阅读说明：本技术 一种利用湿法冶金红土镍矿的浸出渣制备矿物棉纤维的方法及其应用 (Method for preparing mineral cotton fiber by using leaching residues of hydrometallurgy laterite nickel ore and application of mineral cotton fiber ) 是由 曲景奎 王腾跃 张萌 于 2019-01-15 设计创作，主要内容包括：本发明公开了一种利用湿法冶金红土镍矿的浸出渣制备矿物棉纤维的方法及其应用,所述方法为：以湿法冶金红土镍矿的浸出渣为原料,在原料中添加调制剂,常温固态混合调制使酸度系数≥1.2,然后将混料熔融、出料、成丝得到矿物棉纤维；或,以湿法冶金红土镍矿的浸出渣为原料,将原料熔融、出料、成丝得到矿物棉纤维。该方法可减少固废,降低环境污染,用于制备岩棉,提高建筑隔热保温性能,提高能源利用率,降低能耗。(The invention discloses a method for preparing mineral wool fibers by utilizing leaching residues of hydrometallurgical laterite-nickel ore and application thereof, wherein the method comprises the following steps: leaching slag of hydrometallurgy laterite-nickel ore is taken as a raw material, a modulating agent is added into the raw material, the raw material and the modulating agent are mixed and modulated at normal temperature and in a solid state, so that the acidity coefficient is more than or equal to 1.2, and then the mixed material is melted, discharged and filamentized to obtain mineral wool fiber; or, the leaching slag of the hydrometallurgy laterite-nickel ore is taken as a raw material, and the raw material is melted, discharged and filamentized to obtain the mineral cotton fiber. The method can reduce solid waste and environmental pollution, is used for preparing rock wool, improves the heat insulation performance of buildings, improves the energy utilization rate and reduces energy consumption.)

1. A method for preparing mineral wool fibers by utilizing leaching residues of hydrometallurgy laterite-nickel ore comprises the following steps:

leaching slag of hydrometallurgy laterite-nickel ore is taken as a raw material, a modulating agent is added into the raw material, the raw material and the modulating agent are mixed and modulated at normal temperature and in a solid state, so that the acidity coefficient is more than or equal to 1.2, and then the mixed material is melted, discharged and filamentized to obtain mineral wool fiber;

or the like, or, alternatively,

the leaching slag of the hydrometallurgy laterite nickel ore is taken as a raw material, and the raw material is melted, discharged and filamentized to obtain the mineral wool fiber.

2. The method according to the claim 1, characterized in that the leached slag of hydrometallurgical lateritic nickel ores is leached slag obtained by leaching lateritic nickel ores with hydrochloric acid or leached lateritic nickel ores with sulfuric acid.

3. The method according to the claim 1, characterized in that the lateritic nickel ore is one or both of serpentine type lateritic nickel ore, limonite type lateritic nickel ore.

4. The method according to claim 1, wherein the conditioning agent is one or more of basalt, coal gangue, limestone, dolomite, bauxite, magnesium oxide, calcium oxide, aluminum oxide, silicon oxide, iron oxide, sodium oxide, potassium oxide, and iron slag.

5. The method according to claim 1, wherein the size of the leaching residue and the size of the powder of the preparation are both 0.1 to 20000 μm.

6. The method of claim 1, wherein the acidity index is in the range of 1.2-2.5.

7. The process according to claim 1, wherein the temperature of the melt is 1200 ℃ or higher.

8. The method of claim 1, wherein the filamentation is selected from one or both of four-roll centrifugal filamentation or blown filamentation.

9. Use of mineral wool fibres produced according to claim 1 for the production of mineral wool boards and granulated wool.

10. Use according to claim 9, characterized in that mineral wool fibres are provided with binders, laid, pressed, cured and cut to form mineral wool boards.

Technical Field

The invention relates to the technical field of mineral wool production, in particular to a method for preparing mineral wool by utilizing hydrometallurgy laterite-nickel ore leaching residues.

Background

In the mineral smelting industry, both hydrometallurgy and pyrometallurgy inevitably produce a large amount of solid waste, namely slag. In the patent 'a method for selectively leaching serpentine type laterite-nickel ore by using hydrochloric acid' (application number: 201510007547.9), about 0.6 ton of leaching residue is solid waste per ton of laterite-nickel ore. If the leached slag is reasonably utilized to manufacture rock wool finished products, on one hand, the pollution of solid waste to the environment can be reduced, on the other hand, the rock wool can play a role in heat preservation when being applied to buildings, and the energy utilization rate is improved. Some researches have been carried out on the preparation of mineral wool from slag obtained by pyrometallurgical treatment of lateritic nickel ores, and some technological breakthroughs have been made, such as "a method of melting steel slag into minerals in the process of converter steel" (201711500635.8), a "method of preparing mineral wool" (application No. 201210592611.0), a "system of preparing hot slag mineral wool in blast furnace" (application No. 201410400161X), and the like, which make full use of sensible heat in the pyrometallurgical slag to prepare mineral wool. However, the method requires that the slag is added with the modifier in a high-temperature state, and the slag has high viscosity, so that the materials are not uniformly mixed after the materials are added, and the quality of the finished product of the mineral wool is uneven. In order to improve the quality of mineral wool, the invention researches that the leaching slag obtained by wet metallurgy is added with additives in a normal-temperature powder state, and the mixture is added into a high-temperature furnace for melting after being uniformly mixed, so that the components of the molten liquid are uniform, and the product quality of the mineral wool is improved.

Disclosure of Invention

The invention aims to provide a method for preparing mineral wool fibers by utilizing leaching residues of hydrometallurgical laterite-nickel ore, which can reduce solid waste and environmental pollution, is used for preparing rock wool, improves the heat insulation performance of buildings, improves the energy utilization rate and reduces the energy consumption.

The invention provides a feasible method for uniformly mixing the additive and the leaching slag and improving the quality of rock wool products.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for preparing mineral wool fibers by utilizing leaching residues of hydrometallurgy laterite-nickel ore comprises the following steps:

leaching slag of hydrometallurgy laterite-nickel ore is taken as a raw material, a modulating agent is added into the raw material, the raw material and the modulating agent are mixed and modulated at normal temperature and in a solid state, so that the acidity coefficient is more than or equal to 1.2, and then the mixed material is melted, discharged and filamentized to obtain mineral wool fiber;

or the like, or, alternatively,

the leaching slag of the hydrometallurgy laterite nickel ore is taken as a raw material, and the raw material is melted, discharged and filamentized to obtain the mineral wool fiber.

Preferably, the acidity factor is in the range of 1.2-2.5.

Preferably, the temperature of the melt is 1200 ℃.

The invention also provides the use of mineral wool fibres in the production of mineral wool boards and granulated wool.

The mineral wool is prepared by the following method: adding a binder into mineral wool fibers, paving, pressing, curing and cutting to form the mineral wool board.

The invention prepares the mineral wool by using the laterite-nickel ore leaching slag obtained by hydrometallurgy. The method takes leaching slag as a base material, the raw material is modulated with or without a modulating agent, but the acidity coefficient is ensured to be more than or equal to 1.2, the mixed material is melted at the temperature of 1300-1900 ℃, and a four-roller centrifuge or blowing equipment is used for preparing high-quality mineral wool. The specific implementation case is operated according to the following process flow:

leaching slag → modulation → mixing → melting → filamentation → pressing cotton → solidification → cutting → mineral wool board.

In one embodiment of the invention, the obtained leaching slag is hydrometallurgy laterite-nickel ore leaching slag, including leaching slag obtained by leaching laterite-nickel ore with hydrochloric acid or leaching slag obtained by leaching laterite-nickel ore with sulfuric acid.

In one embodiment of the invention, the leaching residue of the hydrometallurgy laterite nickel ore can be directly melted at high temperature without adding a modulator, the leaching residue is melted at the temperature of not less than 1500 ℃, preferably 1500-1800 ℃, and the mineral cotton is prepared by a four-roller centrifuge or blowing equipment.

In one embodiment of the present invention, the leaching residue may be mixed with a preparation, which includes but is not limited to one or more of basalt, coal gangue, limestone, dolomite, bauxite, magnesia, calcium oxide, alumina, silica, iron oxide, sodium oxide, potassium oxide, iron slag, etc. The leaching slag and the modulating agent are mixed according to a certain mass ratio (10-50%) by adopting a vertical mixer or a horizontal mixer, the mixture is put into a high-temperature furnace for melting after being uniformly mixed, the temperature is not lower than 1200 ℃, the melting is preferably carried out under the condition of 1400 ℃ plus material 1600 ℃, then the filaments are prepared by a four-roller centrifuge or blowing equipment, and then the filaments are solidified and cut into the mineral wool board.

In one embodiment of the invention, the size of the above-mentioned preparation and extract powder is 0.1-20000 μm, and the smaller the size of the material, the more uniform the material is mixed. Therefore, the uniformity of components can be kept when the materials are melted, and the rock wool with stable performance is formed.

In one embodiment of the invention, in order to ensure no pollution to the environment and realize zero solid-liquid-gas emission, the invention adopts an advanced high-temperature furnace to melt samples. Including but not limited to cupola furnace, electric arc furnace, natural gas furnace, frequency conversion furnace, the cupola furnace tail gas discharge is treated by desulfurization and denitrification; the electric arc furnace adopts an electric arc heating mode and has no waste gas discharge; the fuel adopted by the natural gas furnace is clean energy and is discharged into water and carbon dioxide; the medium-frequency induction furnace generates heat in an electromagnetic induction mode and has no pollution.

In one embodiment of the invention, the leached slag is melted and then prepared into filaments by a four-roll centrifuge or a blowing device. The means that can be used for producing the filaments are not particularly limited. The technology of making filaments is now well established and those skilled in the art will appreciate that any known filament making method and apparatus are within the scope of the present invention. According to an embodiment of the present invention, the above-mentioned filament forming method is at least one of centrifugation and blowing.

In one embodiment of the invention, the mineral wool board finished product is formed by a cotton collector, a cotton conveyer, a pendulum machine, a pleating press, a curing oven and a cutting machine. Similarly, it will be appreciated by those skilled in the art that any known method and apparatus for making rock wool panels is within the scope of the invention.

Drawings

FIG. 1 is a flow chart for preparing mineral wool fibers by utilizing leaching residues of hydrometallurgical laterite-nickel ores;

FIG. 2 is a temperature-viscosity curve according to example 4 of the present invention.

Detailed Description

Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. Unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features. The description is only for the purpose of facilitating understanding of the present invention and should not be construed as specifically limiting the present invention.

The invention is described in further detail below with reference to the figures and the detailed description.