CN103524059A - Method for preparing low energy consumption cement with tin ore tailings as raw materials for resource utilization - Google Patents
Method for preparing low energy consumption cement with tin ore tailings as raw materials for resource utilization Download PDFInfo
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- CN103524059A CN103524059A CN201310462070.4A CN201310462070A CN103524059A CN 103524059 A CN103524059 A CN 103524059A CN 201310462070 A CN201310462070 A CN 201310462070A CN 103524059 A CN103524059 A CN 103524059A
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- mine tailing
- cement
- tailing
- cement clinker
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a method for preparing low energy consumption cement with tin ore tailings as raw materials for resource utilization. By weight, 26%-30% of tin tailings and 70%-74% of high-calcium limestone are mixed fully and uniformly and ground, then are subjected to sieving through a 200-mesh standard sieve, and the sieving residue is less than 10%. Under the condition of oxygen enrichment, a pre-calcination treatment is carried out at the temperature of 950 DEG C for 20min, and sulfide minerals are fully oxidized and decomposed. Then the above products are placed in a burning reaction device for reaction, the calcination temperature is 1300 DEG C-1350 DEG C and the calcination time is 20min-40min. The output materials are treated by a quenching device, and tailing cement clinker is obtained. Dihydrate gypsum weighing 3%-4% of the tailing cement clinker weight is added. The above materials are mixed and ground and subjected to sieving through a 200-mesh standard sieve, and tailing cement finished products are prepared. The method takes full advantage of mineral resources, and realizes massive resource of tin tailings. The method is advantaged by low energy consumption technology, little environmental pollution, little cost and investment, and qualified quality of produced cements.
Description
Technical field
The present invention relates to a kind of recycling tailing is the method that raw material is prepared low-energy consumption cement.
Background technology
At present, it is maximum that mine tailing has become industrial output amount, the industrial solid wastes that comprehensive utilization ratio is minimum.Within 2005, produce 7.14 hundred million tons of mine tailing amounts, comprehensive utilization ratio 7%, and within 2010, increase to 12.14 hundred million tons, comprehensive utilization ratio only reaches 14%.By the end of the year 2012, national Tailings Dam has 12273, and mine tailing is piled up total amount over 10,000,000,000 tons.Mine tailing quantity is large, concentrated, particle is tiny, and surface-area is large, easily flows, and dry rear easy-weathering, takies a large amount of soils, can cause atmospheric pollution, soil desertification; General exceed standard pollutent and the unwanted component of existing, as oxidizable formation obnoxious flavour and sour waters such as residual beneficiation reagent, the sulfide of mineral own, as chromium, arsenic, cadmium, lead, zinc, manganese etc. easily form heavy metal contamination, harm is ploughed and water source, life-threatening property safety; The continuous increase of current tailings pile accumulated amount, will take a large amount of soils and set up new Tailings Dam, and mine tailing treatment facility complex structure, investment cost is high, will certainly increase bargh's economical load, reduces product competitiveness in the market.In addition, " 12 " planning relevant policies propose further to limit the use in Solid waste disposal place, and the clear and definite developing goal of comprehensive utilization of tailing.Ore deposit generation expectation 2015 end of the year rises to 1,300,000,000 tons, and comprehensive utilization target is from the volume of comprehensive utilization of 1.7 hundred million tons in 2010, is promoted to 2.6 hundred million tons in 5 years.Mine tailing complicated component, characteristic differs, comprehensive utilization is mainly to start with from aspects such as minimizing, resource utilization and recyclings, reclaims that mine tailing valuable component and mine tailing integration resource turn to material of construction, make fertilizer or soil improvement agent, the material of Kaolinite Preparation of Catalyst, filling, land reclamation.
Tailing is that tin ore selects the residual smelting solid waste that selects after smelting, complicated component, and main chemical compositions is with SiO
2, Fe
2o
3, CaCO
3, Al
2o
3be main, with silicate cement oxide compound form consistent, but content difference to some extent.Meanwhile, MgO in tin ore mine tailing, K
2the Harmful ingredient contents such as O are low, can not affect and burn till mine tailing soundness, intensity etc.In addition, contain a certain amount of with sulfide mineral (FeS
2) sulphur that exists of form, and the multiple transition metal such as a small amount of or micro-Zn, Pb, Cu, Mo, Bi, grog is burnt till and there is mineralization and fluxing action, can effectively improve the burn-ability of raw material, reduce liquid phase formation temperature, improve the intensity of grog.At present, existing Pb-Zn tailings is as mineralizer or replace other mineral to allocate the case that raw material are produced cement clinker into, but mixed ratio is relatively low, and the report of allocating in a large number tin ore mine tailing production less energy-consumption mine tailing cement in raw material into seldom.Large quantification treatment tailing, realizes mine tailing minimizing, resource utilization, benefit, builds resource-conserving and environment-friendly society of far-reaching significance.
Summary of the invention
The object of this invention is to provide that a kind of to take tin ore mine tailing and high calcium lime stone be main raw material, compared with preparation under less energy-consumption, meeting the method for the mine tailing cement of national standard.
Concrete steps are:
(1) mass percent is respectively to 26% ~ 30% and 70% ~ 74% tailing and high calcium lime stone and fully mixes and grinding, cross 200 mesh standard sieves, and tail over and be less than 10%.
(2) the 950 ℃ of precalcinings under excess oxygen of step (1) gained material are processed to 20min, make the abundant oxygenolysis of sulfide mineral, and then enter to burn till in conversion unit and react, calcining temperature is at 1300 ℃ ~ 1350 ℃, calcination time 20min ~ 40min, discharging is processed and is obtained mine tailing cement clinker through chilled equipment.
(3) after step (2) gained mine tailing cement clinker being added quality be 3% ~ 4% dihydrate gypsum of mine tailing cement clinker quality, mix grinding, crosses 200 mesh standard sieves, and tails over and be less than 10%, makes mine tailing finished cement.
The technology of the present invention tool has the following advantages: tin ore mine tailing particle is substantially all less than 50 orders; can reduce in a large number grinding energy; take it as main material production mine tailing cement; without changing cement production process; can consume in a large number non-ferrous metal and select smelting solid waste; make full use of Mineral resources, preserve the ecological environment, reduce production costs.In tailing, contain the multiple transition metals such as a small amount of sulfide mineral and micro-Zn, Pb, Cu, Mo, Bi, can effectively improve the burn-ability of raw material, reduce fusing point, generate at a lower temperature enough liquid phases, promote solid state reaction, grog firing temperature is reduced to 1300 ℃ ~ 1350 ℃ (compare ordinary portland cement clinker and burn till 100 ℃ ~ 150 ℃ of reductions), effectively reduces grog and burn till energy consumption.Make the mineral composition of mine tailing cement reasonable, stability is good, and intensity is high.
Embodiment
The embodiment of the present invention is used starting material: tailing, high calcium lime stone chemical constitution are as shown in table 1.
Table 1: raw material chemical constitution (mass percent)
| Material name | CaO | SiO 2 | Al 2O 3 | Fe 2O 3 | SO 3 | Loss | ∑ |
| Tailing | 18.71 | 37.81 | 4.71 | 10.61 | 15.19 | 6.32 | 93.35 |
| High calcium lime stone | 54.00 | 0.40 | 1.80 | 1.00 | - | 42.72 | 99.92 |
Embodiment 1:
(1) mass percent is respectively to 30% and 70% tailing and high calcium lime stone and fully mixes and grinding, cross 200 mesh standard sieves, and tail over and be less than 10%.
(2) the 950 ℃ of precalcinings under excess oxygen of step (1) gained material are processed to 20min, make the abundant oxygenolysis of sulfide mineral, and then enter to burn till in conversion unit and react, calcining temperature is at 1300 ℃, calcination time 30min, discharging is processed and is obtained mine tailing cement clinker through chilled equipment.
(3) after step (2) gained mine tailing cement clinker being added quality be 3% dihydrate gypsum of mine tailing cement clinker quality, mix grinding, crosses 200 mesh standard sieves, and tails over and be less than 10%, makes mine tailing finished cement.
Embodiment 2:
(1) mass percent is respectively to 28% and 72% tailing and high calcium lime stone and fully mixes and grinding, cross 200 mesh standard sieves, and tail over and be less than 10%.
(2) the 950 ℃ of precalcinings under excess oxygen of step (1) gained material are processed to 20min, make the abundant oxygenolysis of sulfide mineral, and then enter to burn till in conversion unit and react, calcining temperature is at 1300 ℃, calcination time 20min, discharging is processed and is obtained mine tailing cement clinker through chilled equipment.
(3) after step (2) gained mine tailing cement clinker being added quality be 4% dihydrate gypsum of mine tailing cement clinker quality, mix grinding, crosses 200 mesh standard sieves, and tails over and be less than 10%, makes mine tailing finished cement.
Embodiment 3:
(1) mass percent is respectively to 26% and 74% tailing and high calcium lime stone and fully mixes and grinding, cross 200 mesh standard sieves, and tail over and be less than 10%.
(2) the 950 ℃ of precalcinings under excess oxygen of step (1) gained material are processed to 20min, make the abundant oxygenolysis of sulfide mineral, and then enter to burn till in conversion unit and react, calcining temperature is at 1350 ℃, calcination time 20min, discharging is processed and is obtained mine tailing cement clinker through chilled equipment.
(3) after step (2) gained mine tailing cement clinker being added quality be 4% dihydrate gypsum of mine tailing cement clinker quality, mix grinding, crosses 200 mesh standard sieves, and tails over and be less than 10%, makes mine tailing finished cement.
Embodiment 1,2,3 makes mine tailing cement clinker and corresponding cement performance test result is as shown in table 2.
Table 2: mine tailing cement clinker and corresponding cement performance test result
Claims (1)
1. utilize tin ore mine tailing to prepare a method for cement, be primarily characterized in that concrete steps are:
(1) mass percent is respectively to 26% ~ 30% and 70% ~ 74% tailing and high calcium lime stone and fully mixes and grinding, cross 200 mesh standard sieves, and tail over and be less than 10%;
(2) the 950 ℃ of precalcinings under excess oxygen of step (1) gained material are processed to 20min, make the abundant oxygenolysis of sulfide mineral, and then enter to burn till in conversion unit and react, calcining temperature is at 1300 ℃ ~ 1350 ℃, calcination time 20min ~ 40min, discharging is processed and is obtained mine tailing cement clinker through chilled equipment;
(3), after step (2) gained mine tailing cement clinker being added quality be 3% ~ 4% dihydrate gypsum of mine tailing cement clinker quality, mix grinding, crosses 200 mesh standard sieves and tails over and be less than 10%, makes mine tailing finished cement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310462070.4A CN103524059A (en) | 2013-10-07 | 2013-10-07 | Method for preparing low energy consumption cement with tin ore tailings as raw materials for resource utilization |
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|---|---|---|---|
| CN201310462070.4A CN103524059A (en) | 2013-10-07 | 2013-10-07 | Method for preparing low energy consumption cement with tin ore tailings as raw materials for resource utilization |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496220A (en) * | 2014-11-25 | 2015-04-08 | 广西鱼峰水泥股份有限公司 | Method for improving doping amount of mining ore-dressing detrital mullock in cement |
| CN105293956A (en) * | 2015-11-27 | 2016-02-03 | 张金良 | Ordinary Portland cement clinker preparation method using molybdenum tailings to replace clay |
| CN108314340A (en) * | 2018-04-09 | 2018-07-24 | 河南理工大学 | It is a kind of using tailing as sulphoaluminate cement clinker of raw material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249575A (en) * | 2011-05-09 | 2011-11-23 | 白银有色集团股份有限公司 | Application of waste tailing silicon powder from beneficiation as raw material for preparing portland cement |
| CN102584045A (en) * | 2012-02-01 | 2012-07-18 | 天津中材工程研究中心有限公司 | Active belite-sulphate aluminum cement clinker and preparation method for active belite-sulphate aluminum cement clinker |
| CN102718419A (en) * | 2012-06-29 | 2012-10-10 | 酒钢(集团)宏达建材有限责任公司 | Method for producing portland cement for road by blending iron ore beneficiation tailings in cement |
-
2013
- 2013-10-07 CN CN201310462070.4A patent/CN103524059A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249575A (en) * | 2011-05-09 | 2011-11-23 | 白银有色集团股份有限公司 | Application of waste tailing silicon powder from beneficiation as raw material for preparing portland cement |
| CN102584045A (en) * | 2012-02-01 | 2012-07-18 | 天津中材工程研究中心有限公司 | Active belite-sulphate aluminum cement clinker and preparation method for active belite-sulphate aluminum cement clinker |
| CN102718419A (en) * | 2012-06-29 | 2012-10-10 | 酒钢(集团)宏达建材有限责任公司 | Method for producing portland cement for road by blending iron ore beneficiation tailings in cement |
Non-Patent Citations (1)
| Title |
|---|
| 梁亮等: "用有色金属尾矿制备水泥的工艺条件", 《矿产综合利用》, no. 4, 31 August 2013 (2013-08-31), pages 75 - 78 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496220A (en) * | 2014-11-25 | 2015-04-08 | 广西鱼峰水泥股份有限公司 | Method for improving doping amount of mining ore-dressing detrital mullock in cement |
| CN105293956A (en) * | 2015-11-27 | 2016-02-03 | 张金良 | Ordinary Portland cement clinker preparation method using molybdenum tailings to replace clay |
| CN108314340A (en) * | 2018-04-09 | 2018-07-24 | 河南理工大学 | It is a kind of using tailing as sulphoaluminate cement clinker of raw material and preparation method thereof |
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Application publication date: 20140122 |