner ZHANGJIAGANG POHANG STAINLESS STEEL
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