CN104072161A - Method for preparing calcium and magnesium sand by using high-silicon magnesite tailings - Google Patents
Method for preparing calcium and magnesium sand by using high-silicon magnesite tailings Download PDFInfo
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- CN104072161A CN104072161A CN201410256331.1A CN201410256331A CN104072161A CN 104072161 A CN104072161 A CN 104072161A CN 201410256331 A CN201410256331 A CN 201410256331A CN 104072161 A CN104072161 A CN 104072161A
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- magnesite
- calcium
- tailings
- deironing
- desiliconization
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Abstract
The invention discloses a method for preparing calcium and magnesium sand by using high-silicon magnesite tailings. A finished product of calcium and magnesium sand is prepared from magnesite tailings through the following steps of: deironing; desilicating; mixing; grinding; compression molding; drying; calcining, wherein the magnesite tailings are generated in the separation and purification processes of magnesite. The calcium and magnesium sand is prepared by mixing magnesite concentrate with high-calcium magnesite tailings instead of dolomite and calcining at one step. Compared with the prior art, the method has the beneficial effects that the calcium and magnesium sand is prepared by mixing the magnesite concentrate with the high-calcium magnesite tailings instead of the dolomite and calcining at one step, so that the process step of sintering is omitted, the energy can be remarkably saved, and the cost can be effectively reduced; meanwhile, waste tailings are effectively utilized, so that the pollution is reduced, the energy is saved, and the aims of saving energy and reducing emission are achieved. In addition, the method is simple in process and capable of reducing the labor intensity.
Description
Technical field
After the present invention relates to magnesite choosing, mine tailing is recycled field, relates in particular to the method that the rear mine tailing of a kind of magnesite choosing is prepared calcium magnesia sand.
Background technology
At present, the refractory materials that in Clean Steel production technique, total alkali ladle and tundish use is mainly magnesium calcium series refractory material, because it has the stability under good high thermal resistance, slag resistance, resistance to heat shocks, high-temperature vacuum, there is the function such as the removal of impurity, cleaning molten steel simultaneously, can meet modern longevity of smelting, the requirement such as pollution-free, energy-conservation, therefore be widely applied on Clean Steel Smelting thermal technology container inside lining.
But at present, produce magnesium calcium series refractory material and generally adopt secondary clacining synthetic method, the rhombspar adding, need to be through 1000 DEG C light-burned, complex process, cost is higher.Wherein main component rhombspar exploitation and sintering process vegetation destruction, waste energy, contaminate environment.
Summary of the invention
The object of the present invention is to provide a kind of high silicon magnesite tailings to prepare the method for calcium magnesia sand, through deironing desiliconization, batching, batch mixing, abrasive material, compression moulding, oven dry, calcining step, the magnesite tailings that forms high calcium is used for replacing rhombspar, mix with magnesite concentrate through one-step calcination manufacture calcium magnesia sand, mine tailing after magnesite choosing is made to calcium magnesia sand finished product.
For achieving the above object, the present invention realizes by the following technical solutions:
High silicon magnesite tailings is prepared the method for calcium magnesia sand, and calcic magnesite tailings, through deironing desiliconization, batching, batch mixing, abrasive material, compression moulding, oven dry, once calcining, is made to calcium magnesia sand finished product, and concrete operation step is as follows:
1) deironing desiliconization
Tailings Slurry after magnesite choosing is sent into flotation machine, add flotation agent to carry out reverse flotation deironing desiliconization;
2) batching
The each component raw material of calcium magnesia sand is as follows by weight ratio:
70～80 parts, magnesite concentrate;
20～30 parts of high calcium magnesite mine tailings after deironing desiliconization;
MgO content >=98% in wherein said magnesite concentrate, granularity≤15mm;
CaO content >=20% in high calcium magnesite mine tailing after wherein said deironing desiliconization;
3) batch mixing
The raw material of preparing calcium magnesia sand is fully mixed in sand mill by above-mentioned umber, and mixing time is 4～9 minutes;
4) abrasive material
The material mixing is carried out to fine grinding, the raw material of granularity between-200 order～300 orders reached more than 90%;
5) compression moulding
The material mixing is sent into ball press, under the pressure of>=130MPa, be pressed into the pelletizing that diameter is 45～55mm, density is 1.9g-2.35g/cm
3;
6) dry
Pelletizing after compression moulding is put into dry kiln, and be 96～120 hours time of drying;
7) calcining
Dried pelletizing is sent into shaft furnace calcining, and calcining temperature is between 1650～1800 DEG C, and calcination atmosphere is oxidizing atmosphere, and calcination time is 25～30 minutes, finally makes calcium magnesia sand finished product.
Described step 1) in flotation agent be Sodium hexametaphosphate 99, sodium oleate.
2, compared with prior art, the invention has the beneficial effects as follows:
Utilize mine tailing to replace rhombspar, just can manufacture calcium magnesia sand through one-step calcination, fuel saving significantly, effectively reduces costs, effectively utilizes discarded tailing, minimizing pollution, energy-saving and emission-reduction.Technique is simple simultaneously, reduces labour intensity.
Embodiment
Below the specific embodiment of the present invention is further illustrated:
Embodiment 1:
The calcium magnesia sand that the present embodiment is produced, main raw material is magnesite concentrate and magnesite tailings, magnesite tailings adopts multistage multistage sorting method, and mine tailing after magnesite choosing is carried out to deironing desiliconization, CaO content >=20% in the magnesite tailings after choosing; Then through deironing desiliconization, batching, batch mixing, abrasive material, compression moulding, oven dry, once calcining, make calcium magnesia sand finished product.The formula material of this product carries out proportioning by following umber:
70 parts, magnesite concentrate;
30 parts of high calcium magnesite mine tailings after deironing desiliconization;
MgO content >=98% in magnesite concentrate;
CaO content >=20% in high calcium magnesite mine tailing after deironing desiliconization;
Production process of the present invention is as follows:
First the Tailings Slurry after magnesite choosing is sent into flotation machine, add Sodium hexametaphosphate 99, sodium oleate flotation agent to carry out reverse flotation deironing desiliconization; Then according to after said ratio batching, the raw material of preparing calcium magnesia sand is fully mixed in sand mill by above-mentioned umber, mixing time is 4 minutes; The material mixing is carried out to fine grinding, granularity 200 object raw materials are reached more than 90%; The raw material mixing is sent into ball press, be pressed into the pelletizing that diameter is 45mm under the pressure of 135MPa, density is 2g/cm
3; Then the pelletizing after compression moulding is put into dry kiln, be 96 hours time of drying; Finally dried pelletizing is sent into shaft furnace calcining, calcining temperature is 1650 DEG C, and calcination time is 25 minutes, finally makes calcium magnesia sand finished product.
Embodiment 2:
The calcium magnesia sand that the present embodiment is produced, main raw material is magnesite concentrate and magnesite tailings, magnesite tailings adopts multistage multistage sorting method, and mine tailing after magnesite choosing is carried out to deironing desiliconization, CaO content >=20% in the magnesite tailings after choosing; Then pass through batch mixing, abrasive material, compression moulding, oven dry, calcining step, make calcium magnesia sand finished product.The formula material of this product carries out proportioning by following umber:
75 parts, magnesite concentrate;
25 parts of high calcium magnesite mine tailings after deironing desiliconization;
MgO content >=98% in magnesite concentrate;
CaO content >=20% in high calcium magnesite mine tailing after deironing desiliconization;
Production process of the present invention is as follows:
First the Tailings Slurry after magnesite choosing is sent into flotation machine, add Sodium hexametaphosphate 99, sodium oleate flotation agent to carry out reverse flotation deironing desiliconization; Then according to after said ratio batching, the raw material of preparing calcium magnesia sand is fully mixed in sand mill by above-mentioned umber, mixing time is 6 minutes; The material mixing is carried out to fine grinding, granularity is reached more than 90% at 300 object materials; The material mixing is sent into ball press, be pressed into the pelletizing that diameter is 50mm under the pressure of 140MPa, density is 2.1g/cm
3; Then the pelletizing after compression moulding is put into dry kiln, be 108 hours time of drying; Finally dried pelletizing is sent into shaft furnace calcining, calcining temperature is 1700 DEG C, and calcination time is 28 minutes, finally makes calcium magnesia sand finished product.
Embodiment 3:
The calcium magnesia sand that the present embodiment is produced, main raw material is magnesite concentrate and magnesite tailings, magnesite tailings adopts multistage multistage sorting method, and mine tailing after magnesite choosing is carried out to deironing desiliconization, CaO content >=20% in the magnesite tailings after choosing; Then pass through batch mixing, abrasive material, compression moulding, oven dry, calcining step, make calcium magnesia sand finished product.The formula material of this product carries out proportioning by following umber:
80 parts, magnesite concentrate;
20 parts of high calcium magnesite mine tailings after deironing desiliconization;
MgO content >=98% in magnesite concentrate;
CaO content >=20% in high calcium magnesite mine tailing after deironing desiliconization;
Production process of the present invention is as follows:
First the Tailings Slurry after magnesite choosing is sent into flotation machine, add Sodium hexametaphosphate 99, sodium oleate flotation agent to carry out reverse flotation deironing desiliconization; Then according to after said ratio batching, the raw material of preparing calcium magnesia sand is fully mixed in sand mill by above-mentioned umber, mixing time is 9 minutes; The material mixing is carried out to fine grinding, granularity is reached more than 90% at 200 object materials; The material mixing is sent into ball press, be pressed into the pelletizing that diameter is 54mm under the pressure of 135MPa, density is 2.3g/cm
3; Then the pelletizing after compression moulding is put into dry kiln, be 120 hours time of drying; Finally dried pelletizing is sent into shaft furnace calcining, calcining temperature is 1800 DEG C, and calcination time is 30 minutes, finally makes calcium magnesia sand finished product.
Claims (2)
1. high silicon magnesite tailings is prepared the method for calcium magnesia sand, and calcic magnesite tailings, through deironing desiliconization, batching, batch mixing, abrasive material, compression moulding, oven dry, once calcining, is made to calcium magnesia sand finished product, it is characterized in that, concrete operation step is as follows:
1) deironing desiliconization
Tailings Slurry after magnesite choosing is sent into flotation machine, add flotation agent to carry out reverse flotation deironing desiliconization;
2) batching
The each component raw material of calcium magnesia sand is as follows by weight ratio:
70～80 parts, magnesite concentrate;
20～30 parts of high calcium magnesite mine tailings after deironing desiliconization;
MgO content >=98% in wherein said magnesite concentrate, granularity≤15mm;
CaO content >=20% in high calcium magnesite mine tailing after wherein said deironing desiliconization;
3) batch mixing
The raw material of preparing calcium magnesia sand is fully mixed in sand mill by above-mentioned umber, and mixing time is 4～9 minutes;
4) abrasive material
The material mixing is carried out to fine grinding, the material of granularity between-200 order～300 orders reached more than 90%;
5) compression moulding
The material mixing is sent into ball press, under the pressure of>=130MPa, be pressed into the pelletizing that diameter is 45～55mm, density is 1.9g-2.35g/cm
3;
6) dry
Pelletizing after compression moulding is put into dry kiln, and be 96～120 hours time of drying;
7) calcining
Dried pelletizing is sent into shaft furnace calcining, and calcining temperature is between 1650～1800 DEG C, and calcination atmosphere is oxidizing atmosphere, and calcination time is 25～30 minutes, finally makes calcium magnesia sand finished product.
2. high silicon magnesite tailings according to claim 1 is prepared the method for calcium magnesia sand, it is characterized in that described step 1) in flotation agent be Sodium hexametaphosphate 99, sodium oleate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410256331.1A CN104072161B (en) | 2014-06-11 | 2014-06-11 | After a kind of magnesite choosing, mine tailing prepares the method for calcium magnesia sand |
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|---|---|---|---|
| CN201410256331.1A CN104072161B (en) | 2014-06-11 | 2014-06-11 | After a kind of magnesite choosing, mine tailing prepares the method for calcium magnesia sand |
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| CN104072161A true CN104072161A (en) | 2014-10-01 |
| CN104072161B CN104072161B (en) | 2015-12-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498621A (en) * | 2019-09-02 | 2019-11-26 | 于景坤 | A kind of preparation method of ultra-fine purification concentrate powder magnesite clinker |
| CN111333351A (en) * | 2020-04-30 | 2020-06-26 | 海城市军刚中档镁砂有限公司 | Raw material homogenizing process for dead burned magnesia shaft kiln |
| CN111943692A (en) * | 2020-06-30 | 2020-11-17 | 辽宁东和新材料股份有限公司 | High-performance magnesia-calcium brick and preparation method thereof |
| CN115947608A (en) * | 2022-12-31 | 2023-04-11 | 辽宁利尔镁质合成材料股份有限公司 | Preparation method of fused synthetic magnesia-calcium sand |
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| JP2004010415A (en) * | 2002-06-06 | 2004-01-15 | Kawasaki Refract Co Ltd | Magnesite-chrome spraying repairing material |
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| CN102633515A (en) * | 2012-05-15 | 2012-08-15 | 辽宁富城特种耐火材料有限公司 | Magnesium-forsterite synthetic sand and preparation method thereof |
| CN102773169A (en) * | 2012-08-06 | 2012-11-14 | 辽宁科技大学 | Collecting agent capable of achieving iron removal during reverse flotation and desiliconization of magnesite ore and preparation method thereof |
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2014
- 2014-06-11 CN CN201410256331.1A patent/CN104072161B/en active Active
Patent Citations (4)
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| JP2004010415A (en) * | 2002-06-06 | 2004-01-15 | Kawasaki Refract Co Ltd | Magnesite-chrome spraying repairing material |
| CN102351441A (en) * | 2011-07-21 | 2012-02-15 | 辽宁科技大学 | Method for producing dead-burned magnesia through one-step calcination of magnesite tailings |
| CN102633515A (en) * | 2012-05-15 | 2012-08-15 | 辽宁富城特种耐火材料有限公司 | Magnesium-forsterite synthetic sand and preparation method thereof |
| CN102773169A (en) * | 2012-08-06 | 2012-11-14 | 辽宁科技大学 | Collecting agent capable of achieving iron removal during reverse flotation and desiliconization of magnesite ore and preparation method thereof |
Non-Patent Citations (1)
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| 付亚峰等: "辽宁海城某低品级菱镁矿脱硅脱钙除铁试验", 《现代矿业》, no. 7, 31 July 2013 (2013-07-31) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498621A (en) * | 2019-09-02 | 2019-11-26 | 于景坤 | A kind of preparation method of ultra-fine purification concentrate powder magnesite clinker |
| CN110498621B (en) * | 2019-09-02 | 2021-11-05 | 于景坤 | Preparation method of superfine purified concentrate powder sintered magnesia |
| CN111333351A (en) * | 2020-04-30 | 2020-06-26 | 海城市军刚中档镁砂有限公司 | Raw material homogenizing process for dead burned magnesia shaft kiln |
| CN111943692A (en) * | 2020-06-30 | 2020-11-17 | 辽宁东和新材料股份有限公司 | High-performance magnesia-calcium brick and preparation method thereof |
| CN111943692B (en) * | 2020-06-30 | 2022-05-10 | 辽宁东和新材料股份有限公司 | High-performance magnesia-calcium brick and preparation method thereof |
| CN115947608A (en) * | 2022-12-31 | 2023-04-11 | 辽宁利尔镁质合成材料股份有限公司 | Preparation method of fused synthetic magnesia-calcium sand |
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| CN104072161B (en) | 2015-12-30 |
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Address after: 114214, Liaoning, Haicheng Province town archway Village Patentee after: Liaoning Donghe New Material Co., Ltd. Address before: 114214, Anshan City, Liaoning province Haicheng City arch Village Patentee before: Liaoning Donghe Refractory Group Co., Ltd. |