CN104148366B - Gangue after acidifying - Google Patents
Gangue after acidifying Download PDFInfo
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- CN104148366B CN104148366B CN201410358766.7A CN201410358766A CN104148366B CN 104148366 B CN104148366 B CN 104148366B CN 201410358766 A CN201410358766 A CN 201410358766A CN 104148366 B CN104148366 B CN 104148366B
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- gangue
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Abstract
The invention discloses the gangue after a kind of acidifying, the main points of its technical scheme are, the gangue ingredient after acidifying is made up of gangue, Concave-convex clay rod, magnesia, sulfuric acid, quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate; By abrasive dust in the gangue ingredient input grinding machine after acidifying, the powder after abrasive dust is the gangue after acidifying.The production method of the gangue after acidifying takes first acidifying to carry out compounding ingredient again, can avoid sulfuric acid and quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate generation chemical reaction; After the acidified process of gangue, pH value controls 5.0 ~ 7.0, can improve the utilization rate of gangue.Gangue after acidifying has good adsorptivity, thixotropy, heat endurance, plasticity and close-burning feature.Gangue after acidifying is applicable to produce environment-friendly materials, construction material, blowing agent and fire product.
Description
Technical field
The present invention relates to acidification, be specifically related to the gangue after a kind of acidifying.
Background technology
Gangue is the solid waste of mining and discharging in coal washing process, is a kind of black gray expandable rock lower, harder than coal with a kind of phosphorus content of coal seam association in coalification course; Comprise choose from the spoil of extraction top board, base plate and interlayer and coal washing process in the digging gangue in tunnelling process, mining process wash spoil.
China accumulates gangue and reaches more than 1,000,000,000 tons, also will discharge gangue 100,000,000 tons every year, and not only pile up occupation of land, and can also spontaneous combustion contaminated air or cause fire, atmosphere pollution, gangue air storage can produce a large amount of airborne dust, and this is mainly due to after the gangue of ground stacking is exposed to the sun and rain for a long time, will weathering pulverize, in addition, meeting disintegration after gangue water suction, thus be easy to produce dust, under the action of the forces of the wind, the quality of mining area air will be worsened.
In order to improve the application quality of gangue, need to carry out acidification to gangue.
Summary of the invention
The object of the invention is to overcome weak point in prior art, the gangue after a kind of acidifying is provided.
Gangue ingredient after acidifying is made up of gangue, Concave-convex clay rod, magnesia, sulfuric acid, quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate.
The production method of the gangue after acidifying: by abrasive dust in the gangue ingredient input grinding machine after acidifying, the powder after abrasive dust is the gangue after acidifying.
In gangue, the total content of silica, di-iron trioxide, alundum (Al2O3) is more than 80%, and it is a kind of natural clayey raw material; Gangue has certain activity, and be a kind of active addition, the present invention selects the gangue after pulverizing, grain fineness≤0.5 millimeter of gangue.
Concave-convex clay rod has unique layer chain structure feature, and crystal is needle-like, threadiness or fiber collection shape.Concave-convex clay rod has unique dispersion, high temperature resistant, anti-good colloidal nature and the higher adsorption capacity such as saline and alkaline, and has certain plasticity and cohesive force, and the present invention selects grain fineness≤5 millimeter of Concave-convex clay rod.
Magnesia has the general character of basic anhydride, belongs to Binder Materials, can improve the colloidal property of gangue.
Sulfuric acid select concentration be 98% the concentrated sulfuric acid.
Quick dissolved sodium silicate is white powder material, can rapid solution in water, have that cohesive force is strong, intensity is higher, acid resistance, good heat resistance, the feature of alkali resistance and poor water resistance.
Polyethenol series white solid, external form divide cotton-shaped, graininess, Powdered three kinds; Nonpoisonous and tasteless, graininess can be dissolved in 80--90 DEG C of water, pulverous other powders pre-dispersed after can dissolve at normal temperatures.There is good viscosity, polymerism, caking property and water-retaining property.
Hydroxypropyl methylcellulose has thickening capabilities, salt discharge, pH stability, water-retaining property, dimensional stability, excellent film forming and the feature such as resistance to enzymatic, dispersiveness and caking property widely.
Sodium carbonate has the general character and the heat endurance of salt, soluble in water, and its aqueous solution is alkalescence, in the present invention for adjusting the gangue pH value after acidifying.
The present invention is achieved by following technical proposals:
1, the gangue ingredient after acidifying is made up of following component by weight percentage: the gangue semi-finished product 90 ~ 98% after acidifying, quick dissolved sodium silicate 0.1 ~ 5%, polyvinyl alcohol 0.1 ~ 5%, hydroxypropyl methylcellulose 0.01 ~ 3% and sodium carbonate 0 ~ 3%.
The production method of the gangue 2, after acidifying: by abrasive dust in the gangue ingredient input grinding machine after acidifying, grain fineness≤0.074 millimeter, the powder after abrasive dust is the gangue finished product after acidifying.
3, the half-finished production method of the gangue after acidifying: stir in the mixer (1) input of the batching of gangue mixture operated, then dilute sulfuric acid is slowly added in gangue mixture carry out acidification; (2), by the gangue mixture after acidification, be gangue tablet by twin rollers extruding, thickness≤3 millimeter of gangue tablet; (3) gangue tablet is transported to roasting in swinging drying oven, roasting time is 1 ~ 3 hour, sintering temperature controls at 300 ~ 400 DEG C, gangue tablet water content≤2% after roasting, gangue tablet after roasting is the gangue semi-finished product after acidifying, and PCm is weight percentage.
4, the batching of gangue tablet is made up of following component by weight percentage: gangue mixture 75 ~ 95% and dilute sulfuric acid 5 ~ 25%.
5, the batching of gangue mixture is made up of following component by weight percentage: gangue 68 ~ 92%, Concave-convex clay rod 5 ~ 30% and magnesia 0.1 ~ 3%.
6, the batching of dilute sulfuric acid is made up of following component by weight percentage: concentration is the concentrated sulfuric acid 1 ~ 25% and the water 75 ~ 99% of 98%, concentration be 98% concentrated sulfuric acid percentage be weight percentage.
The production method of the gangue after acidifying takes first acidifying to carry out compounding ingredient again, sulfuric acid and quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate generation chemical reaction can be avoided, give full play to raw-material respective characteristic in batching, and obtain complementation, guarantee the gangue inherent quality after acidifying.
According to the needs of product quality, adopt the gangue pH value after sodium carbonate adjustment acidifying, method is simple.
After the acidified process of gangue, pH value controls 5.0 ~ 7.0, can improve the utilization rate of gangue.
Gangue after acidifying has good adsorptivity, thixotropy, heat endurance, plasticity and close-burning feature.
Gangue after acidifying is applicable to produce environment-friendly materials, construction material, blowing agent and fire product.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
1, the gangue ingredient after acidifying is made up of following component by weight percentage: the gangue semi-finished product 96.5% after acidifying, quick dissolved sodium silicate 1.5%, polyvinyl alcohol 1.4%, hydroxypropyl methylcellulose 0.58% and sodium carbonate 0.02%.
The production method of the gangue 2, after acidifying: by abrasive dust in the gangue ingredient input grinding machine after acidifying, grain fineness≤0.074 millimeter, the powder after abrasive dust is the gangue finished product after acidifying.
3, the half-finished production method of the gangue after acidifying: stir in the mixer (1) input of the batching of gangue mixture operated, then dilute sulfuric acid is slowly added in gangue mixture carry out acidification; (2), by the gangue mixture after acidification, be gangue tablet by twin rollers extruding, thickness≤3 millimeter of gangue tablet; (3) gangue tablet is transported to roasting in swinging drying oven, roasting time is 2 hours, and sintering temperature controls at 300 ~ 350 DEG C, gangue tablet water content≤2% after roasting, and the gangue tablet after roasting is the gangue semi-finished product after acidifying.
4, the batching of gangue tablet is made up of following component by weight percentage: gangue mixture 80% and dilute sulfuric acid 20%.
5, the batching of gangue mixture is made up of following component by weight percentage: gangue 80%, Concave-convex clay rod 18% and magnesia 2%.
6, the batching of dilute sulfuric acid is made up of following component by weight percentage: concentration is the concentrated sulfuric acid 5% and the water 95% of 98%.
Claims (6)
1. the gangue after an acidifying, it is characterized in that, the gangue ingredient after acidifying is made up of following component by weight percentage: the gangue semi-finished product 90 ~ 98% after acidifying, quick dissolved sodium silicate 0.1 ~ 5%, polyvinyl alcohol 0.1 ~ 5%, hydroxypropyl methylcellulose 0.01 ~ 3% and sodium carbonate 0 ~ 3%;
The half-finished production method of gangue after described acidifying: stir in the mixer (1) input of the batching of gangue mixture operated, then dilute sulfuric acid is slowly added in gangue mixture carry out acidification; (2), by the gangue mixture after acidification, be gangue tablet by twin rollers extruding, thickness≤3 millimeter of gangue tablet; (3) gangue tablet is transported to roasting in swinging drying oven, roasting time is 1 ~ 3 hour, sintering temperature controls at 300 ~ 400 DEG C, gangue tablet water content≤2% after roasting, and the gangue tablet after roasting is the gangue semi-finished product after acidifying.
2. the gangue after acidifying as claimed in claim 1, it is characterized in that, the batching of gangue tablet is made up of following component by weight percentage: gangue mixture 75 ~ 95% and dilute sulfuric acid 5 ~ 25%.
3. the gangue after acidifying as claimed in claim 1, it is characterized in that, the batching of gangue mixture is made up of following component by weight percentage: gangue 68 ~ 92%, Concave-convex clay rod 5 ~ 30% and magnesia 0.1 ~ 3%.
4. the gangue after acidifying as claimed in claim 1, it is characterized in that, the batching of dilute sulfuric acid is made up of following component by weight percentage: concentration is the concentrated sulfuric acid 1 ~ 25% and the water 75 ~ 99% of 98%.
5. the gangue after acidifying as claimed in claim 1, is characterized in that, select grain fineness≤0.5 millimeter of gangue, grain fineness≤5 millimeter of Concave-convex clay rod.
6. the production method of the gangue according to claim 1 after acidifying, is characterized in that, by abrasive dust in the gangue ingredient input grinding machine after acidifying, grain fineness≤0.074 millimeter, the powder after abrasive dust is the gangue finished product after acidifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410358766.7A CN104148366B (en) | 2014-07-27 | 2014-07-27 | Gangue after acidifying |
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| CN201410358766.7A CN104148366B (en) | 2014-07-27 | 2014-07-27 | Gangue after acidifying |
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| CN104148366A CN104148366A (en) | 2014-11-19 |
| CN104148366B true CN104148366B (en) | 2016-01-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107807A (en) * | 1994-12-29 | 1995-09-06 | 重庆大学 | Technology for preparing aluminium hydroxide from coal gangue |
| CN1883745A (en) * | 2006-05-30 | 2006-12-27 | 许盛英 | Natural mineral adsorption filtering agent |
| CN101780350A (en) * | 2009-01-19 | 2010-07-21 | 张顺 | Filter material for purifying drinking water and preparation method thereof |
| CN101948142A (en) * | 2010-10-09 | 2011-01-19 | 天津泰达环保有限公司 | Method for producing sludge modifier by utilizing coal gangue |
| JP2013017981A (en) * | 2011-07-14 | 2013-01-31 | Kurita Water Ind Ltd | Detoxification method of solid waste containing heavy metal |
-
2014
- 2014-07-27 CN CN201410358766.7A patent/CN104148366B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107807A (en) * | 1994-12-29 | 1995-09-06 | 重庆大学 | Technology for preparing aluminium hydroxide from coal gangue |
| CN1883745A (en) * | 2006-05-30 | 2006-12-27 | 许盛英 | Natural mineral adsorption filtering agent |
| CN101780350A (en) * | 2009-01-19 | 2010-07-21 | 张顺 | Filter material for purifying drinking water and preparation method thereof |
| CN101948142A (en) * | 2010-10-09 | 2011-01-19 | 天津泰达环保有限公司 | Method for producing sludge modifier by utilizing coal gangue |
| JP2013017981A (en) * | 2011-07-14 | 2013-01-31 | Kurita Water Ind Ltd | Detoxification method of solid waste containing heavy metal |
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| CN104148366A (en) | 2014-11-19 |
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