Method of preparing inorganic mineral fibre by smelting gangue and laterite-nickel ore by utilization of ore-smelting electric furnace

A technology of laterite nickel ore and submerged thermal electric furnace is applied in the field of comprehensive utilization of resources, and can solve the problems of low utilization value of coal gangue carbon, high production and operation cost, unstable fiber production, etc., so as to improve energy utilization efficiency and energy utilization efficiency. , the effect of improving operational stability

Active Publication Date: 2014-08-20
山西聚义宝鑫新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of this melting equipment and melting method is not easy to control, resulting in unstable fiber production, low heat utilization rate, heavy sulfur dioxide and smoke pollution
[0009] (2) The characteristics of technology and equipment lead to high production costs
[0010] This technology uses a blast furnace to melt coal gangue raw materials. In addition to the blast furnace body, it also needs a set of oxygen production system, flue gas desulfurization system and furnace body water circulation cooling system, which directly leads to excessive investment in equipment, high depreciation and maintenance costs and push up manufacturing costs; Furnace water circulation c

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The coal gangue in the semi-industrial test is coal gangue from a mining area of ​​Shanxi Juyi Industrial Group, with a fixed carbon content of 11.83% and an ash content of 80.63%, of which SiO2 is 64.71% and Al2O3 is 22.51%. The laterite nickel ore is ore from a certain place in Indonesia. The main components of the laterite nickel ore are: Ni 1.84%, Fe 15.52%, MgO 13.63%, SiO2 45.71%. In the test process of preparing inorganic mineral fibers from coal gangue, laterite nickel ore is used as a slag type regulator, and a certain amount of lime is added to smelt it in a submerged electric furnace, and the by-product nickel-iron alloy is produced while preparing fibers. Obtained better technical indicators.

[0038] The semi-industrial test uses a raw material ratio of coal gangue: laterite nickel ore: lime = 42:40:18, smelting and melting in a 1000KVA submerged thermal electric furnace for 4 hours; Insulation electric furnace, and then feed the centrifuge with a continuo...

Embodiment 2

[0041] The coal gangue in the semi-industrial test is the coal gangue of a coal mine in Shanxi Yangquan Mining Bureau, with a fixed carbon content of 13.06% and an ash content of 81.34%, of which SiO2 is 59.69% and Al2O3 is 21.61%. The laterite nickel ore is ore from a certain place in Indonesia. The main components of the laterite nickel ore are: Ni 1.84%, Fe 15.52%, MgO 13.63%, SiO2 45.71%. In the test process of preparing inorganic mineral fibers from coal gangue, laterite nickel ore was used as a slag type regulator, and a certain amount of lime was added to smelt it in a submerged thermal electric furnace, and the by-product nickel-iron alloy was produced at the same time as fiber making. This technical method was obtained. better technical indicators.

[0042] The semi-industrial test uses a raw material ratio of coal gangue: laterite nickel ore: lime = 42:42:16, smelting and melting in a 1000KVA submerged thermal electric furnace for 4 hours; Insulation electric furnac...

Embodiment 3

[0045] The coal gangue in the semi-industrial test is the coal gangue of a coal mine in Linfen Mining Bureau, Shanxi Province, with a fixed carbon content of 9.44% and an ash content of 78.67%, of which SiO2 is 67.31% and Al2O3 is 19.38%. The laterite nickel ore is ore from a certain place in Indonesia. The main components of the laterite nickel ore are: Ni 2.02%, Fe 14.33%, MgO 11.68%, SiO2 46.56%. In the test process of preparing inorganic mineral fibers from coal gangue, laterite nickel ore was used as a slag type regulator, and a certain amount of lime was added to smelt it in a submerged thermal electric furnace, and the by-product nickel-iron alloy was produced at the same time as fiber making. This technical method was obtained. better technical indicators.

[0046] The semi-industrial test uses a raw material ratio of coal gangue: laterite nickel ore: lime=40:40:20, smelting and melting in a 1000KVA submerged thermal electric furnace for 4 hours; Insulation electric f...

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Abstract

The invention relates to a method of preparing inorganic mineral fibre by smelting gangue and laterite-nickel ore by utilization of an ore-smelting electric furnace. The method is characterized in that: the laterite-nickel ore and lime are added into the gangue so that components of slag meet requirements of the inorganic mineral fibre; the gangue is smelted by the ore-smelting electric furnace after component adjustment and drying; by adjusting the secondary voltage and the electric current, the temperature and the viscosity of the slag are effectively controlled, and nickel and iron in the slag are reduced into a nickel iron alloy side product by utilizing fixed carbon in the smelting process as a reductant; an electric mantle heater is disposed between the ore-smelting electric furnace and a centrifugal fiber manufacturing machine; the slag and the nickel iron are discharged at fixed period during smelting of the ore-smelting electric furnace; and the slag flows into the electric mantle heater, and then is fed into the centrifugal fiber manufacturing machine continuously and at a constant flux from the electric mantle heater so as to prepare the inorganic mineral fibre. The nickel and the iron in the laterite-nickel ore are reduced by utilizing the fixed carbon in the gangue to produce the side product nickel iron alloy. The method has characteristics of high energy utilization rate in processes, low pollution, low operation cost, and good economic and social benefit.

Description

technical field [0001] The invention relates to a method for preparing inorganic mineral fibers, in particular to a method for preparing mineral fibers by melting coal gangue and laterite nickel ore in a submerged heat electric furnace. In the present invention, coal gangue is used as the main raw material for preparing inorganic mineral fibers, mixed with laterite nickel ore in an appropriate proportion, used as a conductive medium to meet electric furnace smelting conditions, and at the same time used as a material for adjusting fiber components, so that the molten slag components meet the requirements of inorganic mineral fiber components. . During the two-component smelting process, the fixed carbon in coal gangue is used to reduce nickel and iron in laterite nickel ore, and high value-added nickel-iron alloy by-products are produced, which realizes comprehensive utilization of beneficial components in coal gangue and laterite nickel ore, and significantly improves Econom...

Claims

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Application Information

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IPC IPC(8): C03B37/04C22B4/06
CPCY02P40/57
Inventor 王殿辉尹文新赵景富孙镇宋向荣
Owner 山西聚义宝鑫新材料有限公司
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