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Heterogeneous efficient dephosphorization agent and preparing method of heterogeneous efficient dephosphorization agent

A dephosphorization agent and heterogeneous technology, which is applied in the field of heterogeneous high-efficiency dephosphorization agent and its preparation, can solve the problems of complex preparation process and environmental pollution, and achieve the effect of reducing production cost and avoiding pollution

Active Publication Date: 2015-12-09
UNIV OF SCI & TECH LIAONING +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually iron trioxide, calcium oxide and alumina are pre-melted at high temperature to produce hot metal pretreatment dephosphorization agent for hot metal dephosphorization, but the preparation process of this dephosphorization agent needs to be pre-melted to above 1000°C, and the preparation process is relatively slow complex
There is also a catalytic dephosphorization agent developed, but this dephosphorization agent contains a certain amount of F, which will cause pollution to the environment

Method used

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  • Heterogeneous efficient dephosphorization agent and preparing method of heterogeneous efficient dephosphorization agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 heterogeneous efficient dephosphorization agent

[0028] (1) The ratio of heterogeneous high-efficiency dephosphorization agent is as follows

[0029]

[0030] (2) The preparation method of heterogeneous high-efficiency dephosphorization agent is as follows:

[0031] 1) Dry the waste iron oxide powder at 150-300°C for 3 hours to drain the water and control the water to less than 2.0%;

[0032] 2) Mix 450Kg of iron oxide scale powder after drying with 20Kg of clay, 350Kg of limestone powder and 50Kg of bauxite powder;

[0033] 3) Add 60Kg of sodium silicate to the uniformly mixed material, and use a ball press machine to mechanically press it into balls, so that the particle size of the material is 30mm to 50mm;

[0034] 4) Put the spherical material into the kiln and dry at 150°C.

[0035] 5) Pack after natural cooling.

[0036] The main technical indicators of the product are shown in Table 2.

Embodiment 2

[0037] Embodiment 2 heterogeneous efficient dephosphorization agent

[0038] (1) The ratio of heterogeneous high-efficiency dephosphorization agent is as follows

[0039]

[0040] (2) The preparation method of molten iron pretreatment dephosphorization agent is as follows:

[0041] 1) Dry the waste iron oxide powder at 150-300°C for 3 hours to drain the water and control the water to less than 2.0%;

[0042] 2) Mix 450Kg of iron oxide scale powder after drying with clay 10Kg, limestone powder 250Kg and bauxite powder 100Kg;

[0043] 3) Add 70Kg of sodium silicate to the uniformly mixed material, and use a ball press machine to mechanically press it into balls, so that the particle size of the material is 30mm to 50mm;

[0044] 4) Put the spherical material into the kiln and dry it at 150°C;

[0045] 5) Pack after natural cooling.

[0046] The main technical indicators of the product are shown in Table 2.

Embodiment 3

[0047] Embodiment 3 heterogeneous high-efficiency dephosphorization agent

[0048] (1) The ratio of heterogeneous high-efficiency dephosphorization agent is as follows

[0049]

[0050]

[0051] (2) The preparation method of molten iron pretreatment dephosphorization agent is as follows:

[0052] 1) Dry the waste iron oxide powder at 150-300°C for 3 hours to drain the water and control the water to less than 2.0%;

[0053] 2) Mix 450Kg of iron oxide scale powder after drying with 20Kg of clay, 400Kg of limestone powder and 80Kg of bauxite powder;

[0054] 3) Add 80Kg of sodium silicate to the uniformly mixed material, and use a ball press machine to mechanically press it into balls, so that the particle size of the material is 30mm-50mm;

[0055] 4) Put the spherical material into the kiln and dry at 200°C;

[0056] 5) Pack after natural cooling.

[0057] The main technical indicators of the product are shown in Table 2.

[0058] Table 2

[0059]

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Abstract

The invention relates to a heterogeneous efficient dephosphorization agent and a preparing method of the heterogeneous efficient dephosphorization agent, and belongs to the technical field of ferrous metallurgy. The heterogeneous efficient dephosphorization agent adopts the technical scheme that the heterogeneous efficient dephosphorization agent consists of the following ingredients in percentage by weight: 5 percent to 13 percent of bauxite, 1 percent to 2.5 percent of clay, 40 percent to 60 percent of waste iron scales, 25 percent to 45 percent of limestone and 4 percent to 10 percent of binding agents. Waste iron scale powder is dried, and the moisture is removed; the dried waste iron scale powder, the clay, dolomite powder and bauxite powder are uniformly mixed according to the weight part proportion; the binding agents are added into the uniformly mixed materials; and ball pressing and drying are performed. The heterogeneous efficient dephosphorization agent and the preparing method have the advantages that the waste iron scale powder is fully used; the production cost is reduced; the environment is protected; phosphorus elements in molten iron can be effectively removed; the iron making cost is reduced; and meanwhile, the reduction of the cost of per ton of steel is also facilitated.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and specifically relates to a heterogeneous high-efficiency dephosphorization agent and its preparation process, in particular to the use of stirring energy generated by the drop of molten iron during the process of tapping and folding the molten iron in iron and steel plants. Create good kinetic conditions for the dephosphorization reaction of molten iron. This process is a new material added to the molten iron tank to improve the dephosphorization effect, promote the effective positive dephosphorization reaction, and remove phosphorus from the molten iron. Background technique [0002] Phosphorus is a harmful element in most steels, which has adverse effects on the surface quality, cracks, ductility, tensile strength, pitting corrosion resistance, stress corrosion resistance and welding performance of steel. The main source of phosphorus in molten iron is various raw materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
CPCY02P10/20
Inventor 谢磊王志英
Owner UNIV OF SCI & TECH LIAONING