阅读说明：本技术 絮凝剂处理锰铁超细尾泥制造复合矿物掺合料的方法 (Method for preparing composite mineral admixture by treating ferromanganese superfine tail mud with flocculant ) 是由 徐兴卫 于 2021-07-08 设计创作，主要内容包括：本发明公开了絮凝剂处理锰铁超细尾泥制造复合矿物掺合料的方法,包括以下步骤：步骤A,在锰铁矿选矿泥水中加入絮凝剂,絮凝沉淀一段时间后进行固液分离,取锰铁超细尾泥絮凝物备用；步骤B,在步骤A得到的锰铁超细尾泥絮凝物中加入石英石粉及石灰石粉,充分混匀后烘干制得半成品；步骤C,将步骤B得到的半成品与粉煤灰及水泥熟料混合加入磨机进行粉磨；步骤D,将步骤C得到的粉磨物料通过均化库进行均化,均化后的粉磨物料陈伏7-10h即得复合矿物掺合料。本发明的方法将现有技术中难以利用的锰铁超细尾泥作为复合矿物掺合料的主要原料,在提高资源利用率的同时还有效降低了掺合料的生产成本,经济环保。(The invention discloses a method for preparing a composite mineral admixture by treating ferromanganese superfine tail mud with a flocculating agent, which comprises the following steps: step A, adding a flocculating agent into the ferromanganese ore dressing muddy water, performing solid-liquid separation after flocculation and precipitation for a period of time, and taking ferromanganese superfine tail mud flocculate for later use; step B, adding quartz powder and limestone powder into the ferromanganese superfine tail mud flocculate obtained in the step A, fully mixing uniformly, and drying to obtain a semi-finished product; step C, mixing the semi-finished product obtained in the step B with the fly ash and the cement clinker, and adding the mixture into a grinding machine for grinding; and D, homogenizing the ground material obtained in the step C through a homogenizing warehouse, and aging the homogenized ground material for 7-10 hours to obtain the composite mineral admixture. The method takes the ferromanganese superfine tailing mud which is difficult to utilize in the prior art as the main raw material of the composite mineral admixture, improves the resource utilization rate, effectively reduces the production cost of the admixture, and is economic and environment-friendly.)

1. The method for preparing the composite mineral admixture by treating the ferromanganese superfine tailing mud with the flocculating agent is characterized by comprising the following steps of:

step A, adding a flocculating agent into the ferromanganese ore dressing muddy water, performing solid-liquid separation after flocculation and precipitation for a period of time, and taking ferromanganese superfine tail mud flocculate for later use;

step B, adding quartz powder and limestone powder into the ferromanganese superfine tail mud flocculate obtained in the step A, fully mixing uniformly, and drying to obtain a semi-finished product;

step C, mixing the semi-finished product obtained in the step B, fly ash and cement clinker, and adding the mixture into a grinding machine for grinding, wherein the grinding fineness is 400-500 meshes;

and D, homogenizing the ground material obtained in the step C through a homogenizing warehouse, and aging the homogenized ground material for 7-10 hours to obtain the composite mineral admixture.

2. The method for preparing the composite mineral admixture by treating the ferromanganese ultrafine tail mud with the flocculant according to claim 1, wherein the method comprises the following steps: in the step A, the flocculant is a polyacrylamide flocculant.

3. The method for preparing the composite mineral admixture by treating the ferromanganese ultrafine tail mud with the flocculant according to claim 1, wherein the method comprises the following steps: in the step A, the flocculating agent is aluminum hydroxide.

4. The method for preparing the composite mineral admixture by treating the ferromanganese ultrafine tail mud with the flocculant according to claim 1, wherein the method comprises the following steps: in the step A, the flocculation precipitation time is 20-30 min.

5. The method for preparing the composite mineral admixture by treating the ferromanganese ultrafine tail mud with the flocculant according to claim 1, wherein the method comprises the following steps: in the step B, the calcium-silicon molar ratio of the ferromanganese superfine tail mud flocculate, the quartz powder and the limestone powder is less than 2.

6. The method for preparing the composite mineral admixture by treating the ferromanganese ultrafine tail mud with the flocculant according to claim 1, wherein the method comprises the following steps: and B, the semi-finished product in the step B comprises 12-15 parts of ferromanganese superfine tail mud flocculate, 6-10 parts of quartz stone powder and 3-5 parts of limestone powder by mass.

7. The method for preparing the composite mineral admixture by treating the ferromanganese ultrafine tail mud with the flocculant according to claim 1, wherein the method comprises the following steps: in the step B, the drying temperature is 600-650 ℃, and the drying time is 20 min.

8. The method for preparing the composite mineral admixture by treating the ferromanganese ultrafine tail mud with the flocculant according to claim 1, wherein the method comprises the following steps: in the step C, the semi-finished product, the fly ash and the cement clinker are respectively as follows by mass percent: 70% -75%, 15% -20% and 5% -10%.

Technical Field

The invention belongs to the technical field of preparation of composite mineral admixtures, and particularly relates to a method for preparing a composite mineral admixture by treating ferromanganese superfine tailings with a flocculating agent.

Background

The ferromanganese ore is ferromanganese oxide mineral, mainly contains iron element and manganese element, is one of iron-making raw materials, and belongs to one mineral in magnetite series in spinel family.

The ferromanganese ore dressing tailings are products of ferromanganese ore dressing muddy water, at present, most mines can only reasonably utilize the particles such as sand and stones, the ferromanganese iron superfine tailings with smaller particle sizes are stored by building a tailing pond, the more the superfine tailings are stored, the influence on the ecological environment is caused, meanwhile, the construction cost and the occupied area for building the tailing pond are also increased, the extra cost of about 20 yuan is also needed for storing one ton of superfine tailings, and the method is neither economical nor environment-friendly.

Disclosure of Invention

The invention aims to provide a method for preparing a composite mineral admixture by treating ferromanganese superfine tail mud with a flocculating agent, which takes the ferromanganese superfine tail mud which is difficult to utilize in the prior art as a main raw material of the composite mineral admixture, improves the resource utilization rate, reduces the production cost of the composite mineral admixture, and is economic and environment-friendly.

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

the method for preparing the composite mineral admixture by treating the ferromanganese superfine tail mud with the coagulant comprises the following steps:

step A, adding a flocculating agent into the ferromanganese ore dressing muddy water, performing solid-liquid separation after flocculation and precipitation for a period of time, and taking ferromanganese superfine tail mud flocculate for later use;

step B, adding quartz powder and limestone powder into the ferromanganese superfine tail mud flocculate obtained in the step A, fully mixing uniformly, and drying to obtain a semi-finished product;

step C, mixing the semi-finished product obtained in the step B, fly ash and cement clinker, and adding the mixture into a grinding machine for grinding, wherein the grinding fineness is 400-500 meshes;

and D, homogenizing the ground material obtained in the step C through a homogenizing warehouse, and aging the homogenized ground material for 7-10 hours to obtain the composite mineral admixture.

Further, in step a, the flocculant is a polyacrylamide flocculant.

Further, in step a, the flocculant is aluminum hydroxide.

Further, in the step A, the flocculation precipitation time is 20-30 min.

In step B, the molar ratio of calcium to silicon of the ferromanganese superfine tail mud flocculate, the quartz stone powder and the limestone powder is less than 2.

Further, the semi-finished product in the step B comprises 12-15 parts of ferromanganese superfine tail mud flocculate, 6-10 parts of quartz stone powder and 3-5 parts of limestone powder by mass.

Further, in the step B, the drying temperature is 600-650 ℃, and the drying time is 20 min.

Further, in the step C, the semi-finished product, the fly ash and the cement clinker respectively comprise the following components in percentage by mass: 70% -75%, 15% -20% and 5% -10%.

Compared with the prior art, the invention has the beneficial effects that:

the method takes ferromanganese superfine tailing mud which is difficult to utilize in the prior art as a main raw material of the composite mineral admixture, improves the resource utilization rate, reduces the production cost of the composite mineral admixture, is economic and environment-friendly, accords with the energy-saving and environment-friendly idea advocated by the state, and has obvious progress; moreover, the fineness, the fluidity ratio, the activity index, the compressive strength growth ratio of the mortar, the water content, the chloride ion content, the sulfur trichloride content, the stability and the radioactivity of the composite mineral admixture produced by the method all meet the requirements of JG/T486-2015.

Drawings

FIG. 1 is a flow chart of the method of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1, the present invention provides a technical solution: the method for preparing the composite mineral admixture by treating the ferromanganese superfine tailing mud with the flocculating agent comprises the following steps:

step A, adding a flocculating agent into the ferromanganese ore dressing muddy water, performing solid-liquid separation after flocculation and precipitation for a period of time, and taking ferromanganese superfine tail mud flocculate for later use;

step B, adding quartz powder and limestone powder into the ferromanganese superfine tail mud flocculate obtained in the step A, fully mixing uniformly, and drying to obtain a semi-finished product;

step C, mixing the semi-finished product obtained in the step B with the fly ash and the cement clinker, and adding the mixture into a grinding machine for grinding, wherein the grinding fineness is 400 meshes;

and D, homogenizing the ground material obtained in the step C through a homogenizing warehouse, and aging the homogenized ground material for 7 hours to obtain the composite mineral admixture.

Further, in step a, the flocculant is a polyacrylamide flocculant.

Further, in step A, the flocculation time is 20 min.

In step B, the molar ratio of calcium to silicon of the ferromanganese superfine tail mud flocculate, the quartz stone powder and the limestone powder is less than 2.

Further, the semi-finished product in the step B comprises 12 parts of ferromanganese superfine tail mud flocculate, 6 parts of quartz stone powder and 3 parts of limestone powder by mass.

Further, in the step B, the drying temperature is 600 ℃, and the drying time is 20 min.

Further, in the step C, the semi-finished product, the fly ash and the cement clinker respectively comprise the following components in percentage by mass: 70%, 20% and 10%.

Example two:

referring to fig. 1, the present invention provides a technical solution: the method for preparing the composite mineral admixture by treating the ferromanganese superfine tailing mud with the flocculating agent comprises the following steps:

step A, adding a flocculating agent into the ferromanganese ore dressing muddy water, performing solid-liquid separation after flocculation and precipitation for a period of time, and taking ferromanganese superfine tail mud flocculate for later use;

step B, adding quartz powder and limestone powder into the ferromanganese superfine tail mud flocculate obtained in the step A, fully mixing uniformly, and drying to obtain a semi-finished product;

step C, mixing the semi-finished product obtained in the step B with the fly ash and the cement clinker, and adding the mixture into a grinding machine for grinding, wherein the grinding fineness is 450 meshes;

and D, homogenizing the ground material obtained in the step C through a homogenizing warehouse, and aging the homogenized ground material for 8 hours to obtain the composite mineral admixture.

Further, in step a, the flocculant is a polyacrylamide flocculant.

Further, in step A, the flocculation time is 25 min.

In step B, the molar ratio of calcium to silicon of the ferromanganese superfine tail mud flocculate, the quartz stone powder and the limestone powder is less than 2.

Further, the semi-finished product in the step B comprises 13 parts of ferromanganese superfine tail mud flocculate, 8 parts of quartz stone powder and 4 parts of limestone powder by mass.

Further, in the step B, the drying temperature is 620 ℃ and the drying time is 20 min.

Further, in the step C, the semi-finished product, the fly ash and the cement clinker respectively comprise the following components in percentage by mass: 75%, 20% and 5%.

Example three:

referring to fig. 1, the present invention provides a technical solution: the method for preparing the composite mineral admixture by treating the ferromanganese superfine tailing mud with the flocculating agent comprises the following steps:

step A, adding a flocculating agent into the ferromanganese ore dressing muddy water, performing solid-liquid separation after flocculation and precipitation for a period of time, and taking ferromanganese superfine tail mud flocculate for later use;

step B, adding quartz powder and limestone powder into the ferromanganese superfine tail mud flocculate obtained in the step A, fully mixing uniformly, and drying to obtain a semi-finished product;

step C, mixing the semi-finished product obtained in the step B with the fly ash and the cement clinker, and adding the mixture into a grinding machine for grinding, wherein the grinding fineness is 500 meshes;

and D, homogenizing the ground material obtained in the step C through a homogenizing warehouse, and aging the homogenized ground material for 10 hours to obtain the composite mineral admixture.

Further, in step a, the flocculant is aluminum hydroxide.

Further, in step A, the flocculation time is 30 min.

In step B, the molar ratio of calcium to silicon of the ferromanganese superfine tail mud flocculate, the quartz stone powder and the limestone powder is less than 2.

Further, the semi-finished product in the step B comprises 15 parts of ferromanganese superfine tail mud flocculate, 10 parts of quartz powder and 5 parts of limestone powder by mass.

Further, in the step B, the drying temperature is 650 ℃ and the drying time is 20 min.

Further, in the step C, the semi-finished product, the fly ash and the cement clinker respectively comprise the following components in percentage by mass: 75%, 15% and 10%.

Example four:

referring to fig. 1, the present invention provides a technical solution: the method for preparing the composite mineral admixture by treating the ferromanganese superfine tailing mud with the flocculating agent comprises the following steps:

step A, adding a flocculating agent into the ferromanganese ore dressing muddy water, performing solid-liquid separation after flocculation and precipitation for a period of time, and taking ferromanganese superfine tail mud flocculate for later use;

step B, adding quartz powder and limestone powder into the ferromanganese superfine tail mud flocculate obtained in the step A, fully mixing uniformly, and drying to obtain a semi-finished product;

step C, mixing the semi-finished product obtained in the step B with the fly ash and the cement clinker, and adding the mixture into a grinding machine for grinding, wherein the grinding fineness is 450 meshes;

and D, homogenizing the ground material obtained in the step C through a homogenizing warehouse, and aging the homogenized ground material for 9 hours to obtain the composite mineral admixture.

Further, in step a, the flocculant is aluminum hydroxide.

Further, in step A, the flocculation time is 25 min.

In step B, the molar ratio of calcium to silicon of the ferromanganese superfine tail mud flocculate, the quartz stone powder and the limestone powder is less than 2.

Further, the semi-finished product in the step B comprises 13 parts of ferromanganese superfine tail mud flocculate, 7 parts of quartz stone powder and 10 parts of limestone powder by mass.

Further, in the step B, the drying temperature is 600 ℃, and the drying time is 20 min.

Further, in the step C, the semi-finished product, the fly ash and the cement clinker respectively comprise the following components in percentage by mass: 73%, 19% and 8%.

Product detection:

the composite mineral admixtures prepared in the first, second and third examples were tested by the following methods:

fineness:

the results of the tests were as specified in GB/T1345 and are shown in Table 1.

Mobility ratio, activity index, mortar compressive strength increase ratio:

a. main apparatus and materials:

a1, adopting a test instrument specified in GB/T17671 as the test instrument;

a2, adopting a cement standard sample for testing the strength of the test cement according to GSB 14-1510;

a3, adopting standard sand meeting GB/T17671 as test sand;

a4, adopting tap water or distilled water as test water;

a5 composite mineral admixture the composite mineral admixture prepared in the first embodiment, the second embodiment and the third embodiment is used.

b. Test conditions and methods:

b1, the laboratory conforms to the regulation of GB/T17671;

b2, determining the fluidity ratio, the activity index and the mortar compression strength increase ratio, wherein the mortar proportion accords with the specification of table 1.1:

table 1.1: mortar mix ratio

b3, stirring the mortar according to the regulation of GB/T17671;

b4, testing and calculating the fluidity ratio of the composite mineral admixture:

b4.1, testing according to the mixing proportion of the mortar in the table 1.1 and a method specified in GB/T2419, and respectively measuring the fluidity of the contrast mortar and the fluidity of the tested mortar;

b4.2, calculating the fluidity ratio of the complex mineral admixture according to the formula (1), and obtaining the results shown in the table 1 (the results are reserved to be integers):

in the formula:

f is the fluidity ratio of the complex mineral admixture,%;

l is the fluidity of the test mortar, and the unit is millimeter;

L₀-the fluidity of the contrast mortar in mm.

b5, activity index test and calculation of the complex mineral admixture:

b5.1, respectively measuring the compressive strength of the comparative mortar and the test mortar in the corresponding age according to the specification of GB/T17671;

b5.2, calculating the activity index of the complex mineral admixture in each age according to the formula (2), and obtaining the results shown in the table 1 (the results are reserved to be integers):

in the formula:

a-complex mineral admixture activity index,%;

R_tthe compressive strength of the examined mortar at the corresponding age is in MPa;

R₀and comparing the compressive strength of the mortar at the corresponding age, wherein the unit is megapascal.

b6, testing and calculating the increase ratio of the compressive strength of the mortar:

b6.1, respectively measuring the compressive strength of the comparative mortar and the test mortar 28d and 90d according to the specification of GB/T17671;

b6.2, calculating the compressive strength increase ratio of the mortar of the composite mineral admixture according to the formula (3), and obtaining the results shown in the table 1 (the results are reserved to be integers):

in the formula:

p is the increase ratio of the compressive strength of the mortar of the composite mineral admixture, which is accurate to 0.01;

R₉₀the compressive strength of the examined mortar 90d is in mpa;

R₂₈the compressive strength of the mortar 28d to be tested is in mpa;

R_0.90the compressive strength of the comparative mortar 90d is in mpa;

R_0.28compressive strength of comparative mortar 28d in MPa.

Water content:

A. the instrument equipment comprises:

a1, an electrothermal drying box and an electrothermal blowing drying box, wherein the controllable temperature is not lower than 110 ℃, and the minimum division value is not more than 2 ℃;

a2, balance: the measuring range is not less than 100g, and is accurate to 0.01 g.

B. The test steps are as follows:

b1, weighing about 50g of the composite mineral admixture sample, accurately weighing to 0.01g, and pouring into an evaporation pan which is dried to constant weight;

b2, adjusting the temperature of the drying box and controlling the temperature to be 105-110 ℃;

and B3, placing the composite mineral admixture sample into a drying oven to be dried to constant weight, removing the sample, placing the sample in a dryer to be cooled to room temperature, and weighing to be accurate to 0.01 g.

C. And (3) processing test results:

c1, water content calculated according to equation (4), and the results are shown in table 1 (to the nearest 0.1%):

in the formula:

P_W-water content,%;

m_w0-mass of sample before drying in g;

m_w1the mass of the dried sample in g.

C2, weighing two samples for testing, taking the arithmetic mean value of the water contents of the two samples as the test result, and retesting when the absolute difference value of the water contents of the two samples is more than 0.2%.

Sulfur trioxide, chloride ion content:

the results were as specified in GB/T176 and are shown in Table 1.

Stability:

the composite mineral admixture and the cement standard sample meeting the GSB14-1510 strength test are uniformly mixed according to the mass ratio of 3:7, the pressure steaming stability test is carried out according to GB/T750, the boiling stability test is carried out according to GB/T1346, and the results are shown in Table 1.

Sixthly, radioactivity:

the procedure is as described in GB6566, the results are shown in Table 1.

Content of alkali:

the results are shown in Table 1, in accordance with GB/T176.

Table 1: and (3) detection results:

as can be seen from the data in Table 1, the fineness, fluidity ratio, activity index, increase ratio of compressive strength of mortar, water content, chloride ion content, sulfur trichloride content, stability and radioactivity of the composite mineral admixture prepared by the method of the invention all meet the requirements of the composite mineral admixture of easy flow type in JG/T486-.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.