CN104327799B

CN104327799B - The preparation method of high-iron bauxite roasted ore strengthening ore grinding grinding aid

Info

Publication number: CN104327799B
Application number: CN201410535633.2A
Authority: CN
Inventors: 胡文韬; 王化军; 刘欣伟
Original assignee: 北京科技大学
Priority date: 2014-10-11
Filing date: 2014-10-11
Publication date: 2016-06-15
Also published as: CN104327799A

Abstract

The preparation method that the present invention provides a kind of high-iron bauxite roasted ore strengthening ore grinding grinding aid, relates to Mineral Processing Engineering field, to solve the problem that existing grinding aid is not suitable for the strengthening grinding process of roasted ore. By percentage to the quality, comprising the steps: mixing pre-grinding, heat treatment separates, and adds quick lime and dehydrated alcohol grinds altogether, adds glycerol and prepares grinding aid. The present invention is in order to improve the grinding efficiency of high-iron bauxite roasted ore.

Description

The preparation method of high-iron bauxite roasted ore strengthening ore grinding grinding aid

Technical field

The present invention relates to Mineral Processing Engineering field, the preparation method particularly relating to a kind of high-iron bauxite roasted ore strengthening ore grinding grinding aid.

Background technology

Roasting (or direct-reduction) technology is the high-iron bauxite processing method of rising in recent years. Obtain through roasting that " roasted ore " hardness is big, grindability is poor, use grinding aid can be effectively improved grinding efficiency. Selecting or preparing grinding aid is the key factor realizing high-iron bauxite roasted ore " strengthening ore grinding ". Existing grinding aid is mainly used in cement and raw ore grinding aid, is not suitable for roasted ore. Chinese invention patent CN101955330B discloses a kind of polycarboxylic acid-alcohol amine polymer grinding aid and preparation method thereof, and formula is: RCOONH (CH₂CH₂OH)₃. Raw material is methacrylic acid, poly glycol monomethyl ether, methylpropene sodium sulfonate, triethanolamine, for cement. Chinese invention patent CN03132427.4 discloses a kind of cement grinding aid and production technology thereof, add activation processing liquid after being crushed by humic acids and carry out activation processing, preliminary hydro-extraction is also dried, flyash is dried simultaneously, and add triethanolamine mixing, the mixture of drying object and flyash and triethanolamine is mixed and made into cement grinding aid uniformly, for cement. Chinese invention patent CN102660225A discloses a kind of ilmenite grinding aid and preparation method, with maleic anhydride, triethanolamine, acrylic acid mixture for raw material, with peroxide for initiator, stir 2～3 hours at 60～80 DEG C, prepare after alcohols solvent is then distilled off. This invention can increase the mobility of material, improves the attrition grinding efficiency of ilmenite effective component extraction rate and equipment. As can be seen here, existing grinding aid is mainly used in cement and Ore grinding aid, and owing to using object and the mechanism of action all different, its chemical composition and physicochemical property are not suitable for the strengthening grinding process of high-iron bauxite roasted ore.

The present invention is the preparation method of a kind of high-iron bauxite roasted ore (calling " roasted ore " in the following text) strengthening ore grinding grinding aid, and the grinding aid related to is processed into by the material such as sodium hydroxide, sodium carbonate. Roasted ore is the product after the mixing of materials roastings such as a kind of high-iron bauxite, coal, flux, and sintering is serious, hardness is big, uses grinding aid can be effectively improved its grinding efficiency. Grinding aid adds grinding machine in grinding process, plays strengthening ore grinding and the effect of ore pulp adjustment, is conducive to dissolution aluminium oxide simultaneously. It is characterized in that using the alkaline hydrophilic compound treatment roasted ore containing sodium, be but not directly used for the raw ore of bauxite. By the form dissolution with aluminum soluble salt of the most aluminum after ore grinding, ferrum, slag is conducive to separate.

Summary of the invention

The preparation method that the technical problem to be solved in the present invention is to provide a kind of high-iron bauxite roasted ore strengthening ore grinding grinding aid, to solve the problem that existing grinding aid is not suitable for the strengthening grinding process of roasted ore.

For solving above-mentioned technical problem, the preparation method that the embodiment of the present invention provides a kind of high-iron bauxite roasted ore strengthening ore grinding grinding aid, by percentage to the quality, comprise the steps:

Mixing pre-grinding, by the sodium carbonate of 60～95%, 0.1～30.2% sodium hydroxide, is milled to < 0.038mm after the mixing of 0.1～10.8% sodium sulfate and 1～30% sodium bicarbonate in advance;

Heat treatment separates, and will be milled to<mixed-powder of 0.038mm is placed in 80～200 DEG C of heat-treatment furnaces, takes out caking, cooling, isolate therein after keeping constant temperature 0.5～3h>6mm granule in advance;

Add quick lime and dehydrated alcohol to grind altogether,>6mm granule adds 3～6% quick lime and 2.5～4.5% dehydrated alcohol, mixing is also milled to that<0.045mm, is evaporated ethanol and prepares powder altogether;

Add the prepared grinding aid of glycerol, powder is mixed according to mass ratio 100:28.5～40 at 75～85 DEG C with glycerol, prepare grinding aid, and seal preservation with mastic or solution form.

Wherein, described sodium carbonate, described sodium hydroxide, described sodium sulfate and described sodium bicarbonate are solid-state.

Wherein, described heat treatment separating step is isolated<granule of 6mm return reaction in heat-treatment furnace until fully sintered (granule>6mm).

Wherein, described interpolation glycerol prepares the grinding aid prepared in grinding aid step and seals preservation with paste.

Wherein, described interpolation glycerol prepares the grinding aid prepared in grinding aid step and seals preservation in the form of a solution.

Having the beneficial effect that of the technique scheme of the present invention:

In such scheme, add grinding aid by the roasted ore in ore mill, serve strengthening ore grinding and adjust the effect of ore pulp, being conducive to alumina leaching, be conducive to ferrum, slag to separate, be effectively increased roasted ore grinding efficiency.

Accompanying drawing explanation

Fig. 1 is the preparation technology flow chart of the embodiment of the present invention;

Fig. 2 is the using method of the paste grinding aid of the embodiment of the present invention;

Fig. 3 is the using method of the liquid form grinding aid of the embodiment of the present invention.

Detailed description of the invention

For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, it is described in detail below in conjunction with the accompanying drawings and the specific embodiments.

The present invention is directed to the problem that existing grinding aid is not suitable for the strengthening grinding process of roasted ore, it is provided that the preparation method of a kind of high-iron bauxite roasted ore strengthening ore grinding grinding aid.

As it is shown in figure 1, the preparation method of a kind of high-iron bauxite roasted ore provided by the invention strengthening ore grinding grinding aid, by percentage to the quality, comprise the steps:

S1, mixing pre-grinding, by the sodium carbonate of 60～95%, 0.1～30.2% sodium hydroxide, be milled to < 0.038mm after the mixing of 0.1～10.8% sodium sulfate and 1～30% sodium bicarbonate in advance;

S2, heat treatment separate, and will be milled to<mixed-powder of 0.038mm is placed in 80～200 DEG C of heat-treatment furnaces, takes out caking, cooling, isolate therein after keeping constant temperature 0.5～3h>6mm granule in advance;

S3, add quick lime and dehydrated alcohol and grind altogether,>6mm granule adds 3～6% quick lime and 2.5～4.5% dehydrated alcohol, mixing is also milled to that<0.045mm, is evaporated ethanol and prepares powder altogether;

S4, interpolation glycerol prepare grinding aid, are mixed according to mass ratio 100:28.5～40 at 75～85 DEG C with glycerol by powder, prepare grinding aid, and sealing preserves.

Wherein, described sodium carbonate, described sodium hydroxide, described sodium sulfate and described sodium bisulfate are solid-state.

Wherein, as in figure 2 it is shown, described grinding aid grinds altogether with paste addition roasted ore.

Wherein, as it is shown on figure 3, described grinding aid adds grinding machine in the form of a solution and grinds altogether with roasted ore.

Wherein, described roasted ore is the product after the mixing of materials roasting cakings such as high-iron bauxite, coal, flux.

Embodiment 1

The roasted ore of somewhere, Guangxi high-iron bauxite is used the present invention, to join 3.5% grinding aid outside paste. Practice have shown that, after adding grinding aid, the ore grinding time significantly shortens, and dissolution fluid quality is also improved. Compared with the material not using grinding aid, grinding efficiency height, energy consumption be low, high quality to use this grinding aid to have.

The present invention is tested by ore grinding, it is first determined the optimum proportioning value of the various component of roasting high-iron bauxite grinding aid is as follows: sodium carbonate 82%, sodium hydroxide 0.4%, sodium sulfate 9.81%, sodium bicarbonate 7.79%. By being milled in advance after the mixing of each component,<0.038mm, is placed in 100 DEG C of heat-treatment furnaces after constant temperature 2h and takes out caking; Cooling, isolates therein>6mm granule; Add the quick lime of mass fraction 5% and 4% dehydrated alcohol at granule and be milled to that<0.045mm, is evaporated ethanol altogether; Prepared powder and glycerol are mixed according to mass ratio 100:40 at 75 DEG C and seal preservation; Ore milling concentration 20%; Add with paste; Mog:<0.045mm accounts for 83%.

Beneficial effect of the present invention shows: use this roasting high-iron bauxite grinding aid, it is possible to making the ore grinding time of roasted ore reduce about 30%, the particle size range of ore grinding product is narrower, and granule ratio is more uniform. Meanwhile, the material time of staying in ore pulp reduces 25%, and the dissolution rate of noxious products reduces about 15%, improves the quality of product.

Embodiment 2

To Henan high-iron bauxite roasted ore, the grinding aid accounting for roasted ore quality 2.2% is formulated as the solution that concentration is 10% and adds. Compared with the material not using grinding aid, the ore grinding time is greatly decreased, energy consumption reduces, product quality improves to use this grinding aid to have.

Grinding aid optimum proportioning value suitable in this roasted ore is as follows: sodium carbonate 73%, sodium hydroxide 5.3%, sodium sulfate 8.23%, sodium bicarbonate 13.47%, is milled to<0.038mm in advance after each component being mixed; It is placed in 180 DEG C of heat-treatment furnaces after constant temperature 1.5h and takes out caking; Cooling, isolates therein>6mm granule; Add mass fraction 3% quick lime and 3.5% dehydrated alcohol at granule and be milled to that<0.045mm, is evaporated ethanol altogether; Prepared powder and glycerol are mixed according to mass ratio 100:40 at 80 DEG C and seal preservation; Grinding aid is configured to 10% solution add; Ore milling concentration 35%; Mog:<0.045mm accounts for 56%.

Beneficial effect of the present invention shows: making the ore grinding time of roasted ore reduce by 33.78%, the viscosity of ore pulp significantly reduces, and ore discharge is smooth and easy, and the granule of ore grinding product also ratio is more uniform. Meanwhile, the material time of staying in ore pulp reduces, and the dissolution rate of noxious products reduces about 25%, and the dissolution rate of product aluminium oxide improves 4.5%, and purity improves a grade.

Embodiment 3

For the south of Guizhou Province high-iron bauxite roasted ore, after joining 3% grinding aid outside paste, with compared with grinding aid, degree of dissociation of mineral monomer significantly improves, energy consumption reduces, product quality also makes moderate progress.

Optimum proportioning value suitable in this various component of roasted ore grinding aid is as follows: sodium carbonate 60%, sodium hydroxide 22.2%, sodium sulfate 7.2%, sodium bicarbonate 10.6%. By being milled in advance after the mixing of each component,<0.038mm, is placed in 120 DEG C of heat-treatment furnaces after constant temperature 2h and takes out caking; Cooling, isolates therein>6mm granule; Add mass fraction 3.5% quick lime and 3.5% dehydrated alcohol at granule and be milled to that<0.045mm, is evaporated ethanol altogether; Prepared powder and glycerol are mixed according to mass ratio 100:40 at 80 DEG C and seal preservation; Ore milling concentration 32%; Mog:<0.045mm accounts for 95%.

Beneficial effect of the present invention shows: using this roasting high-iron bauxite grinding aid to process Guizhou high-iron bauxite roasted ore, the most significant effect includes: makes the ore grinding time of roasted ore reduce by 21.2%, significantly improves grinding efficiency; After ore grinding, the monomer dissociation degree of product is greatly improved; The material time of staying in ore pulp reduces 41% simultaneously; Harmful constituent dissolution rate in roasted ore decreases 5.3%, also slightly reduces.

Embodiment 4

High-iron bauxite roasted ore to somewhere, Southeast Asia, after joining 2% grinding aid outside paste, compared with when not using grinding aid, aluminum, iron mineral monomer dissociation degree have raising in various degree, dissolution fluid siliceous modulus also increases.

Grinding aid best composition suitable in this roasted ore is as follows: sodium carbonate 90.7%, sodium hydroxide 0.2%, sodium sulfate 7.2%, sodium bicarbonate 1.9%. By being milled in advance after the mixing of each component,<0.038mm, is placed in 105 DEG C of heat-treatment furnaces after constant temperature 1h and takes out caking; Cooling, isolates therein>6mm granule; Add mass fraction 3% quick lime and 4.5% dehydrated alcohol at granule and be milled to that<0.045mm, is evaporated ethanol altogether; Prepared powder and glycerol are mixed according to mass ratio 100:33 at 85 DEG C and seal preservation; Ore milling concentration 37%; Mog:<0.045mm accounts for 94%.

The above is the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from principle of the present invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.

Claims

1. the preparation method of a high-iron bauxite roasted ore strengthening ore grinding grinding aid, it is characterised in that by percentage to the quality, comprise the steps:

Add glycerol and prepare grinding aid, powder is mixed according to mass ratio 100:28.5～40 at 75～85 DEG C with glycerol, prepare grinding aid, seal and preserve;

2. the preparation method of high-iron bauxite roasted ore according to claim 1 strengthening ore grinding grinding aid, it is characterised in that isolate<granule of 6mm returns reaction in heat-treatment furnace until fully sintered, granule>6mm in described heat treatment separating step.

3. the preparation method of high-iron bauxite roasted ore according to claim 1 strengthening ore grinding grinding aid, it is characterised in that described interpolation glycerol prepares the grinding aid prepared in grinding aid step and seals preservation with paste.

4. the preparation method of high-iron bauxite roasted ore according to claim 1 strengthening ore grinding grinding aid, it is characterised in that described interpolation glycerol prepares the grinding aid prepared in grinding aid step and seals preservation in the form of a solution.