CN103484027A - Method for producing bonding agent from illite-smectite interstratified clay - Google Patents

Abstract

The invention provides a method for producing a bonding agent from illite-smectite interstratified clay, which comprises the following steps: adding water into raw ores, crushing, and regulating the concentration of the ore pulp until the solid-to-liquid ratio is (1.5-2.5):8; performing sand throwing and impurity removal treatment on the ore pulp; adding sodium carbonate into the ore pulp, evenly mixing, and naturally settling to separate out a suspension and sediment; and performing pressure filtration on the suspension, drying to remove moisture, adding sodium carbonate to perform sodium modification, standing, compressing, standing again, drying, adding flocculent sodium carboxymethyl cellulose having a molecular weight of 18,000,000 units, evenly mixing, feeding into a pulverizing mill, and performing sodium modification on the material again to obtain the bonding agent. According to the method, the smectite structure in the bonding agent can be kept without being destroyed while impurities are effectively removed, and the layer charge density can not be distorted, thereby ensuring that the qualified bonding agent can be produced from low-quality raw materials, and finally realizing the comprehensive utilization of illite-smectite interstratified clay minerals.

Description

Produce the method for tackiness agent with illite/smectite mixed layer class clay

 

Technical field

The present invention relates to a kind of preparation method of tackiness agent, especially use the method for illite/smectite mixed layer class clay manufacture tackiness agent, belong to the tackiness agent technical field of producing.

Background technology

Illite/smectite mixed layer class clay, take illite and montmorillonite as main, and with a kind of clay class mineral of the mineral paragenesiss such as feldspar, zeolite, calcite, quartz or cristobalite, be commonly called as white clay.Can be used as the raw material of manufacture with tackiness agent.Along with the fast development of China's petrochemical industry, Metallurgical industry in recent years, high-quality tackiness agent required main raw material in producing-bentonitic consumption, create new record in recent years.Illite/smectite mixed layer class clay is larger in the reserve of our province, but as the high-quality binder materials, but belongs to class clay class mineral reserve of inferior quality.Therefore, processing, the utilization of illite/smectite mixed layer class clay pit, become the problem that several generations expert, scholar earnestly seek solution.In other words, being difficult to directly process illite/smectite mixed layer class clay by current prior art is the high-quality industry adhesive.Because existing traditional method is only applicable to process the clay class mineral of quality better.

Summary of the invention

The object of the present invention is to provide a kind of method that can use illite/smectite mixed layer class clay production high-quality industry adhesive.

The present invention completes by following technical proposal: a kind of method of with illite/smectite mixed layer class clay, producing tackiness agent is characterized in that comprising the following steps:

A, add suitable quantity of water in illite/smectite mixed layer class clay raw ore after, send in crusher be crushed to mineral granularity more than 2 microns account for 60 Wt% more than, adjusting pulp density to solid-to-liquid ratio is 1.5～2.5:8;

B, the ore pulp of steps A is sent in the waterpower spiral organ that bore is 100MM, 75MM, 50MM, 25MM successively, carried out sand throwing, removal of impurities is processed, until the quartz in ore pulp, feldspathoid content are down to below 21 Wt%;

C, the ore pulp of step B is sent in settling bowl, and sent in process at ore pulp, by 0.5～0.7 Wt% of pulp solids amount, add soda ash to mix, natural subsidence at least 24 hours, isolate suspension and sediment;

D, the suspension of step C is sent into to pressure filter carry out solid-liquid separation, obtaining moisture content is the following purification material of 40Wt%, being dried to moisture content through routine is below 22 Wt%, by 1.3～1.5 Wt% of siccative amount, adds soda ash, stirring and evenly mixing, coating film, standing at least 72 hours, send the extruding of porous extrusion machine, again coating film, standing at least 72 hours, being dried to moisture content was below 14 Wt%;

E, in the material of step D, add by the 0.2Wt% of siccative amount the cotton-shaped Xylo-Mucine that molecular weight is 1,800 ten thousand units, mix, send in pulverizing mill, make, in 70～75 ℃ of temperature environments of material in pulverizing mill, again, after sodium, to obtain the tackiness agent that moisture content is 8-10Wt%.

Described crusher, waterpower spiral organ, pressure filter, pulverizing mill are conventional equipment.

The present invention has following advantages and effect: adopt such scheme, the deimpurity while can effectively gone, keep smectite structure in tackiness agent not destroy, layer charge density can distortion yet, make montmorillonite purity in tackiness agent, it is pure that color is tending towards, enough hygrometric state cohesive force and green compression strength and the hot green tensile strengths of final assurance, also contain illite in removed impure mineral in addition, feldspar, zeolite, calcite, quartzy, cristobalite and colloidal silica, aluminium sesquioxide etc., therefore remain again through purifying, process, finally make illite/smectite mixed layer class clay mineral be fully utilized.

Embodiment

Below in conjunction with embodiment, the present invention is described further.

Embodiment 1

Handled illite/smectite mixed layer class clay mineral major ingredient is: illite, montmorillonite, sericite, feldspar, zeolite, calcite, quartz, cristobalite and colloidal silica, aluminium sesquioxide etc.;

A, add suitable quantity of water in illite/smectite mixed layer class clay raw ore after, send in crusher be crushed to mineral granularity more than 2 microns account for 60 Wt% more than, adjusting pulp density to solid-to-liquid ratio is 1.5:8;

B, the ore pulp of steps A is sent in the waterpower spiral organ that bore is 100MM, 75MM, 50MM, 25MM successively, carried out sand throwing, removal of impurities is processed, until the quartz in ore pulp, feldspathoid content are down to 20 Wt%;

C, the ore pulp of step B is sent in settling bowl, and sent in process at ore pulp, by 0.5 Wt% of pulp solids amount, add soda ash to mix, natural subsidence at least 24 hours, isolate suspension and sediment;

D, the suspension of step C is sent into to pressure filter carry out solid-liquid separation, the purification material that to obtain moisture content be 40Wt%, being dried to moisture content through routine is 22 Wt%, by 1.3 Wt% of siccative amount, adds soda ash, stirring and evenly mixing, coating film, standing at least 72 hours, send the extruding of porous extrusion machine, again coating film, standing at least 72 hours, being dried to moisture content was 14 Wt%;

E, in the material of step D, add by the 0.2Wt% of siccative amount the cotton-shaped Xylo-Mucine that molecular weight is 1,800 ten thousand units, mix, send in pulverizing mill, make, in 70 ℃ of temperature environments of material in pulverizing mill, again, after sodium, to obtain the tackiness agent that moisture content is 10 Wt%.

Embodiment 2

Handled illite/smectite mixed layer class clay pit is with embodiment 1;

A, add suitable quantity of water in illite/smectite mixed layer class clay raw ore after, send in crusher be crushed to mineral granularity more than 2 microns account for 60 Wt% more than, adjusting pulp density to solid-to-liquid ratio is 2.5:8;

B, the ore pulp of steps A is sent in the waterpower spiral organ that bore is 100MM, 75MM, 50MM, 25MM successively, carried out sand throwing, removal of impurities is processed, until the quartz in ore pulp, feldspathoid content are down to 20 Wt%;

C, the ore pulp of step B is sent in settling bowl, and sent in process at ore pulp, by 0.7 Wt% of pulp solids amount, add soda ash to mix, natural subsidence at least 24 hours, isolate suspension and sediment;

D, the suspension of step C is sent into to pressure filter carry out solid-liquid separation, the purification material that to obtain moisture content be 39Wt%, being dried to moisture content through routine is 21 Wt%, by 1.5 Wt% of siccative amount, adds soda ash, stirring and evenly mixing, coating film, standing at least 72 hours, send the extruding of porous extrusion machine, again coating film, standing at least 72 hours, being dried to moisture content was 13 Wt%;

E, in the material of step D, add by the 0.2Wt% of siccative amount the cotton-shaped Xylo-Mucine that molecular weight is 1,800 ten thousand units, mix, send in pulverizing mill, make, in 75 ℃ of temperature environments of material in pulverizing mill, again, after sodium, to obtain the tackiness agent that moisture content is 8 Wt%.

Embodiment 3

Handled illite/smectite mixed layer class clay pit is with embodiment 1;

A, add suitable quantity of water in illite/smectite mixed layer class clay raw ore after, send in crusher be crushed to mineral granularity more than 2 microns account for 60 Wt% more than, adjusting pulp density to solid-to-liquid ratio is 2:8;

B, the ore pulp of steps A is sent in the waterpower spiral organ that bore is 100MM, 75MM, 50MM, 25MM successively, carried out sand throwing, removal of impurities is processed, until the quartz in ore pulp, feldspathoid content are down to 20 Wt%;

C, the ore pulp of step B is sent in settling bowl, and sent in process at ore pulp, by 0.6 Wt% of pulp solids amount, add soda ash to mix, natural subsidence at least 24 hours, isolate suspension and sediment;

D, the suspension of step C is sent into to pressure filter carry out solid-liquid separation, the purification material that to obtain moisture content be 38Wt%, being dried to moisture content through routine is 20 Wt%, by 1.4 Wt% of siccative amount, adds soda ash, stirring and evenly mixing, coating film, standing at least 72 hours, send the extruding of porous extrusion machine, again coating film, standing at least 72 hours, being dried to moisture content was 13 Wt%;

E, in the material of step D, add by the 0.2Wt% of siccative amount the cotton-shaped Xylo-Mucine that molecular weight is 1,800 ten thousand units, mix, send in pulverizing mill, make, in 72 ℃ of temperature environments of material in pulverizing mill, again, after sodium, to obtain the tackiness agent that moisture content is 9 Wt%.

For showing effect of the present invention, below by the simultaneous test proved:

Test raw material:

Control group is commercial metallurgy tackiness agent;

The tackiness agent that test group is the embodiment of the present invention 2;

Content of the test:

Respectively two groups of test raw materials are blended in the iron ore pellets raw material, make iron ore pellets;

The cold solid dry bulb burst temperature of the iron ore pellets of control group is that 740 ℃, intensity are 268N/,

The cold solid dry bulb burst temperature of the iron ore pellets of test group is that 765 ℃, intensity are 277N/,

Obviously, the iron ore pellets quality of green pellets of test group is greater than control group.

Conclusion:

Tackiness agent provided by the invention, it is a kind of polymerizable molecular of long-chain, water-absorbent is strong, form the plasticity-hydrophilic colloid in the aqueous solution, polar group under normal temperature in molecular side chain and active group, can form the chemical combination keys such as ionic linkage or covalent linkage with ion, the polar molecule on mineral grain surface, adds the bridge chain effect of linear molecule, can significantly improve burst temperature and the intensity of iron ore pellets green-ball, it has the ability of oxidation speed catalysis, accelerates solidifying of pelletizing, improves the intensity of pelletizing.

Product colloid index after the compound sodium of purifying reaches 600ml/15g, and expansion capacity reaches 30 ml/15g, than raw ore colloid index and expansion capacity, reaches and improves respectively 10 times and 5 times.The detection of Jilin University test scientific experiment Spot detection report: at testing conditions: temperature: 20 ℃,relative humidity: 50%, other: under nil case, analyzing and testing result: colloid index 598 ml/15g, expansion capacity 30 ml/15g.

Claims (1)

1. a method of producing tackiness agent with illite/smectite mixed layer class clay, is characterized in that comprising the following steps:

A, add suitable quantity of water in illite/smectite mixed layer class clay raw ore after, send in crusher be crushed to mineral granularity more than 2 microns account for 60 Wt% more than, adjusting pulp density to solid-to-liquid ratio is 1.5～2.5:8;

B, the ore pulp of steps A is sent in the waterpower spiral organ that bore is 100MM, 75MM, 50MM, 25MM successively, carried out sand throwing, removal of impurities is processed, until the quartz in ore pulp, feldspathoid content are down to below 21 Wt%;

C, the ore pulp of step B is sent in settling bowl, and sent in process at ore pulp, by 0.5～0.7 Wt% of pulp solids amount, add soda ash to mix, natural subsidence at least 24 hours, isolate suspension and sediment;

D, the suspension of step C is sent into to pressure filter carry out solid-liquid separation, obtaining moisture content is the following purification material of 40Wt%, being dried to moisture content through routine is below 22 Wt%, by 1.3～1.5 Wt% of siccative amount, adds soda ash, stirring and evenly mixing, coating film, standing at least 72 hours, send the extruding of porous extrusion machine, again coating film, standing at least 72 hours, being dried to moisture content was below 14 Wt%;

E, in the material of step D, add by the 0.2Wt% of siccative amount the cotton-shaped Xylo-Mucine that molecular weight is 1,800 ten thousand units, mix, send in pulverizing mill, make, in 70～75 ℃ of temperature environments of material in pulverizing mill, again, after sodium, to obtain the tackiness agent that moisture content is 8-10Wt%.