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Anti-pulverization production technology of synthetic slag lotion

A production process and technology of slag lotion, which is applied in the anti-powdering production process field of synthetic slag lotion, can solve problems such as the reduction of effective components of CaO, the loss of active components of products, and the impact on desulfurization effect of products, so as to achieve less residual material and avoid Sphere volume expansion phenomenon, the effect of improving the operating environment of the site

Pending Publication Date: 2021-02-05
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, because slag lotion products generally contain a high proportion of active CaO, it will combine with the water added during the ball forming process or absorb moisture during storage, and a digestion reaction will occur to generate Ca(OH) 2 , not only the effective component of CaO decreases during use, which affects the desulfurization effect of the product, but also the digestion reaction generates Ca(OH) 2 The expansion of the volume causes a strong expansion stress in the sphere. If the bonding force of the materials in the sphere is not enough to offset the expansion stress, it will cause the sphere to pulverize and crack; The powdery material will disperse with the high-temperature air around the molten steel, which not only causes waste of materials, but also causes environmental pollution. After being absorbed by the human body, it will endanger human health; in addition, slag lotion products usually contain a certain proportion of reducing agents, of which Elemental Ca, CaC 2 Calcium-iron alloy, calcium carbide, aluminum powder and other raw materials are the main sources of ingredients such as calcium and Al, and they will also undergo digestion reactions when they come into contact with air, resulting in the loss of active ingredients of the product and the reduction of the use effect (desulfurization)
The composite slag lotion made by the above-mentioned technical scheme all has the above-mentioned problems to a large extent, and the preparation method of the above-mentioned composite slag lotion cannot well solve the occurrence of the above-mentioned problems

Method used

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  • Anti-pulverization production technology of synthetic slag lotion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Taking the synthetic slag washing material of a steel factory in Handan as an example, the chemical composition of the synthetic slag washing agent is calculated in parts by weight: 20-50 parts of activated lime, 20-40 parts of high-alumina bauxite clinker, 10-30 parts Part of AD powder, 5~15 parts of fluorite; Among them, the content of CaO in activated lime is ≥85%, the particle size is 0~3mm≥80%; the particle size of high alumina clinker is 0~3mm≥80%; CaF in stone 2 The content is ≥65%, and the particle size is 0~3mm≥80%.

[0048] refer to figure 1 , a kind of anti-powdering production process of synthetic slag lotion, comprises the following steps successively:

[0049] A. Raw material preparation: According to the granularity requirements of the raw materials in the product formula, sieve the activated lime, high alumina bauxite clinker and fluorite to the corresponding particle size, measure and screen the components of each raw material to ensure the CaO conten...

Embodiment 2

[0061] In the anti-powdering production process of the synthetic slag lotion described in this embodiment, the chemical composition of the synthetic slag lotion is the same as in Example 1, except that:

[0062] B. Drying: During the drying process, according to the original moisture content of each raw material, the feeding speed of the chain row dryer is controlled at 3 m / min, and the induced air temperature is controlled at 150°C, so that the moisture in each raw material after drying Mass percentage content <0.2%;

[0063] D. Stirring: According to the proportion of the above raw materials, according to the production tonnage of 1 ton each time, the computer batching system calculates the quality of each raw material, automatically controls the feeding and transports it to the closed mixing tank; each production is required Quality error <±5kg; according to product quality requirements, control the stirring time at 15 minutes;

[0064] F. Ball briquetting: When the materi...

Embodiment 3

[0086] Taking the composite slag washing material of a steel factory in Tangshan as an example, the chemical composition of the synthetic slag washing agent is calculated in parts by weight: 30-60 parts of sintering and refining slag, 10-20 parts of silicon-calcium alloy waste slag, 10-30 parts bauxite, 5~15 parts of industrial soda; the particle size of the above materials is 0~3mm≥90%; among them, the content of CaO in the premelted refining slag is ≥45%, Al 2 o 3 The content of [Ca] in silicon-calcium alloy waste residue is ≥ 38%, the content of [Si] is ≥ 20%, and the content of [Si] in bauxite is ≥ 20%. 2 o 3 content ≥ 65%.

[0087] refer to figure 1 , the anti-powdering production process of a synthetic slag lotion in this embodiment, the basic steps are the same as in Example 1, the difference is:

[0088] B. Drying: During the drying process, according to the original moisture content of each raw material, the feeding speed of the chain row dryer is controlled at 7 ...

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Abstract

The invention provides an anti-pulverization production technology of a synthetic slag lotion, and belongs to the technical field of metal smelting. The technology sequentially comprises the followingsteps of preparing, drying, feeding, stirring, conveying, ball pressing, screening, film attaching, airing and packaging. According to ball pressing, when materials to be conveyed are loaded in a buffering hopper of a ball pressing machine fully, the ball pressing machine begins to be started for pressing balls. According to screening, the extruded materials are all conveyed to a vibrating sieve,the screened materials are conveyed to the ball pressing machine, and circular pressing is carried out. According to film attaching, qualified balls on the sieve are conveyed to a sieve vibrating chute, spraying devices are arranged at the upper fixing position and the lower fixing position of the chute, and when the balls fall through the chute and pass through the spraying devices, and the spraying devices spray paraffin liquid to surfaces of balls. According to airing, the finished balls subjected to spraying are spread flatly and aired, and thus the paraffin liquid fully wets the surfacesof the balls and is solidified into films. According to the technology, the problems of occurrence of digestion reaction and ball pulverization can be effectively relieved, and the inventory period is prolonged.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to an anti-powdering production process of synthetic slag lotion. Background technique [0002] Synthetic slag lotion is a special proportion material added in the tapping process, most of which contain active CaO, Al 2 o 3 , reducing agent and other main components, can produce desulfurization, deoxidation, adsorption inclusions to molten steel, slag cleaning and purification of molten steel, and improve the quality of molten steel. [0003] After the synthetic slag detergent is added to the molten steel, it mainly relies on the active CaO to achieve the desulfurization effect on the molten steel. When the reaction reaches equilibrium, the sulfur in the molten steel can reach a lower level; Al 2 o 3 The main function is to increase the fluidity of the slag, and it also has the effect of adsorbing deoxidized products in the slag; the reducing agent is Ca, CaC ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064C21C7/06C21C7/076
CPCC21C7/06C21C7/0645C21C7/076Y02P10/20
Inventor 胡杰王金培黄征王勇源薛东磊
Owner HENAN TONGYU METALLURGY MATERIALS GRP
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